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Sample records for accelerometers drawing sa572-s4

  1. ACCELEROMETER

    DOEpatents

    Pope, K.E.

    1958-11-25

    A device, commonly known as an accelerometer, is described which may be utllized for measuring acceleratlon with high sensitivity and accuracy tbroughout a relatively wlde range of values. In general, the accelerometer consists of an assembly, including an electric motor stator and a mass element located away from the axis of rotation of the stator, rotatably mounted on a support, and an electric motor rotor positioned within the stator and rotatable thereln. An electrlcal switching circuit controlled by the movement of the stator lntermittently energizes the rotor winding and retards move ment of the stator, and a centrifugal switch is rotatable with the rotor to operate upon attainment of a predetermined rotor rotational velocity.

  2. Accelerometer design

    NASA Technical Reports Server (NTRS)

    Norton, F H; Warner, Edward P

    1921-01-01

    In connection with the development of an accelerometer for measuring the loads on airplanes in free flight a study of the theory of such instruments has been made, and the results of this study are summarized in this report. A portion of the analysis deals particularly with the sources of error and with the limitations placed on the location of the instrument in the airplane. The discussion of the dynamics of the accelerometer includes a study of its theoretical motions and of the way in which they are affected by the natural period of vibration and by the damping, together with a report of some experiments on the effect of forced vibrations on the record.

  3. Space vehicle accelerometer applications

    NASA Technical Reports Server (NTRS)

    1972-01-01

    The physics of accelerometer applications are reviewed, and details are given on accelerometer instruments and the principles of their operations. The functions to which accelerometers are applied are listed, and terms commonly used in accelerometer reports are defined. Criteria guides state what rule, limitation, or standard must be imposed on each essential design element to insure successful design. Elaboration of these criteria in the form of recommended practices show how to satisfy each of these criteria, with the best procedure described when possible.

  4. A PFV2 accelerometer for high shock applications

    NASA Astrophysics Data System (ADS)

    Tise, Bert; Smith, Talbot

    1989-08-01

    The development, fabrication, and testing of a high-g piezoelectric accelerometer that uses polyvinlylidene fluoride as the piezoelectric transducer is described. The accelerometer is designed to continuously measure accelerations up to 1000,000 g. The device is packages in a 3/8 inch hex head bolt and can include a built-in hybrid buffer to provide a low output impedance analog signal. Included are fabrication procedures, mechanical drawings, and software listings for test data analysis programs.

  5. Double resonator cantilever accelerometer

    DOEpatents

    Koehler, D.R.

    1982-09-23

    A digital quartz accelerometer includes a pair of spaced double-ended tuning forks fastened at one end to a base and at the other end through a spacer mass. Transverse movement of the resonator members stresses one and compresses the other, providing a differential frequency output which is indicative of acceleration.

  6. Double resonator cantilever accelerometer

    DOEpatents

    Koehler, Dale R.

    1984-01-01

    A digital quartz accelerometer includes a pair of spaced double-ended tuning forks fastened at one end to a base and at the other end through a spacer mass. Transverse movement of the resonator members stresses one and compresses the other, providing a differential frequency output which is indicative of acceleration.

  7. Superconducting Rebalance Accelerometer

    NASA Technical Reports Server (NTRS)

    Torti, R. P.; Gerver, M.; Leary, K. J.; Jagannathan, S.; Dozer, D. M.

    1996-01-01

    A multi-axis accelerometer which utilizes a magnetically-suspended, high-TC proof mass is under development. The design and performance of a single axis device which is stabilized actively in the axial direction but which utilizes ring magnets for passive radial stabilization is discussed. The design of a full six degree-of-freedom device version is also described.

  8. Drawing Inventors

    ERIC Educational Resources Information Center

    Szekely, George

    2012-01-01

    Children are drawing inventors. Their art is certainly not what most adults think of as drawing. Almost instinctively, kids know that drawing is everywhere--that they can draw with almost anything, and that innumerable surfaces can be converted for art use. Teaching drawing is showing interest and enthusiasm for kids' drawing inventions--instead…

  9. Low G accelerometer testing

    NASA Technical Reports Server (NTRS)

    Vaughan, M. S.

    1972-01-01

    Eight different types of low-g accelerometer tests are covered on the Bell miniature electrostatically suspended accelerometer (MESA) which is known to be sensitive to less than 10 to the minus 7th power earth's gravity. These tests include a mass attracting scheme, Leitz dividing head, Wild theodolite, precision gage blocks, precision tiltmeters, Hilger Watts autocollimator, Razdow Mark 2 autocollimator, and laser interferometer measuring system. Each test is described and a comparison of the results is presented. The output of the MESA was as linear and consistent as any of the available devices were capable of measuring. Although the extent of agreement varied with the test equipment used, it can only be concluded that the indicated errors were attributable to the test equipment coupled with the environmental conditions.

  10. Fiber optic micro accelerometer

    DOEpatents

    Swierkowski, Steve P.

    2005-07-26

    An accelerometer includes a wafer, a proof mass integrated into the wafer, at least one spring member connected to the proof mass, and an optical fiber. A Fabry-Perot cavity is formed by a partially reflective surface on the proof mass and a partially reflective surface on the end of the optical fiber. The two partially reflective surfaces are used to detect movement of the proof mass through the optical fiber, using an optical detection system.

  11. Levitated micro-accelerometer.

    SciTech Connect

    Warne, Larry Kevin; Schmidt, Carrie Frances; Peterson, Kenneth Allen; Kravitz, Stanley H.; Renn, Rosemarie A.; Peter, Frank J.; Kinney, Ragon D.; Gilkey, Jeffrey C.

    2004-06-01

    The objective is a significant advancement in the state-of-the-art of accelerometer design for tactical grade (or better) applications. The design goals are <1 milli-G bias stability across environments and $200 cost. This quantum leap in performance improvement and cost reduction can only be achieved by a radical new approach, not incremental improvements to existing concepts. This novel levitated closed-loop accelerometer is implemented as a hybrid micromachine. The hybrid approach frees the designer from the limitations of any given monolithic process and dramatically expands the available design space. The design can be tailored to the dynamic range, resolution, bandwidth, and environmental requirements of the application while still preserving all of the benefits of monolithic MEMS fabrication - extreme precision, small size, low cost, and low power. An accelerometer was designed and prototype hardware was built, driving the successful development and refinement of several 'never been done before' fabrication processes. Many of these process developments are commercially valuable and are key enablers for the realization of a wide variety of useful micro-devices. While controlled levitation of a proof mass has yet to be realized, the overall design concept remains sound. This was clearly demonstrated by the stable and reliable closed-loop control of a proof mass at the test structure level. Furthermore, the hybrid MEMS implementation is the most promising approach for achieving the ambitious cost and performance targets. It is strongly recommended that Sandia remain committed to the original goal.

  12. A Simple Accelerometer Calibrator

    NASA Astrophysics Data System (ADS)

    Salam, R. A.; Islamy, M. R. F.; Munir, M. M.; Latief, H.; Irsyam, M.; Khairurrijal

    2016-08-01

    High possibility of earthquake could lead to the high number of victims caused by it. It also can cause other hazards such as tsunami, landslide, etc. In that case it requires a system that can examine the earthquake occurrence. Some possible system to detect earthquake is by creating a vibration sensor system using accelerometer. However, the output of the system is usually put in the form of acceleration data. Therefore, a calibrator system for accelerometer to sense the vibration is needed. In this study, a simple accelerometer calibrator has been developed using 12 V DC motor, optocoupler, Liquid Crystal Display (LCD) and AVR 328 microcontroller as controller system. The system uses the Pulse Wave Modulation (PWM) form microcontroller to control the motor rotational speed as response to vibration frequency. The frequency of vibration was read by optocoupler and then those data was used as feedback to the system. The results show that the systems could control the rotational speed and the vibration frequencies in accordance with the defined PWM.

  13. Children's Drawings.

    ERIC Educational Resources Information Center

    Burgess, Ann W.; Hartman, Carol R.

    1993-01-01

    This paper reviews the literature on projective drawing tests and child sexual abuse, focusing on children's drawings as an associative tool for memory. The use of the event drawing series, which is a series of seven drawings by a child that graphically present the child's thinking about a specific event, is discussed. (JDD)

  14. Single-Axis Accelerometer

    NASA Technical Reports Server (NTRS)

    Tucker, Dennis Stephen (Inventor); Capo-Lugo, Pedro A. (Inventor)

    2016-01-01

    A single-axis accelerometer includes a housing defining a sleeve. An object/mass is disposed in the sleeve for sliding movement therein in a direction aligned with the sleeve's longitudinal axis. A first piezoelectric strip, attached to a first side of the object and to the housing, is longitudinally aligned with the sleeve's longitudinal axis. The first piezoelectric strip includes a first strip of a piezoelectric material with carbon nanotubes substantially aligned along a length thereof. A second piezoelectric strip, attached to a second side of the object and to the housing, is longitudinally aligned with the sleeve's longitudinal axis. The second piezoelectric strip includes a second strip of the piezoelectric material with carbon nanotubes substantially aligned along a length thereof. A voltage sensor is electrically coupled to at least one of the first and second piezoelectric strips.

  15. The LISA accelerometer

    NASA Astrophysics Data System (ADS)

    Rodrigues, M.; Touboul, P.

    2003-10-01

    In the frame of investigating the fundamental nature of gravity, the Laser Interferometer Space Antenna (LISA) mission could open the way to a new kind of observations unreachable from ground. The experiment, based on a V-formation of six drag-free spacecraft, uses the cubic proof masses of inertial sensors to reflect the laser light, acting as reference mirrors of a 5 × 10 9 m arm length interferometer. The proof masses are also used as inertial references for the drag-free control of the spacecraft which constitute in return a shield against external forces. Derived from space electrostatic accelerometers developed at ONERA, such as GRADIO for the ESA ARISTOTELES and now GOCE mission (Bernard and Touboul, 1991), the proposed LISA sensor should shield its proof mass from any accelerometric disturbance at a level of 10 -15ms-2Hz- 1/2. The accurate capacitive sensing of the mass provides its position relative to the satellite with a resolution better than 10 -9m Hz- 1/2 in order to control the satellite orbit and to minimise the disturbances induced by the satellite self gravity or by the proof mass charge. The sensor configuration and accomodation has to be specifically optimised for the mission requirements. Fortunately, the sensor will benefit from the thermal stability of the LISA optical bench environment, i.e. 10 -6K Hz- 1/2, and of the selected materials that exhibit a very low coefficient of thermal expansion (CTE), ensuring a high geometrical stability. Apart from the modeling and the evaluation of the flight characteristics, the necessary indirect ground demonstration of the performance and the interfaces with the drag-free control will have to be considered in detail in the future.

  16. Measurement of Impact Acceleration: Mouthpiece Accelerometer Versus Helmet Accelerometer

    PubMed Central

    Higgins, Michael; Halstead, P. David; Snyder-Mackler, Lynn; Barlow, David

    2007-01-01

    Context: Instrumented helmets have been used to estimate impact acceleration imparted to the head during helmet impacts. These instrumented helmets may not accurately measure the actual amount of acceleration experienced by the head due to factors such as helmet-to-head fit. Objective: To determine if an accelerometer attached to a mouthpiece (MP) provides a more accurate representation of headform center of gravity (HFCOG) acceleration during impact than does an accelerometer attached to a helmet fitted on the headform. Design: Single-factor research design in which the independent variable was accelerometer position (HFCOG, helmet, MP) and the dependent variables were g and Severity Index (SI). Setting: Independent impact research laboratory. Intervention(s): The helmeted headform was dropped (n = 168) using a National Operating Committee on Standards for Athletic Equipment (NOCSAE) drop system from the standard heights and impact sites according to NOCSAE test standards. Peak g and SI were measured for each accelerometer position during impact. Main Outcome Measures: Upon impact, the peak g and SI were recorded for each accelerometer location. Results: Strong relationships were noted for HFCOG and MP measures, and significant differences were seen between HFCOG and helmet g measures and HFCOG and helmet SI measures. No statistically significant differences were noted between HFCOG and MP g and SI measures. Regression analyses showed a significant relationship between HFCOG and MP measures but not between HFCOG and helmet measures. Conclusions: Upon impact, MP acceleration (g) and SI measurements were closely related to and more accurate in measuring HFCOG g and SI than helmet measurements. The MP accelerometer is a valid method for measuring head acceleration. PMID:17597937

  17. Wearable accelerometer in clinical use.

    PubMed

    Tamura, Toshiyo

    2005-01-01

    To improve the equality of life, we must prevent the falls in both healthy elderly and patients with the cerebrovascular diseases. Wearable accelerometer was applied to monitor. In this paper, we introduced two different clinical applications. On is fall detector and the other is monitoring device for screening test. 1) We have developed body-worn accelerometer with data loggers and monitored the daily of life in patient with Parkinson disease. The patients wore the device and monitored falls while walking and standing. As a result, we could obtain fall times for a long period. 2) The ability of walking and standing have been evaluated by Timed up & go test. We used telemetry with accelerometer. The stability of walking could be evaluated by the acceleration signals. The simple body-won device can be useful for fall study.

  18. In-fiber integrated accelerometer.

    PubMed

    Peng, Feng; Yang, Jun; Li, Xingliang; Yuan, Yonggui; Wu, Bing; Zhou, Ai; Yuan, Libo

    2011-06-01

    A compact in-fiber integrated fiber-optic Michelson interferometer based accelerometer is proposed and investigated. In the system, the sensing element consists of a twin-core fiber acting as a bending simple supported beam. By demodulating the optical phase shift, we obtain that the acceleration is proportional to the force applied on the central position of the twin-core fiber. A simple model has been established to calculate the sensitivity and resonant frequency. The experimental results show that such an accelerometer has a sensitivity of 0.09 rad/g at the resonant frequency of 680 Hz.

  19. Accelerometer having integral fault null

    NASA Technical Reports Server (NTRS)

    Bozeman, Richard J., Jr. (Inventor)

    1995-01-01

    An improved accelerometer is introduced. It comprises a transducer responsive to vibration in machinery which produces an electrical signal related to the magnitude and frequency of the vibration; and a decoding circuit responsive to the transducer signal which produces a first fault signal to produce a second fault signal in which ground shift effects are nullified.

  20. Variometric Tests for Accelerometer Sensors

    NASA Astrophysics Data System (ADS)

    D'Urso, M. G.; Barbati, N.

    2012-07-01

    This paper has been re-published as: VARIOMETRIC TESTS FOR ACCELEROMETER SENSORS M. G. D'Urso and N. Barbati ISPRS Annals of the Photogrammetry, Remote Sensing and Spatial Information Sciences, I-4, 2012 Page(s) 315-320

  1. Multiple-stage integrating accelerometer

    DOEpatents

    Devaney, H.F.

    1984-06-27

    An accelerometer assembly is provided for use in activating a switch in response to multiple acceleration pulses in series. The accelerometer includes a housing forming a chamber. An inertial mass or piston is slidably disposed in the chamber and spring biased toward a first or reset position. A damping system is also provided to damp piston movement in response to first and subsequent acceleration pulses. Additionally, a cam, including a Z-shaped slot, and cooperating follower pin slidably received therein are mounted to the piston and the housing. The middle or cross-over leg of the Z-shaped slot cooperates with the follower pin to block or limit piston movement and prevent switch activation in response to a lone acceleration pulse. The switch of the assembly is only activated after two or more separate acceleration pulses are sensed and the piston reaches the end of the chamber opposite the reset position.

  2. Multiple-stage integrating accelerometer

    DOEpatents

    Devaney, Howard F.

    1986-01-01

    An accelerometer assembly is provided for use in activating a switch in response to multiple acceleration pulses in series. The accelerometer includes a housing forming a chamber. An inertial mass or piston is slidably disposed in the chamber and spring biased toward a first or reset position. A damping system is also provided to damp piston movement in response to first and subsequent acceleration pulses. Additionally, a cam, including a Z-shaped slot, and cooperating follower pin slidably received therein are mounted to the piston and the housing. The middle or cross-over leg of the Z-shaped slot cooperates with the follower pin to block or limit piston movement and prevent switch activation in response to a lone acceleration pulse. The switch of the assembly is only activated after two or more separate acceleration pulses are sensed and the piston reaches the end of the chamber opposite the reset position.

  3. Helmsman’s Recording Accelerometer.

    DTIC Science & Technology

    2007-11-02

    Silage , Principal Electrical Engineer Mitchell B. Oslon, Research Engineer Conrad Technologies, Inc. Station Square One, Suite 102 Paoli, PA 19301...SUBTITLE Helmsman’s Recording Accelerometer 6. AUTHOR(S) Donald F. DeCleene Mitchell B. Oslon Dennis A. Silage 7. PERFORMING ORGANIZATION NAME(S) AND...58,1995. McCreight, K. K., "Assessing the Seaworthiness of SWATH Ships," SNAME Transactions, vol. 95, pp. 189-214,1987. Silage , D., Hartmann, B

  4. Accelerometer and strain gage evaluation

    NASA Astrophysics Data System (ADS)

    Ammerman, D. J.; Madsen, M. M.; Uncapher, W. L.; Stenberg, D. R.; Bronowski, D. R.

    1991-06-01

    This document describes the method developed by Sandia National Laboratories (SNL) to evaluate transducer used in the design certification testing of nuclear material shipping packages. This testing project was performed by SNL for the Office of Civilian Radioactive Waste Management (OCRWM). This evaluation is based on the results of tests conducted to measure ruggedness, failure frequency, repeatability, and manufacturers' calibration data under both field and laboratory conditions. The results of these tests are provided and discussed. The transducer were selected for testing by surveying cask contractors and testing facilities. Important insights relating to operational characteristics of accelerometer types were gained during field testing.

  5. Superconducting six-axis accelerometer

    NASA Technical Reports Server (NTRS)

    Paik, H. J.

    1990-01-01

    A new superconducting accelerometer, capable of measuring both linear and angular accelerations, is under development at the University of Maryland. A single superconducting proof mass is magnetically levitated against gravity or any other proof force. Its relative positions and orientations with respect to the platform are monitored by six superconducting inductance bridges sharing a single amplifier, called the Superconducting Quantum Interference Device (SQUID). The six degrees of freedom, the three linear acceleration components and the three angular acceleration components, of the platform are measured simultaneously. In order to improve the linearity and the dynamic range of the instrument, the demodulated outputs of the SQUID are fed back to appropriate levitation coils so that the proof mass remains at the null position for all six inductance bridges. The expected intrinsic noise of the instrument is 4 x 10(exp -12)m s(exp -2) Hz(exp -1/2) for linear acceleration and 3 x 10(exp -11) rad s(exp -2) Hz(exp -1/2) for angular acceleration in 1-g environment. In 0-g, the linear acceleration sensitivity of the superconducting accelerometer could be improved by two orders of magnitude. The design and the operating principle of a laboratory prototype of the new instrument is discussed.

  6. Display-And-Alarm Circuit For Accelerometer

    NASA Technical Reports Server (NTRS)

    Bozeman, Richard J., Jr.

    1995-01-01

    Compact accelerometer assembly consists of commercial accelerometer retrofit with display-and-alarm circuit. Provides simple means for technician attending machine to monitor vibrations. Also simpifies automatic safety shutdown by providing local alarm or shutdown signal when vibration exceeds preset level.

  7. Micromachined high-g accelerometers: a review

    NASA Astrophysics Data System (ADS)

    Narasimhan, V.; Li, H.; Jianmin, M.

    2015-03-01

    This Topical Review reviews research and commercial development of high-g micromachined accelerometers. Emphasis is placed on different high-g sensing schemes and popular design templates used to achieve high-g sensing. Additionally, trends in high-g micromachined accelerometer development both in research and in the market are discussed.

  8. GRADIO three-axis electrostatic accelerometers

    NASA Technical Reports Server (NTRS)

    Bernard, A.

    1987-01-01

    Dedicated accelerometers for satellite gravity gradiometry (GRADIO project) are described. The design profits from experience acquired with the CACTUS accelerometer payload of the satellite CASTOR-D5B and studies of highly accurate accelerometers for inertial navigation. The principle of operation, based on a three-axis electrostatic suspension of a cubic proof mass, is well suited for the measurements of accelerations less than 0.0001 m/sec/sec. A resolution better than 10 to the minus 11th power m/sec/sec/sq root Hz is expected.

  9. Hybridizing matter-wave and classical accelerometers

    SciTech Connect

    Lautier, J.; Volodimer, L.; Hardin, T.; Merlet, S.; Lours, M.; Pereira Dos Santos, F.; Landragin, A.

    2014-10-06

    We demonstrate a hybrid accelerometer that benefits from the advantages of both conventional and atomic sensors in terms of bandwidth (DC to 430 Hz) and long term stability. First, the use of a real time correction of the atom interferometer phase by the signal from the classical accelerometer enables to run it at best performance without any isolation platform. Second, a servo-lock of the DC component of the conventional sensor output signal by the atomic one realizes a hybrid sensor. This method paves the way for applications in geophysics and in inertial navigation as it overcomes the main limitation of atomic accelerometers, namely, the dead times between consecutive measurements.

  10. Accelerometer Measurements in the Amusement Park.

    ERIC Educational Resources Information Center

    Reno, Charles; Speers, Robert R.

    1995-01-01

    Describes the use of the Texas Instruments' calculator-based laboratory (CBL) and Vernier accelerometer for measuring the vector sum of the gravitational field and the acceleration of amusement park rides. (JRH)

  11. Optomechanical accelerometers and gravity gradiometers

    NASA Astrophysics Data System (ADS)

    Guzman Cervantes, F.; Pratt, J. R.; Taylor, J. M.

    2015-12-01

    Compact optical cavities can be combined with highly stable mechanical oscillators to yield accelerometers and gravity gradiometers of exquisite sensitivity, which are also traceable to the SI.We have incorporated Fabry-Pérot fiber-optic micro-cavities onto low-loss monolithic fused-silica mechanical oscillators for gradiometry, acceleration, and force sensing. These devices consist solely of a glass oscillator and fiber optics to inject and read out the coherent optical signal, making them very simple and compatible with space applications.We have demonstrated displacement sensitivities better than 200 am/√Hz with these fiber-optic micro-sensors. This translates into broadband acceleration noise floors below 100 nano-g/√Hz over a 10kHz, when combined with compact high frequency mechanical oscillators. Similarly, we have developed monolithic oscillators with resonance frequencies near and below 10 Hz, yielding measurement sensitivities better than 10-9 m/s2.We will introduce our sensor concepts and present results on our fiber-optic displacement sensors and novel optomechanical devices.

  12. Optomechanical accelerometers and gravity gradiometers

    NASA Astrophysics Data System (ADS)

    Guzman, Felipe

    2016-04-01

    Compact optical cavities can be combined with highly stable mechanical oscillators to yield accelerometers and gravity gradiometers of exquisite sensitivity, which are also traceable to the SI. We have incorporated Fabry-Pérot fiber-optic micro-cavities onto low-loss monolithic fused-silica mechanical oscillators for gradiometry, acceleration, and force sensing. These devices consist solely of a glass oscillator and fiber optics to inject and read out the coherent optical signal, making them very simple and compatible with space applications. We have demonstrated displacement sensitivities better than 200 am/√Hz with these fiber-optic micro-sensors. This translates into broadband acceleration noise floors below 100 nano-g/√Hz over a 10kHz, when combined with compact high frequency mechanical oscillators. Similarly, we have developed monolithic oscillators with resonance frequencies near and below 10 Hz, yielding measurement sensitivities better than 10-9 m/s2. We will introduce our sensor concepts and present results on our fiber-optic displacement sensors and novel optomechanical devices.

  13. High G MEMS integrated accelerometer

    SciTech Connect

    Davies, B.R.; Barron, C.C.; Montague, S.; Smith, J.H.; Murray, J.R.; Christenson, T.R.; Bateman, V.I.

    1996-12-31

    This paper describes the design and implementation of a surface micromachined accelerometer for measuring very high levels of acceleration (up to 50,000 G). Both the mechanical and electronic portions of the sensor were integrated on a single substrate using a process developed at Sandia National Laboratories. In this process, the mechanical components of the sensor were first fabricated at the bottom of a trench etched into the water substrate. The trench was then filled with oxide and sealed to protect the mechanical components during subsequent microelectronics processing. The wafer surface was then planarized in preparation for CMOS processing using Chemical Mechanical Polishing (CMP). Next, the CMOS electronics were fabricated on areas of the wafer adjacent to the embedded structures. Finally, the mechanical structures were released and the sensor tested. The mechanical structure of the sensor consisted of two polysilicon plate masses suspended by multiple springs (cantilevered beam structures) over corresponding polysilicon plates fixed to the substrate to form two parallel plate capacitors. The first polysilicon plate mass was suspended using compliant springs (cantilever beams) and acted as a variable capacitor during sensor acceleration. The second polysilicon plate mass was suspended using very stiff springs and acted as a fixed capacitor during acceleration. Acceleration was measured by comparing the capacitance of the variable capacitor (compliant suspension) with the fixed capacitance (stiff suspension).

  14. CHAMP Tracking and Accelerometer Data Analysis Results

    NASA Technical Reports Server (NTRS)

    Lemoine, Frank G.; Luthcke, S. B.; Rowlands, D. D.; Pavlis, D. E.; Colombo, O. L.; Ray, Richard D.; Thompson, B.; Nerem, R. S.; Williams, Teresa A.; Smith, David E. (Technical Monitor)

    2002-01-01

    The CHAMP (Challenging Minisatellite Payload) mission's unique combination of sensors and orbit configuration will enable unprecedented improvements in modeling and understanding the Earth's static gravity field and its temporal variations. CHAMP is the first of two missions (GRACE (Gravity Recovery and Climate Experiment) to be launched in the later part of '01) that combine a new generation of GPS (Global Positioning System) receivers, a high precision three axis accelerometer, and star cameras for the precision attitude determination. In order to isolate the gravity signal for science investigations, it is necessary to perform a detailed reduction and analysis of the GPS and SLR tracking data in conjunction with the accelerometer and attitude data. Precision orbit determination based on the GPS and SLR (Satellite Laser Ranging) tracking data will isolate the orbit perturbations, while the accelerometer data will be used to distinguish the surface forces from those due to the geopotential (static, and time varying). In preparation for the CHAMP and GRACE missions, extensive modifications have been made to NASA/GSFC's GEODYN orbit determination software to enable the simultaneous reduction of spacecraft tracking (e.g. GPS and SLR), three axis accelerometer and precise attitude data. Several weeks of CHAMP tracking and accelerometer data have been analyzed and the results will be presented. Precision orbit determination analysis based on tracking data alone in addition to results based on the simultaneous reduction of tracking and accelerometer data will be discussed. Results from a calibration of the accelerometer will be presented along with the results from various orbit determination strategies. Gravity field modeling status and plans will be discussed.

  15. Characterizing performance of ultra-sensitive accelerometers

    NASA Technical Reports Server (NTRS)

    Sebesta, Henry

    1990-01-01

    An overview is given of methodology and test results pertaining to the characterization of ultra sensitive accelerometers. Two issues are of primary concern. The terminology ultra sensitive accelerometer is used to imply instruments whose noise floors and resolution are at the state of the art. Hence, the typical approach of verifying an instrument's performance by measuring it with a yet higher quality instrument (or standard) is not practical. Secondly, it is difficult to find or create an environment with sufficiently low background acceleration. The typical laboratory acceleration levels will be at several orders of magnitude above the noise floor of the most sensitive accelerometers. Furthermore, this background must be treated as unknown since the best instrument available is the one to be tested. A test methodology was developed in which two or more like instruments are subjected to the same but unknown background acceleration. Appropriately selected spectral analysis techniques were used to separate the sensors' output spectra into coherent components and incoherent components. The coherent part corresponds to the background acceleration being measured by the sensors being tested. The incoherent part is attributed to sensor noise and data acquisition and processing noise. The method works well for estimating noise floors that are 40 to 50 dB below the motion applied to the test accelerometers. The accelerometers being tested are intended for use as feedback sensors in a system to actively stabilize an inertial guidance component test platform.

  16. Electret accelerometers: physics and dynamic characterization.

    PubMed

    Hillenbrand, J; Haberzettl, S; Motz, T; Sessler, G M

    2011-06-01

    Electret microphones are produced in numbers that significantly exceed those for all other microphone types. This is due to the fact that air-borne electret sensors are of simple and low-cost design but have very good acoustical properties. In contrast, most of the discrete structure-borne sound sensors (or accelerometers) are based on the piezoelectric effect. In the present work, capacitive accelerometers utilizing the electret principle were constructed, built, and characterized. These electret accelerometers comprise a metallic seismic mass, covered by an electret film, a ring of a soft cellular polymer supplying the restoring force, and a metallic backplate. These components replace membrane, spacer, and back electrode, respectively, of the electret microphone. An adjustable static pressure to the seismic mass is generated by two metal springs. The dynamic characterization of the accelerometers was carried out by using an electrodynamic shaker and an external charge or voltage amplifier. Sensors with various seismic masses, air gap distances, and electret voltages were investigated. Charge sensitivities from 10 to 40 pC/g, voltage sensitivities from 600 to 2000 mV/g, and resonance frequencies from 3 to 1.5 kHz were measured. A model describing both the charge and the voltage sensitivity is presented. Good agreement of experimental and calculated values is found. The experimental results show that sensitive, lightweight, and inexpensive electret accelerometers can be built.

  17. Designing Electrostatic Accelerometers for Next Gravity Missions

    NASA Astrophysics Data System (ADS)

    Huynh, Phuong-Anh; Foulon, Bernard; Christophe, Bruno; Liorzou, Françoise; Boulanger, Damien; Lebat, Vincent

    2016-04-01

    Square cuboid electrostatic accelerometers sensor core have been used in various combinations in recent and still flying missions (CHAMP, GRACE, GOCE). ONERA is now in the process of delivering such accelerometers for the GRACE Follow-On mission. The goal is to demonstrate the performance benefits of an interferometry laser ranging method for future low-low satellite to satellite missions. The electrostatic accelerometer becoming thus the system main performance limiter, we propose for future missions a new symmetry which will allow for three ultrasensitive axes instead of two. This implies no performance ground testing, as the now cubic proof-mass will be too heavy, but only free fall tests in catapult mode, taking advantage of the additional microgravity testing time offered by the updated ZARM tower. The updated mission will be in better adequacy with the requirements of a next generation of smaller and drag compensated micro-satellites. In addition to the measurement of the surface forces exerted on the spacecraft by the atmospheric drag and by radiation pressures, the accelerometer will become a major part of the attitude and orbit control system by acting as drag free sensor and by accurately measuring the angular accelerations. ONERA also works on a hybridization of the electrostatic accelerometer with an atomic interferometer to take advantage of the absolute nature of the atomic interferometer acceleration measurement and its great accuracy in the [5-100] mHz bandwidth. After a description of the improvement of the GRACE-FO accelerometer with respect to the still in-orbit previous models and a status of its development, the presentation will describe the new cubic configuration and how its operations and performances can be verified in the Bremen drop tower.

  18. Passive Accelerometer System Measurements on MIR

    NASA Technical Reports Server (NTRS)

    Alexander, J. Iwan D.

    1997-01-01

    The Passive Accelerometer System (PAS) is a simple moving ball accelerometer capable of measuring the small magnitude steady relative acceleration that occurs in a low earth orbit spacecraft due to atmospheric drag and the earth's gravity gradient. The acceleration is measured by recording the average velocity of the spherical ball over a suitable time increment. A modified form of Stokes law is used to convert the average velocity into an acceleration. PAS was used to measure acceleration on the MIR space station and on the first United States Microgravity Laboratory (USML-1). The PAS measurement on MIR revealed remarkably low acceleration levels in the SPEKTR module.

  19. Dual Accelerometer Usage Strategy for Onboard Space Navigation

    NASA Technical Reports Server (NTRS)

    Zanetti, Renato; D'Souza, Chris

    2012-01-01

    This work introduces a dual accelerometer usage strategy for onboard space navigation. In the proposed algorithm the accelerometer is used to propagate the state when its value exceeds a threshold and it is used to estimate its errors otherwise. Numerical examples and comparison to other accelerometer usage schemes are presented to validate the proposed approach.

  20. Three-axis MEMS Accelerometer for Structural Inspection

    NASA Astrophysics Data System (ADS)

    Barbin, E.; Koleda, A.; Nesterenko, T.; Vtorushin, S.

    2016-01-01

    Microelectromechanical system accelerometers are widely used for metrological measurements of acceleration, tilt, vibration, and shock in moving objects. The paper presents the analysis of MEMS accelerometer that can be used for the structural inspection. ANSYS Multiphysics platform is used to simulate the behavior of MEMS accelerometer by employing a finite element model and MATLAB/Simulink tools for modeling nonlinear dynamic systems.

  1. Assessment of Differing Definitions of Accelerometer Nonwear Time

    ERIC Educational Resources Information Center

    Evenson, Kelly R.; Terry, James W., Jr.

    2009-01-01

    Measuring physical activity with objective tools, such as accelerometers, is becoming more common. Accelerometers measure acceleration multiple times within a given frequency and summarize this as a count over a pre-specified time period or epoch. The resultant count represents acceleration over the epoch length. Accelerometers eliminate biases…

  2. A novel piezoresistive polymer nanocomposite MEMS accelerometer

    NASA Astrophysics Data System (ADS)

    Seena, V.; Hari, K.; Prajakta, S.; Pratap, Rudra; Ramgopal Rao, V.

    2017-01-01

    A novel polymer MEMS (micro electro mechanical systems) accelerometer with photo-patternable polymer nanocomposite as a piezoresistor is presented in this work. Polymer MEMS Accelerometer with beam thicknesses of 3.3 µm and embedded nanocomposite piezoresistive layer having a gauge factor of 90 were fabricated. The photosensitive nanocomposite samples were prepared and characterized for analyzing the mechanical and electrical properties and thereby ensuring proper process parameters for incorporating the piezoresistive layer into the polymer MEMS accelerometer. The microfabrication process flow and unit processes followed are extremely low cost with process temperatures below 100 °C. This also opens up a new possibility for easy integration of such polymer MEMS with CMOS (complementary metal oxide semiconductor) devices and circuits. The fabricated devices were characterized using laser Doppler vibrometer (LDV) and the devices exhibited a resonant frequency of 10.8 kHz and a response sensitivity of 280 nm g-1 at resonance. The main focus of this paper is on the SU-8/CB nanocomposite piezoresistive MEMS accelerometer technology development which covers the material and the fabrication aspects of these devices. CoventorWare FEA analysis performed using the extracted material properties from the experimental characterization which are in close agreement to performance parameters of the fabricated devices is also discussed. The simulated piezoresistive polymer MEMS devices showed an acceleration sensitivity of 126 nm g-1 and 82 ppm of ΔR/R per 1 g of acceleration.

  3. Micro-Accelerometers Monitor Equipment Health

    NASA Technical Reports Server (NTRS)

    2014-01-01

    Glenn Research Center awarded SBIR funding to Ann Arbor, Michigan-based Evigia Systems to develop a miniaturized accelerometer to account for gravitational effects in space experiments. The company has gone on to implement the technology in its suite of prognostic sensors, which are used to monitor the integrity of industrial machinery. As a result, five employees have been hired.

  4. Smartphone MEMS accelerometers and earthquake early warning

    NASA Astrophysics Data System (ADS)

    Kong, Q.; Allen, R. M.; Schreier, L.; Kwon, Y. W.

    2015-12-01

    The low cost MEMS accelerometers in the smartphones are attracting more and more attentions from the science community due to the vast number and potential applications in various areas. We are using the accelerometers inside the smartphones to detect the earthquakes. We did shake table tests to show these accelerometers are also suitable to record large shakings caused by earthquakes. We developed an android app - MyShake, which can even distinguish earthquake movements from daily human activities from the recordings recorded by the accelerometers in personal smartphones and upload trigger information/waveform to our server for further analysis. The data from these smartphones forms a unique datasets for seismological applications, such as earthquake early warning. In this talk I will layout the method we used to recognize earthquake-like movement from single smartphone, and the overview of the whole system that harness the information from a network of smartphones for rapid earthquake detection. This type of system can be easily deployed and scaled up around the global and provides additional insights of the earthquake hazards.

  5. Low-Cost Accelerometers for Physics Experiments

    ERIC Educational Resources Information Center

    Vannoni, Maurizio; Straulino, Samuele

    2007-01-01

    The implementation of a modern game-console controller as a data acquisition interface for physics experiments is discussed. The investigated controller is equipped with three perpendicular accelerometers and a built-in infrared camera to evaluate its own relative position. A pendulum experiment is realized as a demonstration of the proposed…

  6. Time Domain Switched Accelerometer Design and Fabrication

    DTIC Science & Technology

    2014-09-01

    TECHNICAL REPORT 2052 September 2014 Time -Domain Switched Accelerometer Design and Fabrication Paul Swanson Andrew Wang...Approved for public release. SSC Pacific San Diego, CA 92152-5001 TECHNICAL REPORT 2052 September 2014 Time ...objective of this report is to record the decision-making process for developing the device design and fabrication workflow for the time -domain switched

  7. Accelerometer-controlled automatic braking system

    NASA Technical Reports Server (NTRS)

    Dreher, R. C.; Sleeper, R. K.; Nayadley, J. R., Sr.

    1973-01-01

    Braking system, which employs angular accelerometer to control wheel braking and results in low level of tire slip, has been developed and tested. Tests indicate that system is feasible for operations on surfaces of different slipperinesses. System restricts tire slip and is capable of adapting to rapidly-changing surface conditions.

  8. Robust Optimization of a MEMS Accelerometer Considering Temperature Variations

    PubMed Central

    Liu, Guangjun; Yang, Feng; Bao, Xiaofan; Jiang, Tao

    2015-01-01

    A robust optimization approach for a MEMS accelerometer to minimize the effects of temperature variations is presented. The mathematical model of the accelerometer is built. The effects of temperature variations on the output performance of the accelerometer are determined, and thermal deformation of the accelerometer is analyzed. The deviations of the output capacitance and resonance frequency due to temperature fluctuations are calculated and discussed. The sensitivity analysis method is employed to determine the design variables for robust optimization and find out the key structural parameters that have most significant influence on the output capacitance and resonance frequency of the accelerometer. The mathematical model and procedure for the robust optimization of the accelerometer are proposed. The robust optimization problem is solved and discussed. The robust optimization results show that an optimized accelerometer with high sensitivity, high temperature robustness and decoupling structure is finally obtained. PMID:25785308

  9. Feasibility study of ZnO nanowire made accelerometer

    NASA Astrophysics Data System (ADS)

    Kim, Hyun-Chan; Ko, Hyun-U.; Song, Sangho; Yun, Youngmin; Kim, Jaehwan

    2016-04-01

    Vertically aligned arrays of ZnO nanowire can be used for many applications such as energy harvesters, UV sensors and mechanical sensors. Here we report the feasibility of a miniaturized accelerometer made with ZnO nanowire. For improving the sensitivity of miniaturized piezoelectric accelerometer, size of piezoelectric ceramic should be large which results in heavy accelerometer and low resonance frequency. To resolve the problem for the miniaturized accelerometer fabrication, ZnO nanowire is chosen. ZnO nanowire, which has piezoelectric property with Wurtzite structure. Since it has high aspect ratio, the use of ZnO nanowire leads to increase deformation and piezoelectric response output. The vertically ZnO nanowire array is grown on a copper substrate by hydrothermal synthesis process. Detail Fabrication process of the miniaturized accelerometer is illustrated. To prove the feasibility of the fabricated accelerometer, dynamic response test is performed in comparison with a commercial accelerometer.

  10. Children's Computer Drawings.

    ERIC Educational Resources Information Center

    Alexander, David

    Computer drawing programs have several characteristics that make them appropriate for use in early childhood education. Drawing at the computer is an activity that captures and holds children's attention. Children at all developmental levels of graphic ability can draw at the computer, and their products can be stored in a disc or printed for…

  11. HippoDraw

    SciTech Connect

    Gravina, M.F.; Kunz, P.F.; Rensing, P.E.

    1992-09-01

    HippoDraw is a NeXTSTEP application for viewing statistical data. It has several unique features which make viewing data distributions highly interactive. It also incorporates a set of simple drawing tools. HippoDraw is written in Objective-C and uses the Hippoplotamus library package to handle the n-tuples and displays.

  12. Generative Processes: Thick Drawing

    ERIC Educational Resources Information Center

    Wallick, Karl

    2012-01-01

    This article presents techniques and theories of generative drawing as a means for developing complex content in architecture design studios. Appending the word "generative" to drawing adds specificity to the most common representation tool and clarifies that such drawings are not singularly about communication or documentation but are…

  13. A mechanical filter for FBG accelerometers

    NASA Astrophysics Data System (ADS)

    Bocciolone, Marco; Bucca, Giuseppe; Collina, Andrea; Comolli, Lorenzo

    2014-05-01

    Many applications are characterized by very severe environment from the sensors point of view. An example is the railway field, where often the measurement setup is subjected to high voltage and electromagnetic emission. In these work conditions, optical sensors are more suitable than electrical ones due to their characteristics. In this paper, the acceleration measurements are taken into account. Nowadays many optical accelerometers are present on the market. In particular, in this work FBG accelerometers are considered. This kind of sensors is characterized by an undamped resonance that can produce the break of the sensor. One possibility to avoid this problem is to add a damping effect in order to reduce the resonance amplification. In the following section, the method to reproduce a mechanical filter able to increase the damping coefficient of the sensor is presented. Experimental results in laboratory will be discussed, showing the effectiveness of the solution.

