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1. ME 117/220: Lab#3: Accelerometer
- cdr.stanford.edu
- Build Your Own Accelerometer .
- In this lab, you and your lab partners will build an accelerometer using a piezoelectric film from AMP, some circuit elements provided by the NSF Synthesis Coalition, and any other materials you find useful. ...
- Your accelerometer system is required to have sensitivity between 0. ... This calibration stand includes a reference ADXL05 accelerometer. ...
- Given the results of these 2 measurements, calculate the sensitivity of this accelerometer (the piezo element plus the mass plus the circuit). ...
- Design an accelerometer based on your measurements of voltage signal, and mechanical stiffness, which will produce the required sensitivity. ... Be sure that the device you build is an Accelerometer, not a Seismometer. ...
- There will be an operating manual for the accelerometer calibration facility available in the lab. In your report, describe the calibration procedure you decided to use, the results you obtained, and whatever conclusions you can draw about how well your accelerometer functioned. ...
- Write-up : Your lab Writeup should include some discussions of your design, measurements made, final schematics, discussion of sensor performance - vs - expectations, and conclusions about accelerometer design. ...
2. how sensors work - accelerometer
- www.sensorland.com
- THE PIEZOELECTRIC ACCELEROMETER (Compression Type) Accelerometers for the measurement of acceleration, shock or vibration come in many types using different principles of operation. ... In the accelerometer, this crystal is bonded to a mass such that when the accelerometer is subjected to a 'g' force, the mass compresses the crystal which emits a signal. ... For details of ACCELEROMETER Suppliers, who can provide detailed information, please click SUPPLIERS, then select ACCELERATION, VIBRATION or SHOCK sections. ...
3. Theory of Operation
- bits.me.berkeley.edu
- Lab Room | Apparatus Map | Accelerometer | Theory of Operation.
- By modelling the primary transducer, we can predict the mechanical response of the accelerometer to different accelerations. ...
- where: m is the seismic mass, c is the damping constant, k is the spring constant, z is the position of the seismic mass relative to the housing (z = y - x), y is the absolute position of the mass, and x is the absolute position of the accelerometer housing. ...
4. Tunneling Accelerometer
- design.stanford.edu
- Tunneling Accelerometer Basic Structure and Physics (early version design developed at JPL) .
- The above picture shows the dual-element micromachined tunneling accelerometer for NAVY sonobuoy application. ... This prototype tunneling accelerometer was originally developed by JPL. ... Modeling (linear and nonlinear) and feedback control are used to improve the accelerometer performance. ...
- This tunneling accelerometer comprises a proof mass, a wide-bandwidth cantilever and feedback control circuit. ...
- Operation of this accelerometer uses electronic feedback circuit to maintain a constant tip-to cantilever spacing, 10 Angstroms, by controlling the electrostatic deflection voltages on the proof mass and the wide-bandwidth cantilever. ...
5. Silicon Designs, Inc. -- MEMS Accelerometer Technology Report
- www.silicondesigns.com
- (SDI) has developed a miniature accelerometer technology which combines additive micro machining and integrated circuit technology to produce a highly reliable, capacitive, acceleration sensor. ...
- MEMS ACCELEROMETER .
- This allows the capacitive accelerometer to be used in a wider range of applications.
- Silicon Designs' basic accelerometer unit is a 20 pin LCC package containing two parts: the Sense Element or sensor chip and the integrated electronics or ASIC chip (see figure below). ... Built with one of two ASIC chips to provide either an Analog or Digital output, this basic accelerometer can be easily surface mounted to a circuit board and is used to build all of SDI's single and three axis modules.
- Accelerometer Packaging .
- Most test equipment and older accelerometer systems are based on analog sensors. This makes it simple to switch to a higher performance SDI accelerometer (analog 1210) without major redesign and allows for the use of familiar analog signal processing techniques. The availability of a digital accelerometer (digital 1010) allows for easy integration with modern microprocessor based systems without the trouble of additional A/D conversion. A simple microprocessor, such as one from Microchip's PIC series, is all that is needed to read the accelerometer output. ...
