| 摘要 |
PURPOSE:To obtain a piezoelectric vibration gyro wherein a structure is simple, adhesive agent is not needed, a fluctuation in characteristics is small and zero balance adjustment at the time of no rotation is possible by a simple electric circuit. CONSTITUTION:2n (n is an integer of 3 or larger) stripe electrodes 2l which equally divide a circumference are formed in parallel with a lengthwise direction of a piezoelectric ceramic cylinder 10 on an outer peripheral surface of the piezoelectric ceramic cylinder 10. The piezoelectric ceramic cylinder 10 is bent and vibrated substantially in the direction of a symmetric surface by applying exciting ac voltage having frequency approximately equal to the resonant frequency of a bending vibration mode of the piezoelectric ceramic cylinder to (m) (m is a natural number) stripe electrode slits which are arranged symmetrically with respect to the surface containing the center line of one of the stripe electrodes 21 and the center axis of the piezoelectric ceramic cylinder 10. In addition, a piezoelectric vibration gyro for detecting voltage generated on one or a plurality of stripe electrode slits located symmetrically with respect to the symmetric surface can be obtained. |
