Results 131 to 140 of about 3,239 (167)

Accelerometer with piezoelectric element

The Journal of the Acoustical Society of America, 1992
The seismic mass is fixed to the mounting base by a tension bolt. This bolt passes with an important play through an opening of the piezoelectric transducer arranged between the mounting base and the seismic mass. Under the influence of inertial forces which act perpendicularly to the axis of the bolt on the seismic mass, bending loads occur which ...
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Miniaturized accelerometer with piezoelectric fet

The Journal of the Acoustical Society of America, 1984
An accelerometer comprising a piezoelectric device hard mounted to the gate electrode of a field effect transistor, thus avoiding the capacitance of an interconnecting coaxial cable connection and providing, therefore, improved frequency response in a smaller, more efficient package.
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Piezoelectric Accelerometer State Checking during Use

Measurement Techniques, 2001
Methods are examined for checking out a piezoelectric accelerometer during use. A method is described for checking the conversion factor that employs a new method of exciting resonant oscillations.
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The Reciprocity Calibration of Piezoelectric Accelerometers

The Journal of the Acoustical Society of America, 1952
Two piezoelectric accelerometers have been calibrated by an absolute reciprocity technique in the frequency range from 100 cps to 10 kc. A theoretical and experimental evaluation of the technique is given.
Mark Harrison, A. O. Sykes, Paul G. Marcotte   +2 more
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A piezoelectric, flexural-disk, neutrally buoyant, underwater accelerometer

IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control, 1998
A piezoelectric, flexural-disk accelerometer for underwater use is composed of two PZT-5A lead zirconate-titanate disks that are bonded to an aluminum substrate. The substrate is edge-supported inside an aluminum housing. The housing is enclosed in syntactic foam so that the sensor is neutrally buoyant. The overall height is 1.0 in.
M B, Moffett, D H, Trivett, P J, Klippel, P D, Baird   +3 more
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Noise Immune Charge Amplifier for Piezoelectric Accelerometers

Instruments and Experimental Techniques, 2001
A charge amplifier with active in-phase interference suppression is intended for investigations at impact loads accompanied by high-level noises. To suppress low-frequency in-phase interfering signals, a compensation circuit with a differential amplifier is used, and, to suppress high-frequency ones, an input longitudinal transformer is used.
V. A. Kolyasev, S. V. Len'kov, S. M. Molin   +2 more
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Ultra-Low Noise Mems Piezoelectric Accelerometers

The Journal of the Acoustical Society of America, 2011
Sensing structures are provided which are designed using non-conventional designs. These sensing structures have improved sensitivity and noise floor at low frequencies.
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Mathematical model of piezoelectric MEMS accelerometer

2008 International Conference on Perspective Technologies and Methods in MEMS Design, 2008
In this paper mathematical model of the piezoelectric accelerometer based on unimorph cantilever beam 31 direction was considered. Numerical verification of the mathematical model was performed.
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Design of novel thin-film piezoelectric accelerometer

Sensors and Actuators A: Physical, 1996
A novel piezoelectric thin-film accelerometer has been designed and its performance has been analysed. The piezoelectric thin film (PZT for example) is delineated into an array of pads to reduce the sensor capacitance. By filling the cavity around the PZT pads either with a polymer or a gas with controlled pressure, damping can be controlled.
Y. Nemirovsky, A. Nemirovsky, P. Muralt, N. Setter   +3 more
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Fundamental Noise Limit of Piezoelectric Accelerometer

IEEE Sensors Journal, 2004
Since significant progress is achieved in the development of piezoelectric (PE) accelerometers for small signal applications nowadays (for example, piezoelectric seismic vibration sensors), the question about the fundamental noise limit of these sensors becomes vital. The noise of the PE transducer is the fundamental noise limit of the PE accelerometer
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