  14. MGRA: Motion Gesture Recognition via Accelerometer.

    PubMed

    Hong, Feng; You, Shujuan; Wei, Meiyu; Zhang, Yongtuo; Guo, Zhongwen

    2016-04-13

    Accelerometers have been widely embedded in most current mobile devices, enabling easy and intuitive operations. This paper proposes a Motion Gesture Recognition system (MGRA) based on accelerometer data only, which is entirely implemented on mobile devices and can provide users with real-time interactions. A robust and unique feature set is enumerated through the time domain, the frequency domain and singular value decomposition analysis using our motion gesture set containing 11,110 traces. The best feature vector for classification is selected, taking both static and mobile scenarios into consideration. MGRA exploits support vector machine as the classifier with the best feature vector. Evaluations confirm that MGRA can accommodate a broad set of gesture variations within each class, including execution time, amplitude and non-gestural movement. Extensive evaluations confirm that MGRA achieves higher accuracy under both static and mobile scenarios and costs less computation time and energy on an LG Nexus 5 than previous methods.

  15. Multi-Axis Accelerometer Calibration System

    NASA Technical Reports Server (NTRS)

    Finley, Tom; Parker, Peter

    2010-01-01

    A low-cost, portable, and simplified system has been developed that is suitable for in-situ calibration and/or evaluation of multi-axis inertial measurement instruments. This system overcomes facility restrictions and maintains or improves the calibration quality for users of accelerometer-based instruments with applications in avionics, experimental wind tunnel research, and force balance calibration applications. The apparatus quickly and easily positions a multi-axis accelerometer system into a precisely known orientation suitable for in-situ quality checks and calibration. In addition, the system incorporates powerful and sophisticated statistical methods, known as response surface methodology and statistical quality control. These methods improve calibration quality, reduce calibration time, and allow for increased calibration frequency, which enables the monitoring of instrument stability over time.

  16. Dark matter direct detection with accelerometers

    NASA Astrophysics Data System (ADS)

    Graham, Peter W.; Kaplan, David E.; Mardon, Jeremy; Rajendran, Surjeet; Terrano, William A.

    2016-04-01

    The mass of the dark matter particle is unknown, and may be as low as ˜1 0-22 eV . The lighter part of this range, below ˜eV , is relatively unexplored both theoretically and experimentally but contains an array of natural dark matter candidates. An example is the relaxion, a light boson predicted by cosmological solutions to the hierarchy problem. One of the few generic signals such light dark matter can produce is a time-oscillating, equivalence-principle-violating force. We propose searches for this using accelerometers, and consider in detail the examples of torsion balances, atom interferometry, and pulsar timing. These approaches have the potential to probe large parts of unexplored parameter space in the next several years. Thus such accelerometers provide radically new avenues for the direct detection of dark matter.

  17. MGRA: Motion Gesture Recognition via Accelerometer

    PubMed Central

    Hong, Feng; You, Shujuan; Wei, Meiyu; Zhang, Yongtuo; Guo, Zhongwen

    2016-01-01

    Accelerometers have been widely embedded in most current mobile devices, enabling easy and intuitive operations. This paper proposes a Motion Gesture Recognition system (MGRA) based on accelerometer data only, which is entirely implemented on mobile devices and can provide users with real-time interactions. A robust and unique feature set is enumerated through the time domain, the frequency domain and singular value decomposition analysis using our motion gesture set containing 11,110 traces. The best feature vector for classification is selected, taking both static and mobile scenarios into consideration. MGRA exploits support vector machine as the classifier with the best feature vector. Evaluations confirm that MGRA can accommodate a broad set of gesture variations within each class, including execution time, amplitude and non-gestural movement. Extensive evaluations confirm that MGRA achieves higher accuracy under both static and mobile scenarios and costs less computation time and energy on an LG Nexus 5 than previous methods. PMID:27089336

  18. A very low noise monolithic Horizontal accelerometer.

    NASA Astrophysics Data System (ADS)

    Bertolini, Alessandro; Takamori, Akiteru; Cella, Giancarlo; Fidecaro, Francesco; Francesconi, Mario; Desalvo, Riccardo; Sannibale, Virginio

    2000-04-01

    We present a new low noise, low frequency, horizontal accelerometer. The mechanical design and the machining process aim to improve the sensitivity in the frequency region between 0.01 and 1 Hz, where metal internal friction and thermal elastic effects become critical. The accelerometer mechanics is shaped as a small folded pendulum in order to obtain a very low resonant frequency and low mechanical losses. A folded pendulum is essentially a mass suspended on one side by a simple pendulum and on the other by an inverted pendulum working antagonistically. The straight pendulum positive gravitational spring constant is balanced by the inverted pendulum’s negative one; by changing the center of mass position one can lower arbitrarily the resonant frequency. The only dissipation is in the anelasticity of the mechanical flex joint and in the readout/actuation system. If the spring constant is minimised, the mechanical losses are minimal. The monolithic design of the accelerometer eliminates the stick-and-slip friction localised in the flexure clamps. Low stiffness, 10 micron thick flex joints are achieved by EDM and electropolishing. The instrument is equipped with a low capacitance position sensor; the signal from the sensor is filtered by a PID controller and fed back to the mass through capacitive force actuator for feedback closed-loop operation. The sensor noise matches the expected thermal noise performances, 10-12 m/√Hz , with measuring range of a few microns. The expected sensitivity, less than 10-11 m/ s^2 / √Hz around 150 mHz, is a factor 30 below the state of the art limit. This accelerometer was designed to be integrated in the active control of the LIGO II mirror seismic isolators.

  19. The GRADIO accelerometer - Design and development status

    NASA Astrophysics Data System (ADS)

    Bernard, A.; Touboul, P.

    The concept of Satellite Gravity Gradiometry based on differential microaccelerometry has been proposed by ONERA in the early eighties. Since 1986, an important effort is devoted to the development of the GRADIO accelerometers. Their configuration has been optimized for the ARISTOTELES mission with the objective of 0.01 Eotvos resolution for an integrating time of 4 s. The achieved resolution, better than 10 exp -9 G, is limited by the actual stability of alignments on the testing equipment.

  20. A novel differential optical fiber accelerometer

    NASA Astrophysics Data System (ADS)

    Pi, Shaohua; Zhao, Jiang; Hong, Guangwei; Jia, Bo

    2013-08-01

    The development of sensitive fiber-optic accelerometers is a subject of continuing interest. To acquire high resolution, Michelson phase interferometric techniques are widely adopted. Among the variety structures, the compliant cylinder approach is particularly attractive due to its high sensitivity that is defined as the induced phase shift per applied acceleration. While the two arms of Michelson interferometer should be at the same optical path, it is inconvenient to adjust the two arms' length to equal, also the polarization instability and phase random drift will cause a signal decline. To overcome these limitations, a novel optical fiber accelerometer based on differential interferometric techniques is proposed and investigated. The interferometer is a Sagnac-like white light interferometer, which means the bandwidth of laser spectrum can be as wide as tens nanometers. This interferometer was firstly reported by Levin in 1990s. Lights are divided to two paths before entering the coupler. To induce time difference, one passes through a delay arm and another goes a direct arm. After modulated by the sensing component, they reflect to opposite arm. The sensing part is formed by a seismic mass that is held to only one compliant cylinder, where the single-mode optical fiber is wrapped tightly. When sticking to vibrations, the cylinder compresses or stretches as a spring. The corresponding changes in cylinder circumference lead to strain in the sensing fibers, which is detected as an optical phase shift by the interferometer. The lights from two arms reach the vibration source at different time, sensing a different accelerate speed; produce a different optic path difference. Integrating the dissimilarity of the accelerated speed by time can obtain the total acceleration graph. A shaker's vibration has been tested by the proposed accelerometer referring to a standard piezoelectric accelerometer. A 99.8% linearity of the optical phase shift to the ground acceleration

  1. High performance MEMS accelerometers for concrete SHM applications and comparison with COTS accelerometers

    NASA Astrophysics Data System (ADS)

    Kavitha, S.; Joseph Daniel, R.; Sumangala, K.

    2016-01-01

    Accelerometers used for civil and huge mechanical structural health monitoring intend to measure the shift in the natural frequency of the monitored structures (<100 Hz) and such sensors should have large sensitivity and extremely low noise floor. Sensitivity of accelerometers is inversely proportional to the frequency squared. Commercial MEMS (Micro Electro-Mechanical System) accelerometers that are generally designed for large bandwidth (e.g 25 kHz in ADXL150) have poor sensor level sensitivity and therefore uses complex signal conditioning electronics to achieve large sensitivity and low noise floor which in turn results in higher cost. In this work, an attempt has been made to design MEMS capacitive and piezoresistive accelerometers for smaller bandwidth using IntelliSuite and CoventorWare MEMS tools respectively. The various performance metrics have been obtained using simulation experiments and the results show that these sensors have excellent voltage sensitivity, noise performance and high resolution at sensor level and are even superior to commercial MEMS accelerometers.

  2. Accelerometer Data Analysis and Presentation Techniques

    NASA Technical Reports Server (NTRS)

    Rogers, Melissa J. B.; Hrovat, Kenneth; McPherson, Kevin; Moskowitz, Milton E.; Reckart, Timothy

    1997-01-01

    The NASA Lewis Research Center's Principal Investigator Microgravity Services project analyzes Orbital Acceleration Research Experiment and Space Acceleration Measurement System data for principal investigators of microgravity experiments. Principal investigators need a thorough understanding of data analysis techniques so that they can request appropriate analyses to best interpret accelerometer data. Accelerometer data sampling and filtering is introduced along with the related topics of resolution and aliasing. Specific information about the Orbital Acceleration Research Experiment and Space Acceleration Measurement System data sampling and filtering is given. Time domain data analysis techniques are discussed and example environment interpretations are made using plots of acceleration versus time, interval average acceleration versus time, interval root-mean-square acceleration versus time, trimmean acceleration versus time, quasi-steady three dimensional histograms, and prediction of quasi-steady levels at different locations. An introduction to Fourier transform theory and windowing is provided along with specific analysis techniques and data interpretations. The frequency domain analyses discussed are power spectral density versus frequency, cumulative root-mean-square acceleration versus frequency, root-mean-square acceleration versus frequency, one-third octave band root-mean-square acceleration versus frequency, and power spectral density versus frequency versus time (spectrogram). Instructions for accessing NASA Lewis Research Center accelerometer data and related information using the internet are provided.

  3. A biomimetic accelerometer inspired by the cricket's clavate hair.

    PubMed

    Droogendijk, H; de Boer, M J; Sanders, R G P; Krijnen, G J M

    2014-08-06

    Crickets use so-called clavate hairs to sense (gravitational) acceleration to obtain information on their orientation. Inspired by this clavate hair system, a one-axis biomimetic accelerometer has been developed and fabricated using surface micromachining and SU-8 lithography. An analytical model is presented for the design of the accelerometer, and guidelines are derived to reduce responsivity due to flow-induced contributions to the accelerometer's output. Measurements show that this microelectromechanical systems (MEMS) hair-based accelerometer has a resonance frequency of 320 Hz, a detection threshold of 0.10 ms(-2) and a dynamic range of more than 35 dB. The accelerometer exhibits a clear directional response to external accelerations and a low responsivity to airflow. Further, the accelerometer's physical limits with respect to noise levels are addressed and the possibility for short-term adaptation of the sensor to the environment is discussed.

  4. Comparison and validation of capacitive accelerometers for health care applications.

    PubMed

    Büsching, Felix; Kulau, Ulf; Gietzelt, Matthias; Wolf, Lars

    2012-05-01

    Fall detection, gait analysis and context recognition are examples of applications where capacitive accelerometers are widely used in health care. In most of the existing work, algorithms were developed for a specific platform and accelerometers were used without explicitly choosing a specific type. With this work we present an inexpensive and practical test setup for replicable and repeatable testing of accelerometers. In addition we use this setup to evaluate six of the most commonly available accelerometers today and list their outcomes for linearity, power consumption and correlation of the tested sensors. We also attempt to an answer to the question of whether applications and algorithms developed for one platform and one type of accelerometer can be easily transferred to another accelerometer.

  5. A new accelerometer recording system for shuttle use

    NASA Technical Reports Server (NTRS)

    Lichtenberg, Byron

    1990-01-01

    Microgravity investigators are interested in enhancing the capabilities and improving the information return from accelerometers used in microgravity research. In addition to improving the accelerometer sensor, efforts should be directed towards using recent advances in microprocessor technology and system design techniques to improve sensor calibration and temperature compensation, online data display and analysis, and data reduction and information storage. Results from the above areas of investigation should be combined in an integrated design for a spaceflight microgravity accelerometer package.

  6. Design and Implementation of a Micromechanical Silicon Resonant Accelerometer

    PubMed Central

    Huang, Libin; Yang, Hui; Gao, Yang; Zhao, Liye; Liang, Jinxing

    2013-01-01

    The micromechanical silicon resonant accelerometer has attracted considerable attention in the research and development of high-precision MEMS accelerometers because of its output of quasi-digital signals, high sensitivity, high resolution, wide dynamic range, anti-interference capacity and good stability. Because of the mismatching thermal expansion coefficients of silicon and glass, the micromechanical silicon resonant accelerometer based on the Silicon on Glass (SOG) technique is deeply affected by the temperature during the fabrication, packaging and use processes. The thermal stress caused by temperature changes directly affects the frequency output of the accelerometer. Based on the working principle of the micromechanical resonant accelerometer, a special accelerometer structure that reduces the temperature influence on the accelerometer is designed. The accelerometer can greatly reduce the thermal stress caused by high temperatures in the process of fabrication and packaging. Currently, the closed-loop drive circuit is devised based on a phase-locked loop. The unloaded resonant frequencies of the prototype of the micromechanical silicon resonant accelerometer are approximately 31.4 kHz and 31.5 kHz. The scale factor is 66.24003 Hz/g. The scale factor stability is 14.886 ppm, the scale factor repeatability is 23 ppm, the bias stability is 23 μg, the bias repeatability is 170 μg, and the bias temperature coefficient is 0.0734 Hz/°C. PMID:24256978

  7. Suitability of MEMS Accelerometers for Condition Monitoring: An experimental study

    PubMed Central

    Albarbar, Alhussein; Mekid, Samir; Starr, Andrew; Pietruszkiewicz, Robert

    2008-01-01

    With increasing demands for wireless sensing nodes for assets control and condition monitoring; needs for alternatives to expensive conventional accelerometers in vibration measurements have been arisen. Micro-Electro Mechanical Systems (MEMS) accelerometer is one of the available options. The performances of three of the MEMS accelerometers from different manufacturers are investigated in this paper and compared to a well calibrated commercial accelerometer used as a reference for MEMS sensors performance evaluation. Tests were performed on a real CNC machine in a typical industrial environmental workshop and the achieved results are presented. PMID:27879734

  8. Suitability of MEMS Accelerometers for Condition Monitoring: An experimental study.

    PubMed

    Albarbar, Alhussein; Mekid, Samir; Starr, Andrew; Pietruszkiewicz, Robert

    2008-02-06

    With increasing demands for wireless sensing nodes for assets control and condition monitoring; needs for alternatives to expensive conventional accelerometers in vibration measurements have been arisen. Micro-Electro Mechanical Systems (MEMS) accelerometer is one of the available options. The performances of three of the MEMS accelerometers from different manufacturers are investigated in this paper and compared to a well calibrated commercial accelerometer used as a reference for MEMS sensors performance evaluation. Tests were performed on a real CNC machine in a typical industrial environmental workshop and the achieved results are presented.

  9. A three-axis ultrasensitive accelerometer for space

    NASA Astrophysics Data System (ADS)

    Bernard, A.

    A three-axis ultrasensitive accelerometer ASTRE (Accelerometre Spatial Triaxial Electrostatique) is a simplified version of the GRADIO accelerometer designed for the ARISTOTELES mission, which operates by measuring the force provided by a three-axis electrostatic suspension of the proof-mass. It covers the g-spectrum from 10 exp -8 to 10 exp -4 in the frequency range dc to 5 Hz. A dedicated test bench was developed in order to preserve the accelerometer from the seismic noise. The paper presents the performance parameters of the ASTRE accelerometer and some of the design schemes.

  10. The GRADIO accelerometer: Design and development status

    NASA Astrophysics Data System (ADS)

    Bernard, Alain; Touboul, M. P.

    1991-12-01

    The concept of Satellite Gravity Gradiometry (SGG) based on differential microaccelerometry as proposed in the early eighties is summarized. Work devoted to the development of the GRADIO accelerometers is described. The configuration was optimized for the Aristoteles mission with the objective of increasing resolution for an integrating time of 4 s. Thanks to the selected three axis configuration, very sensitive differential tests were carried out between two very representative laboratory models, in directions perpendicular to gravity. The resolution of these tests, limited by the actual stability of alignments of the testing equipment is described.

  11. Understanding Children's Drawings.

    ERIC Educational Resources Information Center

    Malchiodi, Cathy A.

    Children's art not only provides a window to children's problems, it also gives them another language with which to share feelings and ideas. This book provides an overview of the multidimensional aspects of children's drawings, and is intended to assist therapists in working with children and their drawings. Chapter 1 discusses projective tests…

  12. Calibrating Accelerometers Using an Electromagnetic Launcher

    SciTech Connect

    Erik Timpson

    2012-05-13

    A Pulse Forming Network (PFN), Helical Electromagnetic Launcher (HEML), Command Module (CM), and Calibration Table (CT) were built and evaluated for the combined ability to calibrate an accelerometer. The PFN has a maximum stored energy of 19.25 kJ bank and is fired by a silicon controlled rectifier (SCR), with appropriate safety precautions. The HEML is constructed out of G-10 fiberglass and is designed to accelerate 600 grams to 10 meters per second. The CM is microcontroller based running Arduino Software. The CM has a keypad input and 7 segment outputs of the bank voltage and desired voltage. After entering a desired bank voltage, the CM controls the charge of the PFN. When the two voltages are equal it allows the fire button to send a pulse to the SCR to fire the PFN and in turn, the HEML. The HEML projectile's tip hits a target that is held by the CT. The CT consists of a table to hold the PFN and HEML, a vacuum chuck, air bearing, velocity meter and catch pot. The Target is held with the vacuum chuck awaiting impact. After impact, the air bearing allows the target to fall freely for the velocity meter to get an accurate reading. A known acceleration is determined from the known change in velocity of the target. Thus, if an accelerometer was attached to the target, the measured value can be compared to the known value.

  13. Classification of Sporting Activities Using Smartphone Accelerometers

    PubMed Central

    Mitchell, Edmond; Monaghan, David; O'Connor, Noel E.

    2013-01-01

    In this paper we present a framework that allows for the automatic identification of sporting activities using commonly available smartphones. We extract discriminative informational features from smartphone accelerometers using the Discrete Wavelet Transform (DWT). Despite the poor quality of their accelerometers, smartphones were used as capture devices due to their prevalence in today's society. Successful classification on this basis potentially makes the technology accessible to both elite and non-elite athletes. Extracted features are used to train different categories of classifiers. No one classifier family has a reportable direct advantage in activity classification problems to date; thus we examine classifiers from each of the most widely used classifier families. We investigate three classification approaches; a commonly used SVM-based approach, an optimized classification model and a fusion of classifiers. We also investigate the effect of changing several of the DWT input parameters, including mother wavelets, window lengths and DWT decomposition levels. During the course of this work we created a challenging sports activity analysis dataset, comprised of soccer and field-hockey activities. The average maximum F-measure accuracy of 87% was achieved using a fusion of classifiers, which was 6% better than a single classifier model and 23% better than a standard SVM approach. PMID:23604031

  14. Validation of cardiac accelerometer sensor measurements.

    PubMed

    Remme, Espen W; Hoff, Lars; Halvorsen, Per Steinar; Naerum, Edvard; Skulstad, Helge; Fleischer, Lars A; Elle, Ole Jakob; Fosse, Erik

    2009-12-01

    In this study we have investigated the accuracy of an accelerometer sensor designed for the measurement of cardiac motion and automatic detection of motion abnormalities caused by myocardial ischaemia. The accelerometer, attached to the left ventricular wall, changed its orientation relative to the direction of gravity during the cardiac cycle. This caused a varying gravity component in the measured acceleration signal that introduced an error in the calculation of myocardial motion. Circumferential displacement, velocity and rotation of the left ventricular apical region were calculated from the measured acceleration signal. We developed a mathematical method to separate translational and gravitational acceleration components based on a priori assumptions of myocardial motion. The accuracy of the measured motion was investigated by comparison with known motion of a robot arm programmed to move like the heart wall. The accuracy was also investigated in an animal study. The sensor measurements were compared with simultaneously recorded motion from a robot arm attached next to the sensor on the heart and with measured motion by echocardiography and a video camera. The developed compensation method for the varying gravity component improved the accuracy of the calculated velocity and displacement traces, giving very good agreement with the reference methods.

  15. Six Degree Freedom Optical Fiber Accelerometer

    NASA Astrophysics Data System (ADS)

    Cazo, Rogerio Moreira; dos Reis Ribeiro, Erik; Nunes, Marcelo Buonocore; Barbosa, Carmem Lucia; de Siqueira Ferreira, Jorge Luis; de Barros Caldas, Tales; dos Santos, Josemir Coelho; de Arruda, Josiel Urbaninho

    2008-10-01

    Linear accelerations measurements are needed in many applications, as industry, military, aircrafts, space navigation, robotics and others. Actually, the most usual solutions to measure linear accelerations are three piezoelectric sensors used in orthogonal mounting, or MEM's sensors chips. Angular accelerations also are interesting to control and stabilize structures, like satellites and servo motors. It is possible to measure angular accelerations in two ways: direct measurement (using special sensors), or indirect measurements (obtaining acceleration of the angular velocity information) [1]. This work intends to present the structural and optical requirements of a six degree freedom opto-mechanical accelerometer based on fiber Bragg grating (FBG). With this sensor, it will be possible the direct measurement of three axial accelerations, and of three angular accelerations, with unlimited rotation angle, using one single proof mass. The FBG's are used as strain sensors and sustaining elements of the proof mass in the structure. Simulations have demonstrated that cross influences of 10 parts per million at worst case are possible. This kind of accelerometer may be used in navigation control, structural monitoring, satellite stabilization, guidance control and harsh environments, for example. The project requirements include the wavelength of FBG's, pre-strain and length of active segment of optical fibers, dimensions, material and structure of inertial proof mass and position of the fibers in the sustaining structure

  16. A System for Monitoring Posture and Physical Activity Using Accelerometers

    DTIC Science & Technology

    2007-11-02

    Abstract- Accelerometers can be used to monitor physical activity in the home over prolonged periods. We describe a novel system for...processing schema in which these parameters are extracted is described. Keywords - physical activity , accelerometers, congestive heart failure, chronic...When monitoring the condition of patients with neurodegenerative or chronic diseases, a knowledge of their body movement and physical activity

  17. Identification of Accelerometer Nonwear Time and Sedentary Behavior

    ERIC Educational Resources Information Center

    Oliver, Melody; Badland, Hannah M.; Schofield, Grant M.; Shepherd, Janine

    2011-01-01

    The primary aim of the current study was to investigate the accuracy of various automated rules for determining accelerometer nonwear time in a sample of predominantly desk-based office workers (using their self-reported nonwear times as a criterion). Second, the authors examined the effect of applying these rules to accelerometer data retention…

  18. Validation of a wireless accelerometer network for energy expenditure measurement.

    PubMed

    Montoye, Alexander H K; Dong, Bo; Biswas, Subir; Pfeiffer, Karin A

    2016-11-01

    The purpose of this study was to validate a wireless network of accelerometers and compare it to a hip-mounted accelerometer for predicting energy expenditure in a semi-structured environment. Adults (n = 25) aged 18-30 engaged in 14 sedentary, ambulatory, exercise, and lifestyle activities over a 60-min protocol while wearing a portable metabolic analyser, hip-mounted accelerometer, and wireless network of three accelerometers worn on the right wrist, thigh, and ankle. Participants chose the order and duration of activities. Artificial neural networks were created separately for the wireless network and hip accelerometer for energy expenditure prediction. The wireless network had higher correlations (r = 0.79 vs. r = 0.72, P < 0.01) but similar root mean square error (2.16 vs. 2.09 METs, P > 0.05) to the hip accelerometer. Measured (from metabolic analyser) and predicted energy expenditure from the hip accelerometer were significantly different for the 3 of the 14 activities (lying down, sweeping, and cycle fast); conversely, measured and predicted energy expenditure from the wireless network were not significantly different for any activity. In conclusion, the wireless network yielded a small improvement over the hip accelerometer, providing evidence that the wireless network can produce accurate estimates of energy expenditure in adults participating in a range of activities.

  19. Technical Reliability Assessment of the Actigraph GT1M Accelerometer

    ERIC Educational Resources Information Center

    Silva, Pedro; Mota, Jorge; Esliger, Dale; Welk, Gregory

    2010-01-01

    The purpose of this study was to determine the reliability of the Actigraph GT1M (Pensacola, FL, USA) accelerometer activity count and step functions. Fifty GT1M accelerometers were initialized to collect simultaneous acceleration counts and steps data using 15-sec epochs. All reliability testing was completed using a mechanical shaker plate to…

  20. High sensitivity optical waveguide accelerometer based on Fano resonance.

    PubMed

    Wan, Fenghua; Qian, Guang; Li, Ruozhou; Tang, Jie; Zhang, Tong

    2016-08-20

    An optical waveguide accelerometer based on tunable asymmetrical Fano resonance in a ring-resonator-coupled Mach-Zehnder interferometer (MZI) is proposed and analyzed. A Fano resonance accelerometer has a relatively large workspace of coupling coefficients with high sensitivity, which has potential application in inertial navigation, missile guidance, and attitude control of satellites. Due to the interference between a high-Q resonance pathway and a coherent background pathway, a steep asymmetric line shape is generated, which greatly improves the sensitivity of this accelerometer. The sensitivity of the accelerometer is about 111.75 mW/g. A 393-fold increase in sensitivity is achieved compared with a conventional MZI accelerometer and is approximately equal to the single ring structure.

  1. Mars Reconnaissance Orbiter Accelerometer Experiment Results

    NASA Astrophysics Data System (ADS)

    Keating, G. M.; Bougher, S. W.; Theriot, M. E.; Zurek, R. W.; Blanchard, R. C.; Tolson, R. H.; Murphy, J. R.

    2007-05-01

    The Mars Reconnaissance Orbiter (MRO) launched on August 12, 2005, designed for aerobraking, achieved Mars Orbital Insertion (MOI), March 10, 2006. Atmospheric density decreases exponentially with increasing height. By small propulsive adjustments of the apoapsis orbital velocity, periapsis altitude is fine tuned to the density surface that safely used the atmosphere of Mars to aerobrake over 400 orbits. MRO periapsis precessed from the South Pole at 6pm LST to near the equator at 3am LST. Meanwhile, apoapsis was brought dramatically from 40,000km at MOI to 460 km at aerobraking completion (ABX) August 30, 2006. After ABX, a few small propulsive maneuvers established the Primary Science Orbit (PSO), which without aerobraking would have required an additional 400 kg of fuel. Each of the 400 plus aerobraking orbits provided a vertical structure and distribution of density, scale heights, and temperatures, along the orbital path, providing key in situ insight into various upper atmosphere (greater than 100 km) processes. One of the major questions for scientists studying Mars is: "Where did the water go?" Honeywell's substantially improved electronics package for its IMU (QA-2000 accelerometer, gyro, electronics) maximized accelerometer sensitivities at the requests of The George Washington University, JPL, and Lockheed Martin. The improved accelerometer sensitivities allowed density measurements to exceed 200km, at least 40 km higher than with Mars Odyssey (MO). This extended vertical structures from MRO into the neutral lower exosphere, a region where various processes may allow atmospheric gasses to escape. Over the eons, water may have been lost in both near the surface and in the upper atmosphere. Thus the water balance throughout the entire atmosphere from subsurface to exosphere may both be critical. Comparisons of data from Mars Global Surveyor (MGS), MO and MRO help characterize key temporal and spatial cycles including: winter polar warming, planetary scale

  2. Modeling of the vibrating beam accelerometer nonlinearities

    NASA Astrophysics Data System (ADS)

    Romanowski, P. A.; Knop, R. C.

    Successful modeling and processing of the output of a quartz Vibrating Beam Accelerometer (VBA), whose errors are inherently nonlinear with respect to input acceleration, are reported. The VBA output, with two signals that are frequencies of vibrating quartz beams, has inherent higher-order terms. In order to avoid vibration rectification errors, the signal output must be sampled at a rapid rate and the output must be reduced using a nonlinear model. The present model, with acceleration as a function of frequency, is derived by a least-squares process where the covariance matrix is obtained from simulated data. The system performance is found to be acceptable to strategic levels, and it is shown that a vibration rectification error of 400 micrograms/sq g can be reduced to 4 micrograms/sq g by using the processor electronics and a nonlinear model.

  3. Making Sense of Children's Drawings

    ERIC Educational Resources Information Center

    Anning, Angela; Ring, Kathy

    2004-01-01

    This book explores how young children learn to draw and draw to learn, at home and school. It provides support for practitioners in developing a pedagogy of drawing in Art and Design and across the curriculum and provide advice for parents about how to make sense of their children's drawings. This book is enlivened with the real drawings of seven…

  4. Validation study of Polar V800 accelerometer

    PubMed Central

    Hernández-Vicente, Adrián; De Cocker, Katrien; Garatachea, Nuria

    2016-01-01

    Background The correct quantification of physical activity (PA) and energy expenditure (EE) in daily life is an important target for researchers and professionals. The objective of this paper is to study the validity of the Polar V800 for the quantification of PA and the estimation of EE against the ActiGraph (ActiTrainer) in healthy young adults. Methods Eighteen Caucasian active people (50% women) aged between 19–23 years wore an ActiTrainer on the right hip and a Polar V800 on the preferred wrist during 7 days. Paired samples t-tests were used to analyze differences in outcomes between devices, and Pearson’s correlation coefficients to examine the correlation between outcomes. The agreement was studied using the Bland-Altman method. Also, the association between the difference and the magnitude of the measurement (heteroscedasticity) was examined. Sensitivity, specificity and area under the receiver operating characteristic curve (ROC-AUC value) were calculated to evaluate the ability of the devices to accurately define a person who fulfills the recommendation of 10,000 daily steps. Results The devices significantly differed from each other on all outcomes (P<0.05), except for Polar V800’s alerts vs. ActiTrainer’s 1 hour sedentary bouts (P=0.595) and Polar V800’s walking time vs. ActiTrainer’s lifestyle time (P=0.484). Heteroscedasticity analyses were significant for all outcomes, except for Kcal and sitting time. The ROC-AUC value was fair (0.781±0.048) and the sensitivity and specificity was 98% and 58%, respectively. Conclusions The Polar V800 accelerometer has a comparable validity to the accelerometer in free-living conditions, regarding “1 hour sedentary bouts” and “V800’s walking time vs. ActiTrainer’s lifestyle time” in young adults. PMID:27570772

  5. Placement of Accelerometers for High Sensing Resolution in Micromanipulation

    PubMed Central

    Latt, W. T.; Tan, U-X.; Riviere, C. N.; Ang, W. T.

    2012-01-01

    High sensing resolution is required in sensing of surgical instrument motion in micromanipulation tasks. Accelerometers can be employed to sense physiological motion of the instrument during micromanipulation. Various configurations of accelerometer placement had been introduced in the past to sense motion of a rigid-body such as a surgical instrument. Placement (location and orientation) of accelerometers fixed in the instrument plays a significant role in achieving high sensing resolution. However, there is no literature or work on the effect of placement of accelerometers on sensing resolution. In this paper, an approach of placement of accelerometers within an available space to obtain highest possible sensing resolution in sensing of rigid-body motion in micromanipulation tasks is proposed. Superiority of the proposed placement approach is shown in sensing of a microsurgical instrument angular motion by comparing sensing resolutions achieved as a result of employing the configuration following the proposed approach and the existing configurations. Apart from achieving high sensing resolution, and design simplicity, the proposed placement approach also provides flexibility in placing accelerometers; hence it is especially useful in applications with limited available space to mount accelerometers. PMID:22423176

  6. Vibration sensing in smart machine rotors using internal MEMS accelerometers

    NASA Astrophysics Data System (ADS)

    Jiménez, Samuel; Cole, Matthew O. T.; Keogh, Patrick S.

    2016-09-01

    This paper presents a novel topology for enhanced vibration sensing in which wireless MEMS accelerometers embedded within a hollow rotor measure vibration in a synchronously rotating frame of reference. Theoretical relations between rotor-embedded accelerometer signals and the vibration of the rotor in an inertial reference frame are derived. It is thereby shown that functionality as a virtual stator-mounted displacement transducer can be achieved through appropriate signal processing. Experimental tests on a prototype rotor confirm that both magnitude and phase information of synchronous vibration can be measured directly without additional stator-mounted key-phasor sensors. Displacement amplitudes calculated from accelerometer signals will become erroneous at low rotational speeds due to accelerometer zero-g offsets, hence a corrective procedure is introduced. Impact tests are also undertaken to examine the ability of the internal accelerometers to measure transient vibration. A further capability is demonstrated, whereby the accelerometer signals are used to measure rotational speed of the rotor by analysing the signal component due to gravity. The study highlights the extended functionality afforded by internal accelerometers and demonstrates the feasibility of internal sensor topologies, which can provide improved observability of rotor vibration at externally inaccessible rotor locations.

  7. Self Diagnostic Accelerometer Testing on the C-17 Aircraft

    NASA Technical Reports Server (NTRS)

    Tokars, Roger P.; Lekki, John D.

    2013-01-01

    The self diagnostic accelerometer (SDA) developed by the NASA Glenn Research Center was tested for the first time in an aircraft engine environment as part of the Vehicle Integrated Propulsion Research (VIPR) program. The VIPR program includes testing multiple critical flight sensor technologies. One such sensor, the accelerometer, measures vibrations to detect faults in the engine. In order to rely upon the accelerometer, the health of the accelerometer must be ensured. The SDA is a sensor system designed to actively determine the accelerometer structural health and attachment condition, in addition to vibration measurements. The SDA uses a signal conditioning unit that sends an electrical chirp to the accelerometer and recognizes changes in the response due to changes in the accelerometer health and attachment condition. To demonstrate the SDAs flight worthiness and robustness, multiple SDAs were mounted and tested on a C-17 aircraft engine. The engine test conditions varied from engine off, to idle, to maximum power. The SDA attachment conditions were varied from fully tight to loose. The newly developed SDA health algorithm described herein uses cross correlation pattern recognition to discriminate a healthy from a faulty SDA. The VIPR test results demonstrate for the first.

  8. A Comparison of Accelerometer Accuracy in Older Adults.

    PubMed

    Phillips, Lorraine J; Petroski, Gregory F; Markis, Natalie E

    2015-01-01

    Older adults' gait disorders present challenges for accurate activity monitoring. The current study compared the accuracy of accelerometer-detected to hand-tallied steps in 50 residential care/assisted living residents. Participants completed two walking trials wearing a Fitbit® Tracker and waist-, wrist-, and ankle-mounted Actigraph GT1M. Agreement between accelerometer and observed counts was calculated using concordance correlation coefficients (CCC), accelerometer to observed count ratios, accelerometer and observed count differences, and Bland-Altman plots. Classification and Regression Tree analysis identified minimum gait speed thresholds to achieve accelerometer accuracy ≥0.80. Participants' mean age was 84.2 and gait speed was 0.64 m/s. All accelerometers underestimated true steps. Only the ankle-mounted GT1M demonstrated positive agreement with observed counts (CCC = 0.205). Thresholds for 0.80 accuracy were gait speeds ≥0.56 m/s for the Fitbit and gait speeds ≥0.71 m/s for the ankle-mounted GT1M. Gait speed and accelerometer placement affected activity monitor accuracy in older adults.

  9. Recent Results from CHAMP Tracking and Accelerometer Data Analysis

    NASA Technical Reports Server (NTRS)

    Luthcke, S. B.; Rowlands, D. D.; Lemoine, F. G.; Nerem, R. S.; Thompson, B.; Pavlis, E.; Williams, T. A.; Colombo, O. L.; Chao, Benjamin F. (Technical Monitor)

    2002-01-01

    The CHAMP mission's unique combination of sensors and orbit configuration will enable unprecedented improvements in modeling and understanding the Earth's static gravity field and its temporal variations. CHAMP is the first of two missions (GRACE to be launched in the early part of 02') that combine a new generation of Global Positioning System (GPS) receivers, a high precision three-axis accelerometer, and star cameras for the precision attitude determination. In order to isolate the gravity signal for science investigations, it is necessary to perform a detailed reduction and analysis of the GPS and Satellite Laser Ranging (SLR) tracking data in conjunction with the accelerometer and attitude data. Precision orbit determination based on the GPS and SLR tracking data will isolate the orbit perturbations, while the accelerometer data will be used to distinguish the non-gravitational forces from those due to the geopotential (static, and time varying). In preparation for the CHAMP and GRACE missions, extensive modifications have been made to NASA/GSFC's GEODYN orbit determination software to enable the simultaneous reduction of spacecraft tracking (e.g. GPS and SLR), three-axis accelerometer and precise attitude data. Several weeks of CHAMP tracking and accelerometer data have been analyzed and the results will be presented. Precision orbit determination analysis based on tracking data alone in addition to results based on the simultaneous reduction of tracking and accelerometer data will be discussed. Results from a calibration of the accelerometer will be presented along with the results from various orbit determination strategies.

  10. Predicting Human Movement with Multiple Accelerometers Using Movelets

    PubMed Central

    He, Bing; Bai, Jiawei; Zipunnikov, Vadim V.; Koster, Annemarie; Caserotti, Paolo; Lange-Maia, Brittney; Glynn, Nancy W.; Harris, Tamara B.; Crainiceanu, Ciprian M.

    2014-01-01

    Purpose The study aims were: 1) to develop transparent algorithms that use short segments of training data for predicting activity types; and 2) to compare prediction performance of proposed algorithms using single accelerometers and multiple accelerometers. Methods Sixteen participants (age, 80.6 yr (4.8 yr); BMI, 26.1 kg·m−2 (2.5 kg·m−2)) performed fifteen life-style activities in the laboratory, each wearing three accelerometers at the right hip, left and right wrists. Triaxial accelerometry data were collected at 80 Hz using Actigraph GT3X+. Prediction algorithms were developed, which, instead of extracting features, build activity specific dictionaries composed of short signal segments called movelets. Three alternative approaches were proposed to integrate the information from the multiple accelerometers. Results With at most several seconds of training data per activity, the prediction accuracy at the second-level temporal resolution was very high for lying, standing, normal/fast walking, and standing up from a chair (the median prediction accuracy ranged from 88.2% to 99.9% based on the single-accelerometer movelet approach). For these activities wrist-worn accelerometers performed almost as well as hip-worn accelerometers (the median difference in accuracy between wrist and hip ranged from −2.7% to 5.8%). Modest improvements in prediction accuracy were achieved by integrating information from multiple accelerometers. Discussion and conclusions It is possible to achieve high prediction accuracy at the secondlevel temporal resolution with very limited training data. To increase prediction accuracy from the simultaneous use of multiple accelerometers, a careful selection of integrative approaches is required. PMID:25134005

  11. Photocopy of drawing (November, 1934 Architectural Drawings by Burge and ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    Photocopy of drawing (November, 1934 Architectural Drawings by Burge and Stevens Architects, in possession of the Atlanta Housing Authority, Atlanta, GA) TYPICAL SECTION AND ELEVATION DRAWINGS FOR FRONT ENTRANCES, REAR ENTRANCES, WINDOWS AND SHELTER STRUCTURES. DRAWING NO. A-20. - Techwood Homes (Public Housing), Bounded by North Avenue, Parker Street, William Street & Lovejoy Street, Atlanta, Fulton County, GA

  12. The vertical accelerometer, a new instrument for air navigation

    NASA Technical Reports Server (NTRS)

    Laboccetta, Letterio

    1923-01-01

    This report endeavors to show the possibility of determining the rate of acceleration and the advantage of having such an accelerometer in addition to other aviation instruments. Most of the discussions concern balloons.

  13. Design and fabrication of wireless remotely readable MEMS accelerometers

    NASA Astrophysics Data System (ADS)

    Varadan, Vijay K.; Subramanian, Hareesh; Varadan, Vasundara V.

    1997-11-01

    The integration of MEMS, SAW devices and required microelectronics and conformal antenna to realize a programmable wireless accelerometer is presented in this paper. This unique combination of technologies results in a novel accelerometer that can be remotely sensed by a microwave system with the advantage of no power requirements at the sensor site. The microaccelerometer presented is simple in construction and easy to manufacture with existing silicon micromachining techniques. The relatively small size of the sensor makes it an ideal conformal sensor. The accelerometer finds application as air bag deployment sensors, vibration sensors for noise control, deflection and strain sensors, inertial and dimensional positioning systems, ABS/traction control, smart suspension, active roll stabilization and four wheel steering. The wireless accelerometer is very attractive to study the response of a 'dummy' in automobile crash test.

  14. Wireless accelerometer iPod application for quantifying gait characteristics.

    PubMed

    LeMoyne, Robert; Mastroianni, Timothy; Grundfest, Warren

    2011-01-01

    The capability to quantify gait characteristics through a wireless accelerometer iPod application in an effectively autonomous environment may alleviate the progressive strain on highly specific medical resources. The iPod consists of the inherent attributes imperative for robust gait quantification, such as a three dimensional accelerometer, data storage, flexible software, and the capacity for wireless transmission of the gait data through email. Based on the synthesis of the integral components of the iPod, a wireless accelerometer iPod application for quantifying gait characteristics has been tested and evaluated in an essentially autonomous environment. The quantified gait acceleration waveforms were wirelessly transmitted using email for postprocessing. The site for the gait experiment occurred in a remote location relative to the location where the postprocessing was conducted. The wireless accelerometer iPod application for quantifying gait characteristics demonstrated sufficient accuracy and consistency.

  15. Drawing inside the Box

    ERIC Educational Resources Information Center

    Franklin, Ranella

    2007-01-01

    When working with very young children and/or students with special needs, it is beneficial for teachers to think "outside the box" in order to preserve and enhance a child's natural curiosity. In an effort to teach young children to control their drawing tools, they are often presented with coloring book-type pages and instructed to "stay inside…

  16. Mechanical Drawing and Design.

    ERIC Educational Resources Information Center

    Mikulsky, Marilyn; McEnaney, Walter K.

