Detecting circuit for detecting an abnormal state in a vibrating

Details Detecting circuit for detecting an abnormal state in a vibrating Detecting circuit for detecting an abnormal state in a vibrating

1991-12-05

1994-03-15

Chapman, John E.

Measuring and testing

Speed, velocity, or acceleration

Angular rate using gyroscopic or coriolis effect

73 1D, G01P 904, G01P 2100

Patent

active

052937798

ABSTRACT:
A detecting circuit 10 has two diodes 16a and 16b for rectifying an oscillation signal for driving a vibrator of a vibrating gyroscope and a detection signal for detecting a rotary angular velocity of the vibrator in the directions reverse to each other. The diodes 16a and 16b are connected with two resistors 20a and 20b for composing these rectified signals. A connection point 21 of the resistors 20a and 20b is connected to a base of a PNP transistor 22. The emitter of the transistor 22 is connected to a positive potential and a collector thereof is grounded through a resistor Further, to the collector of the transistor 22, an output terminal 28 is connected.

REFERENCES:
JEE Journal of Electronic Engineering vol. 27, No. 285, Sep. 1990, Tokyo, JP pp. 99-104, T. Nakamura, "Vibration Gyroscope Employs Piezoelectric Vibrator".

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