Title :
Energy trapping of thickness-shear vibrations excited by parallel electric field and its application to piezoelectric vibratory gyroscopes
Author :
Abe, Hiroshi ; Yoshida, Tetsuo ; Watanabe, Hiroshi
Author_Institution :
R&D Center, Tokin Corp., Kanagawa, Japan
Abstract :
The energy trapping of thickness shear vibrations, which are excited by parallel electric field in a partially polarized piezoelectric ceramic plate, is studied, and the mechanism of energy trapping is theoretically and experimentally clarified. A new piezoelectric vibratory gyroscope with three electrodes using the energy trapping of thickness-shear vibrations is proposed and experimental results are presented. The results show that high reliability vibratory gyroscopes with the ease in mechanical support can be realized because of the energy trapping effect. A detection sensitivity of 2.8 mV/deg/sec is obtained
Keywords :
Coriolis force; angular velocity measurement; crystal resonators; gyroscopes; piezoceramics; vibrations; 1D analysis; Coriolis force; angular velocity sensor; dispersion curve; energy trapping; high reliability vibratory gyroscopes; parallel electric field excited; partially polarized piezoelectric ceramic plate; piezoelectric vibratory gyroscopes; thickness-shear vibrations; three electrodes; Ceramics; Constitution; Cutoff frequency; Electrodes; Gyroscopes; Piezoelectric polarization; Propagation constant; Resonance; Resonant frequency; Strips;
Conference_Titel :
Ultrasonics Symposium, 1998. Proceedings., 1998 IEEE
Conference_Location :
Sendai
Print_ISBN :
0-7803-4095-7
DOI :
10.1109/ULTSYM.1998.762190