    A syllabus is provided for a comprehensive foundation course in mechanical drawing and design for grades 9, 10, 11, or 12 that is prerequisite to advanced elective courses. Introductory materials include course objectives, an overview of basic concepts, and guidelines for implementation. Brief discussions of and suggestions for the areas of design…

  17. Drawing with Picasso

    ERIC Educational Resources Information Center

    Hubbert, Beth

    2012-01-01

    In this article, the author describes how her third-grade art students made linear face drawings. Inspired by Pablo Picasso, an artist who tried to maintain the quality of child-like art, the students invented their own abstract line faces true to Picasso's artistic intentions. (Contains 1 online resource.)

  18. LANCE Q-flex accelerometer qualification test program

    NASA Astrophysics Data System (ADS)

    Hunter, J. S.; Mitchell, J. N.; Hester, T.; Searcy, D.

    1982-03-01

    This report covers the performance obtained on six Sundstrand Q-Flex accelerometers during the qualification test program for the LANCE missile. The Qualification Test Program was divided into three parts: (1) Flight Assurance Tests (FAT), (2) Storage and Transportation Tests (SATT), and (3) Reliability Overstress Tests (ROT). All testing was performed in accordance with Vought accelerometer procurement specification 704-166C dated 8 June 1978.

  19. Optical fiber accelerometer based on a silicon micromachined cantilever

    NASA Astrophysics Data System (ADS)

    Malki, Abdelrafik; Lecoy, Pierre; Marty, Jeanine; Renouf, Christine; Ferdinand, Pierre

    1995-12-01

    An intensity-modulated fiber-optic accelerometer based on backreflection effects has been manufactured and tested. It uses a multimode fiber placed at a spherical mirror center, and the beam intensity is modulated by a micromachined silicon cantilever. This device has applications as an accelerometer and vibrometer for rotating machines. It exhibits an amplitude linearity of +/-1.2% in the range of 0.1-22 m s-2, a frequency linearity of +/-1% in the

  20. Performance of several low-cost accelerometers

    USGS Publications Warehouse

    Evans, J.R.; Allen, R.M.; Chung, A. I.; Cochran, E.S.; Guy, R.; Hellweg, M.; Lawrence, J. F.

    2014-01-01

    Several groups are implementing low‐cost host‐operated systems of strong‐motion accelerographs to support the somewhat divergent needs of seismologists and earthquake engineers. The Advanced National Seismic System Technical Implementation Committee (ANSS TIC, 2002), managed by the U.S. Geological Survey (USGS) in cooperation with other network operators, is exploring the efficacy of such systems if used in ANSS networks. To this end, ANSS convened a working group to explore available Class C strong‐motion accelerometers (defined later), and to consider operational and quality control issues, and the means of annotating, storing, and using such data in ANSS networks. The working group members are largely coincident with our author list, and this report informs instrument‐performance matters in the working group’s report to ANSS. Present examples of operational networks of such devices are the Community Seismic Network (CSN; csn.caltech.edu), operated by the California Institute of Technology, and Quake‐Catcher Network (QCN; Cochran et al., 2009; qcn.stanford.edu; November 2013), jointly operated by Stanford University and the USGS. Several similar efforts are in development at other institutions. The overarching goals of such efforts are to add spatial density to existing Class‐A and Class‐B (see next paragraph) networks at low cost, and to include many additional people so they become invested in the issues of earthquakes, their measurement, and the damage they cause.

  1. Factors associated with participant compliance in studies using accelerometers.

    PubMed

    Lee, Paul H; Macfarlane, Duncan J; Lam, T H

    2013-09-01

    Participant compliance is an important issue in studies using accelerometers. Some participants wear the accelerometer for the duration specified by the researchers but many do not. We investigated a range of demographic factors associated with participant compliance in obtaining analyzable accelerometer data. A total of 3601 participants (aged 47.6±13.1 years, 44.6% male) were included. They were asked to wear an accelerometer (ActiGraph) for four consecutive days after completing a household survey during March 2009-January 2011 in Hong Kong. Participants wore the accelerometer on average for 13.9h in a 24-h day. No significant difference was found between males and females (p=0.38). Using log-linear regression, it was found that older participants (0.5% more wearing hours for each year of age, p<0.001), those with full-time job (p<0.01), with tertiary education (p<0.01), non-smokers (p<0.01) and with high self-reported health (p<0.05) wore the accelerometer for more hours. These results provide details for estimating compliance rates for samples with different characteristics and thus sample size calculation to account for participant compliance.

  2. Isolation of a piezoresistive accelerometer used in high acceleration tests

    NASA Astrophysics Data System (ADS)

    Bateman, V. I.; Brown, F. A.; Davie, N. T.

    Both uniaxial and triaxial shock isolation techniques for a piezoresistive accelerometer have been developed for pyroshock and impact tests. The uniaxial shock isolation technique has demonstrated acceptable characteristics for a temperature range of -50 to +186 F and a frequency bandwidth of DC to 10 kHz. The triaxial shock isolation technique has demonstrated acceptable results for a temperature range of -50 to 70 F and a frequency bandwidth of DC to 10 kHz. These temperature ranges, that are beyond the accelerometer manufacturer's operational limits of -30 and +150 F, required the calibration of accelerometers at high shock levels and at the temperature extremes of -50 and +160 F. The purposes of these calibrations were to insure that the accelerometers operated at the field test temperatures and to provide an accelerometer sensitivity at each test temperature. Since there is no NIST-traceable (National Institute of Standards and Technology traceable) calibration capability at shock levels of 5,000 - 15,000 g for the temperature extremes of -50 and +160 F, a method for calibrating and certifying the Hopkinson bar with a transfer standard was developed. Time domain and frequency domain results are given that characterize the Hopkinson bar. The NIST-traceable accuracy for the standard accelerometer in shock is +\\-5%. The Hopkinson bar has been certified by the Sandia Secondary Standards Division with an uncertainty of 6%.

  3. Processing of multi-satellite accelerometer data for thermospheric modelling

    NASA Astrophysics Data System (ADS)

    Doornbos, Eelco; Visser, Pieter N. A. M.; van Helleputte, Tom; van den Ijssel, Jose; Foerster, Matthias; Luehr, Hermann; Rees, David; Koppenwallner, Georg; Fritsche, Bent; Kern, Michael; Haagmans, Roger

    Satellite accelerometers, such as those carried on the CHAMP and GRACE satellites, provide valuable data for improving our knowledge of thermosphere density and winds. These data are now available over a full range of solar activity conditions and over a wide range of heights and local times. The fact that the CHAMP and GRACE accelerometer data sets are largely overlapping in time offers the opportunity to study their synergy. Continuity of this multisatellite accelerometer data set will be provided by ESA's Swarm mission, a constellation of three satellites for studying the Earth's magnetic field. This overview will cover both the processing steps required for converting accelerometer data into density and wind data, and the scientific investigations resulting from this data. Scientific investigations that make use of the accelerometer data sets include comparisons with and adjustment of empirical and physical thermosphere models, studies of the response of the thermosphere on geomagnetic storm conditions and characterization of thermospheric structures by analysis of long-term averages. Accelerometer calibration errors and attitude errors in the satellite aerodynamic model can be largely reduced by making use of data from the satellite's GPS receivers and star cameras. However, considerable uncertainties remain due to insufficient knowledge of the in-track wind speed, the gas-surface interaction and cross-track calibration. These uncertainties can be characterized by using error analysis, by comparing different processing approaches and by comparisons with force models.

  4. Using commodity accelerometers and gyroscopes to improve speed and accuracy of JanusVF

    NASA Astrophysics Data System (ADS)

    Hutson, Malcolm; Reiners, Dirk

    2010-01-01

    Several critical limitations exist in the currently available commercial tracking technologies for fully-enclosed virtual reality (VR) systems. While several 6DOF solutions can be adapted to work in fully-enclosed spaces, they still include elements of hardware that can interfere with the user's visual experience. JanusVF introduced a tracking solution for fully-enclosed VR displays that achieves comparable performance to available commercial solutions but without artifacts that can obscure the user's view. JanusVF employs a small, high-resolution camera that is worn on the user's head, but faces backwards. The VR rendering software draws specific fiducial markers with known size and absolute position inside the VR scene behind the user but in view of the camera. These fiducials are tracked by ARToolkitPlus and integrated by a single-constraint-at-a-time (SCAAT) filter to update the head pose. In this paper we investigate the addition of low-cost accelerometers and gyroscopes such as those in Nintendo Wii remotes, the Wii Motion Plus, and the Sony Sixaxis controller to improve the precision and accuracy of JanusVF. Several enthusiast projects have implemented these units as basic trackers or for gesture recognition, but none so far have created true 6DOF trackers using only the accelerometers and gyroscopes. Our original experiments were repeated after adding the low-cost inertial sensors, showing considerable improvements and noise reduction.

  5. Italian spring accelerometer (ISA) a high sensitive accelerometer for ``BepiColombo'' ESA CORNERSTONE

    NASA Astrophysics Data System (ADS)

    Iafolla, V.; Nozzoli, S.

    2001-12-01

    The targets of the ESA CORNERSTONE mission to Mercury "BepiColombo" are concerned with both planetary and magnetospheric physics and to test some aspects of the general relativity. A payload devoted to a set of experiments named radio science is located within one of the three proposed modules, the Mercury Planetary Orbiter (MPO). In particular, a high sensitivity accelerometer ( a min<10 -9√g/ Hz in the range 10 -4- 10 -1 Hz) will measure the inertial acceleration acting on the MPO. Such data, together with tracking data are used to evaluate the purely gravitational trajectory of the MPO, transforming it to a virtual drag-free satellite system. The ISA accelerometer, considered for this mission, is a well-studied instrument developed at the Istituto di Fisica dello Spazio Interplanetario (IFSI), with the financial support of the Agenzia Spaziale Italiana (ASI). A prototype of such an instrument was constructed, matching the requirements of the radio science experiment. Results of the study concerning the use of ISA in the BepiColombo mission are reported here, particular care being devoted to the description of the instrument and to its sensitivity and thermal stabilisation.

  6. Relative performance of several inexpensive accelerometers

    USGS Publications Warehouse

    Evans, John R.; Rogers, John A.

    1995-01-01

    We examined the performance of several low-cost accelerometers for highly cost-driven applications in recording earthquake strong motion. We anticipate applications for such sensors in providing the lifeline and emergency-response communities with an immediate, comprehensive picture of the extent and characteristics of likely damage. We also foresee their use as 'filler' instruments sited between research-grade instruments to provide spatially detailed and near-field records of large earthquakes (on the order of 1000 stations at 600-m intervals in San Fernando Valley, population 1.2 million, for example). The latter applications would provide greatly improved attenuation relationships for building codes and design, the first examples of mainshock information (that is, potentially nonlinear regime) for microzonation, and a suite of records for structural engineers. We also foresee possible applications in monitoring structural inter-story drift during earthquakes, possibly leading to local and remote alarm functions as well as design criteria. This effort appears to be the first of its type at the USGS. It is spurred by rapid advances in sensor technology and the recognition of potential non-classical applications. In this report, we estimate sensor noise spectra, relative transfer functions and cross-axis sensitivity of six inexpensive sensors. We tested three micromachined ('silicon-chip') sensors in addition to classical force-balance and piezoelectric examples. This sample of devices is meant to be representative, not comprehensive. Sensor noise spectra were estimated by recording system output with the sensor mounted on a pneumatically supported 545-kg optical-bench isolation table. This isolation table appears to limit ground motion to below our system noise level. These noise estimates include noise introduced by signal-conditioning circuitry, the analog-to-digital converter (ADC), and noise induced in connecting wiring by ambient electromagnetic fields in

  7. Strong Motion Seismograph Based On MEMS Accelerometer

    NASA Astrophysics Data System (ADS)

    Teng, Y.; Hu, X.

    2013-12-01

    The MEMS strong motion seismograph we developed used the modularization method to design its software and hardware.It can fit various needs in different application situation.The hardware of the instrument is composed of a MEMS accelerometer,a control processor system,a data-storage system,a wired real-time data transmission system by IP network,a wireless data transmission module by 3G broadband,a GPS calibration module and power supply system with a large-volumn lithium battery in it. Among it,the seismograph's sensor adopted a three-axis with 14-bit high resolution and digital output MEMS accelerometer.Its noise level just reach about 99μg/√Hz and ×2g to ×8g dynamically selectable full-scale.Its output data rates from 1.56Hz to 800Hz. Its maximum current consumption is merely 165μA,and the device is so small that it is available in a 3mm×3mm×1mm QFN package. Furthermore,there is access to both low pass filtered data as well as high pass filtered data,which minimizes the data analysis required for earthquake signal detection. So,the data post-processing can be simplified. Controlling process system adopts a 32-bit low power consumption embedded ARM9 processor-S3C2440 and is based on the Linux operation system.The processor's operating clock at 400MHz.The controlling system's main memory is a 64MB SDRAM with a 256MB flash-memory.Besides,an external high-capacity SD card data memory can be easily added.So the system can meet the requirements for data acquisition,data processing,data transmission,data storage,and so on. Both wired and wireless network can satisfy remote real-time monitoring, data transmission,system maintenance,status monitoring or updating software.Linux was embedded and multi-layer designed conception was used.The code, including sensor hardware driver,the data acquisition,earthquake setting out and so on,was written on medium layer.The hardware driver consist of IIC-Bus interface driver, IO driver and asynchronous notification driver. The

  8. Validation of Accelerometer Wear and Nonwear Time Classification Algorithm

    PubMed Central

    Choi, Leena; Liu, Zhouwen; Matthews, Charles E.; Buchowski, Maciej S.

    2011-01-01

    Introduction The use of movement monitors (accelerometers) for measuring physical activity (PA) in intervention and population-based studies is becoming a standard methodology for the objective measurement of sedentary and active behaviors and for validation of subjective PA self-reports. A vital step in PA measurements is classification of daily time into accelerometer wear and nonwear intervals using its recordings (counts) and an accelerometer-specific algorithm. Purpose To validate and improve a commonly used algorithm for classifying accelerometer wear and nonwear time intervals using objective movement data obtained in the whole-room indirect calorimeter. Methods We conducted a validation study of a wear/nonwear automatic algorithm using data obtained from 49 adults and 76 youth wearing accelerometers during a strictly monitored 24-h stay in a room calorimeter. The accelerometer wear and nonwear time classified by the algorithm was compared with actual wearing time. Potential improvements to the algorithm were examined using the minimum classification error as an optimization target. Results The recommended elements in the new algorithm are: 1) zero-count threshold during a nonwear time interval, 2) 90-min time window for consecutive zero/nonzero counts, and 3) allowance of 2-min interval of nonzero counts with the up/downstream 30-min consecutive zero counts window for detection of artifactual movements. Compared to the true wearing status, improvements to the algorithm decreased nonwear time misclassification during the waking and the 24-h periods (all P < 0.001). Conclusions The accelerometer wear/nonwear time algorithm improvements may lead to more accurate estimation of time spent in sedentary and active behaviors. PMID:20581716

  9. 9. Photocopy of engineering drawing (original drawing located in LBNL ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    9. Photocopy of engineering drawing (original drawing located in LBNL Building 90F Architecture and Engineering As-Built Collection). July, 1960. 4BOOQ002. QUADRANT MAP - University of California Radiation Laboratory, Bevatron, 1 Cyclotron Road, Berkeley, Alameda County, CA

  10. 180. Photocopy of drawing (1965 mechanical drawing by Koebig & ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    180. Photocopy of drawing (1965 mechanical drawing by Koebig & Koebig, Inc.) AIR CONDITIONING FOR THE MST, SHEET M-6 - Vandenberg Air Force Base, Space Launch Complex 3, Launch Pad 3 East, Napa & Alden Roads, Lompoc, Santa Barbara County, CA

  11. 37. Photocopy of engineering drawing (original drawing located in LBNL ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    37. Photocopy of engineering drawing (original drawing located in LBNL Building 90F Architecture and Engineering As-Built Collection). May, 1986. UNIVERSITY OF CALIFORNIA TOPOGRAPHIC MAP - University of California Radiation Laboratory, Bevatron, 1 Cyclotron Road, Berkeley, Alameda County, CA

  12. 254. Photocopy of drawing (1975 structural drawing by the Ralph ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    254. Photocopy of drawing (1975 structural drawing by the Ralph M. Parsons Company) FLAME DEFLECTOR FOR LAUNCHER, SHEET S-17 - Vandenberg Air Force Base, Space Launch Complex 3, Launch Pad 3 East, Napa & Alden Roads, Lompoc, Santa Barbara County, CA

  13. 2. Photocopy of measured drawing (original drawing in the possession ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    2. Photocopy of measured drawing (original drawing in the possession of Beinecke Rare Books Library, Yale University) Henry Austin, architect, 1850 NORTHEAST ELEVATION - Moses Yale Beach House, 86 North Main Street, Wallingford, New Haven County, CT

  14. 1. Photocopy of measured drawing (original drawing in the possession ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    1. Photocopy of measured drawing (original drawing in the possession of Beinecke Rare Books Library, Yale University) Henry Austin, architect, 1850 SOUTHEAST (FRONT) ELEVATION - Moses Yale Beach House, 86 North Main Street, Wallingford, New Haven County, CT

  15. Photographic copy of architectural drawing (original drawing located at the ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    Photographic copy of architectural drawing (original drawing located at the Panama Canal Commission Headquarters Building, Department of Engineering Vault, Balboa Heights, Republic of Panama), 1916. Side elevation - Balboa School, Northeast end of El Prado, Balboa, Former Panama Canal Zone, CZ

  16. 5. Photocopy of measured drawing (original drawing in the possession ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    5. Photocopy of measured drawing (original drawing in the possession of the Rigsarkivet (Royal Archives), Copenhagen, Denmark) Lieutenant Giellerup, delineator, May 1829 PLAN PROPOSED ALTERATIONS OF SECOND FLOOR OF GOVERNMENT HOUSE - Government House, King Street, Christiansted, St. Croix, VI

  17. 4. Photocopy of measured drawing (original drawing in the possession ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    4. Photocopy of measured drawing (original drawing in the possession of the Rigsarkivet (Royal Archives), Copenhagen, Denmark) Lieutenant Giellerup, delineator, May 1829 PROPOSED ALTERATIONS OF GOVERNMENT HOUSE - Government House, King Street, Christiansted, St. Croix, VI

  18. 6. Photocopy of measured drawing (original drawing in the possession ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    6. Photocopy of measured drawing (original drawing in the possession of the Rigsarkivet (Royal Archives), Copenhagen, Denmark) Ludvig Schellerup, architect, August 1864 PLAN OF GOVERNMENT HOUSE - Government House, King Street, Christiansted, St. Croix, VI

  19. Photographic copy of architectural drawing (original drawing located at the ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    Photographic copy of architectural drawing (original drawing located at the Real Property Office, Naval Base Rodman, Republic of Panama), 1940. Ground floor plan. - Fort Amador, Administration Building, Rear Admiral Nimitz Circle, Panama City, Former Panama Canal Zone, CZ

  20. Photographic copy of architectural drawing (original drawing located at the ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    Photographic copy of architectural drawing (original drawing located at the Real Property Office, Naval Base Rodman, Republic of Panama), 1940. Exterior Details - Fort Amador, Administration Building, Rear Admiral Nimitz Circle, Panama City, Former Panama Canal Zone, CZ

  1. Photographic copy of architectural drawing (original drawing located at the ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    Photographic copy of architectural drawing (original drawing located at the Real Property Office, Naval Base Rodman, Republic of Panama), 1941. First floor plan - Fort Amador, Four Apartments, Van Hook Place, Panama City, Former Panama Canal Zone, CZ

  2. Photographic copy of architectural drawing (original drawing located at the ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    Photographic copy of architectural drawing (original drawing located at the Real Property Office, Naval Base Rodman, Republic of Panama), 1940. Second floor plan. - Fort Amador, Administration Building, Rear Admiral Nimitz Circle, Panama City, Former Panama Canal Zone, CZ

  3. Photographic copy of architectural drawing (original drawing located at the ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    Photographic copy of architectural drawing (original drawing located at the Real Property Office, Naval Base Rodman, Republic of Panama), 1940. Exterior details - Fort Amador, Administration Building, Rear Admiral Nimitz Circle, Panama City, Former Panama Canal Zone, CZ

  4. Photographic copy of architectural drawing (original drawing located at the ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    Photographic copy of architectural drawing (original drawing located at the Real Property Office, Naval Rodman, Republic or Panama), 1940. Elevations. - Fort Amador, Administration Building, Rear Admiral Nimitz Circle, Panama City, Former Panama Canal Zone, CZ

  5. Photographic copy of architectural drawing (original drawing located at the ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    Photographic copy of architectural drawing (original drawing located at the Real Property Office, Naval Base Rodman, Republic of Panama), 1940. First floor plan. - Fort Amador, Administration Building, Rear Admiral Nimitz Circle, Panama City, Former Panama Canal Zone, CZ

  6. Photographic copy of architectural drawing (original drawing located at the ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    Photographic copy of architectural drawing (original drawing located at the Real Property Office, Naval Base Rodman, Republic of Panama), 1940) Toilet plans - Fort Amador, Administration Building, Rear Admiral Nimitz Circle, Panama City, Former Panama Canal Zone, CZ

  7. Photographic copy of architectural drawing (original drawing located at the ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    Photographic copy of architectural drawing (original drawing located at the Real Property Office, Naval Base Rodman, Republic of Panama), 1940. Details of toilets - Fort Amador, Administration Building, Rear Admiral Nimitz Circle, Panama City, Former Panama Canal Zone, CZ

  8. Photographic copy of architectural drawing (original drawing located at the ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    Photographic copy of architectural drawing (original drawing located at the Real Property Office, Naval Base Rodman, Republic of Panama), 1941. Basement floor plan. - Fort Amador, Four Apartments, Van Hook Place, Panama City, Former Panama Canal Zone, CZ

  9. Photographic copy of architectural drawing (original drawing located at the ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    Photographic copy of architectural drawing (original drawing located at the Real Property Office, Naval Base Rodman, Republic of Panama), 1940. Sections - Fort Amador, Administration Building, Rear Admiral Nimitz Circle, Panama City, Former Panama Canal Zone, CZ

  10. Photographic copy of architectural drawing (original drawing located at the ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    Photographic copy of architectural drawing (original drawing located at the Real Property Office, Naval Base Rodman, Republic of Panama), 1941. Elevation and section - Fort Amador, Four Apartments, Van Hook Place, Panama City, Former Panama Canal Zone, CZ

  11. 28. Photocopy of drawing, Draw for L Street Bridge, Sheet ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    28. Photocopy of drawing, Draw for L Street Bridge, Sheet 6: Girder C, July 1892. City of Boston Public Works Department Bridge files. - Summer Street Bridge, Spanning Reserved Channel, Boston, Suffolk County, MA

  12. 26. Photocopy of drawing, Draw for L Street Bridge, Sheet ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    26. Photocopy of drawing, Draw for L Street Bridge, Sheet 4: Girder D, Girder F, July 1892. City of Boston Public Works Department Bridge files. - Summer Street Bridge, Spanning Reserved Channel, Boston, Suffolk County, MA

  13. 29. Photocopy of drawing, Draw for L Street Bridge, Sheet ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    29. Photocopy of drawing, Draw for L Street Bridge, Sheet 7: Girder D, July 1892. City of Boston Public Works Department Bridge files. - Summer Street Bridge, Spanning Reserved Channel, Boston, Suffolk County, MA

  14. 31. Photocopy of drawing, Draws for L Street Bridge, Main ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    31. Photocopy of drawing, Draws for L Street Bridge, Main Trucks, August 1892. City of Boston Public Works Department Bridge files. - Summer Street Bridge, Spanning Reserved Channel, Boston, Suffolk County, MA

  15. 25. Photocopy of drawing, Draw for L Street Bridge, Sheet ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    25. Photocopy of drawing, Draw for L Street Bridge, Sheet 3: Girder A, July 1892. City of Boston Public Works Department Bridge files. - Summer Street Bridge, Spanning Reserved Channel, Boston, Suffolk County, MA

  16. 23. Photocopy of drawing, Draw for L Street Bridge, Sheet ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    23. Photocopy of drawing, Draw for L Street Bridge, Sheet 1: Plan and Elevation, July 1892. City of Boston Public Works Department Bridge files. - Summer Street Bridge, Spanning Reserved Channel, Boston, Suffolk County, MA

  17. 30. Photocopy of drawing, Draw for L Street Bridge, Sheet ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    30. Photocopy of drawing, Draw for L Street Bridge, Sheet 8: Samson Posts, Truck Rockers, Portal Struts, July 1892. City of Boston Public Works Department Bridge files. - Summer Street Bridge, Spanning Reserved Channel, Boston, Suffolk County, MA

  18. 24. Photocopy of drawing, Draw for L Street Bridge, Sheet ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    24. Photocopy of drawing, Draw for L Street Bridge, Sheet 2: Floor Beams, July 1982. City of Boston Public Works Department Bridge files. - Summer Street Bridge, Spanning Reserved Channel, Boston, Suffolk County, MA

  19. 27. Photocopy of drawing, Draw for L Street Bridge, Sheet ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    27. Photocopy of drawing, Draw for L Street Bridge, Sheet 5: Girder E, July 1892. City of Boston Public Works Department Bridge files. - Summer Street Bridge, Spanning Reserved Channel, Boston, Suffolk County, MA

  20. 86. Photocopy of drawing (February 1994 architectural drawing by Stevens ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    86. Photocopy of drawing (February 1994 architectural drawing by Stevens & Wilkinson, original in possession of Stevens & Wilkinson, Atlanta, George). Rich's Department Store, Atlanta, Georgia, ground floor plan 1924 building. - Rich's Downtown Department Store, 45 Broad Street, Atlanta, Fulton County, GA

  1. 5. Photograph of extant ink on linen drawings (original drawings ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    5. Photograph of extant ink on linen drawings (original drawings held in the vault of the Office of the State Architect in Sacramento) FIRST FLOOR FRAMING PLAN, AUGUST 1922 - California State Printing Office, 1020 O Street, Sacramento, Sacramento County, CA

  2. 6. Photograph of extant ink on linen drawings (original drawings ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    6. Photograph of extant ink on linen drawings (original drawings held in the vault of the Office of the State Architect in Sacramento) SECOND FLOOR FRAMING PLAN, AUGUST 1922 - California State Printing Office, 1020 O Street, Sacramento, Sacramento County, CA

  3. 18. Photograph of Original Drawing of Revolving Car Dumper, Drawing ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    18. Photograph of Original Drawing of Revolving Car Dumper, Drawing No. 9-22, dated 4/19/56 (original in possession of CSX Transportation, Inc.) - Port Covington Terminal, Coal Pier No. 4, Baltimore, Independent City, MD

  4. Photographic copy of architectural drawing (original drawing located at the ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    Photographic copy of architectural drawing (original drawing located at the Panama Canal Commission Headquarters Building, Department of Engineering Vault, Balboa Heights, Republic of Panama). Left side elevation. - Quarry Heights, Officers' Quarters, Parkinson Lane, Balboa, Former Panama Canal Zone, CZ

  5. Photographic copy of architectural drawing (original drawing located at the ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    Photographic copy of architectural drawing (original drawing located at the Panama Canal Commission Headquarters Building, Department of Engineering Vault, Balboa Heights, Republic of Panama). Rear elevation. - Quarry Heights, Officers' Quarters, Parkinson Lane, Balboa, Former Panama Canal Zone, CZ

  6. Photographic copy of architectural drawing (original drawing located at the ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    Photographic copy of architectural drawing (original drawing located at the Panama Canal Commission Headquarters Building, Department of Engineering Vault, Balboa Heights, Republic of Panama). Longitudinal section. - Quarry Heights, Officers' Quarters, Parkinson Lane, Balboa, Former Panama Canal Zone, CZ

  7. Photographic copy of architectural drawing (original drawing located at the ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    Photographic copy of architectural drawing (original drawing located at the Panama Canal Commission Headquarters Building, Department of Engineering Vault, Balboa Heights, Republic of Panama). Second floor plan. - Quarry Heights, Officers' Quarters, Parkinson Lane, Balboa, Former Panama Canal Zone, CZ

  8. Photographic copy of architectural drawing (original drawing located at the ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    Photographic copy of architectural drawing (original drawing located at the Panama Canal Commission Headquarters Building, Department of Engineering Vault, Balboa Heights, Republic of Panama). Front elevation. - Quarry Heights, Officers' Quarters, Parkinson Lane, Balboa, Former Panama Canal Zone, CZ

  9. Photographic copy of architectural drawing (original drawing located at the ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    Photographic copy of architectural drawing (original drawing located at the Panama Canal Commission Headquarters Building, Department of Engineering Vault, Balboa Heights, Republic of Panama). First floor plan. - Quarry Heights, Officers' Quarters, Parkinson Lane, Balboa, Former Panama Canal Zone, CZ

  10. Photographic copy of architectural drawing (original drawing located at the ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    Photographic copy of architectural drawing (original drawing located at the Panama Canal Commission Headquarters Building, Department of Engineering Vault, Balboa Heights, Republic of Panama), Right side elevation. - Quarry Heights, Officers' Quarters, Parkinson Lane, Balboa, Former Panama Canal Zone, CZ

  11. 20. Photocopy of drawing (1961 mechanical drawing by Kaiser Engineers) ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    20. Photocopy of drawing (1961 mechanical drawing by Kaiser Engineers) ELECTRICAL LAYOUTS FOR VEHICLE SUPPORT BUILDING, SHEET E-2 - Vandenberg Air Force Base, Space Launch Complex 3, Vehicle Support Building, Napa & Alden Roads, Lompoc, Santa Barbara County, CA

  12. 19. Photocopy of drawing (1961 piping drawing by Kaiser Engineers) ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    19. Photocopy of drawing (1961 piping drawing by Kaiser Engineers) PIPING PLANS AND DETAILS FOR VEHICLE SUPPORT BUILDING, SHEET P-1 - Vandenberg Air Force Base, Space Launch Complex 3, Vehicle Support Building, Napa & Alden Roads, Lompoc, Santa Barbara County, CA

  13. 110. Photographic copy of drawing (1905, original drawing in Archives, ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    110. Photographic copy of drawing (1905, original drawing in Archives, Office of the Building, Administration Building, Sears, Roebuck and Company Mail Order Plant, Chicago, Illinois). Nimmons and Fellows. 1/8 inch to one foot. Drawings for the first addition to Annex B. This drawing excerpted from blueprint set. SOUTH ELEVATION (ANNEX B, BAYS P AND Q, FOR FLOORS FOUR THROUGH NINE) - Sears Roebuck & Company Mail Order Plant, Merchandise Building, 924 South Homan Avenue, Chicago, Cook County, IL

  14. 93. Photographic copy of drawing (February 1905, original drawing in ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    93. Photographic copy of drawing (February 1905, original drawing in Archives, Public Affairs Department, Sears Merchandise Group, Hoffman Estates, Illinois). Nimmons and Fellows. 1/8 inch to one foot. Partial elevation drawing of the first four bays west of Homan Avenue. This drawing is excerpted from a blueprint set. NORTH ELEVATION - Sears Roebuck & Company Mail Order Plant, Merchandise Building, 924 South Homan Avenue, Chicago, Cook County, IL

  15. 15. Photocopy of drawing (1958 architectural drawing by Ralph M. ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    15. Photocopy of drawing (1958 architectural drawing by Ralph M. Parsons Company. Original drawing in possession of Vandenberg Air Force Base Civil Engineering Office). SITE PLAN FOR POINT ARGUELLO LAUNCH COMPLEX 1 (SLC-3) SHOWING POTENTIAL SITES OF FUTURE PADS. - Vandenberg Air Force Base, Space Launch Complex 3, Napa & Alden Roads, Lompoc, Santa Barbara County, CA

  16. 23. Photographic copy of construction drawing 1985 (original drawing located ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    23. Photographic copy of construction drawing 1985 (original drawing located in Building 301, Offutt AFB, Bellevue, Nebraska). Elevation drawings of nose dock nos. 491, 492, and 493. - Offutt Air Force Base, Looking Glass Airborne Command Post, Nose Docks, On either side of Hangar Access Apron at Northwest end of Project Looking Glass Historic District, Bellevue, Sarpy County, NE

  17. Photocopy of drawing (original drawing of Fire and Guard House ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    Photocopy of drawing (original drawing of Fire and Guard House with Communication Center in possession of MacDill Air Force Base, Civil Engineering, Tampa, Florida; 1940 architectural drawings by Construction Division, Office of the Quartermaster General) ELEVATIONS AND SECTIONS - MacDill Air Force Base, Fire & Guard House, 2709 Florida Keys Avenue, Tampa, Hillsborough County, FL

  18. Photocopy of drawing (original drawing of Fire and Guard House ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    Photocopy of drawing (original drawing of Fire and Guard House with Communication Center in possession of MacDill Air Force Base, Civil Engineering, Tampa, Florida; 1940 architectural drawings by Construction Division, Office of the Quartermaster General) FRONT ELEVATION DETAILS - MacDill Air Force Base, Fire & Guard House, 2709 Florida Keys Avenue, Tampa, Hillsborough County, FL

  19. Photocopy of drawing (original drawing of Fire and Guard House ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    Photocopy of drawing (original drawing of Fire and Guard House with Communication Center in possession of MacDill Air Force Base, Civil Engineering, Tampa, Florida; 1940 architectural drawings by Construction Division, Office of the Quartermaster General) FIRST AND SECOND FLOOR AND ROOF PLANS - MacDill Air Force Base, Fire & Guard House, 2709 Florida Keys Avenue, Tampa, Hillsborough County, FL

  20. Photocopy of drawing (original drawing of Fire and Guard House ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    Photocopy of drawing (original drawing of Fire and Guard House with Communication Center in possession of MacDill Air Force Base, Civil Engineering, Tampa, Florida; 1940 architectural drawings by Construction Division, Office of the Quartermaster General) EXTERIOR AND MISCELLANEOUS DETAILS - MacDill Air Force Base, Fire & Guard House, 2709 Florida Keys Avenue, Tampa, Hillsborough County, FL

  1. 107. Photographic copy of drawing (1905, original drawing in Archives, ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    107. Photographic copy of drawing (1905, original drawing in Archives, Office of the Building, Administration Building, Sears, Roebuck and Company Mail Order Plant, Chicago, Illinois). Nimmons and Fellows. 1/2 inch to one foot. Large scale drawings of elevation details. DETAIL ELEVATIONS - ANNEX A AND ANNEX B - Sears Roebuck & Company Mail Order Plant, Merchandise Building, 924 South Homan Avenue, Chicago, Cook County, IL

  2. 18. Photocopy of drawing (May 24, 1939 architectural drawing by ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    18. Photocopy of drawing (May 24, 1939 architectural drawing by Heintz, Adler & Schutze, in possession of the Atlanta Housing Authority). Floor plans, Type A, D and H buildings. Drawing No. A-20. - Clark Howell Homes, Building 12-B, 516 Lovejoy Street, Atlanta, Fulton County, GA

  3. Photocopy of drawing (November, 1934 Architectural Drawings by Burge and ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    Photocopy of drawing (November, 1934 Architectural Drawings by Burge and Stevens Architects, in possession of the Atlanta Housing Authority, Atlanta, GA) TYPICAL TYPE "A" AND TYPE "C" APARTMENT UNIT STAIRWELL DRAWINGS, SECTIONS AND ELEVATIONS. - Techwood Homes (Public Housing), Bounded by North Avenue, Parker Street, William Street & Lovejoy Street, Atlanta, Fulton County, GA

  4. Photocopy of drawing (November, 1934 Architectural Drawings by Burge and ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    Photocopy of drawing (November, 1934 Architectural Drawings by Burge and Stevens Architects, in possession of the Atlanta Housing Authority, Atlanta, GA) PLOT PLANS SHOWING STREETS AND SIDEWALKS. DRAWING NO. A-2. - Techwood Homes (Public Housing), Bounded by North Avenue, Parker Street, William Street & Lovejoy Street, Atlanta, Fulton County, GA

  5. Photocopy of drawing (November, 1934 Architectural Drawings by Burge and ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    Photocopy of drawing (November, 1934 Architectural Drawings by Burge and Stevens Architects, in possession of the Atlanta Housing Authority, Atlanta, GA) FLOOR PLANS, TYPE "A" AND "B" APARTMENTS. DRAWING NO. A-52 - Techwood Homes (Public Housing), Bounded by North Avenue, Parker Street, William Street & Lovejoy Street, Atlanta, Fulton County, GA

  6. Photocopy of drawing (September, 1935 Architectural Drawings by Burge and ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    Photocopy of drawing (September, 1935 Architectural Drawings by Burge and Stevens Architects, in possession of the Atlanta Housing Authority, Atlanta, GA) TITLE SHEET. DRAWING NO. H.D. 96 - Techwood Homes (Public Housing), Bounded by North Avenue, Parker Street, William Street & Lovejoy Street, Atlanta, Fulton County, GA

  7. Photocopy of drawing (November, 1934 Architectural Drawings by Burge and ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    Photocopy of drawing (November, 1934 Architectural Drawings by Burge and Stevens Architects, in possession of the Atlanta Housing Authority, Atlanta, GA) WINDOW, DOOR, AND INTERIOR FINISH SCHEDULES. DRAWING NO. A-56 - Techwood Homes (Public Housing), Bounded by North Avenue, Parker Street, William Street & Lovejoy Street, Atlanta, Fulton County, GA

  8. Photocopy of drawing (original drawing of War Department Theater in ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    Photocopy of drawing (original drawing of War Department Theater in possession of MacDill Air Force Base, Civil Engineering, Tampa, Florida; 1940 architectural drawings by Construction Division, Office of the Quartermaster General) FLOOR PLAN AND BENCH DETAILS - MacDill Air Force Base, Base Theater, 2420 Florida Keys Avenue, Tampa, Hillsborough County, FL

  9. Photocopy of drawing (original drawing of War Department Theater in ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    Photocopy of drawing (original drawing of War Department Theater in possession of MacDill Air Force Base, Civil Engineering, Tampa, Florida; 1940 architectural drawings by Construction Division, Office of the Quartermaster General) EXTERIOR ELEVATIONS - MacDill Air Force Base, Base Theater, 2420 Florida Keys Avenue, Tampa, Hillsborough County, FL

  10. Photocopy of drawing (original drawing of War Department Theater in ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    Photocopy of drawing (original drawing of War Department Theater in possession of MacDill Air Force Base, Civil Engineering, Tampa, Florida; 1940 architectural drawings by Construction Division, Office of the Quartermaster General) FIRST FLOOR AND CEILING PLAN - MacDill Air Force Base, Base Theater, 2420 Florida Keys Avenue, Tampa, Hillsborough County, FL

  11. Photocopy of drawing (original drawing of War Department Theater in ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    Photocopy of drawing (original drawing of War Department Theater in possession of MacDill Air Force Base, Civil Engineering, Tampa, Florida; 1940 architectural drawings by Construction Division, Office of the Quartermaster General)STRUCTURAL - FOUNDATIONS - MacDill Air Force Base, Base Theater, 2420 Florida Keys Avenue, Tampa, Hillsborough County, FL

  12. 89. Photocopy of drawing (October 1950 architectural drawing by Stevens ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    89. Photocopy of drawing (October 1950 architectural drawing by Stevens & Wilkinson, original in possession of Stevens & Wilkinson, Atlanta, Georgia). Front elevation (Broad Street), additions and alterations to Rich's Inc., drawing no. A-6. - Rich's Downtown Department Store, 45 Broad Street, Atlanta, Fulton County, GA

  13. 94. Photocopy of drawing (December 1960 architectural drawing by Stevens ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    94. Photocopy of drawing (December 1960 architectural drawing by Stevens & Wilkinson, original in possession of Stevens & Wilkinson, Atlanta, Georgia). Second floor plan, parking garage for Rich's Inc., drawing no. A4-14. - Rich's Downtown Department Store, 45 Broad Street, Atlanta, Fulton County, GA

  14. 88. Photocopy of drawing (October 1950 architectural drawing by Stevens ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    88. Photocopy of drawing (October 1950 architectural drawing by Stevens & Wilkinson, original in possession of Stevens & Wilkinson, Atlanta, Georgia). First floor plan, additions and alterations to Rich's Inc., drawing no. A-3. - Rich's Downtown Department Store, 45 Broad Street, Atlanta, Fulton County, GA

  15. 98. Photocopy of drawing (February 1962 architectural drawing by Stevens ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    98. Photocopy of drawing (February 1962 architectural drawing by Stevens & Wilkinson, original in possession of Stevens & Wilkinson, Atlanta, Georgia). Floor plans, elevations, door types, door details, Rich's downtown garden addition, drawing no. A-1. - Rich's Downtown Department Store, 45 Broad Street, Atlanta, Fulton County, GA

  16. 90. Photocopy of drawing (October 1950 architectural drawing by Stevens ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    90. Photocopy of drawing (October 1950 architectural drawing by Stevens & Wilkinson, original in possession of Stevens & Wilkinson, Atlanta, Georgia). Cross section B-B, additions and alterations to Rich's Inc., drawing no. A-8. - Rich's Downtown Department Store, 45 Broad Street, Atlanta, Fulton County, GA

  17. 95. Photocopy of drawing (December 1960 architectural drawing by Stevens ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    95. Photocopy of drawing (December 1960 architectural drawing by Stevens & Wilkinson, original in possession of Stevens & Wilkins, Atlanta, Georgia). Elevators, parking garage for Rich's, Inc., drawing no. A9-14. - Rich's Downtown Department Store, 45 Broad Street, Atlanta, Fulton County, GA

  18. 97. Photocopy of drawing (December 1962 architectural drawing by Stevens ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    97. Photocopy of drawing (December 1962 architectural drawing by Stevens & Wilkinson, original in possession of Stevens & Wilkinson, Atlanta, Georgia). First floor plan (and site plan), parking garage addition for Rich's Inc., drawing no. A2-8. - Rich's Downtown Department Store, 45 Broad Street, Atlanta, Fulton County, GA

  19. 92. Photocopy of drawing (April 1951 architectural drawing by Stevens ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    92. Photocopy of drawing (April 1951 architectural drawing by Stevens & Wilkinson, original in possession of Stevens & Wilkinson, Atlanta, Georgia). Fifth floor plan, additions and alterations to Rich's, Inc., drawing no. A-24. - Rich's Downtown Department Store, 45 Broad Street, Atlanta, Fulton County, GA

  20. 91. Photocopy of drawing (October 1950 architectural drawing by Stevens ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    91. Photocopy of drawing (October 1950 architectural drawing by Stevens & Wilkinson, original in possession of Stevens & Wilkinson, Atlanta, Georgia). Broad Street entrance and stairs, additions and alterations to Rich's Inc., drawing no. A-10. - Rich's Downtown Department Store, 45 Broad Street, Atlanta, Fulton County, GA

  1. 96. Photocopy of drawing (December 1960 architectural drawing by Stevens ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    96. Photocopy of drawing (December 1960 architectural drawing by Stevens & Wilkinson, original in possession of Stevens & Wilkinson, Atlanta, Georgia). Sections and elevations, parking garage for Rich's Inc., drawing no. A10-14. - Rich's Downtown Department Store, 45 Broad Street, Atlanta, Fulton County, GA

  2. 93. Photocopy of drawing (December 1960 architectural drawing by Stevens ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    93. Photocopy of drawing (December 1960 architectural drawing by Stevens & Wilkinson, original in possession of Stevens & Wilkinson, Atlanta, Georgia). First floor plan, parking garage for Rich's Inc., drawing no. A3-14. - Rich's Downtown Department Store, 45 Broad Street, Atlanta, Fulton County, GA

  3. 87. Photocopy of drawing (October 1950 architectural drawing by Stevens ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    87. Photocopy of drawing (October 1950 architectural drawing by Stevens & Wilkinson, original in possession of Stevens & Wilkinson, Atlanta, Georgia). Basement floor plan, additions and alterations to Rich's, Inc., drawing no. !-2. - Rich's Downtown Department Store, 45 Broad Street, Atlanta, Fulton County, GA

  4. 95. Photographic copy of drawing (February 1905, original drawing in ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    95. Photographic copy of drawing (February 1905, original drawing in Archives, Public Affairs Department, Sears Merchandise Group, Hoffman Estates, Illinois). Nimmons and Fellows. 1/8 inch to one foot. Main elevation along Homan Avenue, including the tower. This drawing is excerpted from a blueprint set. EAST ELEVATION - Sears Roebuck & Company Mail Order Plant, Merchandise Building, 924 South Homan Avenue, Chicago, Cook County, IL

  5. Photocopy of drawing (original drawing of Fire and Guard House ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    Photocopy of drawing (original drawing of Fire and Guard House with Communication Center in possession of MacDill Air Force Base, Civil Engineering, Tampa, Florida; 1940 architectural drawings by Construction Division, Office of the Quartermaster General) CELL BLOCK DETAILS - MacDill Air Force Base, Fire & Guard House, 2709 Florida Keys Avenue, Tampa, Hillsborough County, FL

  6. Photocopy of drawing (original drawing of Sewage Treatment Plant ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    Photocopy of drawing (original drawing of Sewage Treatment Plant - No. 1 Pump House in possession of MacDill Air Force Base, Civil Engineering, Tampa, Florida; 1940 architectural drawings by Construction Division, Office of the Quartermaster General) ELEVATIONS, SECTIONS, AND DETAILS - MacDill Air Force Base, Pump House No. 1, Hillsborough Garden Drive & Tampa Boulevard, Tampa, Hillsborough County, FL

  7. Photocopy of drawing (original drawing of Sewage Treatment Plant ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    Photocopy of drawing (original drawing of Sewage Treatment Plant - No. 1 Pump House in possession of MacDill Air Force Base, Civil Engineering, Tampa, Florida; 1940 architectural drawings by Construction Division, Office of the Quartermaster General) FLOOR PLANS AND SECTIONS - MacDill Air Force Base, Pump House No. 1, Hillsborough Garden Drive & Tampa Boulevard, Tampa, Hillsborough County, FL

  8. Characterization of a MEMS Accelerometer for Inertial Navigating Applications

    SciTech Connect

    Kinney, R.D.

