A digital measurement system based on laser displacement sensor for piezoelectric ceramic discs vibration characterization
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Date
2016
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Abstract
This study describes the innovative design of a digital measurement system based on a laser displacement sensor (LDS) as a vibrometer which is capable to measure a dynamic displacement response dependence on a stimulated vibration. The frequency response of a piezoelectric ceramic disc is obtained by processing the input/output signals obtained from the function generator and digital oscilloscope (digitizer) cards driven by a personal computer. Resonant frequencies of vibration are achieved utilizing the swept-sine signal excitation following the peak values in the signal response measured by LDS. The analogue signal from LDS controller represents directly a mechanical vibration of a piezoceramic disc. The test measurement results indicate that the system can distinguish resonance frequencies of piezoelectric ceramic discs up to 40 kHz with the resolution 1 Hz. Piezoelectric coefficient d33 and its linearity along the excited voltage amplitudes have been calculated by the applied methods as a demonstration of a successful system concept. The results achieved are in compliance with the reference value declared by the manufacturer of the piezoceramic disc. © 2015 Elsevier GmbH. All rights reserved.
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Keywords
Cathode ray oscilloscopes , Ceramic materials , Design , Frequency response , Natural frequencies , Personal computers , Piezoelectric ceramics , Piezoelectricity , Vibrations (mechanical) , Digital measurement systems , Digital oscilloscope , Dynamic displacements , Laser displacement sensors , Piezoelectric ceramic discs , Piezoelectric coefficient , Resonance frequencies , Vibration , Displacement measurement