- (Analog Accelerometer) -- ( Digital Accelerometer) .
6. Measurement Specialties Announces New Accelerometer for Auto Safety Crash Test Applications
- www.prnewswire.com
- --> Measurement Specialties Announces New Accelerometer for Auto Safety Crash Test Applications FAIRFIELD, N. ... (Amex: MSS), a designer and manufacturer of sensors and sensor-based consumer products, announced today that its new Model 64 piezoresistive accelerometer is now available for dynamic measurement professionals requiring accurate, reliable data for auto safety crash test applications. ... "This small, rugged accelerometer features MSI's second generation piezoresistive MEMS sensor element," noted Anthony Chu, Director, Vibration Business Unit. ...
7. Accelerometer
- bits.me.berkeley.edu
- Lab Room | Apparatus Map | Accelerometer.
- Accelerometer.
- As our accelerometer reacts to motion, it places the piezoelectric crystal into compression or tension, which causes a surface charge to develop on the crystal. ... As the large body moves, the mass of the accelerometer will move with an inertial response. ...
8. Silicon Designs, Inc. --Home-- 2 to 1000g Capacitive Accelerometers for DC, AC and Tilt Measurements
- www.silicondesigns.com
- Accelerometer Module.
- • VARIOUS ACCELEROMETER OUTPUTS:.
- ACCELEROMETER APPLICATIONS .
- Integrated accelerometer electronics provide a high level, low impedance output to minimize environmental noise pickup, and no separate charge amplifiers are needed. ...
- Our Accelerometer products offer a wide variety of standard g-ranges, form factors, and output styles to suit any application. Custom Accelerometer packaging, outputs, and screenings are available on a per case basis.
- Single Axis & Triaxial Accelerometer Modules .
9. Accelerometer Theory
- www2.msstate.edu
- THE PIEZOELECTRIC ACCELEROMETER.
- In the accelerometer, this crystal is bonded to a mass.
- such that when the accelerometer is subjected to a 'g'.
10. Accelerometer Schematic
- www.ghg.net
- Accelerometer Schematic.
- Below is a rough schematic of the layout of the accelerometer PC board looking from the component side. ...
- The accelerometer itself is a surface mount chip and is thus shown from the bottom on this schematic as if you were looking through the board. ... The accelerometer has an external resistor used to select the data rate and external capacitors to smooth the output. ... There is a jumper next to the accelerometer that can be used to perform a self test. I never used this feature but it's explained by the accelerometer datasheet which is available from the Analog Devices web site. ...
11. 5.05 Measurements of Winds in the Martian Upper Atmosphere from the MGS Accelerometer
- www.aas.org
- 05 Measurements of Winds in the Martian Upper Atmosphere from the MGS Accelerometer.
- We present a new technique for deriving winds from atmospheric density measurements and apply it to the martian upper atmosphere using MGS accelerometer data. ...
- We have used the MGS accelerometer's upper atmospheric density profiles from aerobraking, together with the assumptions of hydrostatic equilibrium and negligible winds, to derive atmospheric pressure profiles along the spacecraft trajectory around periapsis. ...
12. 3.3 Accelerometer (Analog Devices ADXL50)
- www-ccrma.stanford.edu
- 3 Accelerometer (Analog Devices ADXL50) .
- The basic physical principle behind this accelerometer (as well as many others), is that of a simple mass spring system. ... This is said to be a single axis accelerometer. ...
- Figure 9: Mass-spring system used in the Analog Devices ADXL50 accelerometer .
- The Analog Devices ADXL50 is a micro-machined stand-alone accelerometer which consists of a mass spring system as well as a system to measure displacement and the appropriate signal conditioning circuitry (which is the topic of the next section). ...
- Figure 11: The dual Capacitor system used to measure displacement in the Analog Devices ADXL50 accelerometer .
- Figure 12: Block diagram of the Analog Devices ADXL50 accelerometer .
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