    1999-02-12

    Inertial MEMS sensors such as accelerometers and angular rotation sensing devices continue to improve in performance as advances in design and processing are made. Present state-of-the-art accelerometers have achieved performance levels in the laboratory that are consistent with requirements for successful application in tactical weapon navigation systems. However, sensor performance parameters that are of interest to the designer of inertial navigation systems are frequently not adequately addressed by the MEMS manufacturer. This paper addresses the testing and characterization of a MEMS accelerometer from an inertial navigation perspective. The paper discusses test objectives, data reduction techniques and presents results from the test of a three-axis MEMS accelerometer conducted at Sandia National Laboratories during 1997. The test was structured to achieve visibility and characterization of the accelerometer bias and scale factor stability overtime and temperature. Sandia is a multi-program laboratory operated by Sandia Corporation, a Lockheed Martin Company, for the US Department of Energy under contract DE-AC04-94AL85000.

  9. Optimal Placement of Accelerometers for the Detection of Everyday Activities

    PubMed Central

    Cleland, Ian; Kikhia, Basel; Nugent, Chris; Boytsov, Andrey; Hallberg, Josef; Synnes, Kåre; McClean, Sally; Finlay, Dewar

    2013-01-01

    This article describes an investigation to determine the optimal placement of accelerometers for the purpose of detecting a range of everyday activities. The paper investigates the effect of combining data from accelerometers placed at various bodily locations on the accuracy of activity detection. Eight healthy males participated within the study. Data were collected from six wireless tri-axial accelerometers placed at the chest, wrist, lower back, hip, thigh and foot. Activities included walking, running on a motorized treadmill, sitting, lying, standing and walking up and down stairs. The Support Vector Machine provided the most accurate detection of activities of all the machine learning algorithms investigated. Although data from all locations provided similar levels of accuracy, the hip was the best single location to record data for activity detection using a Support Vector Machine, providing small but significantly better accuracy than the other investigated locations. Increasing the number of sensing locations from one to two or more statistically increased the accuracy of classification. There was no significant difference in accuracy when using two or more sensors. It was noted, however, that the difference in activity detection using single or multiple accelerometers may be more pronounced when trying to detect finer grain activities. Future work shall therefore investigate the effects of accelerometer placement on a larger range of these activities. PMID:23867744

  10. Online dynamic graph drawing.

    PubMed

    Frishman, Yaniv; Tal, Ayellet

    2008-01-01

    This paper presents an algorithm for drawing a sequence of graphs online. The algorithm strives to maintain the global structure of the graph and thus the user's mental map, while allowing arbitrary modifications between consecutive layouts. The algorithm works online and uses various execution culling methods in order to reduce the layout time and handle large dynamic graphs. Techniques for representing graphs on the GPU allow a speedup by a factor of up to 17 compared to the CPU implementation. The scalability of the algorithm across GPU generations is demonstrated. Applications of the algorithm to the visualization of discussion threads in Internet sites and to the visualization of social networks are provided.

  11. Drawing with a Single Line.

    ERIC Educational Resources Information Center

    Johnson, Carole Austen; Anderson, Lorraine

    1979-01-01

    Described is a method of tapping students' creative potential in art: the Spontaneous Response Drawing. SRD consists of drawing with a single line, usually with crayons or colored felt tip pens on a large sheet of paper. (KC)

  12. 111. Photographic copy of drawing (1905, original drawing in Archives, ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    111. Photographic copy of drawing (1905, original drawing in Archives, Office of the Building, Administration Building, Sears, Roebuck and Company Mail Order Plant, Chicago, Illinois). Nimmons and Fellows. 1/8 inch to one foot. Drawings for the first addition to Annex A. This drawing excerpted from blueprint set in Sears drawing archive. WEST ELEVATION AND TRANSVERSE SECTION (ANNEX A, BAYS P AND Q, FOR FLOORS FOUR THROUGH NINE) - Sears Roebuck & Company Mail Order Plant, Merchandise Building, 924 South Homan Avenue, Chicago, Cook County, IL

  13. [Teenagers' drawings in transcultural consultations].

    PubMed

    Simon, Amalini; Titia Rizzi, Alice

    The place of teenagers' drawings has been studied as part of a transcultural consultation, based on the creativity of the children of migrants. When speaking is difficult, drawings enable teenagers to show another dimension of their internal world. Aravin, a young Tamil boy, who lacked the necessary words, was able to express all the complexity of his thoughts through his drawings, finally being able to formulate in the group the difficult situations which he was drawing.

  14. Czech Children's Drawing of Nature

    ERIC Educational Resources Information Center

    Yilmaz, Zuhal; Kubiatko, Milan; Topal, Hatice

    2012-01-01

    Do world children draw nature pictures in a certain way? Range of mountains in the background, a sun, couple clouds, a river rising from mountains. Is this type of drawing universal in the way these nature items are organized on a drawing paper? The sample size from Czech Republic included 33 participants from two kindergartens. They were 5 and 6…

  15. A Right Brain Drawing Study.

    ERIC Educational Resources Information Center

    Taylor, Lucy E.

    This study was done to see if sixth grade students could improve their drawing abilities by looking at lines more abstractly--by drawing a picture viewing the original upside down and comparing it to the same student's drawing done viewing the original right side up. Pairs of works were scored on the basis of line quality, proportion, and likeness…

  16. Drawing the Sense of Touch.

    ERIC Educational Resources Information Center

    Kaupelis, Robert

    1984-01-01

    Techniques to help students do modeled drawings using Conte crayon or chalk are presented. Students must imagine that the crayon is actually touching the form they are drawing, pressing lightly on sections closest to them, and increasing the pressure to create darker tones as they draw the parts farther away. (RM)

  17. The ISA accelerometer for BepiColombo mission .

    NASA Astrophysics Data System (ADS)

    Iafolla, V.; Fiorenza, E.; Lefevre, C.; Nozzoli, S.; Peron, R.; Reale, A.; Santoli, F.

    The Italian Spring Accelerometer (ISA) will give a fundamental contribution to the Radio Science Experiments of BepiColombo mission, enabling substantial improvement of the knowledge of Mercury's orbit and rotation, and of the relativistic dynamics in the solar system. ISA is a three-axis accelerometer devoted to the measurement of the non-gravitational acceleration of Mercury Planetary Orbiter (MPO), whose knowledge is important in order to fully exploit the quality of the tracking data. ISA shall have an intrinsic noise level of (10^{-9} m/s^2/&sqrt;{Hz}) in the (3 \\cdot 10^{-5}) Hz to (10^{-1}) Hz frequency range, to guarantee the fulfilment of the RSE scientific goals. A comprehensive presentation of ISA accelerometer is given, including details about its scientific and technological features, the updated measurement error budget, the ongoing experimental activities and foreseen calibration and science operations strategies.

  18. Terrestrial Applications of a Nano-g Accelerometer

    NASA Technical Reports Server (NTRS)

    Hartley, Frank T.

    1996-01-01

    The ultra-sensitive accelerometer, developed for NASA to monitor the microgravity environments of Space Shuttle, five orbiters and Space Station, needed to measure accelerations up to 10 mg with an absolute accuracy of 10 nano-g (10(exp -8)g) for at least two orbits (10(exp 4) seconds) to resolve accelerations associated with orbital drag. Also, the accelerometers needed to have less than 10(exp -9) F.S. off-axis sensitivity; to be thermally and magnetically inert; to be immune to quiescent shock, and to have an in-situ calibration capability. Multi-axis compact seismometers, designs that have twelve decades of dynamic range will be described. Density profilometers, precision gradiometers, gyros and vibration isolation designs and applications will be discussed. Finally, examples of transformations of the accelerometer into sensitive anemometers and imaging spectrometers will be presented.

  19. Accelerometer Method and Apparatus for Integral Display and Control Functions

    NASA Technical Reports Server (NTRS)

    Bozeman, Richard J., Jr. (Inventor)

    1998-01-01

    Method and apparatus for detecting mechanical vibrations and outputting a signal in response thereto is discussed. An accelerometer package having integral display and control functions is suitable for mounting upon the machinery to be monitored. Display circuitry provides signals to a bar graph display which may be used to monitor machine conditions over a period of time. Control switches may be set which correspond to elements in the bar graph to provide an alert if vibration signals increase in amplitude over a selected trip point. The circuitry is shock mounted within the accelerometer housing. The method provides for outputting a broadband analog accelerometer signal, integrating this signal to produce a velocity signal, integrating and calibrating the velocity signal before application to a display driver, and selecting a trip point at which a digitally compatible output signal is generated.

  20. Thermospheric density and winds from GRACE accelerometer data

    NASA Astrophysics Data System (ADS)

    Cheng, Minkang; Tapley, Byron D.; Bettadpur, Srinivas; Ries, John C.

    The high-accuracy accelerometer data carried by the GRACE satellites represents the best measurements of the total surface forces acting on the spacecraft, including atmospheric drag, solar and earth radiation pressure. The GRACE accelerometer data are particularly well suited for exploring the variation in the thermospheric density and winds in response to changes in the solar and magnetic activity. In this study, the total atmospheric neutral density and winds are derived from analysis of the accelerometer data over a six-year period starting August 2002, which spans the complete range of solar activity. This paper will present the comparison of the six-year GRACE density with several density models, including DTM-78, NRLMSIS-00, JB2006 and HASDM. The GRACE-derived thermospheric winds will be compared with the HWM-93 model.

  1. Micromachined force-balance feedback accelerometer with optical displacement detection

    DOEpatents

    Nielson, Gregory N.; Langlois, Eric; Baker, Michael; Okandan, Murat; Anderson, Robert

    2014-07-22

    An accelerometer includes a proof mass and a frame that are formed in a handle layer of a silicon-on-an-insulator (SOI). The proof mass is separated from the frame by a back-side trench that defines a boundary of the proof mass. The accelerometer also includes a reflector coupled to a top surface of the proof mass. An optical detector is located above the reflector at the device side. The accelerometer further includes at least one suspension spring. The suspension spring has a handle anchor that extends downwards from the device side to the handle layer to mechanically support upward and downward movement of the proof mass relative to a top surface of the proof mass.

  2. Isolation of a piezoresistive accelerometer used in high acceleration tests

    SciTech Connect

    Bateman, V.I.; Brown, F.A.; Davie, N.T.

    1992-12-31

    Both uniaxial and triaxial shock isolation techniques for a piezoresistive accelerometer have been developed for pyroshock and impact tests. The uniaxial shock isolation technique has demonstrated acceptable characteristics for a temperature range of {minus}50{degree}F to +186{degree}F and a frequency bandwidth of DC to 10 kHz. The triaxial shock isolation technique has demonstrated acceptable results for a temperature range of {minus}50{degree}F to 70{degree}F and a frequency bandwidth of DC to 10 kHz. These temperature ranges, that are beyond the accelerometer manufacturer`s operational limits of {minus}30{degree}F and +150{degree}F, required the calibration of accelerometers at high shock levels and at the temperature extremes of {minus}50{degree}F and +160{degree}F. The purposes of these calibrations were to insure that the accelerometers operated at the field test temperatures and to provide an accelerometer sensitivity at each test temperature. Since there is no NIST-traceable (National Institute of Standards and Technology traceable) calibration capability at shock levels of 5,000 g - 15,000 g for the temperature extremes of {minus}50{degree}F and +160{degree}F, a method for calibrating and certifying the Hopkinson bar with a transfer standard was developed. Time domain and frequency domain results are given that characterize the Hopkinson bar. The NIST-traceable accuracy for the standard accelerometer in shock is {plus_minus}5%. The Hopkinson bar has been certified by the Sandia Secondary Standards Division with an uncertainty of 6%.

  3. Extracting Time-Accurate Acceleration Vectors From Nontrivial Accelerometer Arrangements.

    PubMed

    Franck, Jennifer A; Blume, Janet; Crisco, Joseph J; Franck, Christian

    2015-09-01

    Sports-related concussions are of significant concern in many impact sports, and their detection relies on accurate measurements of the head kinematics during impact. Among the most prevalent recording technologies are videography, and more recently, the use of single-axis accelerometers mounted in a helmet, such as the HIT system. Successful extraction of the linear and angular impact accelerations depends on an accurate analysis methodology governed by the equations of motion. Current algorithms are able to estimate the magnitude of acceleration and hit location, but make assumptions about the hit orientation and are often limited in the position and/or orientation of the accelerometers. The newly formulated algorithm presented in this manuscript accurately extracts the full linear and rotational acceleration vectors from a broad arrangement of six single-axis accelerometers directly from the governing set of kinematic equations. The new formulation linearizes the nonlinear centripetal acceleration term with a finite-difference approximation and provides a fast and accurate solution for all six components of acceleration over long time periods (>250 ms). The approximation of the nonlinear centripetal acceleration term provides an accurate computation of the rotational velocity as a function of time and allows for reconstruction of a multiple-impact signal. Furthermore, the algorithm determines the impact location and orientation and can distinguish between glancing, high rotational velocity impacts, or direct impacts through the center of mass. Results are shown for ten simulated impact locations on a headform geometry computed with three different accelerometer configurations in varying degrees of signal noise. Since the algorithm does not require simplifications of the actual impacted geometry, the impact vector, or a specific arrangement of accelerometer orientations, it can be easily applied to many impact investigations in which accurate kinematics need to

  4. Fabrication of a Miniaturized ZnO Nanowire Accelerometer and Its Performance Tests

    PubMed Central

    Kim, Hyun Chan; Song, Sangho; Kim, Jaehwan

    2016-01-01

    This paper reports a miniaturized piezoelectric accelerometer suitable for a small haptic actuator array. The accelerometer is made with zinc oxide (ZnO) nanowire (NW) grown on a copper wafer by a hydrothermal process. The size of the accelerometer is 1.5 × 1.5 mm2, thus fitting the 1.8 × 1.8 mm2 haptic actuator array cell. The detailed fabrication process of the miniaturized accelerometer is illustrated. Performance evaluation of the fabricated accelerometer is conducted by comparing it with a commercial piezoelectric accelerometer. The output current of the fabricated accelerometer increases linearly with the acceleration. The miniaturized ZnO NW accelerometer is feasible for acceleration measurement of small and lightweight devices. PMID:27649184

  5. Improved Signal Processing Technique Leads to More Robust Self Diagnostic Accelerometer System

    NASA Technical Reports Server (NTRS)

    Tokars, Roger; Lekki, John; Jaros, Dave; Riggs, Terrence; Evans, Kenneth P.

    2010-01-01

    The self diagnostic accelerometer (SDA) is a sensor system designed to actively monitor the health of an accelerometer. In this case an accelerometer is considered healthy if it can be determined that it is operating correctly and its measurements may be relied upon. The SDA system accomplishes this by actively monitoring the accelerometer for a variety of failure conditions including accelerometer structural damage, an electrical open circuit, and most importantly accelerometer detachment. In recent testing of the SDA system in emulated engine operating conditions it has been found that a more robust signal processing technique was necessary. An improved accelerometer diagnostic technique and test results of the SDA system utilizing this technique are presented here. Furthermore, the real time, autonomous capability of the SDA system to concurrently compensate for effects from real operating conditions such as temperature changes and mechanical noise, while monitoring the condition of the accelerometer health and attachment, will be demonstrated.

  6. A Basic Research for the Development and Evaluation of Novel MEMS Digital Accelerometers

    DTIC Science & Technology

    2013-02-01

    A, to the characteristic physical scale of the flow . In the case of accelerometer beam motion, the characteristic scale for the gas damping problem...and dynamic conditions encountered in the MEMS accelerometer. Typical ESBGK simulation results for the gas flow around the moving accelerometer beam... gas damping response have been compared with measurements of MEMS accelerometer beam closing and opening response done at various acceleration pulse

  7. 13. Photocopy of engineering drawing (original drawing,(original drawing, #MH 10460086, ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    13. Photocopy of engineering drawing (original drawing,(original drawing, #MH 104-600-86, dated October 31, 1995, and drawn by W. Robinson, is located in the Mountain Home Air Force Base Civil Engineering archives. This 1995 drawing is a copy of drawing #MH 104-600-06, dated December 21, 1955, entitled "Repair Exterior Siding Elev. & Exterior Painting. Bldg. 611," also located in the Mountain Home Air Force Base Civil Engineering archives). FAC 611. - Mountain Home Air Force Base, Base Chapel, 350 Willow Street, Cantonment Area, Mountain Home, Elmore County, ID

  8. 118. Photographic copy of drawing (undated, original drawing in Archives, ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    118. Photographic copy of drawing (undated, original drawing in Archives, Office of the Building, Administration Building, Sears, Roebuck and Company Mail Order Plant, Chicago, Illinois). Larsen-Wulff Architects. 1/16 inch to one foot. Drawing of the entire floor plan from Homan Avenue to Central Park Avenue, probably traced in the 1970's or early 1980's. FOURTH FLOOR PLAN - WEST HALF - Sears Roebuck & Company Mail Order Plant, Merchandise Building, 924 South Homan Avenue, Chicago, Cook County, IL

  9. 94. Photographic copy of drawing (February 1905, original drawing in ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    94. Photographic copy of drawing (February 1905, original drawing in Archives, Public Affairs Department, Office of the Building, Administration Building, Sears, Roebuck and Company Mail Order Plant, Chicago, Illinois). Nimmons and Fellows. 1/8 inch to one foot. Partial elevation drawing of the First four bays west of Homan Avenue. SOUTH ELEVATION - Sears Roebuck & Company Mail Order Plant, Merchandise Building, 924 South Homan Avenue, Chicago, Cook County, IL

  10. 121. Photographic copy of drawing (13 May 1905, original drawing ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    121. Photographic copy of drawing (13 May 1905, original drawing in ArchiveS, Office of the Building, Administration Building, Sears, Roebuck and Company Mail Order Plant, Chicago, Illinois). Adams and Schwab. 1/8 inch and 1/4 inch to one foot. Plan and section drawings for the installation and spiral chutes, includes structural framing details. DETAILS OF SPIRAL CONVEYORS IN MERCHANDISE BUILDING - Sears Roebuck & Company Mail Order Plant, Merchandise Building, 924 South Homan Avenue, Chicago, Cook County, IL

  11. 117. Photographic copy of drawing (undated, original drawing in Archives, ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    117. Photographic copy of drawing (undated, original drawing in Archives, Office of the Building, Administration Building, Sears, Roebuck and Company Mail Order Plant, Chicago, Illinois). Larsen-Wulff Architects. 1/16 inch to one foot. Drawing of the entire floor plan from Homan Avenue to Central Park Avenue, probably traced in the 1970's or early 1980's. FOURTH FLOOR PLAN - EAST HALF - Sears Roebuck & Company Mail Order Plant, Merchandise Building, 924 South Homan Avenue, Chicago, Cook County, IL

  12. 97. Photographic copy of drawing (14 February 1905, original drawing ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    97. Photographic copy of drawing (14 February 1905, original drawing in Archives, Office of the Building, Administration Building, Sears, Roebuck and Company Mail Order Plant, Chicago, Illinois). Nimmons and Fellows. 1/16 inch to one foot. Section drawings through the first four warehouse bays west of Homan Avenue. TRANSVERSE AND LONGITUDINAL SECTIONS - Sears Roebuck & Company Mail Order Plant, Merchandise Building, 924 South Homan Avenue, Chicago, Cook County, IL

  13. 108. Photographic copy of drawing (25 January 1910, original drawing ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    108. Photographic copy of drawing (25 January 1910, original drawing in Archives, Office of the Building, Administration Building, Sears, Roebuck and Company Mail Order Plant, Chicago, Illinois). Nimmons and Fellows. 1/8 inch to one foot. Floor plan for the first addition to Annex A. This drawing excerpted from blueprint set. FOURTH FLOOR PLAN (ANNEX A, BAYS J AND K, FOR FLOORS FOUR THROUGH NINE) - Sears Roebuck & Company Mail Order Plant, Merchandise Building, 924 South Homan Avenue, Chicago, Cook County, IL

  14. 109. Photographic copy of drawing (1905, original drawing in Archives, ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    109. Photographic copy of drawing (1905, original drawing in Archives, Office of the Building, Administration Building, Sears, Roebuck and Company Mail Order Plant, Chicago, Illinois). Nimmons and Fellows. 1/8 inch to one foot. Floor plan for the first addition to Annex B. This drawing excerpted from blueprint set. FOURTH FLOOR PLAN (ANNEX B, BAYS P AND Q, FOR FLOORTS FOUR THROUGH NINE) - Sears Roebuck & Company Mail Order Plant, Merchandise Building, 924 South Homan Avenue, Chicago, Cook County, IL

  15. 100. Photographic copy of drawing (February, 1905, original drawing in ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    100. Photographic copy of drawing (February, 1905, original drawing in Archives, Public Affairs Department, Sears Merchandise Group, Hoffman Estates, Illinois). Nimmons and Fellows. 1/2 inch to one foot. Large scale details for the north elevation. This drawing is excerpted from a blueprint set. DETAIL ELEVATIONS AND SECTIONS - Sears Roebuck & Company Mail Order Plant, Merchandise Building, 924 South Homan Avenue, Chicago, Cook County, IL

  16. 10. Photocopy of drawing. (This drawing is an 8' x ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    10. Photocopy of drawing. (This drawing is an 8' x 10' enlargement from a 4' x 5' negative; 1942 drawing titled: Mobilization Hospital Buildings, Type HSW-98, Standard Ward, First Floor Architectural Plan and First Floor Framing Plan,' Plan 800-1935, located at Directorate of Engineering and Housing, Fort McPherson.) - Fort McPherson, World War II Station Hospital, Hospital Wards, Anderson Way & Howe Street, Atlanta, Fulton County, GA

  17. Self-noise models of five commercial strong-motion accelerometers

    USGS Publications Warehouse

    Ringler, Adam; Evans, John R.; Hutt, Charles R.

    2015-01-01

    To better characterize the noise of a number of commonly deployed accelerometers in a standardized way, we conducted noise measurements on five different models of strong‐motion accelerometers. Our study was limited to traditional accelerometers (Fig. 1) and is in no way exhaustive.

  18. Single point optical calibration of accelerometers at NIST

    NASA Astrophysics Data System (ADS)

    Payne, Bev

    2006-06-01

    Typical accelerometer calibrations by laser interferometer are performed by measuring displacement at three places on the shaker table. Each of these measurements, made along the perimeter of the accelerometer, requires repositioning and realigning of the interferometer. This is done to approximate the actual displacement of the accelerometer. Using a dual-coil shaker with a small moving element and two coaxially-located and rigidly-attached mounting tables allows placing the accelerometer on one table and measuring displacement directly on the center axis of the second table. This was found to work effectively at lower frequencies, up to about 5 kHz, with mounting tables of conventional materials such as stainless steel. However, for higher frequencies the use of steel results in unwanted relative motion between the two mounting tables. Mounting tables of beryllium with nickel coating have been used at NIST to overcome this difficulty. This paper shows the calibration results of single point, on-axis measurements, using fringe counting and sine-approximation methods. The results compare favorably with three point measurements made by fringe disappearance using a conventional piezo-electric shaker at frequencies up to 15 kHz.

  19. High Sensitivity Optomechanical Reference Accelerometer over 10 kHz

    DTIC Science & Technology

    2014-06-05

    measurements and observations in seismology and gravimetry. 2 High sensitivity optomechanical reference accele Approved for public release; distribution is...and this category of accelerometers, outlining a path for high sensitivity reference acceleration measurements and observations in seismology and...Traditional applications require either high acceleration resolution, such as in gravimetry or seismology well below 100 Hz, or large bandwidths, as for

  20. Estimating Energy Expenditure with the RT3 Triaxial Accelerometer

    ERIC Educational Resources Information Center

    Maddison, Ralph; Jiang, Yannan; Vander Hoorn, Stephen; Mhurchu, Cliona Ni; Lawes, Carlene M. M.; Rodgers, Anthony; Rush, Elaine

    2009-01-01

    The RT3 is a relatively new triaxial accelerometer that has replaced the TriTrac. The aim of this study was to validate the RT3 against doubly labeled water (DLW) in a free-living, mixed weight sample of adults. Total energy expenditure (TEE) was measured over a 15-day period using DLW. Activity-related energy expenditure (AEE) was estimated by…

  1. An overview of the evolution of vibrating beam accelerometer technology

    NASA Astrophysics Data System (ADS)

    Norling, B. L.

    The history of vibrating beam accelerometers (VBA) is briefly outlined, and the current status of VBA technology is reviewed. In particular, attention is given to the VBA design fundamentals and the performance characteristics of several state-of-the-art VBA models. Finally, prospects for the future development of VBAs and the effect of VBA technology on the inertial navigation industry are discussed.

  2. Micromachined low frequency rocking accelerometer with capacitive pickoff

    DOEpatents

    Lee, Abraham P.; Simon, Jonathon N.; McConaghy, Charles F.

    2001-01-01

    A micro electro mechanical sensor that uses capacitive readout electronics. The sensor involves a micromachined low frequency rocking accelerometer with capacitive pickoff fabricated by deep reactive ion etching. The accelerometer includes a central silicon proof mass, is suspended by a thin polysilicon tether, and has a moving electrode (capacitor plate or interdigitated fingers) located at each end the proof mass. During movement (acceleration), the tethered mass moves relative to the surrounding packaging, for example, and this defection is measured capacitively by a plate capacitor or interdigitated finger capacitor, having the cooperating fixed electrode (capacitor plate or interdigitated fingers) positioned on the packaging, for example. The micromachined rocking accelerometer has a low frequency (<500 Hz), high sensitivity (.mu.G), with minimal power usage. The capacitors are connected to a power supply (battery) and to sensor interface electronics, which may include an analog to digital (A/D) converter, logic, RF communication link, antenna, etc. The sensor (accelerometer) may be, for example, packaged along with the interface electronics and a communication system in a 2".times.2".times.2" cube. The proof mass may be asymmetric or symmetric. Additional actuating capacitive plates may be used for feedback control which gives a greater dynamic range.

  3. GPS-Based Reduced Dynamic Orbit Determination Using Accelerometer Data

    NASA Technical Reports Server (NTRS)

    VanHelleputte, Tom; Visser, Pieter

    2007-01-01

    Currently two gravity field satellite missions, CHAMP and GRACE, are equipped with high sensitivity electrostatic accelerometers, measuring the non-conservative forces acting on the spacecraft in three orthogonal directions. During the gravity field recovery these measurements help to separate gravitational and non-gravitational contributions in the observed orbit perturbations. For precise orbit determination purposes all these missions have a dual-frequency GPS receiver on board. The reduced dynamic technique combines the dense and accurate GPS observations with physical models of the forces acting on the spacecraft, complemented by empirical accelerations, which are stochastic parameters adjusted in the orbit determination process. When the spacecraft carries an accelerometer, these measured accelerations can be used to replace the models of the non-conservative forces, such as air drag and solar radiation pressure. This approach is implemented in a batch least-squares estimator of the GPS High Precision Orbit Determination Software Tools (GHOST), developed at DLR/GSOC and DEOS. It is extensively tested with data of the CHAMP and GRACE satellites. As accelerometer observations typically can be affected by an unknown scale factor and bias in each measurement direction, they require calibration during processing. Therefore the estimated state vector is augmented with six parameters: a scale and bias factor for the three axes. In order to converge efficiently to a good solution, reasonable a priori values for the bias factor are necessary. These are calculated by combining the mean value of the accelerometer observations with the mean value of the non-conservative force models and empirical accelerations, estimated when using these models. When replacing the non-conservative force models with accelerometer observations and still estimating empirical accelerations, a good orbit precision is achieved. 100 days of GRACE B data processing results in a mean orbit fit of

  4. Classification accuracy of the wrist-worn GENEA accelerometer

    PubMed Central

    Welch, Whitney A.; Bassett, David R.; Thompson, Dixie L.; Freedson, Patty S.; Staudenmayer, John W.; John, Dinesh; Steeves, Jeremy A.; Conger, Scott A.; Ceaser, Tyrone; Howe, Cheryl A.; Sasaki, Jeffer E.; Fitzhugh, Eugene C.

    2013-01-01

    Purpose The purpose of this study was to determine whether the published left-wrist cut-points for the triaxial GENEA accelerometer, are accurate for predicting intensity categories during structured activity bouts. Methods A convenience sample of 130 adults wore a GENEA accelerometer on their left wrist while performing 14 different lifestyle activities. During each activity, oxygen consumption was continuously measured using the Oxycon mobile. Statistical analysis used Spearman's rank correlations to determine the relationship between measured and estimated intensity classifications. Cross tabulation tables were constructed to show under- or over-estimation of misclassified intensities. One-way chi-square tests were used to determine whether the intensity classification accuracy for each activity differed from 80%. Results For all activities the GENEA accelerometer-based physical activity monitor explained 41.1% of the variance in energy expenditure. The intensity classification accuracy was 69.8% for sedentary activities, 44.9% for light activities, 46.2% for moderate activities, and 77.7% for vigorous activities. The GENEA correctly classified intensity for 52.9% of observations when all activities were examined; this increased to 61.5% with stationary cycling removed. Conclusion A wrist-worn triaxial accelerometer has modest intensity classification accuracy across a broad range of activities, when using the cut-points of Esliger et al. Although the sensitivity and specificity are less than those reported by Esliger et al., they are generally in the same range as those reported for waist-worn, uniaxial accelerometer cut-points. PMID:23584403

  5. DrawFromDrawings: 2D Drawing Assistance with a Sketch Database.

    PubMed

    Matsui, Yusuke; Shiratori, Takaaki; Aizawa, Kiyoharu

    2016-04-14

    We present DrawFromDrawings, an interactive drawing system that provides users with visual feedback for assistance in 2D drawing using a database of sketch images. Following the traditional imitation and emulation training from art education, DrawFromDrawings enables users to retrieve and refer to a sketch image stored in a database and provides them with various novel strokes as suggestive or deformation feedback. Given regions of interest (ROIs) in the user and reference sketches, DrawFromDrawings detects as-long-as-possible (ALAP) stroke segments and the correspondences between user and reference sketches that are the key to computing seamless interpolations. The stroke-level interpolations are parametrized with the user strokes, the reference strokes, and new strokes created by warping the reference strokes based on the user and reference ROI shapes, and the user study indicated that the interpolation could produce various reasonable strokes varying in shapes and complexity. DrawFromDrawings allows users to either replace their strokes with interpolated strokes (deformation feedback) or overlays interpolated strokes onto their strokes (suggestive feedback). The other user studies on the feedback modes indicated that the suggestive feedback enabled drawers to develop and render their ideas using their own stroke style, whereas the deformation feedback enabled them to finish the sketch composition quickly.

  6. 25. Photocopy of engineering drawing (original drawing located in LBNL ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    25. Photocopy of engineering drawing (original drawing located in LBNL Building 90F Architecture and Engineering As-Built Collection). February 18, 1969. 4B51BK001. EXTERNAL PROTRON BEAM HALL. B51B FIRST FLOOR PLAN. - University of California Radiation Laboratory, Bevatron, 1 Cyclotron Road, Berkeley, Alameda County, CA

  7. 22. Photocopy of engineering drawing (original drawing located in LBNL ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    22. Photocopy of engineering drawing (original drawing located in LBNL Building 90F Architecture and Engineering As-Built Collection). September 29, 1964. 4B51K007 SECOND FLOOR PLAN. B51. - University of California Radiation Laboratory, Bevatron, 1 Cyclotron Road, Berkeley, Alameda County, CA

  8. 26. Photocopy of engineering drawing (original drawing located in LBNL ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    26. Photocopy of engineering drawing (original drawing located in LBNL Building 90F Architecture and Engineering As-Built Collection). October 24, 1956. 3/8'=1' 4B51S011. BEVATRON SHIELDING FOUNDATION - University of California Radiation Laboratory, Bevatron, 1 Cyclotron Road, Berkeley, Alameda County, CA

  9. 28. Photocopy of engineering drawing, May, 1941 (original drawing located ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    28. Photocopy of engineering drawing, May, 1941 (original drawing located at Fairchild Air Force Base, Civil Engineering Building, Civil Engineering vault). ENGINE TEST CELL BUILDING. AIR COOLED TEST STAND. - Fairchild Air Force Base, Engine Test Cell Building, Near intersection of Arnold Street & George Avenue, Spokane, Spokane County, WA

  10. 22. Photocopy of engineering drawing, April 10, 1958 (original drawing ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    22. Photocopy of engineering drawing, April 10, 1958 (original drawing located at Fairchild Air Force Base, Civil Engineering Building, Civil Engineering Vault). READINESS CREW BUILDING, LOWER FLOOR PLANS - Fairchild Air Force Base, Bomber Alert Facility, 803G South Taxi Way, Spokane, Spokane County, WA

  11. 23. Photocopy of engineering drawing, April 10, 1958 (original drawing ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    23. Photocopy of engineering drawing, April 10, 1958 (original drawing located at Fairchild Air Force Base, Civil Engineering Building, Civil Engineering Vault). READINESS CREW BUILDING, UPPER FLOOR PLANS - Fairchild Air Force Base, Bomber Alert Facility, 803G South Taxi Way, Spokane, Spokane County, WA

  12. 275. Photocopy of drawing (1977 civil engineering drawing by the ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    275. Photocopy of drawing (1977 civil engineering drawing by the Strategic Air Command, VAFB, USAF) SITE PLAN, LOCATION MAP, AND CONTOUR MAP, ALSO TABLE OF CONTENTS AND GENERAL NOTES, SHEET 1 OF 10 - Vandenberg Air Force Base, Space Launch Complex 3, Launch Pad 3 East, Napa & Alden Roads, Lompoc, Santa Barbara County, CA

  13. 4. PHOTOCOPY OF DRAWING (1960 CIVIL ENGINEERING DRAWING THE THE ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    4. PHOTOCOPY OF DRAWING (1960 CIVIL ENGINEERING DRAWING THE THE RALPH M. PARSONS COMPANY) PLOT AND UTILITY PLAN FOR THE SAMOS TECHNICAL SUPPORT BUILDING (BLDG. 761; NOW CALLED SLC-3 AIR FORCE BUILDING), SHEET C47 - Vandenberg Air Force Base, Space Launch Complex 3, SLC-3 Air Force Building, Napa & Alden Roads, Lompoc, Santa Barbara County, CA

  14. 17. Photocopy of drawing (1961 civil engineering drawing by Kaiser ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    17. Photocopy of drawing (1961 civil engineering drawing by Kaiser Engineers) SITE PLAN, PLOT PLAN, AND LOCATION MAP FOR VEHICLE SUPPORT BUILDING, SHEET C-1 - Vandenberg Air Force Base, Space Launch Complex 3, Vehicle Support Building, Napa & Alden Roads, Lompoc, Santa Barbara County, CA

  15. 14. Photocopy of engineering drawing (original drawing, #MH 10460086, dated ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    14. Photocopy of engineering drawing (original drawing, #MH 104-600-86, dated October 31, 1995, and drawn by W. Robinson, is located in the Mountain Home Air Force Base Civil Engineering archives). - Mountain Home Air Force Base, Base Chapel, 350 Willow Street, Cantonment Area, Mountain Home, Elmore County, ID

  16. 113. Photocopy of drawing (1964 civil engineering drawing by Koebig ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    113. Photocopy of drawing (1964 civil engineering drawing by Koebig & Koebig Inc.) ADDITION TO LAUNCH OPERATIONS BUILDING, POINT ARGUELLO LAUNCH COMPLEX ONE, GRADING AND UTILITY PLAN, SHEET C3 - Vandenberg Air Force Base, Space Launch Complex 3, Launch Operations Building, Napa & Alden Roads, Lompoc, Santa Barbara County, CA

  17. 3. PHOTOCOPY OF DRAWING (1975 CIVIL ENGINEERING DRAWING BY THE ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    3. PHOTOCOPY OF DRAWING (1975 CIVIL ENGINEERING DRAWING BY THE STRATEGIC AIR COMMAND, USAF) PROFILE AND PLAN OF ACCESS DRIVE FOR BUILDING 768, SHEET 1 OF 8 - Vandenberg Air Force Base, Space Launch Complex 3, Entry Control Point, Napa & Alden Roads, Lompoc, Santa Barbara County, CA

  18. 29. Photocopy of engineering drawing, May, 1941 (original drawing located ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    29. Photocopy of engineering drawing, May, 1941 (original drawing located at Fairchild Air Force Base, Civil Engineering Building, Civil Engineering vault). ENGINE TEST CELL BUILDING. 19508 RENOVATION OF FIRST FLOOR, CENTRAL PORTION. - Fairchild Air Force Base, Engine Test Cell Building, Near intersection of Arnold Street & George Avenue, Spokane, Spokane County, WA

  19. 120. Photocopy of drawing (1958 civil engineering drawing by the ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    120. Photocopy of drawing (1958 civil engineering drawing by the Ralph M. Parsons Company) STRUCTURAL DETAILS OF WAVE GUIDE ENCLOSURE AND CABLE TRAY INSTALLATION FOR LAUNCH OPERATIONS BUILDING, SHEET C42 - Vandenberg Air Force Base, Space Launch Complex 3, Launch Operations Building, Napa & Alden Roads, Lompoc, Santa Barbara County, CA

  20. 231. Photocopy of drawing (1958 civil engineering drawing by the ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    231. Photocopy of drawing (1958 civil engineering drawing by the Ralph M. Parsons Company) PAVING DETAILS FOR THE LSB, SHEET C23 OF 40 - Vandenberg Air Force Base, Space Launch Complex 3, Launch Pad 3 East, Napa & Alden Roads, Lompoc, Santa Barbara County, CA

