ZERO SHIFT IN PIEZOELECTRIC TRANSDUCERS
A problem often encountered in the instrumentation of shocks with piezoelectric transducers is an apparent shift of the d-c reference axis from the normal zero position. High-level shocks along a transverse axis of the accelerometer cause the piezoelectric element to move slightly. Roughness of contact surfaces changes the forces applied to various areas so that a change of potential gradient remains after movement, and a positive or negative d-c voltage appears at the recorder and decreases exponentially back to the normal position as the bound charge is neutralized. The discussion describes extensive tests on Endevco Models 2213, 2214, and 2215, Glennite Model A314T, and CRL Model 606 accelerometers. A detalled explanation of all phenomena encountered is given. A discussion of the factors not influencing the shift is included. (auth)
- Research Organization:
- Sandia Corp., Albuquerque, N. Mex.
- NSA Number:
- NSA-14-003623
- OSTI ID:
- 4228034
- Report Number(s):
- SCTM-315-59(16)
- Country of Publication:
- United States
- Language:
- English
Similar Records
Piezoelectric ultrasound transducer for high temperature uses
High Shock, High Frequency Characteristics of a Mechanical Isolator for a Piezoresistive Accelerometer, the ENDEVCO 7270AM6*