Vibrator and detector circuit for vibrating gyro

Details Vibrator and detector circuit for vibrating gyro Vibrator and detector circuit for vibrating gyro

1994-02-16

1995-07-18

Budd, Mark O.

Electrical generator or motor structure

Non-dynamoelectric

Piezoelectric elements and devices

310316, 310369, 310321, H01L 4108

Patent

active

054344670

ABSTRACT:
A vibrator 1 of a vibrating gyro includes a cylindrical vibrating body 2 made of a piezoelectric ceramic and three electrodes 3, 4, and 5 formed symmetrically with respect to an axis of symmetry 8. A driver power source S0 applies an AC voltage V across the common electrode 3 and the other two electrodes 4, 5 via current detector/driver means 20 and 30, which include an operational amplifier 21 and 31 and a feedback resistor 22 and 32. The outputs of the current detector/driver means 20 and 30 corresponding to the currents i.sub.L and I.sub.R flowing through the electrodes 4 and 5 are input to a differential amplifier 40, the output of which represents the angular velocity of the vibrator 1.

REFERENCES:
patent: 4836023 (1989-06-01), Oikawa
patent: 5049776 (1991-09-01), Ogawa
patent: 5117148 (1992-05-01), Nakamura
patent: 5220833 (1993-06-01), Nakamura
patent: 5270607 (1993-12-01), Terajima
patent: 5287033 (1994-02-01), Morton
patent: 5336960 (1994-08-01), Shimizu et al.

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