  1. 21. Photocopy of engineering drawing, April 10, 1958 (original drawing ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    21. Photocopy of engineering drawing, April 10, 1958 (original drawing located at Fairchild Air Force Base, Civil Engineering Building, Civil Engineering Vault). READINESS CREW BUILDING, RAMP DETAILS - Fairchild Air Force Base, Bomber Alert Facility, 803G South Taxi Way, Spokane, Spokane County, WA

  2. 118. Photocopy of drawing (1958 civil engineering drawing by the ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    118. Photocopy of drawing (1958 civil engineering drawing by the Ralph M. Parsons Company) PLOT AND UTILITY PLAN FOR LAUNCH OPERATIONS BUILDING, SHEET C7 OF 40 - Vandenberg Air Force Base, Space Launch Complex 3, Launch Operations Building, Napa & Alden Roads, Lompoc, Santa Barbara County, CA

  3. 25. Photocopy of engineering drawing, January, 1988 (original drawing located ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    25. Photocopy of engineering drawing, January, 1988 (original drawing located at Fairchild Air Force Base, Civil Engineering Building, Civil Engineering Vault). EXTERIOR ELEVATIONS (northeast and southeast) - Fairchild Air Force Base, Bomber Alert Facility, 803G South Taxi Way, Spokane, Spokane County, WA

  4. 168. Photocopy of drawing (1979 civil engineering drawing by the ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    168. Photocopy of drawing (1979 civil engineering drawing by the Space and Missile Test Center, USAF) NITROGEN AND HELIUM PUMPING SYSTEM INSTALLATION SITE PLAN, SHEET 511-C-1 - Vandenberg Air Force Base, Space Launch Complex 3, Launch Pad 3 West, Napa & Alden Roads, Lompoc, Santa Barbara County, CA

  5. 157. Photocopy of drawing (1966 civil engineering drawing by AETRON) ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    157. Photocopy of drawing (1966 civil engineering drawing by AETRON) PLOT AND LOCATION PLAN, SECTIONS, AND DETAILS FOR THE UNDERGROUND CHECKOUT FACILITY ON THE WEST PAD, SHEET C-1 - Vandenberg Air Force Base, Space Launch Complex 3, Launch Pad 3 West, Napa & Alden Roads, Lompoc, Santa Barbara County, CA

  6. 3. PHOTOCOPY OF DRAWING (1976 CIVIL ENGINEERING DRAWING BY THE ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    3. PHOTOCOPY OF DRAWING (1976 CIVIL ENGINEERING DRAWING BY THE SPACE AND MISSILE TEST CENTER, VAFB, USAF) PARTIAL SITE PLAN, EQUIPMENT STORAGE BUILDING, PARKING AREA OVERLAY, AND NEW ROAD, SHEET C4 - Vandenberg Air Force Base, Space Launch Complex 3, Storage Shed, Napa & Alden Roads, Lompoc, Santa Barbara County, CA

  7. 1. Photocopy of drawing 1958 architectural drawing by the Ralph ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    1. Photocopy of drawing 1958 architectural drawing by the Ralph Parsons Company in possession of Vandenberg Air Force Base Civil Engineering Office) FLOOR PLANS, ELEVATIONS, AND DETAILS FOR TRAFFIC CHECK HOUSE (BLDG. 759), AND THEODOLITE SHELTERS, SHEET A9 - Vandenberg Air Force Base, Space Launch Complex 3, Traffic Check House, Napa & Alden Roads, Lompoc, Santa Barbara County, CA

  8. 20. Photocopy of engineering drawing, April 10, 1958 (original drawing ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    20. Photocopy of engineering drawing, April 10, 1958 (original drawing located at Fairchild Air Force Base, Civil Engineering Building, Civil Engineering Vault). READINESS CREW BUILDING, ELEVATIONS - Fairchild Air Force Base, Bomber Alert Facility, 803G South Taxi Way, Spokane, Spokane County, WA

  9. 24. Photocopy of engineering drawing, August 17, 1965 (original drawing ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    24. Photocopy of engineering drawing, August 17, 1965 (original drawing located at Fairchild Air Force Base, Civil Engineering Building, Civil Engineering Vault). 2080 READINESS CREW, COVERED WALKWAYS, PLAN AND DETAILS - Fairchild Air Force Base, Bomber Alert Facility, 803G South Taxi Way, Spokane, Spokane County, WA

  10. 26. Photocopy of engineering drawing, March 3, 1988 (original drawing ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    26. Photocopy of engineering drawing, March 3, 1988 (original drawing located at Fairchild Air Force Base, Civil Engineering Building, Civil Engineering Vault). EXTERIOR ELEVATIONS (southwest and northwest) - Fairchild Air Force Base, Bomber Alert Facility, 803G South Taxi Way, Spokane, Spokane County, WA

  11. 244. Photocopy of drawing (1958 civil engineering drawing by the ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    244. Photocopy of drawing (1958 civil engineering drawing by the Ralph M. Parsons Company) PLOT AND UTILITY PLAN FOR THE LSB, SHEET C5 OF 40 - Vandenberg Air Force Base, Space Launch Complex 3, Launch Pad 3 East, Napa & Alden Roads, Lompoc, Santa Barbara County, CA

  12. 119. Photocopy of drawing (1959 civil engineering drawing by the ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    119. Photocopy of drawing (1959 civil engineering drawing by the Ralph M. Parsons Company) PLOT PLAN AND PROFILE LINES OF WAVE GUIDE ENCLOSURE AND CABLE TRAY INSTALLATION FOR LAUNCH OPERATIONS BUILDING, SHEET C41 - Vandenberg Air Force Base, Space Launch Complex 3, Launch Operations Building, Napa & Alden Roads, Lompoc, Santa Barbara County, CA

  13. 27. Photocopy of engineering drawing, May, 1941 (original drawing located ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    27. Photocopy of engineering drawing, May, 1941 (original drawing located at Fairchild Air Force Base, Civil Engineering Building, Civil Engineering vault). ENGINE TEST CELL BUILDING. CROSS-SECTION, RIGHT AND LEFT END PORTIONS, TEST CELLS 5-12. - Fairchild Air Force Base, Engine Test Cell Building, Near intersection of Arnold Street & George Avenue, Spokane, Spokane County, WA

  14. 25. Photocopy of engineering drawing, May, 1941 (original drawing located ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    25. Photocopy of engineering drawing, May, 1941 (original drawing located at Fairchild Air Force Base, Civil Engineering Building, Civil Engineering vault). ENGINE TEST CELL BUILDING. ELEVATIONS, RIGHT AND LEFT PORTIONS, TEST CELLS 5-12. - Fairchild Air Force Base, Engine Test Cell Building, Near intersection of Arnold Street & George Avenue, Spokane, Spokane County, WA

  15. 18. Photocopy of engineering drawing, May, 1941 (original drawing located ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    18. Photocopy of engineering drawing, May, 1941 (original drawing located at Fairchild Air Force Base, Civil Engineering Building, Civil Engineering vault). ENGINE TEST CELL BUILDING. FIRST FLOOR PLAN, CENTRAL PORTION AND TEST CELLS 1-4. - Fairchild Air Force Base, Engine Test Cell Building, Near intersection of Arnold Street & George Avenue, Spokane, Spokane County, WA

  16. 21. Photocopy of engineering drawing, May, 1941 (original drawing located ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    21. Photocopy of engineering drawing, May, 1941 (original drawing located at Fairchild Air Force Base, Civil Engineering Building, Civil Engineering vault). ENGINE TEST CELL BUILDING. SECOND FLOOR PLAN, RIGHT AND LEFT END PORTIONS, TEST CELLS 5-12. - Fairchild Air Force Base, Engine Test Cell Building, Near intersection of Arnold Street & George Avenue, Spokane, Spokane County, WA

  17. 26. Photocopy of engineering drawing, May, 1941 (original drawing located ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    26. Photocopy of engineering drawing, May, 1941 (original drawing located at Fairchild Air Force Base, Civil Engineering Building, Civil Engineering vault). ENGINE TEST CELL BUILDING. CROSS-SECTION, CENTRAL PORTION AND TEST CELLS 1-4. - Fairchild Air Force Base, Engine Test Cell Building, Near intersection of Arnold Street & George Avenue, Spokane, Spokane County, WA

  18. 19. Photocopy of engineering drawing, May, 1941 (original drawing located ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    19. Photocopy of engineering drawing, May, 1941 (original drawing located at Fairchild Air Force Base, Civil Engineering Building, Civil Engineering vault). ENGINE TEST CELL BUILDING. FIRST FLOOR PLAN, RIGHT AND LEFT END PORTIONS, TEST CELLS 5-12. - Fairchild Air Force Base, Engine Test Cell Building, Near intersection of Arnold Street & George Avenue, Spokane, Spokane County, WA

  19. 17. Photocopy of engineering drawing, May, 1941 (original drawing located ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    17. Photocopy of engineering drawing, May, 1941 (original drawing located at Fairchild Air Force Base, Civil Engineering Building, Civil Engineering vault). ENGINE TEST CELL BUILDING. BASEMENT FLOOR PLAN, RIGHT AND LEFT END PORTIONS, TEST CELLS 5-12. - Fairchild Air Force Base, Engine Test Cell Building, Near intersection of Arnold Street & George Avenue, Spokane, Spokane County, WA

  20. 20. Photocopy of engineering drawing, May, 1941 (original drawing located ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    20. Photocopy of engineering drawing, May, 1941 (original drawing located at Fairchild Air Force Base, Civil Engineering Building, Civil Engineering vault). ENGINE TEST CELL BUILDING. SECOND FLOOR PLAN, CENTRAL PORTION AND TEST CELLS 1-4. - Fairchild Air Force Base, Engine Test Cell Building, Near intersection of Arnold Street & George Avenue, Spokane, Spokane County, WA

  1. 24. Photocopy of engineering drawing, May, 1941 (original drawing located ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    24. Photocopy of engineering drawing, May, 1941 (original drawing located at Fairchild Air Force Base, Civil Engineering Building, Civil Engineering vault). ENGINE TEST CELL BUILDING. ELEVATIONS, CENTRAL PORTION AND TEST CELLS 1-4. - Fairchild Air Force Base, Engine Test Cell Building, Near intersection of Arnold Street & George Avenue, Spokane, Spokane County, WA

  2. 16. Photocopy of engineering drawing, May, 1941 (original drawing located ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    16. Photocopy of engineering drawing, May, 1941 (original drawing located at Fairchild Air Force Base, Civil Engineering Building, Civil Engineering vault). ENGINE TEST CELL BUILDING. BASEMENT FLOOR PLAN, CENTRAL PORTION AND TEST CELLS 1-4. - Fairchild Air Force Base, Engine Test Cell Building, Near intersection of Arnold Street & George Avenue, Spokane, Spokane County, WA

  3. 22. Photocopy of engineering drawing, May, 1941 (original drawing located ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    22. Photocopy of engineering drawing, May, 1941 (original drawing located at Fairchild Air Force Base, Civil Engineering Building, Civil Engineering vault). ENGINE TEST CELL BUILDING. THIRD FLOOR AND ROOF PLAN, CENTRAL PORTION AND TEST CELLS 1-4. - Fairchild Air Force Base, Engine Test Cell Building, Near intersection of Arnold Street & George Avenue, Spokane, Spokane County, WA

  4. 23. Photocopy of engineering drawing, May, 1941 (original drawing located ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    23. Photocopy of engineering drawing, May, 1941 (original drawing located at Fairchild Air Force Base, Civil Engineering Building, Civil Engineering vault). ENGINE TEST CELL BUILDING. THIRD FLOOR AND ROOF PLAN, RIGHT AND LEFT END PORTIONS, TEST CELLS 5-12. - Fairchild Air Force Base, Engine Test Cell Building, Near intersection of Arnold Street & George Avenue, Spokane, Spokane County, WA

  5. 1. Photocopy of engineering drawing (original drawing located in LBNL ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    1. Photocopy of engineering drawing (original drawing located in LBNL Building 90F Architecture and Engineering As-Built Collection). January 1961. Dwg No. 6B 00D 005 CONTRACT 48 LEASE AND OCCUPANCY MAP - University of California Radiation Laboratory, Bevatron, 1 Cyclotron Road, Berkeley, Alameda County, CA

  6. 7. Photographic copy of construction drawing 1958 (original drawing located ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    7. Photographic copy of construction drawing 1958 (original drawing located in Building 301, Offutt AFB, Bellevue, Nebraska). Sections and details, both buildings. - Offutt Air Force Base, Looking Glass Airborne Command Post, Hydraulic Fluid Buildings, Northeast of Looking Glass Avenue at southwest side of Project Looking Glass Historic District, Bellevue, Sarpy County, NE

  7. 6. Photographic copy of construction drawing 1970 (original drawing located ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    6. Photographic copy of construction drawing 1970 (original drawing located in Building 301, Offutt AFB, Bellevue, Nebraska). Floor plan and section. - Offutt Air Force Base, Looking Glass Airborne Command Post, Vehicle Refueling Shop, In west corner of Project Looking Glass Historic District, Bellevue, Sarpy County, NE

  8. 4. Photographic copy of construction drawing 1958 (original drawing located ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    4. Photographic copy of construction drawing 1958 (original drawing located in Building 301, Offutt AFB, Bellevue, Nebraska). Blast deflector fence plan, elevations, and details. - Offutt Air Force Base, Looking Glass Airborne Command Post, Blast Deflector Fences, Northeast & Southwest sides of Operational Apron, Project Looking Glass Historic District, Bellevue, Sarpy County, NE

  9. 8. Photographic copy of construction drawing 1964 (original drawing located ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    8. Photographic copy of construction drawing 1964 (original drawing located in Building 301, Offutt AFB, Bellevue, Nebraska). Interior isometric with pump equipment, building no. 528. - Offutt Air Force Base, Looking Glass Airborne Command Post, Hydraulic Fluid Buildings, Northeast of Looking Glass Avenue at southwest side of Project Looking Glass Historic District, Bellevue, Sarpy County, NE

  10. 24. Photographic copy of construction drawing 1957 (original drawing located ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    24. Photographic copy of construction drawing 1957 (original drawing located in Building 301, Offutt AFB, Bellevue, Nebraska). Elevations and sectinos for fabric closure (gasket) for hangar doors. - Offutt Air Force Base, Looking Glass Airborne Command Post, Nose Docks, On either side of Hangar Access Apron at Northwest end of Project Looking Glass Historic District, Bellevue, Sarpy County, NE

  11. 6. Photographic copy of construction drawing 1958 (original drawing located ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    6. Photographic copy of construction drawing 1958 (original drawing located in Building 301, Offutt AFB, Bellevue, Nebraska). Floor plan, roof plan, and elevations, both buildings. - Offutt Air Force Base, Looking Glass Airborne Command Post, Hydraulic Fluid Buildings, Northeast of Looking Glass Avenue at southwest side of Project Looking Glass Historic District, Bellevue, Sarpy County, NE

  12. 3. Photographic copy of construction drawing 1958 (original drawing located ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    3. Photographic copy of construction drawing 1958 (original drawing located in Building 301, Offutt AFB, Bellevue, Nebraska). Blast deflector fence plan. - Offutt Air Force Base, Looking Glass Airborne Command Post, Blast Deflector Fences, Northeast & Southwest sides of Operational Apron, Project Looking Glass Historic District, Bellevue, Sarpy County, NE

  13. 26. Photographic copy of construction drawing 1957 (original drawing located ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    26. Photographic copy of construction drawing 1957 (original drawing located in Building 301, Offutt AFB, Bellevue, Nebraska). Floor and ceiling plan, interior elevations, detail sections, dock nos. 491, 492, and 493. - Offutt Air Force Base, Looking Glass Airborne Command Post, Nose Docks, On either side of Hangar Access Apron at Northwest end of Project Looking Glass Historic District, Bellevue, Sarpy County, NE

  14. 50. Photocopy of engineering drawing (original drawing located in LBNL ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    50. Photocopy of engineering drawing (original drawing located in LBNL Building 90F Architecture and Engineering As-Built Collection). June 6, 1949. 1/18'=1'. 5N51A002. BEVATRON SUB FLOOR PLAN - University of California Radiation Laboratory, Bevatron, 1 Cyclotron Road, Berkeley, Alameda County, CA

  15. Photocopy of engineering drawing dated June 30, 1944. (Original drawing ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    Photocopy of engineering drawing dated June 30, 1944. (Original drawing located in Command Historian's Archives, Naval Facilities Engineering Command, Port Hueneme, California. SITE PLAN OF ROOSEVELT BASE, JUNE 30, 1944 - Roosevelt Base, Bounded by Ocean Boulevard, Pennsylvania Avenue, Richardson Avenue, & Idaho Street, Long Beach, Los Angeles County, CA

  16. 46. Photocopy of engineering drawing (original drawing located in LBNL ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    46. Photocopy of engineering drawing (original drawing located in LBNL Building 90F Architecture and Engineering As-Built Collection). July 15, 1955. B51A0084. BEVATRON CONTROL ROOM - University of California Radiation Laboratory, Bevatron, 1 Cyclotron Road, Berkeley, Alameda County, CA

  17. 49. Photocopy of engineering drawing (original drawing located in LBNL ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    49. Photocopy of engineering drawing (original drawing located in LBNL Building 90F Architecture and Engineering As-Built Collection). June 6, 1949. B51A0354. BEVATRON PLOT PLAN (MASTEN AND HURD) - University of California Radiation Laboratory, Bevatron, 1 Cyclotron Road, Berkeley, Alameda County, CA

  18. 47. Photocopy of engineering drawing (original drawing located in LBNL ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    47. Photocopy of engineering drawing (original drawing located in LBNL Building 90F Architecture and Engineering As-Built Collection). July 15, 1955. B51A0084. BEVATRON CONTROL ROOM CEILING TREATMENT AND RELOCATION OF LIGHTS - University of California Radiation Laboratory, Bevatron, 1 Cyclotron Road, Berkeley, Alameda County, CA

  19. 60. Photocopy of engineering drawing (original drawing located in LBNL ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    60. Photocopy of engineering drawing (original drawing located in LBNL Building 90F Architecture and Engineering As-Built Collection). September 20, 1964. 4B51K001A. MAIN FLOOR PLAN B-51-51A - University of California Radiation Laboratory, Bevatron, 1 Cyclotron Road, Berkeley, Alameda County, CA

  20. 230. Photocopy of drawing (1958 structural drawing by the Ralph ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    230. Photocopy of drawing (1958 structural drawing by the Ralph M. Parsons Company) PLAN AND SECTIONS FOR THE UMBILICAL MAST TRENCH SHEET S20 OF 45 - Vandenberg Air Force Base, Space Launch Complex 3, Launch Pad 3 East, Napa & Alden Roads, Lompoc, Santa Barbara County, CA

  1. 259. Photocopy of drawing (1976 piping drawing by the Space ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    259. Photocopy of drawing (1976 piping drawing by the Space and Missile Test Center, VAFB, USAF) PLANS, SECTIONS, AND DETAILS OF THE DELUGE WATER SYSTEM FOR THE FLAME BUCKET, SHEET P-17 - Vandenberg Air Force Base, Space Launch Complex 3, Launch Pad 3 East, Napa & Alden Roads, Lompoc, Santa Barbara County, CA

  2. 182. Photocopy of drawing (1972 piping drawing by the Ralph ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    182. Photocopy of drawing (1972 piping drawing by the Ralph M. Parsons Company) PLAN FOR THE LIQUID NITROGEN STORAGE AND BOOSTER CONTROL ROOM FOR THE LSB (BLDG. 770), SHEET P-12 - Vandenberg Air Force Base, Space Launch Complex 3, Launch Pad 3 West, Napa & Alden Roads, Lompoc, Santa Barbara County, CA

  3. 238. Photocopy of drawing (1958 piping drawing by the Ralph ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    238. Photocopy of drawing (1958 piping drawing by the Ralph M. Parsons Company) NITROGEN FLOW DIAGRAM FOR THE LSB, SHEET P3 OF 36 - Vandenberg Air Force Base, Space Launch Complex 3, Launch Pad 3 East, Napa & Alden Roads, Lompoc, Santa Barbara County, CA

  4. 236. Photocopy of drawing (1958 piping drawing by the Ralph ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    236. Photocopy of drawing (1958 piping drawing by the Ralph M. Parsons Company) SECTIONS AND DETAILS FOR THE FUEL, HELIUM, AND NITROGEN STORAGE AREA FOR THE LSB, SHEET P14 OF 36 - Vandenberg Air Force Base, Space Launch Complex 3, Launch Pad 3 East, Napa & Alden Roads, Lompoc, Santa Barbara County, CA

  5. 235. Photocopy of drawing (1958 piping drawing by the Ralph ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    235. Photocopy of drawing (1958 piping drawing by the Ralph M. Parsons Company) PLAN FOR THE FUEL, HELIUM, AND NITROGEN STORAGE AREA FOR THE LSB, SHEET P13 OF 36 - Vandenberg Air Force Base, Space Launch Complex 3, Launch Pad 3 East, Napa & Alden Roads, Lompoc, Santa Barbara County, CA

  6. 264. Photocopy of drawing (1977 piping drawing by the Space ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    264. Photocopy of drawing (1977 piping drawing by the Space and Missile Test Center, VAFB, USAF) NITROGEN AND HELIUM PUMPING SYSTEMS INSTALLATION SITE PLAN AND DETAILS, SHEET 3 OF 9 - Vandenberg Air Force Base, Space Launch Complex 3, Launch Pad 3 East, Napa & Alden Roads, Lompoc, Santa Barbara County, CA

  7. 183. Photocopy of drawing (1965 mechanical drawing by Koebig & ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    183. Photocopy of drawing (1965 mechanical drawing by Koebig & Koebig, Inc.) GASEOUS NITROGEN PURGE SYSTEM FOR THE MST, SHEET M-2 - Vandenberg Air Force Base, Space Launch Complex 3, Launch Pad 3 East, Napa & Alden Roads, Lompoc, Santa Barbara County, CA

  8. 7. Photographic copy of construction drawing 1976 (original drawing located ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    7. Photographic copy of construction drawing 1976 (original drawing located in Building 301, Offutt AFB, Bellevue, Nebraska). Elevations of entire building exterior. Includes elevation, plan and details of the addition's interior stairs. - Offutt Air Force Base, Looking Glass Airborne Command Post, Aerospace Ground Equipment (AGE) Storage Facility, Far Northwest end of Project Looking Glass Historic District, Bellevue, Sarpy County, NE

  9. 8. Photographic copy of construction drawing 1976 (original drawing located ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    8. Photographic copy of construction drawing 1976 (original drawing located in Building 301, Offutt AFB, Bellevue, Nebraska). Floor plan of entire building. - Offutt Air Force Base, Looking Glass Airborne Command Post, Aerospace Ground Equipment (AGE) Storage Facility, Far Northwest end of Project Looking Glass Historic District, Bellevue, Sarpy County, NE

  10. Photographic copy of architectural drawing (original drawing located at the ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    Photographic copy of architectural drawing (original drawing located at the Panama Canal Commission Headquarters Building, Department of Engineering Vault, Balboa Heights, Republic of Panama), 1916. Elevation on prado - Balboa School, Northeast end of El Prado, Balboa, Former Panama Canal Zone, CZ

  11. Photographic copy of architectural drawing no. 40215. (original drawing located ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    Photographic copy of architectural drawing no. 4021-5. (original drawing located at the Engineering and Planning Office, Panama Canal Commission, Balboa, Republic of Panama). New Ancon Hospital general layout - Gorgas Hospital, Southwest of Gorgas Road, Balboa Heights, Former Panama Canal Zone, CZ

  12. Photographic copy of architectural drawing (original drawing located in the ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    Photographic copy of architectural drawing (original drawing located in the vault at the Directorate of Engineering and Housing, U.S. Army Garrison-Panama, Corozal, Republic of Panama). Sections and layout plans. - Fort Davis, Theater, Clem Road, Colon, Former Panama Canal Zone, CZ

  13. Photographic copy of architectural drawing (original drawing located in the ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    Photographic copy of architectural drawing (original drawing located in the vault at the Directorate of Engineering and Housing, U.S. Army Garrison-Panama, Corozal, Republic of Panama), 1917. Section and details - Fort Amador, Officers' Quarters, Fifth Street at intersection with Amador Road, Panama City, Former Panama Canal Zone, CZ

  14. Photographic copy of architectural drawing (original drawing located in the ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    Photographic copy of architectural drawing (original drawing located in the vault at the Directorate of Engineering and Housing, U.S. Army Garrison-Panama, Corozal, Republic of Panama), 1917. Left side and front framing - Fort Amador, Officers' Quarters, Fifth Street at intersection with Amador Road, Panama City, Former Panama Canal Zone, CZ

  15. Photographic copy of architectural drawing (original drawing located in the ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    Photographic copy of architectural drawing (original drawing located in the vault at the Directorate of Engineering and Housing, U.S. Army Garrison-Panama, Corozal, Republic of Panama). Details. - Fort Davis, Theater, Clem Road, Colon, Former Panama Canal Zone, CZ

  16. Photographic copy of architectural drawing (original drawing located in the ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    Photographic copy of architectural drawing (original drawing located in the vault at the Directorate of Engineering and Housing, U.S. Army Garrison-Panama, Corozal, Republic of Panama), 1917. Right side and front elevations - Fort Amador, Officers' Quarters, Fifth Street at intersection with Amador Road, Panama City, Former Panama Canal Zone, CZ

  17. Photographic copy of architectural drawing (original drawing located in the ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    Photographic copy of architectural drawing (original drawing located in the vault at the Directorate of Engineering and Housing, U.S. Army Garrison-Panama, Corozal, Republic of Panama). Floor plans. - Fort Davis, Theater, Clem Road, Colon, Former Panama Canal Zone, CZ

  18. Photographic copy of architectural drawing (original drawing located in the ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    Photographic copy of architectural drawing (original drawing located in the vault at the Directorate of Engineering and Housing, U.S. Army Garrison-Panama, Corozal, Republic of Panama). Elevations. - Fort Davis, Theater, Clem Road, Colon, Former Panama Canal Zone, CZ

  19. Photographic copy of architectural drawing (original drawing located in the ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    Photographic copy of architectural drawing (original drawing located in the vault at the Directorate of Engineering and Housing, (U.S. Army Garrison-Panama, Corozal, Republic of Panama), 1917. Right side and rear framing. - Fort Amador, Officers' Quarters, Fifth Street at intersection with Amador Road, Panama City, Former Panama Canal Zone, CZ

  20. Photographic copy of architectural drawing (original drawing located in the ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    Photographic copy of architectural drawing (original drawing located in the vault at the Directorate of Engineering and Housing, U.S. Army Garrison-Panama, Corozal, Republic of Panama), 1917. Interior partition framing - Fort Amador, Officers' Quarters, Fifth Street at intersection with Amador Road, Panama City, Former Panama Canal Zone, CZ

  1. Photographic copy of architectural drawing (original drawing located in the ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    Photographic copy of architectural drawing (original drawing located in the vault at the Directorate of Engineering and Housing, U.S. Army Garrison-Panama, Corozal, Republic of Panama), 1917. Left side and rear elevations - Fort Amador, Officers' Quarters, Fifth Street at intersection with Amador Road, Panama City, Former Panama Canal Zone, CZ

  2. Photographic copy of architectural drawing (original drawing located in the ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    Photographic copy of architectural drawing (original drawing located in the vault at the Directorate of Engineering and Housing, U.S. Army Garrison-Panama, Corozal, Republic of Panama), 1916. Floor plan - Fort Amador, Officers' Quarters, Fifth Street at intersection with Amador Road, Panama City, Former Panama Canal Zone, CZ

  3. Photocopy of drawing (February, 1936 Architectural Drawings by Burge and ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    Photocopy of drawing (February, 1936 Architectural Drawings by Burge and Stevens Architects, in possession of the Atlanta Housing Authority, Atlanta, GA) TYPE "B" APARTMENT UNITS, FLOOR PLAN AND LOCATION PLAN. - Techwood Homes (Public Housing), Bounded by North Avenue, Parker Street, William Street & Lovejoy Street, Atlanta, Fulton County, GA

  4. 11. Photocopy of Drawing (November 1934 Architectural Drawings by Burge ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    11. Photocopy of Drawing (November 1934 Architectural Drawings by Burge and Stevens, in Possession of the Engineering and Capital Improvements Department of the Atlanta Housing Authority, Atlanta, Georgia). PLOT PLAN SHOWING STREETS AND SIDEWALK OF TECHWOOD PROJECT #1101, SHEET A-2. - Techwood Homes (Public Housing), Bounded by North Avenue, Parker Street, William Street & Lovejoy Street, Atlanta, Fulton County, GA

  5. Photocopy of drawing (November, 1934 Architectural Drawings by Burge and ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    Photocopy of drawing (November, 1934 Architectural Drawings by Burge and Stevens Architects, in possession of the Atlanta Housing Authority, Atlanta, GA) FLOOR PLANS, TYPE "C" APARTMENTS. - Techwood Homes (Public Housing), Bounded by North Avenue, Parker Street, William Street & Lovejoy Street, Atlanta, Fulton County, GA

  6. Photocopy of drawing (February, 1936 Architectural Drawings by Burge and ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    Photocopy of drawing (February, 1936 Architectural Drawings by Burge and Stevens Architects, in possession of the Atlanta Housing Authority, Atlanta, GA) TYPE "C" and "D" APARTMENT UNITS, FLOOR PLAN AND LOCATION PLAN. - Techwood Homes (Public Housing), Bounded by North Avenue, Parker Street, William Street & Lovejoy Street, Atlanta, Fulton County, GA

  7. Photocopy of drawing (November, 1934 Architectural Drawings by Burge and ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    Photocopy of drawing (November, 1934 Architectural Drawings by Burge and Stevens Architects, in possession of the Atlanta Housing Authority, Atlanta, GA) FLOOR PLANS, TYPE "D" APRTMENTS. - Techwood Homes (Public Housing), Bounded by North Avenue, Parker Street, William Street & Lovejoy Street, Atlanta, Fulton County, GA

  8. Photocopy of drawing June, 1962 Architectural Drawings by Burge and ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    Photocopy of drawing June, 1962 Architectural Drawings by Burge and Stevens Architects, in possession of the Atlanta Housing Authority, Atlanta, GA) SITE PLAN IDENTIFYING SITE IMPROVEMENTS. - Techwood Homes (Public Housing), Bounded by North Avenue, Parker Street, William Street & Lovejoy Street, Atlanta, Fulton County, GA

  9. Photocopy of drawing (February, 1936 Architectural Drawings by Burge and ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    Photocopy of drawing (February, 1936 Architectural Drawings by Burge and Stevens Architects, in possession of the Atlanta Housing Authority, Atlanta, GA) TYPE "A" APARTMENT UNITS, FLOOR PLAN AND LOCATION PLAN. - Techwood Homes (Public Housing), Bounded by North Avenue, Parker Street, William Street & Lovejoy Street, Atlanta, Fulton County, GA

  10. 10. Photocopy of Drawing (November 1934 Architectural Drawings by Burge ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    10. Photocopy of Drawing (November 1934 Architectural Drawings by Burge and Stevens, in Possession of the Engineering and Capital Improvements Department of the Atlanta Housing Authority, Atlanta, Georgia). SITE OF TECHWOOD PROJECT #1101, SHEET A-1. - Techwood Homes (Public Housing), Bounded by North Avenue, Parker Street, William Street & Lovejoy Street, Atlanta, Fulton County, GA

  11. Photographic copy of original construction drawing, Elevations Architectural, drawing No. ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    Photographic copy of original construction drawing, Elevations Architectural, drawing No. 60-02-66 SF/5/1871, Wilcox, Erickson, Vogelbach and Baumann, New York, 1 May, 1959, on file Selfridge Base Museum. - Selfridge Field, Building No. 1031, West of Doolittle Avenue between B & C Streets, Mount Clemens, Macomb County, MI

  12. 117. Photocopy of drawing (1964 mechanical drawing by Koebig & ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    117. Photocopy of drawing (1964 mechanical drawing by Koebig & Koebig Inc.) ADDITION TO LAUNCH OPERATIONS BUILDING; POINT ARGUELLO LAUNCH COMPLEX ONE; ABBREVIATIONS, SYMBOLS, AND SCHEDULES; SHEET M-1 - Vandenberg Air Force Base, Space Launch Complex 3, Launch Operations Building, Napa & Alden Roads, Lompoc, Santa Barbara County, CA

  13. 242. Photocopy of drawing (1958 electrical drawing by the Ralph ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    242. Photocopy of drawing (1958 electrical drawing by the Ralph M. Parsons Company) UPPER LEVEL POWER LIGHTING AND COMMUNICATIONS PLAN FOR THE LSB, SHEET E21 OF 40 - Vandenberg Air Force Base, Space Launch Complex 3, Launch Pad 3 East, Napa & Alden Roads, Lompoc, Santa Barbara County, CA

  14. 146. Photocopy of drawing (1967 electrical drawing by Koebig & ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    146. Photocopy of drawing (1967 electrical drawing by Koebig & Koebig Inc.) MST MODIFICATION AND REFURBISHMENT; LIGHTING, AND POWER PLANS FOR STATIONS 12, 21, 30, AND 39, SHEET E-5 - Vandenberg Air Force Base, Space Launch Complex 3, Launch Pad 3 West, Napa & Alden Roads, Lompoc, Santa Barbara County, CA

  15. 112. Photocopy of drawing (1958 electrical drawing by the Ralph ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    112. Photocopy of drawing (1958 electrical drawing by the Ralph M. Parsons Company) LIGHTING AND ALARMS PLANS FOR LAUNCH OPERATIONS BUILDING, SHEET E17 OF 40 - Vandenberg Air Force Base, Space Launch Complex 3, Launch Operations Building, Napa & Alden Roads, Lompoc, Santa Barbara County, CA

  16. 243. Photocopy of drawing (1958 piping drawing by the Ralph ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    243. Photocopy of drawing (1958 piping drawing by the Ralph M. Parsons Company) WATER SYSTEMS FLOW DIAGRAM FOR THE LSB, SHEET P6 OF 36 - Vandenberg Air Force Base, Space Launch Complex 3, Launch Pad 3 East, Napa & Alden Roads, Lompoc, Santa Barbara County, CA

  17. 240. Photocopy of drawing (1958 piping drawing by the Ralph ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    240. Photocopy of drawing (1958 piping drawing by the Ralph M. Parsons Company) HELIUM FLOW DIAGRAM FOR THE LSB, SHEET P4 OF 36 - Vandenberg Air Force Base, Space Launch Complex 3, Launch Pad 3 East, Napa & Alden Roads, Lompoc, Santa Barbara County, CA

  18. 237. Photocopy of drawing (1958 piping drawing by the Ralph ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    237. Photocopy of drawing (1958 piping drawing by the Ralph M. Parsons Company) BOOSTER FUEL SYSTEM FLOW DIAGRAM FOR THE LSB, SHEET P1 OF 36 - Vandenberg Air Force Base, Space Launch Complex 3, Launch Pad 3 East, Napa & Alden Roads, Lompoc, Santa Barbara County, CA

  19. 116. Photocopy of drawing (1964 mechanical drawing by Koebig & ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    116. Photocopy of drawing (1964 mechanical drawing by Koebig & Koebig Inc.) ADDITION TO LAUNCH OPERATIONS BUILDING, POINT ARGUELLO LAUNCH COMPLEX ONE, FLOW SHEET 1 AND PIPING PLANS, SHEET M-2 - Vandenberg Air Force Base, Space Launch Complex 3, Launch Operations Building, Napa & Alden Roads, Lompoc, Santa Barbara County, CA

  20. 241. Photocopy of drawing (1958 piping drawing by the Ralph ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    241. Photocopy of drawing (1958 piping drawing by the Ralph M. Parsons Company) VEHICLE SERVICING SYSTEMS FLOW DIAGRAM FOR THE LSB, SHEET P5 OF 36 - Vandenberg Air Force Base, Space Launch Complex 3, Launch Pad 3 East, Napa & Alden Roads, Lompoc, Santa Barbara County, CA

  1. Photocopy of original drawing showing Wing A (drawing located at ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    Photocopy of original drawing showing Wing A (drawing located at NAWS China Lake, Division of Public Works). J.T. STAFFORD-J.H. DAVIES- H.L. GOGERTY: DISPENSARY, SICK CALL AND ADMINISTRATION, FLOOR PLAN AND ELEVATIONS - Naval Ordnance Test Station Inyokern, Dispensary, Main Site, Lauritsen Road at McIntyre Street, Ridgecrest, Kern County, CA

  2. Photocopy of original drawing showing Wing B (drawing located at ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    Photocopy of original drawing showing Wing B (drawing located at NAWS China Lake, Division of Public Works). J.T. STAFFORD-J.H. DAVIES-H.L. GOGERTY: DISPENSARY, SURGICAL AND OBSTETRICAL, FLOOR PLAN AND ELEVATIONS - Naval Ordnance Test Station Inyokern, Dispensary, Main Site, Lauritsen Road at McIntyre Street, Ridgecrest, Kern County, CA

  3. Photocopy of original drawing showing Wing A (drawing located at ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    Photocopy of original drawing showing Wing A (drawing located at NAWS China Lake, Division of Public Works). J.T. STAFFORD-J.H. DAVIES-H.L. GOGERTY: DISPENSARY, SICK CALL AND ADMINISTRATION, ROOF FRAMING PLAN AND DETAILS - Naval Ordnance Test Station Inyokern, Dispensary, Main Site, Lauritsen Road at McIntyre Street, Ridgecrest, Kern County, CA

  4. Photocopy of original drawing showing Building 3 layout (drawing located ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    Photocopy of original drawing showing Building 3 layout (drawing located at NAWS China Lake, Division of Public Works). J.T. STAFFORD-J.H. DAVIES-H.L. GOGERTY: DISPENSARY, CONNECTING CORRIDORS, FLOOR PLAN, ELEVATIONS, AND DETAILS - Naval Ordnance Test Station Inyokern, Dispensary, Main Site, Lauritsen Road at McIntyre Street, Ridgecrest, Kern County, CA

  5. Photocopy of original drawing showing Wing E (drawing located at ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    Photocopy of original drawing showing Wing E (drawing located at NAWS China Lake, Division of Public Works). J.T. STAFFORD-J.H. DAVIES-H.L. GOGERTY: SICK OFFICERS QUARTERS, FLOOR PLAN AND ELEVATIONS - Naval Ordnance Test Station Inyokern, Dispensary, Main Site, Lauritsen Road at McIntyre Street, Ridgecrest, Kern County, CA

  6. 1. Photocopy of measured drawing (original drawing in the possession ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    1. Photocopy of measured drawing (original drawing in the possession of the Rigsarkivet (Royal Archives), Copenhagen, Denmark, filed in Kortsamling 337C, Plan VI. Peter L. Oxholm, architect, 1779 PLAN OF GOVERNMENT HOUSE AND ELEVATION OF KING STREET (SOUTHWEST) FACADE - Government House, King Street, Christiansted, St. Croix, VI

  7. Photographic copy of architectural drawing (original drawing located at the ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    Photographic copy of architectural drawing (original drawing located at the Real Property Office, Naval Base Rodman, Republic of Panama), 1945. Plans and details for post office alterations - Fort Amador, Administration Building, Rear Admiral Nimitz Circle, Panama City, Former Panama Canal Zone, CZ

  8. Photographic copy of architectural drawing (original drawing located at the ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    Photographic copy of architectural drawing (original drawing located at the Real Property Office, Naval Base Rodman, Republic of Panama), 1943. Proposed design for post office alterations - Fort Amador, Administration Building, Rear Admiral Nimitz Circle, Panama City, Former Panama Canal Zone, CZ

  9. 3. PHOTOCOPY OF DRAWING (1960 ARCHITECTURAL DRAWING BY THE RALPH ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    3. PHOTOCOPY OF DRAWING (1960 ARCHITECTURAL DRAWING BY THE RALPH M. PARSONS COMPANY) FLOOR PLAN, ELEVATIONS, AND SECTION FOR THE SAMOS TECHNICAL SUPPORT BUILDING (BLDG. 761; NOW CALLED SLC-3 AIR FORCE BUILDING), SHEET A14 - Vandenberg Air Force Base, Space Launch Complex 3, SLC-3 Air Force Building, Napa & Alden Roads, Lompoc, Santa Barbara County, CA

  10. 9. Photograph copy of construction drawing, 1964 (original drawing in ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    9. Photograph copy of construction drawing, 1964 (original drawing in Building No. 301, Offutt Air Force Base, Bellevue, Nebraska). Site plan of project looking glass historic district and Offutt Air Force Base. - Offutt Air Force Base, Looking Glass Airborne Command Post, Looking Glass Avenue between Comstat Drive & Nightwatch Avenue, Offutt Air Force Base, Bellevue, Sarpy County, NE

  11. 4. PHOTOCOPY OF DRAWING (1976 STRUCTURAL AND ELECTRICAL DRAWING BY ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    4. PHOTOCOPY OF DRAWING (1976 STRUCTURAL AND ELECTRICAL DRAWING BY THE SPACE AND MISSILE TEST CENTER, VAFB, USAF) STRUCTURAL AND ELECTRICAL DIAGRAM FOR EQUIPMENT STORAGE BUILDING, SHEET S-26 - Vandenberg Air Force Base, Space Launch Complex 3, Storage Shed, Napa & Alden Roads, Lompoc, Santa Barbara County, CA

  12. 8. PHOTOCOPY OF DRAWING (1975 ELECTRICAL DRAWING BY THE RALPH ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    8. PHOTOCOPY OF DRAWING (1975 ELECTRICAL DRAWING BY THE RALPH M. PARSONS COMPANY) ELECTRICAL PLAN AND DETAILS FOR BUILDING 762-A, SHEET E4 - Vandenberg Air Force Base, Space Launch Complex 3, Technical Support Building, Napa & Alden Roads, Lompoc, Santa Barbara County, CA

