| 摘要 |
PURPOSE:To prevent the adverse effect on piezoelectric conversion of each piezoelectric element and to prevent occurrence of output errors, by adjusting the deviation of the phase and amplitude between the resonance frequencies of vibrating pieces in a vibration type angular velocity detector by an electric means. CONSTITUTION:Piezoelectric elements 15 and 17 are vibrated in the direction of (x) by resonance frequencies f1 and f2, respectively. Signals, which are converted into electric signals, are applied to an adder 23 through differential amplifiers 21b and 22b. The peak level of the added output in the adder 23 is held by a peak holding circuit 24. Its output is compared with a reference voltage by a differential amplifier 26. The gain of a gain control circuit 27 is controlled by the differential voltage. The signal, whose gain is controlled, is fed back to the differential amplifier 21b and also applied to an amplitude adjuster 28. The amplitude is controlled so that the amplitude of the output of the differential amplifier 22b agrees with the amplitude of the output of the differential amplifier 21b. A phase adjusting signal is formed based on the amplitude adjusting signal, and the output phases of both differential amplifiers 21b and 22b are made to be equal. |
