Piezoelectric vibratory rate sensor

Details Piezoelectric vibratory rate sensor Piezoelectric vibratory rate sensor

1989-12-26

1991-10-15

Chapman, John E.

Measuring and testing

Speed, velocity, or acceleration

Angular rate using gyroscopic or coriolis effect

G01P 904

Patent

active

050563661

ABSTRACT:
A vibrating rotation rate sensor of the type that includes a generally-planar, H-shaped frame of piezoelectric material such as quartz. A first set of drive electrodes is fixed to a pair of upper tines and a second set of pickoff electrodes is fixed to a pair of lower tines. An array of control electrodes is fixed to the upper tine pair adjacent the cross-piece of the H-shaped frame. The control electrodes permit the application of control signals for nulling Coriolis-induced out-of-plane vibration of the upper tines allowing use of a resonant frame.

REFERENCES:
patent: 4524619 (1985-06-01), Staudte
patent: 4538461 (1985-09-01), Juptner et al.
patent: 4654663 (1987-03-01), Alsenz et al.
patent: 4655081 (1987-04-01), Burdess
patent: 4898032 (1990-02-01), Voles
General Precision Instruments, "GPI Quartz Angular Rate Sensor" (Oct. 1985).

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