  13. 5. PHOTOCOPY OF DRAWING (1975 ELECTRICAL DRAWING BY THE STRATEGIC ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    5. PHOTOCOPY OF DRAWING (1975 ELECTRICAL DRAWING BY THE STRATEGIC AIR COMMAND, USAF) ELECTRICAL PLANS FOR BUILDING 768, SHEET 7 OF 8 - Vandenberg Air Force Base, Space Launch Complex 3, Entry Control Point, Napa & Alden Roads, Lompoc, Santa Barbara County, CA

  14. 2. Photocopy of drawing (1976 structural and electrical drawing by ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    2. Photocopy of drawing (1976 structural and electrical drawing by the Strategic Air Command, USAF) SITE PLAN, STRUCTURAL AND ELECTRICAL FOR RELOCATING WAREHOUSE, SHEET 1 OF 1 - Vandenberg Air Force Base, Space Launch Complex 3, Storage Shed, Napa & Alden Roads, Lompoc, Santa Barbara County, CA

  15. 160. Photocopy of drawing (1967 electrical drawing by Koebig & ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    160. Photocopy of drawing (1967 electrical drawing by Koebig & Koebig, Inc.) MST MODIFICATION AND REFURBISHMENT; ELECTRICAL MODIFICATIONS OF LAUNCH DECK, SHEET E-3 - Vandenberg Air Force Base, Space Launch Complex 3, Launch Pad 3 West, Napa & Alden Roads, Lompoc, Santa Barbara County, CA

  16. 162. Photocopy of drawing (1961 mechanical drawing by the Ralph ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    162. Photocopy of drawing (1961 mechanical drawing by the Ralph M. Parsons Company) MODIFICATION, MECHANICAL ELEVATIONS, AND DETAILS FOR THE MST, SHEET M22 - Vandenberg Air Force Base, Space Launch Complex 3, Launch Pad 3 East, Napa & Alden Roads, Lompoc, Santa Barbara County, CA

  17. 24. Photocopy of Drawing (November 1934 Architectural Drawings by Burge ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    24. Photocopy of Drawing (November 1934 Architectural Drawings by Burge and Stevens, in Possession of the Engineering and Capital Improvements Department of the Atlanta Housing Authority, Atlanta, Georgia). SCHEDULES OF DOORS, WINDOWS, AND INTERIOR FINISHES OF TECHWOOD PROJECT #1101, SHEET A-56. - Techwood Homes, Building No. 1, 575-579 Techwood Drive, Atlanta, Fulton County, GA

  18. 34. Photocopy of drawing (November 1934 architectural drawings by Burge ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    34. Photocopy of drawing (November 1934 architectural drawings by Burge and Stevens, in possession of the Engineering and Capital Improvements Department of the Atlanta Housing Authority, Atlanta, Georgia). LANDSCAPE AND SITE PLAN OF TECHWOOD PROJECT # 1101, SHEET L-259. - Techwood Homes, McDaniel Dormitory, 581-587 Techwood Drive, Atlanta, Fulton County, GA

  19. 15. Photocopy of Drawing (November 1934 Architectural Drawings by Burge ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    15. Photocopy of Drawing (November 1934 Architectural Drawings by Burge and Stevens, in Possession of the Engineering and Capital Improvements Department of the Atlanta Housing Authority, Atlanta, Georgia). PLANTING PLAN AND PLANT LIST, BUILDINGS 1,2,3, AND GARAGES, TECHWOOD PROJECT #1101, SHEET L-250. - Techwood Homes, Building No. 1, 575-579 Techwood Drive, Atlanta, Fulton County, GA

  20. 12. Photocopy of Drawing (November 1934 Architectural Drawings by Burge ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    12. Photocopy of Drawing (November 1934 Architectural Drawings by Burge and Stevens, in Possession of the Engineering and Capital Improvements Department of the Atlanta Housing Authority, Atlanta, Georgia). PLANTING PLAN AND PLANT LIST, ADMINISTRATION BUILDING AND STORE, TECHWOOD PROJECT #1101, SHEET L-251. - Techwood Homes, Store & Administration Building, 114-138 Merrit Avenue, Atlanta, Fulton County, GA

  1. 20. Photocopy of Drawing (November 1934 Architectural Drawings by Burge ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    20. Photocopy of Drawing (November 1934 Architectural Drawings by Burge and Stevens, in Possession of the Engineering and Capital Improvements Department of the Atlanta Housing Authority, Atlanta, Georgia). FLOOR PLANS, TYPE 'C' APARTMENTS, KITCHEN ELEVATIONS, TECHWOOD PROJECT #1101, SHEET A-53. - Techwood Homes, Building No. 1, 575-579 Techwood Drive, Atlanta, Fulton County, GA

  2. 19. Photocopy of Drawing (November 1934 Architectural Drawings by Burge ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    19. Photocopy of Drawing (November 1934 Architectural Drawings by Burge and Stevens, in Possession of the Engineering and Capital Improvements Department of the Atlanta Housing Authority, Atlanta, Georgia). FLOOR PLANS, TYPE 'A' APARTMENTS, FLOOR PLANS, TYPE 'B' APARTMENTS, KITCHEN ELEVATIONS, TECHWOOD PROJECT #1101, SHEET A-52. - Techwood Homes, Building No. 1, 575-579 Techwood Drive, Atlanta, Fulton County, GA

  3. 35. Photocopy of drawing (November 1934 architectural drawings by Burge ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    35. Photocopy of drawing (November 1934 architectural drawings by Burge and Stevens, in possession of the Engineering and Capital Improvements Department of the Atlanta Housing Authority, Atlanta, Georgia). BASEMENT PLAN OF TECHWOOD PROJECT # 1101, SHEET A-45. - Techwood Homes, McDaniel Dormitory, 581-587 Techwood Drive, Atlanta, Fulton County, GA

  4. 37. Photocopy of drawing (November 1934 Architectural Drawings by Burge ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    37. Photocopy of drawing (November 1934 Architectural Drawings by Burge and Stevens, in possession of the Engineering and Capital Improvements Department of the Atlanta Housing Authority, Atlanta, Georgia). WEST, EAST, AND NORTH ELEVATIONS, AND SECTION THROUGH COURTYARD LOOKING NORTH, OF TECHWOOD PROJECT # 1101, SHEET A-47. - Techwood Homes, McDaniel Dormitory, 581-587 Techwood Drive, Atlanta, Fulton County, GA

  5. 36. Photocopy of drawing (November 1934 architectural drawings by Burge ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    36. Photocopy of drawing (November 1934 architectural drawings by Burge and Stevens, in possession of the Engineering and Capital Improvements Department of the Atlanta Housing Authority, Atlanta, Georgia). FIRST FLOOR PLAN (WITH VIGNETTES OF THIRD FLOOR) AND BATHROOM SECTIONS OF TECHWOOD PROJECT # 1101, SHEET A-46. - Techwood Homes, McDaniel Dormitory, 581-587 Techwood Drive, Atlanta, Fulton County, GA

  6. 29. Photocopy of Drawing (November 1934 Architectural Drawings by Burge ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    29. Photocopy of Drawing (November 1934 Architectural Drawings by Burge and Stevens, in Possession of the Engineering and Capital Improvements Department of the Atlanta Housing Authority, Atlanta, Georgia). ELEVATIONS, BUILDINGS 3, TECHWOOD PROJECT #1101, SHEET A-7. - Techwood Homes, Building No. 3, 559 Techwood Drive & 129-135 Merrit Avenue, Atlanta, Fulton County, GA

  7. 16. Photocopy of Drawing (November 1934 Architectural Drawings by Burge ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    16. Photocopy of Drawing (November 1934 Architectural Drawings by Burge and Stevens, in Possession of The Engineering and Capital Improvements Department of the Atlanta Housing Authority, Atlanta, Georgia). PLOT PLAN AND ROOF PLAN, BUILDINGS 1,2,3, AND GARAGES, TECHWOOD PROJECT #1101, SHEET A-3. - Techwood Homes, Building No. 1, 575-579 Techwood Drive, Atlanta, Fulton County, GA

  8. 18. Photocopy of Drawing (November 1934 Architectural Drawings by Burge ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    18. Photocopy of Drawing (November 1934 Architectural Drawings by Burge and Stevens, in Possession of the Engineering and Capital Improvements Department of the Atlanta Housing Authority, Atlanta, Georgia). FIRST FLOOR PLANS, BUILDINGS 1,2, AND 3, TECHWOOD PROJECT #1101, SHEET A-5. - Techwood Homes, Building No. 1, 575-579 Techwood Drive, Atlanta, Fulton County, GA

  9. 38. Photocopy of drawing (November 1934 architectural drawings by Burge ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    38. Photocopy of drawing (November 1934 architectural drawings by Burge and Stevens, in possession of the Engineering and Capital Improvements Department of the Atlanta Housing Authority, Atlanta, Georgia). SOUTH ELEVATION, SECTION THROUGH COURTYARD LOOKING SOUTH, AND ENTRANCE DETAILS, OF TECHWOOD PROJECT # 1101, SHEET A-48. - Techwood Homes, McDaniel Dormitory, 581-587 Techwood Drive, Atlanta, Fulton County, GA

  10. 40. Photocopy of drawing (November 1934 architectural drawings by Burge ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    40. Photocopy of drawing (November 1934 architectural drawings by Burge and Stevens, in possession of the Engineering and Capital Improvements Department of the Atlanta Housing Authority, Atlanta, Georgia). DETAILS OF ENTRANCES AND STAIRS (CONTINUED) OF TECHWOOD PROJECT # 1101, SHEET A-50. - Techwood Homes, McDaniel Dormitory, 581-587 Techwood Drive, Atlanta, Fulton County, GA

  11. 28. Photocopy of Drawing (November 1934 Architectural Drawings by Burge ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    28. Photocopy of Drawing (November 1934 Architectural Drawings by Burge and Stevens, in Possession of the Engineering and Capital Improvements Department of the Atlanta Housing Authority, Atlanta, Georgia). FLOOR PLANS, TYPE 'D' APARTMENTS, KITCHEN ELEVATIONS, TECHWOOD PROJECT #1101, SHEET A-54. - Techwood Homes, Building No. 3, 559 Techwood Drive & 129-135 Merrit Avenue, Atlanta, Fulton County, GA

  12. 14. Photocopy of Drawing (November 1934 Architectural Drawings by Burge ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    14. Photocopy of Drawing (November 1934 Architectural Drawings by Burge and Stevens, in Possession of the Engineering and Capital Improvements Department of the Atlanta Housing Authority, Atlanta, Georgia). FLOOR PLANS AND ELEVATIONS, ADMINISTRATION BUILDING AND STORE, TECHWOOD PROJECT #1101, SHEET A-9. - Techwood Homes, Store & Administration Building, 114-138 Merrit Avenue, Atlanta, Fulton County, GA

  13. 17. Photocopy of Drawing (November 1934 Architectural Drawings by Burge ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    17. Photocopy of Drawing (November 1934 Architectural Drawings by Burge and Stevens, in Possession of the Engineering and Capital Improvements Department of the Atlanta Housing Authority, Atlanta, Georgia). BASEMENT PLANS, BUILDINGS 1,2, AND 3, TECHWOOD PROJECT #1101, SHEET A-4. - Techwood Homes, Building No. 1, 575-579 Techwood Drive, Atlanta, Fulton County, GA

  14. 39. Photocopy of drawing (November 1934 architectural drawings by Burge ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    39. Photocopy of drawing (November 1934 architectural drawings by Burge and Stevens, in possession of the Engineering and Capital Improvements Department of the Atlanta Housing Authority, Atlanta, Georgia). DETAILS OF ENTRANCES AND STAIRS OF TECHWOOD PROJECT # 1101, SHEET A-49. - Techwood Homes, McDaniel Dormitory, 581-587 Techwood Drive, Atlanta, Fulton County, GA

  15. Photocopy of drawing (November 1934 Architect Drawings by Burge and ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    Photocopy of drawing (November 1934 Architect Drawings by Burge and Stevens, in Possession of the Engineering and Capital Improvements Department of the Atlanta Housing Authority, Atlanta, Georgia). PLOT PLAN SHOWING STREETS AND SIDEWALK OF TECHWOOD PROJECT #1101, SHEET A-2. - Techwood Homes, Building No. 16, 488-514 Techwood Drive, Atlanta, Fulton County, GA

  16. Photocopy of Drawing (November 1934 Architectural Drawings by Burge and ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    Photocopy of Drawing (November 1934 Architectural Drawings by Burge and Stevens, in Possession of the Engineering and Capitol Improvements Department of the Atlantic Housing Authority, Atlanta, Georgia). SITE PLAN OF TECHWOOD PORJECT # 1101, SHEET A-1. - Techwood Homes, Building No. 16, 488-514 Techwood Drive, Atlanta, Fulton County, GA

  17. 13. Photocopy of Drawing (November 1934 Architectural Drawings by Burge ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    13. Photocopy of Drawing (November 1934 Architectural Drawings by Burge and Stevens, in Possession of the Engineering and Capital Improvements Department of the Atlanta Housing Authority, Atlanta, Georgia). PLOT PLAN AND ROOF PLAN, ADMINISTRATION BUILDING AND STORE, TECHWOOD PROJECT #1101, SHEET A-8. - Techwood Homes, Store & Administration Building, 114-138 Merrit Avenue, Atlanta, Fulton County, GA

  18. 21. Photocopy of Drawing (November 1934 Architectural Drawings by Burge ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    21. Photocopy of Drawing (November 1934 Architectural Drawings by Burge and Stevens, in Possession of the Engineering and Capital Improvements Department of the Atlanta Housing Authority, Atlanta, Georgia). ELEVATIONS, BUILDINGS 1 AND 2, TECHWOOD PROJECT #1101, SHEET A-6. - Techwood Homes, Building No. 1, 575-579 Techwood Drive, Atlanta, Fulton County, GA

  19. 172. Photocopy of drawing (1958 electrical drawing by the Ralph ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    172. Photocopy of drawing (1958 electrical drawing by the Ralph M. Parsons Company) POWER AND ALARMS, MST STATIONS 70.5, 78, 85.5, 111, AND 112, SHEET E32 OF 40 - Vandenberg Air Force Base, Space Launch Complex 3, Launch Pad 3 East, Napa & Alden Roads, Lompoc, Santa Barbara County, CA

  20. 7. Photograph of extant ink on linen drawings (original drawings ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    7. Photograph of extant ink on linen drawings (original drawings held in the vault of the Office of the State Architect in Sacramento) DETAILS OF FLAT SLAB CONSTRUCTION, AUGUST 1922 - California State Printing Office, 1020 O Street, Sacramento, Sacramento County, CA

  1. 250. Photocopy of drawing (1858 structural drawing by the Ralph ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    250. Photocopy of drawing (1858 structural drawing by the Ralph M. Parsons Company) PLANS, ELEVATIONS, SECTIONS, AND DETAILS FOR THE TELEVISION TOWERS AND SUPPORTS AT LSB (BLDG. 751), SHEET S23 OF 45 - Vandenberg Air Force Base, Space Launch Complex 3, Launch Pad 3 East, Napa & Alden Roads, Lompoc, Santa Barbara County, CA

  2. 159. Photocopy of drawing (1966 structural drawing by AETRON) CONCRETE ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    159. Photocopy of drawing (1966 structural drawing by AETRON) CONCRETE SECTIONS AND DETAILS NO. 1 OF THE UNDERGROUND CHECKOUT FACILITY, SHEET S-2 - Vandenberg Air Force Base, Space Launch Complex 3, Launch Pad 3 West, Napa & Alden Roads, Lompoc, Santa Barbara County, CA

  3. 158. Photocopy of drawing (1966 structural drawing by AETRON) FRAMING ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    158. Photocopy of drawing (1966 structural drawing by AETRON) FRAMING PLAN, ELEVATIONS, SECTIONS, AND DETAILS FOR THE TRANSFER AREA SHELTER AND UNDERGROUND CHECKOUT FACILITY, SHEET S-4 - Vandenberg Air Force Base, Space Launch Complex 3, Launch Pad 3 West, Napa & Alden Roads, Lompoc, Santa Barbara County, CA

  4. 190. Photocopy of drawing (1975 structural drawing by the Ralph ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    190. Photocopy of drawing (1975 structural drawing by the Ralph M. Parsons Company) ENVIRONMENTAL DOORS, ELEVATIONS FOR THE MST, SHEET S-11 - Vandenberg Air Force Base, Space Launch Complex 3, Launch Pad 3 East, Napa & Alden Roads, Lompoc, Santa Barbara County, CA

  5. 191. Photocopy of drawing (1975 mechanical drawing by the Ralph ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    191. Photocopy of drawing (1975 mechanical drawing by the Ralph M. Parsons Company) ENVIRONMENTAL DOORS, HYDRAULIC UNIT, CYLINDER, AND HINGES FOR THE MST, SHEET M-6 - Vandenberg Air Force Base, Space Launch Complex 3, Launch Pad 3 East, Napa & Alden Roads, Lompoc, Santa Barbara County, CA

  6. 234. Photocopy of drawing (1958 piping drawing by the Ralph ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    234. Photocopy of drawing (1958 piping drawing by the Ralph M. Parsons Company) BOOSTER LIQUID OXYGEN SYSTEM FLOW DIAGRAM FOR THE LSB, SHEET P2 OF 36 - Vandenberg Air Force Base, Space Launch Complex 3, Launch Pad 3 East, Napa & Alden Roads, Lompoc, Santa Barbara County, CA

  7. 232. Photocopy of drawing (1958 piping drawing by the Ralph ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    232. Photocopy of drawing (1958 piping drawing by the Ralph M. Parsons Company) PLAN FOR THE LIQUID AND GASEOUS OXYGEN STORAGE AREA IN THE LSB, SHEET P17 OF 36 - Vandenberg Air Force Base, Space Launch Complex 3, Launch Pad 3 East, Napa & Alden Roads, Lompoc, Santa Barbara County, CA

  8. 179. Photocopy of drawing (1972 piping drawing by the Ralph ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    179. Photocopy of drawing (1972 piping drawing by the Ralph M. Parsons Company) LIQUID OXYGEN STORAGE PLAN FOR THE LSB (BLDG. 770), SHEET P-7 - Vandenberg Air Force Base, Space Launch Complex 3, Launch Pad 3 West, Napa & Alden Roads, Lompoc, Santa Barbara County, CA

  9. 233. Photocopy of drawing (1958 piping drawing by the Ralph ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    233. Photocopy of drawing (1958 piping drawing by the Ralph M. Parsons Company) PLAN FOR THE LIQUID OXYGEN CONTROL ROOM FOR THE LSB, SHEET P16 OF 36 - Vandenberg Air Force Base, Space Launch Complex 3, Launch Pad 3 East, Napa & Alden Roads, Lompoc, Santa Barbara County, CA

  10. 256. Photocopy of drawing (1975 piping drawing by the Ralph ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    256. Photocopy of drawing (1975 piping drawing by the Ralph M. Parsons Company) LIQUID OXYGEN FLOW DIAGRAM FOR THE LSB AREA, SHEET P-2 - Vandenberg Air Force Base, Space Launch Complex 3, Launch Pad 3 East, Napa & Alden Roads, Lompoc, Santa Barbara County, CA

  11. 257. Photocopy of drawing (1975 piping drawing by the Ralph ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    257. Photocopy of drawing (1975 piping drawing by the Ralph M. Parsons Company) PARTIAL PIPING PLAN OF THE LIQUID OXYGEN STORAGE AREA FOR THE LSB, SHEET P-5 - Vandenberg Air Force Base, Space Launch Complex 3, Launch Pad 3 East, Napa & Alden Roads, Lompoc, Santa Barbara County, CA

  12. 180. Photocopy of drawing (1972 piping drawing by the Ralph ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    180. Photocopy of drawing (1972 piping drawing by the Ralph M. Parsons Company) LIQUID OXYGEN FLOW DIAGRAM FOR THE LSB (BLDG. 770), SHEET P-2 - Vandenberg Air Force Base, Space Launch Complex 3, Launch Pad 3 West, Napa & Alden Roads, Lompoc, Santa Barbara County, CA

  13. 131. Photographic copy of drawing (undated, original drawing in Archives, ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    131. Photographic copy of drawing (undated, original drawing in Archives, Public Affairs Department, Sears Merchandise Group, Hoffman Estates, Illinois). Engineer unknown. Full size. Pneumatic tube cartridges used at the time of the Plant closing. 4' PNEUMATIC TUBE SYSTEM - 11' LEATHER CARRIER - Sears Roebuck & Company Mail Order Plant, Merchandise Building, 924 South Homan Avenue, Chicago, Cook County, IL

  14. 130. Photographic copy of drawing (undated, original drawing in Archives, ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    130. Photographic copy of drawing (undated, original drawing in Archives, Public Affairs Department, Sears Merchandise Group, Hoffman Estates, Illinois). Engineer unknown. Full size. Pneumatic tube cartridges used at the time of the Plant closing. 4' PNEUMATIC TUBE SYSTEM - 11' LEATHER CARRIER - Sears Roebuck & Company Mail Order Plant, Merchandise Building, 924 South Homan Avenue, Chicago, Cook County, IL

  15. 22. Photographic copy of original construction drawing, ca. 1916 (drawing ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    22. Photographic copy of original construction drawing, ca. 1916 (drawing located at the Thompson Falls Hydroelectric Project, Thompson Falls, Montana). Architect unknown. POWERHOUSE FOREMAN'S BUNGALOW; FIRST FLOOR PLAN. - Thompson Falls Hydroelectric Project, Power Foreman's Bungalow, On island between Forebay Channel & ClarkFord River, Thompson Falls, Sanders County, MT

  16. 253. Photocopy of drawing (1975 demolition drawing by the Ralph ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    253. Photocopy of drawing (1975 demolition drawing by the Ralph M. Parsons Company) DEMOLITION AND REMOVAL FOR LAUNCHER - SLC-3E, SHEET D-9 - Vandenberg Air Force Base, Space Launch Complex 3, Launch Pad 3 East, Napa & Alden Roads, Lompoc, Santa Barbara County, CA

  17. 186. Photocopy of drawing (1975 demolition drawing by the Ralph ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    186. Photocopy of drawing (1975 demolition drawing by the Ralph M. Parsons Company) DEMOLITION AND REMOVAL PLANS FOR THE MST; NORTH, SOUTH, AND EAST, TOWER ELEVATIONS, SHEET D-3 - Vandenberg Air Force Base, Space Launch Complex 3, Launch Pad 3 East, Napa & Alden Roads, Lompoc, Santa Barbara County, CA

  18. 187. Photocopy of drawing (1975 demolition drawing by the Ralph ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    187. Photocopy of drawing (1975 demolition drawing by the Ralph M. Parsons Company) DEMOLITION AND REMOVAL PLANS FOR MST STATIONS 3 AND 12, SHEET D-4 - Vandenberg Air Force Base, Space Launch Complex 3, Launch Pad 3 East, Napa & Alden Roads, Lompoc, Santa Barbara County, CA

  19. 188. Photocopy of drawing (1975 demolition drawing by the Ralph ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    188. Photocopy of drawing (1975 demolition drawing by the Ralph M. Parsons Company) DEMOLITION AND REMOVAL PLANS FOR MST STATION 39, 48, 55.5, AD 63, SHEET D-6 - Vandenberg Air Force Base, Space Launch Complex 3, Launch Pad 3 East, Napa & Alden Roads, Lompoc, Santa Barbara County, CA

  20. 13. Photocopy of architectural drawing #571718 (original drawing located in ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    13. Photocopy of architectural drawing #571718 (original drawing located in Southern California Edison Archives, Rosemead, California). THREE FAMILY HOUSE FOR SOUTHERN SIERRAS POWER COMPANY LEE VINING CREEK POWER PLANT, FLOOR PLAN. - Lee Vining Creek Hydroelectric System, Triplex Cottage, Lee Vining Creek, Lee Vining, Mono County, CA

  1. 7. Photocopy of architectural drawing #571717 (original drawing located in ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    7. Photocopy of architectural drawing #571717 (original drawing located in Southern California Edison Archives, Rosemead, California). THREE FAMILY HOUSE FOR SOUTHERN SIERRAS POWER COMPANY LEE VINING CREEK POWER PLANT, FOUNDATION PLAN. - Lee Vining Creek Hydroelectric System, Triplex Cottage, Lee Vining Creek, Lee Vining, Mono County, CA

  2. Photographic copy of architectural drawing (original drawing located at the ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    Photographic copy of architectural drawing (original drawing located at the Panama Canal Commission Headquarters Building, Department of Engineering Vault, Balboa Heights, Republic of Panama). Details of bookshelves and pilasters. - Quarry Heights, Officers' Quarters, Parkinson Lane, Balboa, Former Panama Canal Zone, CZ

  3. 222. Photocopy of drawing (1958 piping drawing by the Ralph ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    222. Photocopy of drawing (1958 piping drawing by the Ralph M. Parsons Company) VEHICLE SERVICING SYSTEMS SECTIONS FOR THE UMBILICAL MAST, SHEET P24 OF 36 - Vandenberg Air Force Base, Space Launch Complex 3, Launch Pad 3 East, Napa & Alden Roads, Lompoc, Santa Barbara County, CA

  4. 278. Photocopy of drawing (1978 structural electrical drawing by the ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    278. Photocopy of drawing (1978 structural electrical drawing by the Space and Missile Test Center, VAFB, USAF) DETAILS, SECTION, AND ELECTRICAL PLAN FOR THE TIROS AND NOAA THEODOLITE STATION, SLC-3E, SHEET 4 OF 4 - Vandenberg Air Force Base, Space Launch Complex 3, Launch Pad 3 East, Napa & Alden Roads, Lompoc, Santa Barbara County, CA

  5. 18. Photocopy of drawing (1961 architectural drawing by Kaiser Engineers) ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    18. Photocopy of drawing (1961 architectural drawing by Kaiser Engineers) FLOOR PLAN, ELEVATIONS, AND SCHEDULE FOR VEHICLE SUPPORT BUILDING, SHEET A-1 - Vandenberg Air Force Base, Space Launch Complex 3, Vehicle Support Building, Napa & Alden Roads, Lompoc, Santa Barbara County, CA

  6. On astronomical drawing [1846

    NASA Astrophysics Data System (ADS)

    Smyth, Charles Piazzi

    Reprinted from the Memoirs of the Royal Astronomical Society 15, 1846, pp. 71-82. With annotations and illustrations added by Klaus Hentschel. The activities of the Astronomer Royal for Scotland, Charles Piazzi Smyth (1819-1900), include the triangulation of South African districts, landscape painting, day-to-day or tourist sketching, the engraving and lithographing of prominent architectural sites, the documentary photography of the Egyptian pyramids or the Tenerife Dragon tree, and `instant photographs' of the clouds above his retirement home in Clova, Ripon. His colorful records of the aurora polaris, and solar and terrestrial spectra all profited from his trained eye and his subtle mastery of the pen and the brush. As his paper on astronomical drawing, which we chose to reproduce in this volume, amply demonstrates, he was conversant in most of the print technology repertoire that the 19th century had to offer, and carefully selected the one most appropriate to each sujet. For instance, he chose mezzotint for the plates illustrating Maclear's observations of Halley's comet in 1835/36, so as to achieve a ``rich profundity of shadows, the deep obscurity of which is admirably adapted to reproduce those fine effects of chiaroscuro frequently found in works where the quantity of dark greatly predominates.'' The same expertise with which he tried to emulate Rembrandt's chiaroscuro effects he applied to assessing William and John Herschel's illustrations of nebulae, which appeared in print between 1811 and 1834. William Herschel's positive engraving, made partly by stippling and partly by a coarse mezzotint, receives sharp admonishment because of the visible ruled crossed lines in the background and the fact that ``the objects, which are also generally too light, [have] a much better definition than they really possess.'' On the other hand, John Herschel's illustration of nebulae and star clusters, given in negative, ``in which the lights are the darkest part of the

  7. 37 CFR 1.152 - Design drawings.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ... are not permitted in a design drawing. Photographs and ink drawings are not permitted to be combined as formal drawings in one application. Photographs submitted in lieu of ink drawings in design...

  8. 37 CFR 1.152 - Design drawings.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... are not permitted in a design drawing. Photographs and ink drawings are not permitted to be combined as formal drawings in one application. Photographs submitted in lieu of ink drawings in design...

  9. Validity of a Wearable Accelerometer Device to Measure Average Acceleration Values During High-Speed Running.

    PubMed

    Alexander, Jeremy P; Hopkinson, Trent L; Wundersitz, Daniel W T; Serpell, Benjamin G; Mara, Jocelyn K; Ball, Nick B

    2016-11-01

    Alexander, JP, Hopkinson, TL, Wundersitz, DWT, Serpell, BG, Mara, JK, and Ball, NB. Validity of a wearable accelerometer device to measure average acceleration values during high-speed running. J Strength Cond Res 30(11): 3007-3013, 2016-The aim of this study was to determine the validity of an accelerometer to measure average acceleration values during high-speed running. Thirteen subjects performed three sprint efforts over a 40-m distance (n = 39). Acceleration was measured using a 100-Hz triaxial accelerometer integrated within a wearable tracking device (SPI-HPU; GPSports). To provide a concurrent measure of acceleration, timing gates were positioned at 10-m intervals (0-40 m). Accelerometer data collected during 0-10 m and 10-20 m provided a measure of average acceleration values. Accelerometer data was recorded as the raw output and filtered by applying a 3-point moving average and a 10-point moving average. The accelerometer could not measure average acceleration values during high-speed running. The accelerometer significantly overestimated average acceleration values during both 0-10 m and 10-20 m, regardless of the data filtering technique (p < 0.001). Body mass significantly affected all accelerometer variables (p < 0.10, partial η = 0.091-0.219). Body mass and the absence of a gravity compensation formula affect the accuracy and practicality of accelerometers. Until GPSports-integrated accelerometers incorporate a gravity compensation formula, the usefulness of any accelerometer-derived algorithms is questionable.

  10. Characteristics associated with requested and required accelerometer wear in children

    PubMed Central

    Wells, Sian L; Kipping, Ruth R; Jago, Russell; Brown, Judith; Hucker, Daniel; Blackett, Ali; Lawlor, Debbie A

    2013-01-01

    Objective To investigate characteristics associated with wearing an accelerometer for the required and requested time among 8-year-old to 10-year-old children. Design Cross-sectional. Setting 60 Bristol and North Somerset primary schools taking part in the ‘Active for Life Year 5’ randomised controlled trial (RCT) in 2011. Participants 2048 children, aged 8–10 years, invited to wear an accelerometer for 5 days of recording. Primary outcome measure Numbers meeting required wear-time for inclusion in main RCT analysis (≥8 h/day ≥3 days) and numbers meeting requested wear-time (≥8 h/day for all 5 days). Results 817 (40%) of the children wore the accelerometer for the requested time and 1629 (80%) for the required time. In adjusted multivariable analyses the odds of wearing the accelerometer for the required time were greater in females as compared with males (OR 1.76 (1.42–2.18)), those with higher scores for reporting their mother restricted time on sedentary behaviours (1.26 (1.04–1.52) per increase of 1 on a 1–4 scale) and in children from schools with larger year group sizes (1.01 (1.00–1.02) per additional child). Living in a neighbourhood with higher levels of deprivation (0.49 (0.33–0.72) comparing highest to lowest third of the deprivation score) or reporting higher levels of weekday outdoor play (0.97 (0.94, 1.00) per 30 min more) were associated with reduced odds of meeting required time. Results were essentially the same for requested wear-time. Other characteristics, including child body mass index, were not associated with required or requested wear-time. Conclusions Only 40% of children wore the accelerometer for the requested time but 80% fulfilled the required criteria to be included in the main study analyses. Knowing which characteristics are associated with accelerometer wear could help target interventions to increase wear-time. PMID:23975106

  11. Children's Drawing

    ERIC Educational Resources Information Center

    Richardson, Marion

    2015-01-01

    In this article from 1936, author Marion Richardson begins by discussing how teachers have changed their approach to teaching drawing--from teaching students to draw still life and copy from objects to allowing children to use their own technique. She explains, "We have changed our methods, partly because we no longer think of art as…

  12. Drawing cure: children's drawings as a psychoanalytic instrument.

    PubMed

    Wittmann, Barbara

    2010-01-01

    This essay deals with the special case of drawings as psychoanalytical instruments. It aims at a theoretical understanding of the specific contribution made by children's drawings as a medium of the psychical. In the influential play technique developed by Melanie Klein, drawing continuously interacts with other symptomatic (play) actions. Nonetheless, specific functions of drawing within the play technique can be identified. The essay will discuss four crucial aspects in-depth: 1) the strengthening of the analysis's recursivity associated with the graphic artifact; 2) the opening of the analytic process facilitated by drawing; 3) the creation of a genuinely graphic mode of producing meaning that allows the child to develop a "theory" of the workings of his own psychic apparatus; and 4) the new possibilities of symbolization associated with the latter. In contrast to classical definitions of the psychological instrument, the child's drawing is a weakly structured tool that does not serve to reproduce psychic processes in an artificial, controlled setting. The introduction of drawing into the psychoanalytic cure is by no means interested in replaying past events, but in producing events suited to effecting a transformation of the synchronic structures of the unconscious.

  13. 6. Photocopy of drawing. (This drawing is an 8' x ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    6. Photocopy of drawing. (This drawing is an 8' x 10' enlargement from a 4' x 5' negative; 1942 drawing titled 'Mess Halls; Types M-B-T, M-C-T, M-D-T, M-E-T, M-G-T, M-H-T, M-I-T, M-K-T, M-L-T, M-M-T & M-N-T; Electrical,' Plan No. T.O. 700-6601, located at Directorate of Engineering and Housing, Fort McPherson.) - Fort McPherson, World War II Station Hospital, G. U. Treatment Unit Mess Hall, Thorne & Hood Avenues, Atlanta, Fulton County, GA

  14. 116. Photographic copy of drawing (25 June 1917, original drawing ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    116. Photographic copy of drawing (25 June 1917, original drawing in Archives, Office of the Building, Administration Building, Sears, Roebuck and Company Mail Order Plant, Chicago, Illinois). Drawn by Sears Department 131. 1/64 inch to one foot. Schematic plan of the Merchandise Building, describing the type of construction of the different portions of the building and shows the layout of the railroad tracks around the building. At the date of this drawing the building had all the major additons complete (to Annex A, Annex B, and the Box Factory). SCHETMATIC FLOOR PLAN - Sears Roebuck & Company Mail Order Plant, Merchandise Building, 924 South Homan Avenue, Chicago, Cook County, IL

  15. 112. Photographic copy of drawing (1912, original drawing in Archives, ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    112. Photographic copy of drawing (1912, original drawing in Archives, Office of the Building, Administration Building, Sears, Roebuck and Company Mail Order Plant, Chicago, Illinois). George C. Nimmons. 1/8 inch to one foot. This floor plan is the only original drawing for bays 11 and 12 (Grocery Building), constructed at the corner of Arthington (then called Harvard Street) and Central Park Avenue. The building was constructed in 1912 and designed by the firm of George C. Nimmons. This structure is on reinforced concrete construction. GROCERY BUILDING, BASEMENT FLOOR PLAN - Sears Roebuck & Company Mail Order Plant, Merchandise Building, 924 South Homan Avenue, Chicago, Cook County, IL

  16. 99. Photographic copy of drawing (15 March 1905, original drawing ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    99. Photographic copy of drawing (15 March 1905, original drawing in Archives, Office of the Building, Administration Building, Sears, Roebuck and Company Mail Order Plant, Chicago, Illinois). Nimmons and Fellows, E.C. and R.M. Shankland (Civil Engineers). 1/2 inch to one foot or as noted. Detail sheet includes wall section at the top of the tower. This drawing is excerpted from a blueprint set. TOWER PLANS AND DETAILS - Sears Roebuck & Company Mail Order Plant, Merchandise Building, 924 South Homan Avenue, Chicago, Cook County, IL

  17. 119. Photographic copy of drawing (26 April 1905, original drawing ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    119. Photographic copy of drawing (26 April 1905, original drawing in Archives, Office of the Building, Administration Building, Sears, Roebuck and Company Mail Order Plant, Chicago, Illinois). Adams and Schwab. 1/4 inch to one foot. Section drawing with the relationship of the spiral chutes in bays B and G to the shipping area. SECTION THROUGH MERCHANDISE BUILDING LOOKING EAST SHOWING SYSTEM OF CONVEYORS IN SHIPPING DEPARTMENT - Sears Roebuck & Company Mail Order Plant, Merchandise Building, 924 South Homan Avenue, Chicago, Cook County, IL

  18. 9. Credit JPL. Photographic copy of drawing, engineering drawing showing ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    9. Credit JPL. Photographic copy of drawing, engineering drawing showing structure of Test Stand 'A' (Building 4202/E-3) and its relationship to the Monitor Building or blockhouse (Building 4203/E-4) when a reinforced concrete machinery room was added to the west side of Test Stand 'A' in 1955. California Institute of Technology, Jet Propulsion Laboratory, Plant Engineering 'Electrical Layout - Muroc, Test Stand & Refrigeration Equipment Room,' drawing no. E3/7-0, April 6, 1955. - Jet Propulsion Laboratory Edwards Facility, Test Stand A, Edwards Air Force Base, Boron, Kern County, CA

  19. Pioneer Anomaly and Space Accelerometer for Gravity Test

    NASA Astrophysics Data System (ADS)

    Levy, Agnès; Christophe, Bruno; Reynaud, Serge

    2006-06-01

    The Pioneer 10 and 11 spacecraft are subject to an unexplained acceleration which has a constant value of (8.74 1.33) \\cdot 10-10 m\\cdot s-2 and seems to be directed toward the sun. The hypotheses to explain this anomaly are either technical artifacts or new physics. This presentation deals with the unfolding of two aspects of my thesis: Doppler and telemetry data analysis with the objective to investigate the nature of the anomaly, and adapation of an ONERA accelerometer for a future mission in which the anomaly will be confirmed and more precisely measured. The presence of an accelerometer is mandatory for the identification of the anomaly's origin.

  20. A Low Frequency FBG Accelerometer with Symmetrical Bended Spring Plates.

    PubMed

    Liu, Fufei; Dai, Yutang; Karanja, Joseph Muna; Yang, Minghong

    2017-01-22

    To meet the requirements for low-frequency vibration monitoring, a new type of FBG (fiber Bragg grating) accelerometer with a bended spring plate is proposed. Two symmetrical bended spring plates are used as elastic elements, which drive the FBG to produce axial strains equal in magnitude but opposite in direction when exciting vibrations exist, leading to doubling the wavelength shift of the FBG. The mechanics model and a numerical method are presented in this paper, with which the influence of the structural parameters on the sensitivity and the eigenfrequency are discussed. The test results show that the sensitivity of the accelerometer is more than 1000 pm/g when the frequency is within the 0.7-20 Hz range.

  1. A Low Frequency FBG Accelerometer with Symmetrical Bended Spring Plates

    PubMed Central

    Liu, Fufei; Dai, Yutang; Karanja, Joseph Muna; Yang, Minghong

    2017-01-01

    To meet the requirements for low-frequency vibration monitoring, a new type of FBG (fiber Bragg grating) accelerometer with a bended spring plate is proposed. Two symmetrical bended spring plates are used as elastic elements, which drive the FBG to produce axial strains equal in magnitude but opposite in direction when exciting vibrations exist, leading to doubling the wavelength shift of the FBG. The mechanics model and a numerical method are presented in this paper, with which the influence of the structural parameters on the sensitivity and the eigenfrequency are discussed. The test results show that the sensitivity of the accelerometer is more than 1000 pm/g when the frequency is within the 0.7–20 Hz range. PMID:28117740

  2. Guidelines for Standardized Testing of Broadband Seismometers and Accelerometers

    USGS Publications Warehouse

    Hutt, Charles R.; Evans, John R.; Followill, Fred; Nigbor, Robert L.; Wielandt, Erhard

    2010-01-01

    Testing and specification of seismic and earthquake-engineering sensors and recorders has been marked by significant variations in procedures and selected parameters. These variations cause difficulty in comparing such specifications and test results. In July 1989, and again in May 2005, the U.S. Geological Survey hosted international pub-lic/private workshops with the goal of defining widely accepted guidelines for the testing of seismological inertial sensors, seismometers, and accelerometers. The Proceedings of the 2005 workshop have been published and include as appendix 6 the report of the 1989 workshop. This document represents a collation and rationalization of a single set of formal guidelines for testing and specifying broadband seismometers and accelerometers.

  3. Champ Accelerometer: Evaluation and Contribution To The Gravity Mission

    NASA Astrophysics Data System (ADS)

    Perosanz, F.; Loyer, S.; Bruinsma, S.; Tamagnan, D.; Lemoine, J. M.; Biancale, R.; Fayard, T.; Vales, N.; Touboul, P.

    The STAR accelerometer on-board the German CHAMP satellite delivers non- gravitational accelerations with an unprecedented resolution. This study presents the global evaluation of the instrument in terms of continuous measurement and "House Keeping" parameters surveying, a posteriori calibration strategy and results and mis- function analysis and correction. In addition the contribution of the STAR accelerom- eter to dynamic orbit computation and gravity modelling is evaluated. Different orbit fit solutions and geoid models resulting from gravity field test models are compared.

  4. High resolution interface circuit for closed-loop accelerometer

    NASA Astrophysics Data System (ADS)

    Liang, Yin; Xiaowei, Liu; Weiping, Chen; Zhiping, Zhou

    2011-04-01

    This paper reports a low noise switched-capacitor CMOS interface circuit for the closed-loop operation of a capacitive accelerometer. The time division multiplexing of the same electrode is adopted to avoid the strong feedthrough between capacitance sensing and electrostatic force feedback. A PID controller is designed to ensure the stability and dynamic response of a high Q closed-loop accelerometer with a vacuum package. The architecture only requires single ended operational amplifiers, transmission gates and capacitors. Test results show that a full scale acceleration of ±3 g, non-linearity of 0.05% and signal bandwidth of 1000 Hz are achieved. The complete module operates from a ±5 V supply and has a measured sensitivity of 1.2 V/g with a noise of floor of in closed-loop. The chip is fabricated in the 2 μm two-metal and two-poly n-well CMOS process with an area of 15.2 mm2. These results prove that this circuit is suitable for high performance micro-accelerometer applications like seismic detection and oil exploration.

