Measurement by laser interferometer of microdisplacements in piezoelectric devices under electric excitation
Abstract
The electrical impedance and the most important electromechanical parameters of the commercial piezoelectric device PZT-5A were measured. With a high resolution laser interferometer, the amplitude of the vibrations at the surface were determined and related to the electric load characteristics. The experimental results were compared with estimations from a one dimensional theoretical model. The measurements are part of a program for defining vibration control techniques for ultrasound transducers and for absolute calibration of sensors. The characteristics and sensibility of an experimental piezoelectronic acoustical transducer are also presented.
- Publication:
-
NASA STI/Recon Technical Report N
- Pub Date:
- August 1981
- Bibcode:
- 1981STIN...8222486D
- Keywords:
-
- Displacement Measurement;
- Electromechanical Devices;
- Laser Interferometry;
- Piezoelectric Transducers;
- Calibrating;
- Design Analysis;
- Impedance Measurement;
- Vibration Measurement;
- Instrumentation and Photography