  5. Measuring gravitation near Mercury: the contribution of ISA accelerometer

    NASA Astrophysics Data System (ADS)

    Iafolla, Valerio; Peron, Roberto; Lucchesi, David; Santoli, Francesco; Lefevre, Carlo; Fiorenza, Emiliano; Nozzoli, Sergio; Lucente, Marco; Magnafico, Carmelo

    2012-07-01

    The forthcoming BepiColombo mission for the exploration of the planet Mercury will include a comprehensive set of experiments --- the so--called Radio Science Experiments (RSE) --- in order to measure the gravitational field of the planet, its rotation, and to perform precise tests of Einstein's general theory of relativity. Fundamental piece of RSE is the high--sensitivity ISA (Italian Spring Accelerometer) accelerometer. It will directly measure the strong non--gravitational perturbations acting on Mercury Planetary Orbiter spacecraft, which are an important source of error in the RSE meaurements. Being the first time for an high--sensitivity accelerometer onboard an interplanetary mission, a number of choices had to be made and several issues had to be faced in the design phases. Following a general description of the instrument scientific objectives, its working and operations will be described. Emphasis will be given on the complex calibration procedures required in the various mission phases and on the integration of the measurements with the overall RSE operations and data analysis.

  6. Citizen Sensors for SHM: Use of Accelerometer Data from Smartphones

    PubMed Central

    Feng, Maria; Fukuda, Yoshio; Mizuta, Masato; Ozer, Ekin

    2015-01-01

    Ubiquitous smartphones have created a significant opportunity to form a low-cost wireless Citizen Sensor network and produce big data for monitoring structural integrity and safety under operational and extreme loads. Such data are particularly useful for rapid assessment of structural damage in a large urban setting after a major event such as an earthquake. This study explores the utilization of smartphone accelerometers for measuring structural vibration, from which structural health and post-event damage can be diagnosed. Widely available smartphones are tested under sinusoidal wave excitations with frequencies in the range relevant to civil engineering structures. Large-scale seismic shaking table tests, observing input ground motion and response of a structural model, are carried out to evaluate the accuracy of smartphone accelerometers under operational, white-noise and earthquake excitations of different intensity. Finally, the smartphone accelerometers are tested on a dynamically loaded bridge. The extensive experiments show satisfactory agreements between the reference and smartphone sensor measurements in both time and frequency domains, demonstrating the capability of the smartphone sensors to measure structural responses ranging from low-amplitude ambient vibration to high-amplitude seismic response. Encouraged by the results of this study, the authors are developing a citizen-engaging and data-analytics crowdsourcing platform towards a smartphone-based Citizen Sensor network for structural health monitoring and post-event damage assessment applications. PMID:25643056

  7. 25. Photographic copy of construction drawing 1957 (original drawing located ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    25. Photographic copy of construction drawing 1957 (original drawing located in Building 301, Offutt AFB, Bellevue, Nebraska). Elevations, plans,and sections for galvanized-steel wall and roof cladding, dock nos. 491, 492, and 493. - Offutt Air Force Base, Looking Glass Airborne Command Post, Nose Docks, On either side of Hangar Access Apron at Northwest end of Project Looking Glass Historic District, Bellevue, Sarpy County, NE

  8. 102. Photographic copy of drawing (1905, original drawing in Archives, ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    102. Photographic copy of drawing (1905, original drawing in Archives, Office of the Building, Administration Building, Sears, Roebuck and Company Mail Order Plant, Chicago, Illinois). Nimmons and Fellows. 1/8 inch to one foot. Section through train shed, including the elevation of the curved wall of the end bay. Opposite hand section provided in field record. NORTH ELEVATION - ANNEX A - Sears Roebuck & Company Mail Order Plant, Merchandise Building, 924 South Homan Avenue, Chicago, Cook County, IL

  9. 96. Photographic copy of drawing (February 1905, original drawing in ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    96. Photographic copy of drawing (February 1905, original drawing in Archives, Office of the Building, Administration Building, Sears, Roebuck and Company Mail Order Plant, Chicago, Illinois). Nimmons and Fellows. 1/8 inch to one foot. Elevation of the west face showing the original 1905 construction, where Annex A and B were built to a height of three floors. WEST ELEVATION - Sears Roebuck & Company Mail Order Plant, Merchandise Building, 924 South Homan Avenue, Chicago, Cook County, IL

  10. 106. Photographic copy of drawing (1905, original drawing in Archives, ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    106. Photographic copy of drawing (1905, original drawing in Archives, Office of the Building, Administration Building, Sears, Roebuck and Company Mail Order Plant, Chicago, Illinois). Nimmons and Fellows. 1/8 inch to one foot. Section through annexes and train shed, with elevation of the nine story portion of warehouse. TRANSVERSE SECTION - ANNEX A AND ANNEX B - Sears Roebuck & Company Mail Order Plant, Merchandise Building, 924 South Homan Avenue, Chicago, Cook County, IL

  11. 17. Photographic copy of drawing (4 November 1927, original drawing ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    17. Photographic copy of drawing (4 November 1927, original drawing in Archives, Office of the Building, Administration Building, Sears, Roebuck and Company Mail Order Plant, Chicago, Illinois). Drawn by Sears Department 198. Approximately 1/8 inch to 12 feet. Shows major buildings of complex without curb lines and block boundaries marked only at corners. SITE PLAN - Sears Roebuck & Company Mail Order Plant, Bounded by Lexington & Grenshaw Streets, Kedzie Avenue & Independence Boulevard, Chicago, Cook County, IL

  12. 105. Photographic copy of drawing (1905, original drawing in Archives, ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    105. Photographic copy of drawing (1905, original drawing in Archives, Office of the Building, Administration Building, Sears, Roebuck and Company Mail Order Plant, Chicago, Illinois). Nimmons and Fellows. 1/8 inch to one foot. Shows elevation of the train shed, the curved fascade of Annex A, and Annex B before the Grocery Building was constructed. WEST ELEVATION - ANNEX A AND ANNEX B - Sears Roebuck & Company Mail Order Plant, Merchandise Building, 924 South Homan Avenue, Chicago, Cook County, IL

  13. 103. Photographic copy of drawing (1905, original drawing in Archives, ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    103. Photographic copy of drawing (1905, original drawing in Archives, Office of the Building, Administration Building, Sears, Roebuck and Company Mail Order Plant, Chicago, Illinois). Nimmons and Fellows. 1/8 inch to one foot. South elevation adjacent to the railroad tracks; only the first three floors were built at that time. SOUTH ELEVATION - ANNEX A - Sears Roebuck & Company Mail Order Plant, Merchandise Building, 924 South Homan Avenue, Chicago, Cook County, IL

  14. 104. Photographic copy of drawing (1905, original drawing in Archives, ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    104. Photographic copy of drawing (1905, original drawing in Archives, Office of the Building, Administration Building, Sears, Roebuck and Company Mail Order Plant, Chicago, Illinois). Nimmons and Fellows. 1/8 inch to one foot. North elevation along Arthington Street (then Harvard Street); only the first three floors were built at that time. NORTH ELEVATION - ANNEX B - Sears Roebuck & Company Mail Order Plant, Merchandise Building, 924 South Homan Avenue, Chicago, Cook County, IL

  15. 129. Photographic copy of drawing (24 June 1963, original drawing ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    129. Photographic copy of drawing (24 June 1963, original drawing in Archives, Public Affairs Departmentm, Sears Merchandise Group, Hoffman Estates, Illinois). Swain and Meyers, Inc. 1/4 inch to one foot. Partial floor plan illustrating the layout of the large package handling area. Tables and equipment not present at the time of the survey are shown. SECOND FLOOR, SECTON B - Sears Roebuck & Company Mail Order Plant, Merchandise Building, 924 South Homan Avenue, Chicago, Cook County, IL

  16. 23. Photocopy of Drawing (November 1934 Architectural Drawings by Burge ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    23. Photocopy of Drawing (November 1934 Architectural Drawings by Burge and Stevens, in Possession of the Engineering and Capital Improvements Department of the Atlanta Housing Authority, Atlanta, Georgia). TYPICAL WALL SECTION AND ELEVATION, TYPICAL DETAILS OF HEAD, SILL, BASE, JAMB, AND METAL DOOR FRAMES, DETAIL OF STONE COPING, AND STONE SILL ALTERNATE, LINTEL SCHEDULE, TECHWOOD PROJECT #1101, SHEET A-51. - Techwood Homes, Building No. 1, 575-579 Techwood Drive, Atlanta, Fulton County, GA

  17. 15. Photocopy of Drawing (November 1934 Architectural Drawings by Burge ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    15. Photocopy of Drawing (November 1934 Architectural Drawings by Burge and Stevens, in Possession of the Engineering and Capital Improvements Department of the Atlanta Housing Authority, Atlanta, Georgia). DETAILS OF NORTH ELEVATION, STORE FRONT, SCREEN IN GENERAL WAITING ROOM, COUNTER IN RENTING OFFICE, AND COUNTER IN CASHIER'S OFFICE, ADMINISTRATION BUILDING AND STORE, TECHWOOD PROJECT #1101, SHEET A-57. - Techwood Homes, Store & Administration Building, 114-138 Merrit Avenue, Atlanta, Fulton County, GA

  18. 22. Photocopy of Drawing (November 1934 Architectural Drawings by Burge ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    22. Photocopy of Drawing (November 1934 Architectural Drawings by Burge and Stevens, in Possession of the Engineering and Capital Improvements Department of the Atlanta Housing Authority, Atlanta, Georgia). SECTION AND ELEVATION, TYPE 'A' STAIR AND ENTRY, SECTION AND ELEVATION, TYPE 'C' AND 'D' STAIR AND ENTRY, TECHWOOD PROJECT #1101, SHEET A-50. - Techwood Homes, Building No. 1, 575-579 Techwood Drive, Atlanta, Fulton County, GA

  19. 113. Photographic copy of drawing (17 MAY 1916, original drawing ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    113. Photographic copy of drawing (17 MAY 1916, original drawing in Archives, Public Affairs Department, Sears Merchandise Group, Hoffman Estates, Illinois). Nimmons and Fellows. 1/8 inch to one foot. Elevation along the train shed. Second addition to Annex A. NORTH ELEVATION (ANNEX, BAYS L, M, N, AND O, FOR FLOORS FOUR THROUGH NINE) - Sears Roebuck & Company Mail Order Plant, Merchandise Building, 924 South Homan Avenue, Chicago, Cook County, IL

  20. 115. Photographic copy of drawing (17 May 1916, original drawing ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    115. Photographic copy of drawing (17 May 1916, original drawing in Archives, Public Affairs Department, Sears Merchandise Group, Hoffman Estates, Illinois). Nimmons and Fellows. 1/8 inch to one foot. Shows the curved end bay of the warehouse. Second addition to Annex A. WEST ELEVATION (ANNEX A, BAYS L, M, N, AND O, FOR FLOORS FOUR THROUGH NINE) - Sears Roebuck & Company Mail Order Plant, Merchandise Building, 924 South Homan Avenue, Chicago, Cook County, IL

  1. 114. Photographic copy of drawing (17 May 1916, original drawing ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    114. Photographic copy of drawing (17 May 1916, original drawing in Archives, Public Affairs Department, Sears Merchandise Group, Hoffman Estates, Illinois). Nimmons and Fellows. 1/8 inch to one foot. Elevation adjacent to the railroad tracks. Second addition to Annex A. SOUTH ELEVATION (ANNEX A, BAYS L, M, N, N, AND O, FOR FLOORS FOUR THROUGH NINE) - Sears Roebuck & Company Mail Order Plant, Merchandise Building, 924 South Homan Avenue, Chicago, Cook County, IL

  2. 98. Photographic copy of drawing (15 March 1905, original drawing ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    98. Photographic copy of drawing (15 March 1905, original drawing in Archives, Public Affairs Department, Sears Merchandise Group, Hoffman Estates, Illinois). Nimmons and Fellows. 1/2 inch to one foot or as noted Detail sheet includes elevation details at the top of the tower. TOWER PLANS AND DETAILS - Sears Roebuck & Company Mail Order Plant, Merchandise Building, 924 South Homan Avenue, Chicago, Cook County, IL

  3. HippoDraw and Hippoplotamus

    SciTech Connect

    Gravina, M.F.; Kunz, P.F.; Pavel, T.J.; Rensing, P.E.

    1992-02-01

    Hippo Draw is a result of research into finding better ways to visualize the kind of statistical data that is so common in high energy physics analyses. In these analyses, frequency distributions are visualized as histograms, contour plots, scatter plots, etc. Traditionally, one used a library of subroutines, called a histogram package, within one's analysis programs to create and display such distributions. HippoDraw is a NeXTstep application for viewing statistical data. It has several unique features which make viewing data distributions highly interactive. It also incorporates simple drawing tools. HippoDraw is written in Objective-C and uses the Hippoplotamus library package which handles the n-tuples and displays. Hippoplotamus is written in ANSI C. 4 refs.

  4. HippoDraw and Hippoplotamus

    SciTech Connect

    Gravina, M.F.; Kunz, P.F.; Pavel, T.J.; Rensing, P.E.

    1992-02-01

    Hippo Draw is a result of research into finding better ways to visualize the kind of statistical data that is so common in high energy physics analyses. In these analyses, frequency distributions are visualized as histograms, contour plots, scatter plots, etc. Traditionally, one used a library of subroutines, called a histogram package, within one`s analysis programs to create and display such distributions. HippoDraw is a NeXTstep application for viewing statistical data. It has several unique features which make viewing data distributions highly interactive. It also incorporates simple drawing tools. HippoDraw is written in Objective-C and uses the Hippoplotamus library package which handles the n-tuples and displays. Hippoplotamus is written in ANSI C. 4 refs.

  5. Development of a quartz digital accelerometer for environmental sensing and navigation applications

    SciTech Connect

    Kass, W.J.; Vianco, P.T.

    1993-03-01

    A quartz digital accelerometer has been developed which uses double ended tuning forks as the active sensing elements. The authors have demonstrated the ability of this accelerometer to be capable of acceleration measurements between {+-}150G with {+-}0.5G accuracy. They have further refined the original design and assembly processes to produce accelerometers with < 1mG stability in inertial measurement applications. This report covers the development, design, processing, assembly, and testing of these devices.

  6. System Wide Joint Position Sensor Fault Tolerance in Robot Systems Using Cartesian Accelerometers

    NASA Technical Reports Server (NTRS)

    Aldridge, Hal A.; Juang, Jer-Nan

    1997-01-01

    Joint position sensors are necessary for most robot control systems. A single position sensor failure in a normal robot system can greatly degrade performance. This paper presents a method to obtain position information from Cartesian accelerometers without integration. Depending on the number and location of the accelerometers. the proposed system can tolerate the loss of multiple position sensors. A solution technique suitable for real-time implementation is presented. Simulations were conducted using 5 triaxial accelerometers to recover from the loss of up to 4 joint position sensors on a 7 degree of freedom robot moving in general three dimensional space. The simulations show good estimation performance using non-ideal accelerometer measurements.

  7. The location of the tibial accelerometer does influence impact acceleration parameters during running.

    PubMed

    Lucas-Cuevas, Angel Gabriel; Encarnación-Martínez, Alberto; Camacho-García, Andrés; Llana-Belloch, Salvador; Pérez-Soriano, Pedro

    2016-10-03

    Tibial accelerations have been associated with a number of running injuries. However, studies attaching the tibial accelerometer on the proximal section are as numerous as those attaching the accelerometer on the distal section. This study aimed to investigate whether accelerometer location influences acceleration parameters commonly reported in running literature. To fulfil this purpose, 30 athletes ran at 2.22, 2.78 and 3.33 m · s(-1) with three accelerometers attached with double-sided tape and tightened to the participants' tolerance on the forehead, the proximal section of the tibia and the distal section of the tibia. Time-domain (peak acceleration, shock attenuation) and frequency-domain parameters (peak frequency, peak power, signal magnitude and shock attenuation in both the low and high frequency ranges) were calculated for each of the tibial locations. The distal accelerometer registered greater tibial acceleration peak and shock attenuation compared to the proximal accelerometer. With respect to the frequency-domain analysis, the distal accelerometer provided greater values of all the low-frequency parameters, whereas no difference was observed for the high-frequency parameters. These findings suggest that the location of the tibial accelerometer does influence the acceleration signal parameters, and thus, researchers should carefully consider the location they choose to place the accelerometer so that equivalent comparisons across studies can be made.

  8. Self-calibration method of the bias of a space electrostatic accelerometer.

    PubMed

    Qu, Shao-Bo; Xia, Xiao-Mei; Bai, Yan-Zheng; Wu, Shu-Chao; Zhou, Ze-Bing

    2016-11-01

    The high precision space electrostatic accelerometer is an instrument to measure the non-gravitational forces acting on a spacecraft. It is one of the key payloads for satellite gravity measurements and space fundamental physics experiments. The measurement error of the accelerometer directly affects the precision of gravity field recovery for the earth. This paper analyzes the sources of the bias according to the operating principle and structural constitution of the space electrostatic accelerometer. Models of bias due to the asymmetry of the displacement sensing system, including the mechanical sensor head and the capacitance sensing circuit, and the asymmetry of the feedback control actuator circuit are described separately. According to the two models, a method of bias self-calibration by using only the accelerometer data is proposed, based on the feedback voltage data of the accelerometer before and after modulating the DC biasing voltage (Vb) applied on its test mass. Two types of accelerometer biases are evaluated separately using in-orbit measurement data of a space electrostatic accelerometer. Based on the preliminary analysis, the bias of the accelerometer onboard of an experiment satellite is evaluated to be around 10(-4) m/s(2), about 4 orders of magnitude greater than the noise limit. Finally, considering the two asymmetries, a comprehensive bias model is analyzed. A modified method to directly calibrate the accelerometer comprehensive bias is proposed.

  9. Self-calibration method of the bias of a space electrostatic accelerometer

    NASA Astrophysics Data System (ADS)

    Qu, Shao-Bo; Xia, Xiao-Mei; Bai, Yan-Zheng; Wu, Shu-Chao; Zhou, Ze-Bing

    2016-11-01

    The high precision space electrostatic accelerometer is an instrument to measure the non-gravitational forces acting on a spacecraft. It is one of the key payloads for satellite gravity measurements and space fundamental physics experiments. The measurement error of the accelerometer directly affects the precision of gravity field recovery for the earth. This paper analyzes the sources of the bias according to the operating principle and structural constitution of the space electrostatic accelerometer. Models of bias due to the asymmetry of the displacement sensing system, including the mechanical sensor head and the capacitance sensing circuit, and the asymmetry of the feedback control actuator circuit are described separately. According to the two models, a method of bias self-calibration by using only the accelerometer data is proposed, based on the feedback voltage data of the accelerometer before and after modulating the DC biasing voltage (Vb) applied on its test mass. Two types of accelerometer biases are evaluated separately using in-orbit measurement data of a space electrostatic accelerometer. Based on the preliminary analysis, the bias of the accelerometer onboard of an experiment satellite is evaluated to be around 10-4 m/s2, about 4 orders of magnitude greater than the noise limit. Finally, considering the two asymmetries, a comprehensive bias model is analyzed. A modified method to directly calibrate the accelerometer comprehensive bias is proposed.

  10. 123. Photographic copy of drawing (6 October 1916, original drawing ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    123. Photographic copy of drawing (6 October 1916, original drawing in Archives, Office of the Building, Administration Building, Sears Roebuck and Company Mail Order Plant, Chicago, Illinois). Drawn by Sears Department 213 (engineer unknown). 1/16 inch to one foot. Partial fourth/fifth floor plan and schematic building section showing the relationship of the gravity conveyors in the warehouse space to the spiral chutes. GENERAL LAYOUT OF ALL MDSE DEPT. CONVEYORS - Sears Roebuck & Company Mail Order Plant, Merchandise Building, 924 South Homan Avenue, Chicago, Cook County, IL

  11. 18. Photographic copy of drawing (16 October 1960, original drawing ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    18. Photographic copy of drawing (16 October 1960, original drawing in Archives, Office of the Building, Administration Building, Sears, Roebuck and Company Mail Order Plant, Chicago, Illinois). Prepared by Sears Departments 730 and 824. One inch to 100 feet. Area shown extends from the Eisenhower Expressway on the north to Roosevelt Road on the south, including all the major buildings of the complex except for parking garages and the Catalogue Operations Building added circa 1964. PLOT OF SEARS COMPLEX - HOMAN-ARTHINGTON AREA - Sears Roebuck & Company Mail Order Plant, Bounded by Lexington & Grenshaw Streets, Kedzie Avenue & Independence Boulevard, Chicago, Cook County, IL

  12. 101. Photographic copy of drawing (1905, original drawing in Archives, ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    101. Photographic copy of drawing (1905, original drawing in Archives, Office of the Building, Administration Building, Sears, Roebuck and Company Mail Order Plant, Chicago, Illinois). Nimmons and Fellows. 1/8 inch to one foot. First floor plan for the portions of Annex A and Annex B built in 1905 (three floor only) along with the nine floors along Homan Avenue. FIRST FLOOR PLAN - ANNEX A AND ANNEX B - Sears Roebuck & Company Mail Order Plant, Merchandise Building, 924 South Homan Avenue, Chicago, Cook County, IL

  13. Equating accelerometer estimates among youth: the Rosetta Stone 2

    PubMed Central

    Brazendale, Keith; Beets, Michael W.; Bornstein, Daniel B.; Moore, Justin B.; Pate, Russell R.; Weaver, Robert G.; Falck, Ryan S.; Chandler, Jessica L.; Andersen, Lars B.; Anderssen, Sigmund A.; Cardon, Greet; Cooper, Ashley; Davey, Rachel; Froberg, Karsten; Hallal, Pedro C.; Janz, Kathleen F.; Kordas, Katarzyna; Kriemler, Susi; Puder, Jardena J.; Reilly, John J.; Salmon, Jo; Sardinha, Luis B.; Timperio, Anna; van Sluijs, Esther MF

    2017-01-01

    Objectives Different accelerometer cutpoints used by different researchers often yields vastly different estimates of moderate-to-vigorous intensity physical activity (MVPA). This is recognized as cutpoint non-equivalence (CNE), which reduces the ability to accurately compare youth MVPA across studies. The objective of this research is to develop a cutpoint conversion system that standardizes minutes of MVPA for six different sets of published cutpoints. Design Secondary data analysis Methods Data from the International Children’s Accelerometer Database (ICAD; Spring 2014) consisting of 43,112 Actigraph accelerometer data files from 21 worldwide studies (children 3-18 years, 61.5% female) were used to develop prediction equations for six sets of published cutpoints. Linear and non-linear modeling, using a leave one out cross-validation technique, was employed to develop equations to convert MVPA from one set of cutpoints into another. Bland Altman plots illustrate the agreement between actual MVPA and predicted MVPA values. Results Across the total sample, mean MVPA ranged from 29.7 MVPA min.d-1 (Puyau) to 126.1 MVPA min.d-1 (Freedson 3 METs). Across conversion equations, median absolute percent error was 12.6% (range: 1.3 to 30.1) and the proportion of variance explained ranged from 66.7% to 99.8%. Mean difference for the best performing prediction equation (VC from EV) was -0.110 min.d-1 (limits of agreement (LOA), -2.623 to 2.402). The mean difference for the worst performing prediction equation (FR3 from PY) was 34.76 min.d-1 (LOA, -60.392 to 129.910). Conclusions For six different sets of published cutpoints, the use of this equating system can assist individuals attempting to synthesize the growing body of literature on Actigraph, accelerometry-derived MVPA. PMID:25747468

  14. Interest of the MICROSTAR Accelerometer to improve the GRASP Mission.

    NASA Astrophysics Data System (ADS)

    Perrot, E.; Lebat, V.; Foulon, B.; Christophe, B.; Liorzou, F.; Huynh, P. A.

    2015-12-01

    The Geodetic Reference Antenna in Space (GRASP) is a micro satellite mission concept proposed by JPL to improve the definition of the Terrestrial Reference Frame (TRF). GRASP collocates GPS, SLR, VLBI, and DORIS sensors on a dedicated spacecraft in order to establish precise and stable ties between the key geodetic techniques used to define and disseminate the TRF. GRASP also offers a space-based reference antenna for the present and future Global Navigation Satellite Systems (GNSS). By taking advantage of the new testing possibilities offer by the catapult facility at the ZARM drop tower, the ONERA's space accelerometer team proposes an up-dated version, called MICROSTAR, of its ultra sensitive electrostatic accelerometers which have contributed to the success of the last Earth's gravity missions GRACE and GOCE. Built around a cubic proof-mass, it provides the 3 linear accelerations with a resolution better than 10-11 ms-2/Hz1/2 into a measurement bandwidth between 10-3 Hz and 0.1 Hz and the 3 angular accelerations about its 3 orthogonal axes with 5´10-10 rad.s-2/Hz1/2 resolution. Integrated at the centre of mass of the satellite, MICROSTAR improves the Precise Orbit Determination (POD) by accurate measurement of the non-gravitational force acting on the satellite. It offers also the possibility to calibrate the change in the position of the satellite center of mass with an accuracy better than 100 μm as demonstrated in the GRACE mission. Assuming a sufficiently rigid structure between the antennas and the accelerometer, its data can participate to reach the mission objective of 1 mm precision for the TRF position.

  15. Piezoelectric Shaker Development for High Frequency Calibration of Accelerometers

    SciTech Connect

    Payne, Bev; Harper, Kari K.; Vogl, Gregory W.

    2010-05-28

    Calibration of vibration transducers requires sinusoidal motion over a wide frequency range with low distortion and low cross-axial motion. Piezoelectric shakers are well suited to generate such motion and are suitable for use with laser interferometric methods at frequencies of 3 kHz and above. An advantage of piezoelectric shakers is the higher achievable accelerations and displacement amplitudes as compared to electro-dynamic (ED) shakers. Typical commercial ED calibration shakers produce maximum accelerations from 100 m/s{sup 2} to 500 m/s{sup 2}. Very large ED shakers may produce somewhat higher accelerations but require large amplifiers and expensive cooling systems to dissipate heat. Due to the limitations in maximum accelerations by ED shakers at frequencies above 5 kHz, the amplitudes of the generated sinusoidal displacement are frequently below the resolution of laser interferometers used in primary calibration methods. This limits the usefulness of ED shakers in interferometric based calibrations at higher frequencies.Small piezoelectric shakers provide much higher acceleration and displacement amplitudes for frequencies above 5 kHz, making these shakers very useful for accelerometer calibrations employing laser interferometric measurements, as will be shown in this paper. These piezoelectric shakers have been developed and used at NIST for many years for high frequency calibration of accelerometers. This paper documents the construction and performance of a new version of these shakers developed at NIST for the calibration of accelerometers over the range of 3 kHz to 30 kHz and possibly higher. Examples of typical calibration results are also given.

  16. ISA accelerometer onboard the Mercury Planetary Orbiter: error budget

    NASA Astrophysics Data System (ADS)

    Iafolla, Valerio; Lucchesi, David M.; Nozzoli, Sergio; Santoli, Francesco

    2007-03-01

    We have estimated a preliminary error budget for the Italian Spring Accelerometer (ISA) that will be allocated onboard the Mercury Planetary Orbiter (MPO) of the European Space Agency (ESA) space mission to Mercury named BepiColombo. The role of the accelerometer is to remove from the list of unknowns the non-gravitational accelerations that perturb the gravitational trajectory followed by the MPO in the strong radiation environment that characterises the orbit of Mercury around the Sun. Such a role is of fundamental importance in the context of the very ambitious goals of the Radio Science Experiments (RSE) of the BepiColombo mission. We have subdivided the errors on the accelerometer measurements into two main families: (i) the pseudo-sinusoidal errors and (ii) the random errors. The former are characterised by a periodic behaviour with the frequency of the satellite mean anomaly and its higher order harmonic components, i.e., they are deterministic errors. The latter are characterised by an unknown frequency distribution and we assumed for them a noise-like spectrum, i.e., they are stochastic errors. Among the pseudo-sinusoidal errors, the main contribution is due to the effects of the gravity gradients and the inertial forces, while among the random-like errors the main disturbing effect is due to the MPO centre-of-mass displacements produced by the onboard High Gain Antenna (HGA) movements and by the fuel consumption and sloshing. Very subtle to be considered are also the random errors produced by the MPO attitude corrections necessary to guarantee the nadir pointing of the spacecraft. We have therefore formulated the ISA error budget and the requirements for the satellite in order to guarantee an orbit reconstruction for the MPO spacecraft with an along-track accuracy of about 1 m over the orbital period of the satellite around Mercury in such a way to satisfy the RSE requirements.

  17. MEMS capacitive accelerometer-based middle ear microphone.

    PubMed

    Young, Darrin J; Zurcher, Mark A; Semaan, Maroun; Megerian, Cliff A; Ko, Wen H

    2012-12-01

    The design, implementation, and characterization of a microelectromechanical systems (MEMS) capacitive accelerometer-based middle ear microphone are presented in this paper. The microphone is intended for middle ear hearing aids as well as future fully implantable cochlear prosthesis. Human temporal bones acoustic response characterization results are used to derive the accelerometer design requirements. The prototype accelerometer is fabricated in a commercial silicon-on-insulator (SOI) MEMS process. The sensor occupies a sensing area of 1 mm × 1 mm with a chip area of 2 mm × 2.4 mm and is interfaced with a custom-designed low-noise electronic IC chip over a flexible substrate. The packaged sensor unit occupies an area of 2.5 mm × 6.2 mm with a weight of 25 mg. The sensor unit attached to umbo can detect a sound pressure level (SPL) of 60 dB at 500 Hz, 35 dB at 2 kHz, and 57 dB at 8 kHz. An improved sound detection limit of 34-dB SPL at 150 Hz and 24-dB SPL at 500 Hz can be expected by employing start-of-the-art MEMS fabrication technology, which results in an articulation index of approximately 0.76. Further micro/nanofabrication technology advancement is needed to enhance the microphone sensitivity for improved understanding of normal conversational speech.

  18. Accelerometer Placement for the International Space Station Node Modal Test

    NASA Technical Reports Server (NTRS)

    Tinker, Michael L.

    1998-01-01

    Accelerometer location analysis for the modal survey test of the International Space Station Node is described. Three different approaches were utilized: (1) Guyan reduction; (2) Iterative Guyan reduction; and (3) The average driving point residue (ADPR) method. Both Guyan approaches worked well, but poor results were observed for the ADPR method. Although the iterative Guyan approach appears to provide the best set of sensor locations, it is intensive computationally, becoming impractical for large initial location sets. While this is computer dependent, it appears that initial sets larger than about 1500 degrees of freedom are impractical for the iterative technique.

  19. Self-powered In-plane Accelerometer Using Triboelectric Mechanism

    NASA Astrophysics Data System (ADS)

    Gupta, Rahul Kumar; Dhakar, Lokesh; Lee, Chengkuo

    2016-11-01

    This paper presents a self-powered triboelectric based accelerometer to detect wide range of in-plane acceleration utilizing the triboelectric mechanism. The freestanding sliding mode was utilized to realize the in-plane sensing. The fabricated device consists of soft polymer spring which displays wide detection range from ±1g to ±6g (g = 9.8m/s2) in x and y directions with sensitivity of 21mV/(g). The proposed device can be utilized for self-powered shock sensing in various future applications.

  20. Deep drawing of uranium metal

    SciTech Connect

    Jackson, R J; Lundberg, M R

    1987-01-19

    A procedure was developed to fabricate uranium forming blanks with high ''draw-ability'' so that cup shapes could be easily and uniformly deep drawn. The overall procedure involved a posttreatment to develop optimum mechanical and structural properties in the deep-drawn cups. The fabrication sequence is casting high-purity logs, pucking cast logs, cross-rolling pucks to forming blanks, annealing and outgassing forming blanks, cold deep drawing to hemispherical shapes, and stress relieving, outgassing, and annealing deep-drawn parts to restore ductility and impart dimensional stability. The fabrication development and the resulting fabrication procedure are discussed in detail. The mechanical properties and microstructural properties are discussed.

  1. Dynamic Fluid in a Porous Transducer-Based Angular Accelerometer

    PubMed Central

    Cheng, Siyuan; Fu, Mengyin; Wang, Meiling; Ming, Li; Fu, Huijin; Wang, Tonglei

    2017-01-01

    This paper presents a theoretical model of the dynamics of liquid flow in an angular accelerometer comprising a porous transducer in a circular tube of liquid. Wave speed and dynamic permeability of the transducer are considered to describe the relation between angular acceleration and the differential pressure on the transducer. The permeability and streaming potential coupling coefficient of the transducer are determined in the experiments, and special prototypes are utilized to validate the theoretical model in both the frequency and time domains. The model is applied to analyze the influence of structural parameters on the frequency response and the transient response of the fluidic system. It is shown that the radius of the circular tube and the wave speed affect the low frequency gain, as well as the bandwidth of the sensor. The hydrodynamic resistance of the transducer and the cross-section radius of the circular tube can be used to control the transient performance. The proposed model provides the basic techniques to achieve the optimization of the angular accelerometer together with the methodology to control the wave speed and the hydrodynamic resistance of the transducer. PMID:28230793

  2. Microelectromechanical Resonant Accelerometer Designed with a High Sensitivity

    PubMed Central

    Zhang, Jing; Su, Yan; Shi, Qin; Qiu, An-Ping

    2015-01-01

    This paper describes the design and experimental evaluation of a silicon micro-machined resonant accelerometer (SMRA). This type of accelerometer works on the principle that a proof mass under acceleration applies force to two double-ended tuning fork (DETF) resonators, and the frequency output of two DETFs exhibits a differential shift. The dies of an SMRA are fabricated using silicon-on-insulator (SOI) processing and wafer-level vacuum packaging. This research aims to design a high-sensitivity SMRA because a high sensitivity allows for the acceleration signal to be easily demodulated by frequency counting techniques and decreases the noise level. This study applies the energy-consumed concept and the Nelder-Mead algorithm in the SMRA to address the design issues and further increase its sensitivity. Using this novel method, the sensitivity of the SMRA has been increased by 66.1%, which attributes to both the re-designed DETF and the reduced energy loss on the micro-lever. The results of both the closed-form and finite-element analyses are described and are in agreement with one another. A resonant frequency of approximately 22 kHz, a frequency sensitivity of over 250 Hz per g, a one-hour bias stability of 55 μg, a bias repeatability (1σ) of 48 μg and the bias-instability of 4.8 μg have been achieved. PMID:26633425

  3. ISA accelerometer: fundamental support for the exploration of planet Mercury

    NASA Astrophysics Data System (ADS)

    Iafolla, Valerio; Fiorenza, Emiliano; Lefevre, Carlo; Nozzoli, Sergio; Peron, Roberto; Reale, Andrea; Santoli, Francesco

    2010-05-01

    The development of BepiColombo mission is proceeding, in view of the launch, foreseen for 2014. This mission will perform a thorough study of the planet Mercury and its environment. An important set of scientific objectives is constituted by the so-called Radio Science Experiments (RSE), which will study the gravitational field and rotation of the planet, and will perform very precise tests of general relativity theory. In order to reach the required level of accuracy in recovering the relevant parameters, the data coming from the high-sensitivity ISA (Italian Spring Accelerometer) instrument onboard the Mercury Planetary Orbiter (MPO) will be used: this will be the first time for a deep-space probe. Following a brief description of the mission and RSE, the instrument and its wide capabilities will be reviewed. The focus will be in particular on the updated error budget, operational procedures and extended use of the instrument in the various parts of the RSE. It will be also described the procedure for on-ground calibration of the accelerometer.

  4. Free fall tests of the accelerometers of the MICROSCOPE mission

    NASA Astrophysics Data System (ADS)

    Liorzou, F.; Boulanger, D.; Rodrigues, M.; Touboul, P.; Selig, H.

    2014-09-01

    The MICROSCOPE mission is fully dedicated to the in-orbit test of the Universality of free fall, the so-called Weak Equivalence Principle (WEP), with an expected accuracy better than 10-15. The test principle consists in comparing the accelerations of two proof masses of different composition in the Earth gravitational field. The payload embarks two pairs of test-masses made of Platinum Rhodium and Titanium alloys at the core of two dedicated coaxial electrostatic accelerometers. These instruments are under qualification for a launch in 2016. Their operations are only possible in microgravity environment which makes its validation on ground a real issue. In Europe, only the drop tower of the ZARM Institute provides a facility for experiments under conditions of weightlessness and offers the experimental conditions to verify the correct functioning of the MICROSCOPE payload. The height of the tower limits the “free fall” experiment period to 4.72 s. Under this strong constraint, the demonstration of the capability to control the test masses of the two coaxial electrostatic accelerometers is challenging. This paper describes the complete experimental set up and in which condition the test has been performed, then an analysis of a drop result is given with its interpretations.

  5. Technique for Determining Bridge Displacement Response Using MEMS Accelerometers

    PubMed Central

    Sekiya, Hidehiko; Kimura, Kentaro; Miki, Chitoshi

    2016-01-01

    In bridge maintenance, particularly with regard to fatigue damage in steel bridges, it is important to determine the displacement response of the entire bridge under a live load as well as that of each member. Knowing the displacement response enables the identification of dynamic deformations that can cause stresses and ultimately lead to damage and thus also allows the undertaking of appropriate countermeasures. In theory, the displacement response can be calculated from the double integration of the measured acceleration. However, data measured by an accelerometer include measurement errors caused by the limitations of the analog-to-digital conversion process and sensor noise. These errors distort the double integration results. Furthermore, as bridges in service are constantly vibrating because of passing vehicles, estimating the boundary conditions for the numerical integration is difficult. To address these problems, this paper proposes a method for determining the displacement of a bridge in service from its acceleration based on its free vibration. To verify the effectiveness of the proposed method, field measurements were conducted using nine different accelerometers. Based on the results of these measurements, the proposed method was found to be highly accurate in comparison with the reference displacement obtained using a contact displacement gauge. PMID:26907287

  6. Surface Micromachined Silicon Carbide Accelerometers for Gas Turbine Applications

    NASA Technical Reports Server (NTRS)

    DeAnna, Russell G.

    1998-01-01

    A finite-element analysis of possible silicon carbide (SIC) folded-beam, lateral-resonating accelerometers is presented. Results include stiffness coefficients, acceleration sensitivities, resonant frequency versus temperature, and proof-mass displacements due to centripetal acceleration of a blade-mounted sensor. The surface micromachined devices, which are similar to the Analog Devices Inc., (Norwood, MA) air-bag crash detector, are etched from 2-pm thick, 3C-SiC films grown at 1600 K using atmospheric pressure chemical vapor deposition (APCVD). The substrate is a 500 gm-thick, (100) silicon wafer. Polysilicon or silicon dioxide is used as a sacrificial layer. The finite element analysis includes temperature-dependent properties, shape change due to volume expansion, and thermal stress caused by differential thermal expansion of the materials. The finite-element results are compared to experimental results for a SiC device of similar, but not identical, geometry. Along with changes in mechanical design, blade-mounted sensors would require on-chip circuitry to cancel displacements due to centripetal acceleration and improve sensitivity and bandwidth. These findings may result in better accelerometer designs for this application.

  7. Shock margin testing of a one-axis MEMS accelerometer.

    SciTech Connect

    Parson, Ted Blair; Tanner, Danelle Mary; Buchheit, Thomas Edward

    2008-07-01

    Shock testing was performed on a selected commercial-off-the-shelf - MicroElectroMechanical System (COTS-MEMS) accelerometer to determine the margin between the published absolute maximum rating for shock and the 'measured' level where failures are observed. The purpose of this testing is to provide baseline data for isolating failure mechanisms under shock and environmental loading in a representative device used or under consideration for use within systems and assemblies of the DOD/DOE weapons complex. The specific device chosen for this study was the AD22280 model of the ADXL78 MEMS Accelerometer manufactured by Analog Devices Inc. This study focuses only on the shock loading response of the device and provides the necessary data for adding influence of environmental exposure to the reliability of this class of devices. The published absolute maximum rating for acceleration in any axis was 4000 G for this device powered or unpowered. Results from this study showed first failures at 8000 G indicating a margin of error of two. Higher shock level testing indicated that an in-plane, but off-axis acceleration was more damaging than one in the sense direction.

  8. Airbag accelerometer with a simple switched-capacitor readout ASIC

    NASA Astrophysics Data System (ADS)

    Tsugai, Masahiro; Hirata, Yoshiaki; Tanimoto, Koji; Usami, Teruo; Araki, Toru; Otani, Hiroshi

    1997-09-01

    A bulk micromachined capacitive accelerometer for airbag applications based on (110) silicon anisotropic KOH etching is presented. The sensor is a two-chip accelerometer that consists of a glass-silicon-glass stacked sense element and an interface ASIC containing an impedance converter for capacitance detection, an EPROM and DACs for digital trimming, and a self-test feature for diagnosis. A simple switched-capacitor readout circuit with DC offset error cancellation scheme is proposed as the impedance converter. The dependence of narrow gap etching, surface roughness, and uniformity of the groove depth on the KOH concentration are also investigated for the fabrication of the device, and it is shown that the etch rate of the plane intrinsically controls the depth of the narrow gap with a KOH concentration of over 30 wt. percent, and smooth surface and uniformity of groove depth are obtained at 40 wt. percent KOH. The nonlinearity of the output is about 1.5 percent FS. The temperature coefficient of sensitivity and the off-axis sensitivity are 150 ppm/degree C and 2 percent respectively. The dimensions of the sensor are 10.3 X 10.3 X 3 mm.

  9. Engineering Implications of Rotational Sensitivity of Translational Accelerometers

    NASA Astrophysics Data System (ADS)

    Boroschek, R. L.

    2006-12-01

    Several studies have indicated that nominal linear translational accelerometers are strongly sensitive to rotation motions, especially around their horizontal axis. It has been theoretically and experimentally demonstrated that this situation affects the acceleration record and severely limits appropriate velocity and displacement determination. More importantly the common believe that filtering long periods signals could "clean" the acceleration record from this unwanted effect has been shown inadequate by the author this abstract and collaborators using experimental testing. Rotational effects are still present on filtered records unless the complete frequency bandwidth that composes the rotation motion is filtered out. In civil engineering structures rotations are nearly always present. Typical examples are foundation rocking, beam bending, floor slab deformation and overall rotation of structures due to relative large loads or damage. Two real cases were rotation of a relative flexible structure strongly influence the linear accelerometer responses are presented and later experimentally reproduce in a shake table controlled situation. The first one corresponds to a bridge with a contiguous 383 meter simple supported beam rested on rubber bearing that suffered the rotational related distortions due to the passing of a heavy truck at the end of a seismic event. The second event corresponds to the vibration recording of vertical motions on an industrial bridge that is exposed to forced vibration of a large motor. Both examples indicate that in certain conditions motion records from structural instruments are subjected to distortions effects that could make acceleration, velocity and displacement (temporarily or permanent) measurements not reliable.

  10. Applying macro design tools to the design of MEMS accelerometers

    SciTech Connect

    Davies, B.R.; Rodgers, M.S.; Montague, S.

    1998-02-01

    This paper describes the design of two different surface micromachined (MEMS) accelerometers and the use of design and analysis tools intended for macro sized devices. This work leverages a process for integrating both the micromechanical structures and microelectronics circuitry of a MEMS accelerometer on the same chip. In this process, the mechanical components of the sensor are first fabricated at the bottom of a trench etched into the wafer substrate. The trench is then filled with oxide and sealed to protect the mechanical components during subsequent microelectronics processing. The wafer surface is then planarized in preparation for CMOS processing. Next, the CMOS electronics are fabricated and the mechanical structures are released. The mechanical structure of each sensor consists of two polysilicon plate masses suspended by multiple springs (cantilevered beam structures) over corresponding polysilicon plates fixed to the substrate to form two parallel plate capacitors. One polysilicon plate mass is suspended using compliant springs forming a variable capacitor. The other polysilicon plate mass is suspended using very stiff springs acting as a fixed capacitor. Acceleration is measured by comparing the variable capacitance with the fixed capacitance during acceleration.

  11. Conservation of Drawings and Prints

    ERIC Educational Resources Information Center

    King, Antoinette

    1972-01-01

    Some of the basic techniques of preserving and restoring prints and drawings are outlined. Examination, dry cleaning, stain removal, mending, backing removal, and lining are discussed, as well as aspects of the complexity of bleaching, types and nature of some stains and discolorations, and materials of poor quality used by many framers. (Author)

  12. Metric Supplement to Technical Drawing.

    ERIC Educational Resources Information Center

    Henschel, Mark

    This manual is intended for use in training persons whose vocations involve technical drawing to use the metric system of measurement. It could be used in a short course designed for that purpose or for individual study. The manual begins with a brief discussion of the rationale for conversion to the metric system. It then provides a…

  13. Analysing Children's Drawings: Applied Imagination

    ERIC Educational Resources Information Center

    Bland, Derek

    2012-01-01

    This article centres on a research project in which freehand drawings provided a richly creative and colourful data source of children's imagined, ideal learning environments. Issues concerning the analysis of the visual data are discussed, in particular, how imaginative content was analysed and how the analytical process was dependent on an…

  14. Calibration and validation of individual GOCE accelerometers by precise orbit determination

    NASA Astrophysics Data System (ADS)

    Visser, P. N. A. M.; IJssel, J. A. A. van den

    2016-01-01

    The European Space Agency Gravity field and steady-state Ocean Circular Explorer (GOCE) carries a gradiometer consisting of three pairs of accelerometers in an orthogonal triad. Precise GOCE science orbit solutions (PSO), which are based on satellite-to-satellite tracking observations by the Global Positioning System and which are claimed to be at the few cm precision level, can be used to calibrate and validate the observations taken by the accelerometers. This has been done for each individual accelerometer by a dynamic orbit fit of the time series of position co-ordinates from the PSOs, where the accelerometer observations represent the non-gravitational accelerations. Since the accelerometers do not coincide with the center of mass of the GOCE satellite, the observations have to be corrected for rotational and gravity gradient terms. This is not required when using the so-called common-mode accelerometer observations, provided the center of the gradiometer coincides with the GOCE center of mass. Dynamic orbit fits based on these common-mode accelerations therefore served as reference. It is shown that for all individual accelerometers, similar dynamic orbit fits can be obtained provided the above-mentioned corrections are made. In addition, accelerometer bias estimates are obtained that are consistent with offsets in the gravity gradients that are derived from the GOCE gradiometer observations.

  15. Assessing Physical Activity in Children with Asthma: Convergent Validity between Accelerometer and Electronic Diary Data

    ERIC Educational Resources Information Center

    Floro, Josh N.; Dunton, Genevieve F.; Delfino, Ralph J.

    2009-01-01

    Convergent validity of accelerometer and electronic diary physical activity data was assessed in children with asthma. Sixty-two participants, ages 9-18 years, wore an accelerometer and reported their physical activity level in quarter-hour segments every 2 hr using the Ambulatory Diary Assessment (ADA). Moderate validity was found between…

  16. A New Z-axis Resonant Micro-Accelerometer Based on Electrostatic Stiffness

    PubMed Central

    Yang, Bo; Wang, Xingjun; Dai, Bo; Liu, Xiaojun

    2015-01-01

    Presented in the paper is the design, the simulation, the fabrication and the experiment of a new z-axis resonant accelerometer based on the electrostatic stiffness. The new z-axis resonant micro-accelerometer, which consists of a torsional accelerometer and two plane resonators, decouples the sensing movement of the accelerometer from the oscillation of the plane resonators by electrostatic stiffness, which will improve the performance. The new structure and the sensitive theory of the acceleration are illuminated, and the equation of the scale factor is deduced under ideal conditions firstly. The Ansys simulation is implemented to verify the basic principle of the torsional accelerometer and the plane resonator individually. The structure simulation results prove that the effective frequency of the torsional accelerometer and the plane resonator are 0.66 kHz and 13.3 kHz, respectively. Then, the new structure is fabricated by the standard three-mask deep dry silicon on glass (DDSOG) process and encapsulated by parallel seam welding. Finally, the detecting and control circuits are designed to achieve the closed-loop self-oscillation, to trace the natural frequency of resonator and to measure the system frequency. Experimental results show that the new z-axis resonant accelerometer has a scale factor of 31.65 Hz/g, a bias stability of 727 μg and a dynamic range of over 10 g, which proves that the new z-axis resonant micro-accelerometer is practicable. PMID:25569748

  17. Young Children's Drawings in Problem Solving

    ERIC Educational Resources Information Center

    Bakar, Kamariah Abu; Way, Jennifer; Bobis, Janette

    2016-01-01

    This paper explores young children's drawings (6 years old) in early number and addition activities in Malaysia. Observation, informal interviews and analysis of drawings revealed two types of drawing, and gave insight into the transitional process required for children to utilise drawings in problem solving. We argue the importance of valuing and…

  18. Drawing: The Social Construction of Knowledge

    ERIC Educational Resources Information Center

    Brooks, Margaret

    2004-01-01

    Despite a growing interest in children's drawing, there are few meaningful frameworks for examining what it is that children are doing when they draw. In this paper particular aspects of Vygotsky's sociocultural theories are re-examined in relation to young children's drawing processes. Using one kindergarten child's drawings of the growth and…

  19. Try This: Draw Like a Scientist

    ERIC Educational Resources Information Center

    Preston, Christine

    2016-01-01

    Young children love to draw, and should be encouraged to explore drawing as a communication tool. Drawing is a means by which children can express their thoughts, interests and feelings, long before they learn to write. We know that: "children's drawings are vehicles for expression and communication" (Chang, 2012, p. 187). This form of…

  20. DRAW: Molecule Drawing Program Version 2.00

    DTIC Science & Technology

    1989-07-01

    MP199 PLOT SETLAB DORTEP HELP MV PLOTS SETTRM DRAW HQRII NAAPSE PLTXY SETVEC DRELIM INFO NAARC PRIME SIMBOL EDIT DRCRD NACICI PROJ SPARE EDITAD LA50...MM MOVES MV MYORTEP MYPRELIM NORM NUMBUR PiXES PLOTS PLTXY PRIME PROJ RADIAL - 68 - SUBROUTINES Page B-3 RDBYTE SCRIBE SEARC SIMBOL SPARE STOR TABLE...LAP500 DORTEP DRELIM SEAKC SIMBOL GIPRD LCLEAN WRITE VTLINE - 70- SUBROUT INES Page B-5 COMMON: DENSTY DISPLY COMMON: DEVICE DRAWII NAPRIN COMMON: DISPLY

  1. High shock, high frequency characteristics of a mechanical isolator for a piezoresistive accelerometer

    SciTech Connect

    Bateman, V.I.; Brown, F.A.; Davie, N.T.

    1995-07-01

    A mechanical isolator has been developed for a piezoresistive accelerometer. The purpose of the isolator is to mitigate high frequency shocks before they reach the accelerometer because the high frequency shocks may cause the accelerometer to resonate. Since the accelerometer is undamped, it often breaks when it resonates. The mechanical isolator was developed in response to impact test requirements for a variety of structures at Sandia National Laboratories. An Extended Technical Assistance Program with the accelerometer manufacturer has resulted in a commercial isolator that will be available to the general public. This mechanical isolator has ten times the bandwidth of any other commercial isolator and has acceptable frequency domain performance from DC to 10 kHz ({plus_minus} 10%) over a temperature range of -65{degrees}F to +185{degrees}F as demonstrated in this paper.

  2. Atmospheric structure from Mars Reconnaissance Orbiter accelerometer measurements

    NASA Astrophysics Data System (ADS)

    Keating, G.; Bougher, S.; Theriot, M.; Zurek, R.; Blanchard, R.; Tolson, R.; Murphy, J.

    Designed for aerobraking, Mars Reconnaissance Orbiter (MRO) launched on August 12, 2005, achieved Mars Orbital Insertion (MOI), March 10, 2006. Atmospheric density decreases exponentially with increasing height. By small propulsive adjustments of the apoapsis orbital velocity, periapsis altitude is fine tuned to the density surface that will safely use the atmosphere of Mars to aerobrake over 500 orbits. MRO periapsis precesses from the South Pole at 6pm LST to near the equator at 3am LST. Meanwhile, apoapsis is brought dramatically from ˜40,000km at MOI to 460 km at aerobraking completion (ABX) mid September 2006. After ABX, a few small propulsive maneuvers will establish the Primary Science Orbit (PSO), which without aerobraking would have required an additional 400 kg of fuel. Each of the 500 plus aerobraking orbits provides a vertical structure and distribution of density, scale heights, and temperatures, along the orbital path, providing key in situ insight into various upper atmosphere (> 100 km) processes. One of the major questions for scientists studying Mars is: "Where did the water go?" Honeywell's substantially improved electronics package for its IMU (QA-2000 accelerometer, gyro, electronics) maximized accelerometer sensitivities at the requests of The George Washington University, JPL, and Lockheed Martin. The improved accelerometer sensitivities allowed density measurements to exceed 200km, at least 40 km higher than with Mars Odyssey (MO). This extends vertical structures from MRO into the neutral lower exosphere, a region where various processes may allow atmospheric gasses to escape. Over the eons, water may have been lost in both the lower atmosphere and the upper atmosphere, thus the water balance throughout the entire atmosphere from subsurface to exosphere may be equally critical. Comparisons of data from Mars Global Surveyor (MGS), MO and MRO will help characterize key temporal and spatial cycles including: polar vortices, winter polar

  3. Slice&Dice: Recognizing Food Preparation Activities Using Embedded Accelerometers

    NASA Astrophysics Data System (ADS)

    Pham, Cuong; Olivier, Patrick

    Within the context of an endeavor to provide situated support for people with cognitive impairments in the kitchen, we developed and evaluated classifiers for recognizing 11 actions involved in food preparation. Data was collected from 20 lay subjects using four specially designed kitchen utensils incorporating embedded 3-axis accelerometers. Subjects were asked to prepare a mixed salad in our laboratory-based instrumented kitchen environment. Video of each subject's food preparation activities were independently annotated by three different coders. Several classifiers were trained and tested using these features. With an overall accuracy of 82.9% our investigation demonstrated that a broad set of food preparation actions can be reliably recognized using sensors embedded in kitchen utensils.

  4. Accelerometer-Based Event Detector for Low-Power Applications

    PubMed Central

    Smidla, József; Simon, Gyula

    2013-01-01

    In this paper, an adaptive, autocovariance-based event detection algorithm is proposed, which can be used with micro-electro-mechanical systems (MEMS) accelerometer sensors to build inexpensive and power efficient event detectors. The algorithm works well with low signal-to-noise ratio input signals, and its computational complexity is very low, allowing its utilization on inexpensive low-end embedded sensor devices. The proposed algorithm decreases its energy consumption by lowering its duty cycle, as much as the event to be detected allows it. The performance of the algorithm is tested and compared to the conventional filter-based approach. The comparison was performed in an application where illegal entering of vehicles into restricted areas was detected. PMID:24135991

  5. A silicon micromachined piezoresistive accelerometer for health and condition monitoring

    NASA Technical Reports Server (NTRS)

    Walsh, Kevin M.; Henderson, H. Thurman

    1990-01-01

    Silicon micromachining etching techniques were utilized to batch-fabricate hundreds of general purpose microaccelerometers on a single silicon substrate. Piezoresistive sensing elements were aligned to the back-side patterns using an IR mask aligner and then diffused into the areas of maximum stress. Capping of the two-arm cantilever beam structure was achieved using a combination of electrostatic bonding and low temperature glass films. Overrange protection, critical damping, and overall protection from the outside environment are achieved by controlling the cavity depths of the top and bottom covers. Temperature compensation, amplification, and filtering are performed by a companion LSI chip that is interfaced to the accelerometer by conventional wire-bonding techniques.

  6. Vehicle Maneuver Detection with Accelerometer-Based Classification

    PubMed Central

    Cervantes-Villanueva, Javier; Carrillo-Zapata, Daniel; Terroso-Saenz, Fernando; Valdes-Vela, Mercedes; Skarmeta, Antonio F.

    2016-01-01

    In the mobile computing era, smartphones have become instrumental tools to develop innovative mobile context-aware systems. In that sense, their usage in the vehicular domain eases the development of novel and personal transportation solutions. In this frame, the present work introduces an innovative mechanism to perceive the current kinematic state of a vehicle on the basis of the accelerometer data from a smartphone mounted in the vehicle. Unlike previous proposals, the introduced architecture targets the computational limitations of such devices to carry out the detection process following an incremental approach. For its realization, we have evaluated different classification algorithms to act as agents within the architecture. Finally, our approach has been tested with a real-world dataset collected by means of the ad hoc mobile application developed. PMID:27690058

  7. GOCE Accelerometers Data Revisited: Stability And Detector Noise

    NASA Astrophysics Data System (ADS)

    Berge, J.; Christophe, B.; Foulon, B.

    2013-12-01

    We report on our analyses of Gravity field and steady- state Ocean Circulation Explorer (GOCE) data aiming to characterize the stability and the noise of GOCE's ac- celerometers. We first measure science and detector co- herence signals, which allow us to infer the role of the accelerometers Digital Voltage Amplifiers and measure- ment chanel in the overall quadratic factor and scale fac- tor; we show that their temporal stability is as low as ex- pected. We then investigate the effect of the aliasing of high frequency detector's noise on the measured noise, in an attempt to explain why the measured noise is higher than originally expected. We find that although this alias- ing explains part of the higher noise, it does not account for the total of the difference seen between the expected and the measured noise.

  8. Concept of an Opto-electronic Accelerometer System (OAS)

    NASA Technical Reports Server (NTRS)

    Kunkel, B.; Keller, K.; Lutz, R.

    1987-01-01

    An accelerometer based on a spring-suspended reference mass and its precise relative motion measurement by means of 3 two-dimensional position sensitive detectors (PSD) is described. A breadboard model achieves a resolution (longterm linearity) of 25 nm in one direction. Due to the physical principle of the PSD, the second layer is slightly less sensitive than the top layer; accordingly for gravity gradient detection the more sensitive layer is selected for the Z/X component detection. At 10 Hz sampling rate an acceleration gradient of under 10 to the minus 12th power g (i.e., 0.01 E or 0.001 Gal/km) is considered to be detectable.

  9. Concept of an Opto-electronic Accelerometer System (OAS)

    NASA Astrophysics Data System (ADS)

    Kunkel, B.; Keller, K.; Lutz, R.

    1987-10-01

    An accelerometer based on a spring-suspended reference mass and its precise relative motion measurement by means of 3 two-dimensional position sensitive detectors (PSD) is described. A breadboard model achieves a resolution (longterm linearity) of 25 nm in one direction. Due to the physical principle of the PSD, the second layer is slightly less sensitive than the top layer; accordingly for gravity gradient detection the more sensitive layer is selected for the Z/X component detection. At 10 Hz sampling rate an acceleration gradient of under 10 to the minus 12th power g (i.e., 0.01 E or 0.001 Gal/km) is considered to be detectable.

  10. Monolithic CMOS-MEMS integration for high-g accelerometers

    NASA Astrophysics Data System (ADS)

    Narasimhan, Vinayak; Li, Holden; Tan, Chuan Seng

    2014-10-01

    This paper highlights work-in-progress towards the conceptualization, simulation, fabrication and initial testing of a silicon-germanium (SiGe) integrated CMOS-MEMS high-g accelerometer for military, munition, fuze and shock measurement applications. Developed on IMEC's SiGe MEMS platform, the MEMS offers a dynamic range of 5,000 g and a bandwidth of 12 kHz. The low noise readout circuit adopts a chopper-stabilization technique implementing the CMOS through the TSMC 0.18 µm process. The device structure employs a fully differential split comb-drive set up with two sets of stators and a rotor all driven separately. Dummy structures acting as protective over-range stops were designed to protect the active components when under impacts well above the designed dynamic range.

  11. ISLES: Probing Extra Dimensions Using a Superconducting Accelerometer

    NASA Technical Reports Server (NTRS)

    Paik, Ho Jung; Moody, M. Vol; Prieto-Gortcheva, Violeta A.

    2003-01-01

    In string theories, extra dimensions must be compactified. The possibility that gravity can have large radii of compactification leads to a violation of the inverse square law at submillimeter distances. The objective of ISLES is to perform a null test of Newton s law in space with a resolution of one part in 10(exp 5) or better at 100 microns. The experiment will be cooled to less than or equal to 2 K, which permits superconducting magnetic levitation of the test masses. To minimize Newtonian errors, ISLES employs a near null source, a circular disk of large diameter-to-thickness ratio. Two test masses, also disk-shaped, are suspended on the two sides of the source mass at a nominal distance of 100 microns. The signal is detected by a superconducting differential accelerometer. A ground test apparatus is under construction.

  12. Accelerometer Use in a Physical Activity Intervention Trial

    PubMed Central

    Borradaile, Kelley E.; Lewis, Beth A.; Whiteley, Jessica A.; Longval, Jaime L.; Parisi, Alfred F.; Albrecht, Anna E.; Sciamanna, Christopher N.; Jakicic, John M.; Papandonatos, George D.; Marcus, Bess H.

    2010-01-01

    This paper describes the application of best practice recommendations for using accelerometers in a physical activity (PA) intervention trial, and the concordance of different methods for measuring PA. A subsample (n=63; 26%) of the 239 healthy, sedentary adults participating in a PA trial (mean age=47.5; 82% women) wore the ActiGraph monitor at all 3 assessment time points. ActiGraph data were compared with self-report (i.e., PA weekly recall and monthly log) and fitness variables. Correlations between the PA recall and ActiGraph for moderate intensity activity ranged from 0.16–0.48 and from 0.28–0.42 for vigorous intensity activity. ActiGraph and fitness [estimated VO2(ml/kg/min)] had correlations of 0.15–0.45. The ActiGraph and weekly self-report were significantly correlated at all time points (correlations ranged from 0.23–0.44). In terms of detecting intervention effects, intervention groups recorded more minutes of at least moderate-intensity PA on the ActiGraph than the control group at 6 months (min=46.47, 95% CI=14.36–78.58), but not at 12 months. Limitations of the study include a small sample size and only 3 days of ActiGraph monitoring. To obtain optimal results with accelerometers in clinical trials, the authors recommend following best practice recommendations: detailed protocols for monitor use, calibration of monitors and validation of data quality, and use of validated equations for analysis. The ActiGraph has modest concordance with other assessment tools and is sensitive to change over time. However, until more information validating the use of accelerometry in clinical trials becomes available, properly administered self-report measures of PA should remain part of the assessment battery. PMID:20723619

  13. Accelerometer use in a physical activity intervention trial.

    PubMed

    Napolitano, Melissa A; Borradaile, Kelley E; Lewis, Beth A; Whiteley, Jessica A; Longval, Jaime L; Parisi, Alfred F; Albrecht, Anna E; Sciamanna, Christopher N; Jakicic, John M; Papandonatos, George D; Marcus, Bess H

    2010-11-01

    This paper describes the application of best practice recommendations for using accelerometers in a physical activity (PA) intervention trial, and the concordance of different methods for measuring PA. A subsample (n = 63; 26%) of the 239 healthy, sedentary adults participating in a PA trial (mean age = 47.5; 82% women) wore the ActiGraph monitor at all 3 assessment time points. ActiGraph data were compared with self-report (i.e., PA weekly recall and monthly log) and fitness variables. Correlations between the PA recall and ActiGraph for moderate intensity activity ranged from 0.16-0.48 and from 0.28-0.42 for vigorous intensity activity. ActiGraph and fitness [estimated VO(2)(ml/kg/min)] had correlations of 0.15-0.45. The ActiGraph and weekly self-report were significantly correlated at all time points (correlations ranged from 0.23 to 0.44). In terms of detecting intervention effects, intervention groups recorded more minutes of at least moderate-intensity PA on the ActiGraph than the control group at 6 months (min = 46.47, 95% CI = 14.36-78.58), but not at 12 months. Limitations of the study include a small sample size and only 3 days of ActiGraph monitoring. To obtain optimal results with accelerometers in clinical trials, the authors recommend following best practice recommendations: detailed protocols for monitor use, calibration of monitors and validation of data quality, and use of validated equations for analysis. The ActiGraph has modest concordance with other assessment tools and is sensitive to change over time. However, until more information validating the use of accelerometry in clinical trials becomes available, properly administered self-report measures of PA should remain part of the assessment battery.

  14. 48 CFR 536.570-9 - Shop drawings, coordination drawings, and schedules.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... 48 Federal Acquisition Regulations System 4 2010-10-01 2010-10-01 false Shop drawings... CONTRACTS Contract Clauses 536.570-9 Shop drawings, coordination drawings, and schedules. Insert the clause at 552.236-78, Shop Drawings, Coordination Drawings, and Schedules, in solicitations and contracts...

  15. Quasi-Static Calibration Method of a High-g Accelerometer.

    PubMed

    Wang, Yan; Fan, Jinbiao; Zu, Jing; Xu, Peng

    2017-02-20

    To solve the problem of resonance during quasi-static calibration of high-g accelerometers, we deduce the relationship between the minimum excitation pulse width and the resonant frequency of the calibrated accelerometer according to the second-order mathematical model of the accelerometer, and improve the quasi-static calibration theory. We establish a quasi-static calibration testing system, which uses a gas gun to generate high-g acceleration signals, and apply a laser interferometer to reproduce the impact acceleration. These signals are used to drive the calibrated accelerometer. By comparing the excitation acceleration signal and the output responses of the calibrated accelerometer to the excitation signals, the impact sensitivity of the calibrated accelerometer is obtained. As indicated by the calibration test results, this calibration system produces excitation acceleration signals with a pulse width of less than 1000 μs, and realize the quasi-static calibration of high-g accelerometers with a resonant frequency above 20 kHz when the calibration error was 3%.

  16. A brief test of the Hewlett-Packard MEMS seismic accelerometer

    USGS Publications Warehouse

    Homeijer, Brian D.; Milligan, Donald J.; Hutt, Charles R.

    2014-01-01

    Testing was performed on a prototype of Hewlett-Packard (HP) Micro-Electro-Mechanical Systems (MEMS) seismic accelerometer at the U.S. Geological Survey’s Albuquerque Seismological Laboratory. This prototype was built using discrete electronic components. The self-noise level was measured during low seismic background conditions and found to be 9.8 ng/√Hz at periods below 0.2 s (frequencies above 5 Hz). The six-second microseism noise was also discernible. The HP MEMS accelerometer was compared to a Geotech Model GS-13 reference seismometer during seismic noise and signal levels well above the self-noise of the accelerometer. Matching power spectral densities (corrected for accelerometer and seismometer responses to represent true ground motion) indicated that the HP MEMS accelerometer has a flat (constant) response to acceleration from 0.0125 Hz to at least 62.5 Hz. Tilt calibrations of the HP MEMS accelerometer verified that the flat response to acceleration extends to 0 Hz. Future development of the HP MEMS accelerometer includes replacing the discreet electronic boards with a low power application-specific integrated circuit (ASIC) and increasing the dynamic range of the sensor to detect strong motion signals above one gravitational acceleration, while maintaining the self-noise observed during these tests.

  17. A triaxial accelerometer monkey algorithm for optimal sensor placement in structural health monitoring

    NASA Astrophysics Data System (ADS)

    Jia, Jingqing; Feng, Shuo; Liu, Wei

    2015-06-01

    Optimal sensor placement (OSP) technique is a vital part of the field of structural health monitoring (SHM). Triaxial accelerometers have been widely used in the SHM of large-scale structures in recent years. Triaxial accelerometers must be placed in such a way that all of the important dynamic information is obtained. At the same time, the sensor configuration must be optimal, so that the test resources are conserved. The recommended practice is to select proper degrees of freedom (DOF) based upon several criteria and the triaxial accelerometers are placed at the nodes corresponding to these DOFs. This results in non-optimal placement of many accelerometers. A ‘triaxial accelerometer monkey algorithm’ (TAMA) is presented in this paper to solve OSP problems of triaxial accelerometers. The EFI3 measurement theory is modified and involved in the objective function to make it more adaptable in the OSP technique of triaxial accelerometers. A method of calculating the threshold value based on probability theory is proposed to improve the healthy rate of monkeys in a troop generation process. Meanwhile, the processes of harmony ladder climb and scanning watch jump are proposed and given in detail. Finally, Xinghai NO.1 Bridge in Dalian is implemented to demonstrate the effectiveness of TAMA. The final results obtained by TAMA are compared with those of the original monkey algorithm and EFI3 measurement, which show that TAMA can improve computational efficiency and get a better sensor configuration.

  18. Quasi-Static Calibration Method of a High-g Accelerometer

    PubMed Central

    Wang, Yan; Fan, Jinbiao; Zu, Jing; Xu, Peng

    2017-01-01

    To solve the problem of resonance during quasi-static calibration of high-g accelerometers, we deduce the relationship between the minimum excitation pulse width and the resonant frequency of the calibrated accelerometer according to the second-order mathematical model of the accelerometer, and improve the quasi-static calibration theory. We establish a quasi-static calibration testing system, which uses a gas gun to generate high-g acceleration signals, and apply a laser interferometer to reproduce the impact acceleration. These signals are used to drive the calibrated accelerometer. By comparing the excitation acceleration signal and the output responses of the calibrated accelerometer to the excitation signals, the impact sensitivity of the calibrated accelerometer is obtained. As indicated by the calibration test results, this calibration system produces excitation acceleration signals with a pulse width of less than 1000 μs, and realize the quasi-static calibration of high-g accelerometers with a resonant frequency above 20 kHz when the calibration error was 3%. PMID:28230743

  19. Agreement rates for sleep/wake judgments obtained via accelerometer and sleep diary: a comparison.

    PubMed

    Kawada, Tomoyuki

    2008-11-01

    Agreement rates for waking and sleeping obtained via sleep diary and accelerometer were evaluated, to compare the two methods. Sleep/wake data for consecutive days and nights were surveyed in 119 healthy university students. Accelerometer sleep/wake judgments obeyed the standard algorithm. Agreement rates for waking and sleeping according to accelerometer versus sleep diary, respectively, were calculated. Sleep diary data were set as a baseline. Seventy-six subjects (63.9%), 22 to 32 years of age, presented perfect data for the analysis. The mean sleep times, in minutes, judged by sleep diary and by accelerometer, were 482.3 and 629.6, respectively. The mean percentages and standard deviations of agreement on wake and sleep were 77.5% (SD = 10.2) and 86.1% (SD = 6.2), respectively. There was a significant negative relationship between the agreement rates for wake and sleep (r = -.482, p < .01). The accelerometer showed some measurement failure during waking, presumably because of the decrease in body movement. Sleep diary data during daytime appear to be more valid for detecting a sleep/wake cycle than are accelerometer data. In contrast, nocturnal sleep diary data might be supplemented by the use of an accelerometer as long as participants do not have insomnia.

  20. Self Diagnostic Accelerometer for Mission Critical Health Monitoring of Aircraft and Spacecraft Engines

    NASA Technical Reports Server (NTRS)

    Lekki, John; Tokars, Roger; Jaros, Dave; Riggs, M. Terrence; Evans, Kenneth P.; Gyekenyesi, Andrew

    2009-01-01

    A self diagnostic accelerometer system has been shown to be sensitive to multiple failure modes of charge mode accelerometers. These failures include sensor structural damage, an electrical open circuit and most importantly sensor detachment. In this paper, experimental work that was performed to determine the capabilities of a self diagnostic accelerometer system while operating in the presence of various levels of mechanical noise, emulating real world conditions, is presented. The results show that the system can successfully conduct a self diagnostic routine under these conditions.

  1. Use of a laser doppler vibrometer for high frequency accelerometer characterizations

    SciTech Connect

    Bateman, V.I.; Hansche, B.D.; Solomon, O.M.

    1995-12-31

    A laser doppler vibrometer (LDV) is being used for high frequency characterizations of accelerometers at Sandia National Laboratories (SNL). A LDV with high frequency (up to 1.5 MHz) and high velocity (10 M/s) capability was purchased from a commercial source and has been certified by the Primary Electrical Standards Department at SNL. The method used for this certification and the certification results are presented. Use of the LDV for characterization of accelerometers at high frequencies and of accelerometer sensitivity to cross-axis shocks on a Hopkinson bar apparatus is discussed.

  2. 37 CFR 1.437 - The drawings.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... 37 Patents, Trademarks, and Copyrights 1 2010-07-01 2010-07-01 false The drawings. 1.437 Section 1... COMMERCE GENERAL RULES OF PRACTICE IN PATENT CASES International Processing Provisions The International Application § 1.437 The drawings. (a) Drawings are required when they are necessary for the understanding...

  3. 37 CFR 1.165 - Plant drawings.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... 37 Patents, Trademarks, and Copyrights 1 2010-07-01 2010-07-01 false Plant drawings. 1.165 Section... COMMERCE GENERAL RULES OF PRACTICE IN PATENT CASES National Processing Provisions Plant Patents § 1.165 Plant drawings. (a) Plant patent drawings should be artistically and competently executed and...

  4. 37 CFR 1.165 - Plant drawings.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ... 37 Patents, Trademarks, and Copyrights 1 2011-07-01 2011-07-01 false Plant drawings. 1.165 Section... COMMERCE GENERAL RULES OF PRACTICE IN PATENT CASES National Processing Provisions Plant Patents § 1.165 Plant drawings. (a) Plant patent drawings should be artistically and competently executed and...

  5. Methods and Strategies: Using Drawing Strategically

    ERIC Educational Resources Information Center

    Glynn, Shawn; Muth, K. Denise

    2008-01-01

    Drawing activities in science can help students conceptualize and reflect on their experiences. In this article, the authors share their experiences incorporating drawing into science lessons for third- and fourth-grade students. While these examples pertain to life science lessons, drawing strategically is appropriate for any topic and is an…

  6. Black Children Draw Their Families: Some Surprises.

    ERIC Educational Resources Information Center

    Habenicht, Donna J.; And Others

    Analysis of the Kinetic Family Drawings (KFD) of black children offers counselors insight into children's perceptions of the black family that do not support traditional views. The KFD is a drawing of the child's family, including the counselee, doing something together. The child then explains the drawing and identifies each of the family…

  7. Expanding Music Listening Experience through Drawing

    ERIC Educational Resources Information Center

    Han, Yo-Jung

    2016-01-01

    Drawing while listening to music provides an opportunity for students to imagine and associate, leading to holistic listening experience. The personal qualitative listening experience triggered by music can be revealed in their drawings. In the process of representing of the listening experience through drawing, students can also increase their…

  8. 37 CFR 1.165 - Plant drawings.

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ... 37 Patents, Trademarks, and Copyrights 1 2014-07-01 2014-07-01 false Plant drawings. 1.165 Section... COMMERCE GENERAL RULES OF PRACTICE IN PATENT CASES National Processing Provisions Plant Patents § 1.165 Plant drawings. (a) Plant patent drawings should be artistically and competently executed and...

  9. 37 CFR 1.165 - Plant drawings.

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ... 37 Patents, Trademarks, and Copyrights 1 2013-07-01 2013-07-01 false Plant drawings. 1.165 Section... COMMERCE GENERAL RULES OF PRACTICE IN PATENT CASES National Processing Provisions Plant Patents § 1.165 Plant drawings. (a) Plant patent drawings should be artistically and competently executed and...

  10. 37 CFR 1.165 - Plant drawings.

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ... 37 Patents, Trademarks, and Copyrights 1 2012-07-01 2012-07-01 false Plant drawings. 1.165 Section... COMMERCE GENERAL RULES OF PRACTICE IN PATENT CASES National Processing Provisions Plant Patents § 1.165 Plant drawings. (a) Plant patent drawings should be artistically and competently executed and...

  11. Drawing and Painting with Under-Threes.

    ERIC Educational Resources Information Center

    Kolbe, Ursula; Smyth, Jane

    2000-01-01

    Noting that drawing and painting offer very young children powerful ways to explore and communicate thoughts and feelings, this booklet for caregivers and teachers offers suggestions related to painting and drawing for children under 3 years. The booklet discusses what young children can do with drawing and painting materials, including exploring…

  12. 37 CFR 1.152 - Design drawings.

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ... 37 Patents, Trademarks, and Copyrights 1 2012-07-01 2012-07-01 false Design drawings. 1.152... COMMERCE GENERAL RULES OF PRACTICE IN PATENT CASES National Processing Provisions Design Patents § 1.152 Design drawings. The design must be represented by a drawing that complies with the requirements of §...

  13. 37 CFR 1.152 - Design drawings.

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ... 37 Patents, Trademarks, and Copyrights 1 2014-07-01 2014-07-01 false Design drawings. 1.152... COMMERCE GENERAL RULES OF PRACTICE IN PATENT CASES National Processing Provisions Design Patents § 1.152 Design drawings. The design must be represented by a drawing that complies with the requirements of §...

  14. 37 CFR 1.152 - Design drawings.

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ... 37 Patents, Trademarks, and Copyrights 1 2013-07-01 2013-07-01 false Design drawings. 1.152... COMMERCE GENERAL RULES OF PRACTICE IN PATENT CASES National Processing Provisions Design Patents § 1.152 Design drawings. The design must be represented by a drawing that complies with the requirements of §...

  15. Characteristics of a piezoresistive accelerometer in shock environments up to 150,000 G

    SciTech Connect

    Bateman, V.I.; Davie, N.T.; Brown, F.A.

    1995-03-01

    The characteristics of a piezoresistive accelerometer in shock environments are being studied at Sandia National Laboratories in the Mechanical Shock Testing Laboratory. A Hopkinson bar capability has been developed to extend our undemanding of the piezoresistive accelerometer, in two mechanical configurations, in the high frequency, high shock environments where measurements are being made. Two different Hopkinson bar materials are being used: Titanium and beryllium The in-axis performance of the piezoresistive accelerometer for frequencies of dc-10 kHz and shock magnitudes of up to 150,000 g as determined from measurements with a titanium Hopkinson bar are presented. The beryllium Hopkinson bar configuration is described. Preliminary in-axis characteristics of the piezoresistive accelerometer at a nominal shock level of 50,000 g for a frequency range of DC-30 kHz determined from the beryllium bar are presented.

  16. The use of a beryllium Hopkinson bar to characterize a piezoresistive accelerometer in shock environments

    SciTech Connect

    Bateman, V.I.; Brown, F.A.; Davie, N.T.

    1996-03-01

    The characteristics of a piezoresistive accelerometer in shock environments are being studied at Sandia National Laboratories in the Mechanical Shock Testing Laboratory. A Hopkinson bar capability has been developed to extend our understanding of the piezoresistive accelerometer, in two mechanical configurations, in the high frequency, high shock environments where measurements are being made. In this paper, the beryllium Hopkinson bar configuration with a laser doppler vibrometer as the reference measurement is described. The in-axis performance of the piezoresistive accelerometer for frequencies of dc-50 kHz and shock magnitudes of up to 70,000 g as determined from measurements with a beryllium Hopkinson bar are presented. Preliminary results of characterizations of the accelerometers subjected to cross-axis shocks in a split beryllium Hopkinson bar configuration are presented.

  17. Bulk Micromachined 6H-SiC High-g Piezoresistive Accelerometer Fabricated and Tested

    NASA Technical Reports Server (NTRS)

    Okojie, Robert S.

    2002-01-01

    High-g accelerometers are needed in certain applications, such as in the study and analysis of high-g impact landings and projectiles. Also, these accelerometers must survive the high electromagnetic fields associated with the all-electric vehicle technology needed for aerospace applications. The choice of SiC is largely due to its excellent thermomechanical properties over conventional silicon-based accelerometers, whose material properties inhibit applicability in high electromagnetic radiation and high temperatures (>150 C) unless more complex and sometimes costly packaging schemes are adopted. This work was the outcome of a NASA Glenn Research Center summer internship program, in collaboration with Cornell University and the Munitions Directorate of the U.S. Air Force in Eglin, Florida. It aimed to provide the enabling technology infrastructure (modeling, fabrication, and validation) for the implementation of SiC accelerometers designed specifically for harsh environments.

  18. Validation of uniaxial and triaxial accelerometers for the assessment of physical activity in preschool children

    Technology Transfer Automated Retrieval System (TEKTRAN)

    Given the unique physical activity patterns of preschoolers, wearable electronic devices for quantitative assessment of physical activity require validation in this population. Study objective was to validate uniaxial and triaxial accelerometers in preschoolers. Room calorimetry was performed over 3...

  19. Quantified reflex strategy using an iPod as a wireless accelerometer application.

    PubMed

    LeMoyne, Robert; Mastroianni, Timothy; Grundfest, Warren

    2012-01-01

    A primary aspect of a neurological evaluation is the deep tendon reflex, frequently observed through the patellar tendon reflex. The reflex response provides preliminary insight as to the status of the nervous system. A quantified reflex strategy has been developed, tested, and evaluated though the use of an iPod as a wireless accelerometer application integrated with a potential energy device to evoke the patellar tendon reflex. The iPod functions as a wireless accelerometer equipped with robust software, data storage, and the capacity to transmit the recorded accelerometer waveform of the reflex response wirelessly through email for post-processing. The primary feature of the reflex response acceleration waveform is the maximum acceleration achieved subsequent to evoking the patellar tendon reflex. The quantified reflex strategy using an iPod as a wireless accelerometer application yields accurate and consistent quantification of the reflex response.

  20. Comparison of linear and non-linear models for predicting energy expenditure from raw accelerometer data.

    PubMed

    Montoye, Alexander H K; Begum, Munni; Henning, Zachary; Pfeiffer, Karin A

    2017-02-01

    This study had three purposes, all related to evaluating energy expenditure (EE) prediction accuracy from body-worn accelerometers: (1) compare linear regression to linear mixed models, (2) compare linear models to artificial neural network models, and (3) compare accuracy of accelerometers placed on the hip, thigh, and wrists. Forty individuals performed 13 activities in a 90 min semi-structured, laboratory-based protocol. Participants wore accelerometers on the right hip, right thigh, and both wrists and a portable metabolic analyzer (EE criterion). Four EE prediction models were developed for each accelerometer: linear regression, linear mixed, and two ANN models. EE prediction accuracy was assessed using correlations, root mean square error (RMSE), and bias and was compared across models and accelerometers using repeated-measures analysis of variance. For all accelerometer placements, there were no significant differences for correlations or RMSE between linear regression and linear mixed models (correlations: r  =  0.71-0.88, RMSE: 1.11-1.61 METs; p  >  0.05). For the thigh-worn accelerometer, there were no differences in correlations or RMSE between linear and ANN models (ANN-correlations: r  =  0.89, RMSE: 1.07-1.08 METs. Linear models-correlations: r  =  0.88, RMSE: 1.10-1.11 METs; p  >  0.05). Conversely, one ANN had higher correlations and lower RMSE than both linear models for the hip (ANN-correlation: r  =  0.88, RMSE: 1.12 METs. Linear models-correlations: r  =  0.86, RMSE: 1.18-1.19 METs; p  <  0.05), and both ANNs had higher correlations and lower RMSE than both linear models for the wrist-worn accelerometers (ANN-correlations: r  =  0.82-0.84, RMSE: 1.26-1.32 METs. Linear models-correlations: r  =  0.71-0.73, RMSE: 1.55-1.61 METs; p  <  0.01). For studies using wrist-worn accelerometers, machine learning models offer a significant improvement in EE prediction