Solid state vibrating gyro

Details Solid state vibrating gyro Solid state vibrating gyro

1988-10-17

1989-12-05

Chapman, John

Measuring and testing

Speed, velocity, or acceleration

Angular rate using gyroscopic or coriolis effect

G01P 904

Patent

active

048844462

ABSTRACT:
An angular rate sensor is formed of a transducer and associated electronics. The transducer consists of two parallel beams with attached proof masses, which are angularly vibrated about respective proof masses center of gravity in a first plane. Rotation of the gyro about its input axis results in Coriolis moments causing vibration in a plane normal to the first plane. A torque is applied to restrain the vibration of the proof masses to the first plane. A voltage proportional to this torque is demodulated and filtered and output as a voltage proportional to the angular input rate.

REFERENCES:
patent: 3924474 (1975-12-01), Friedland et al.
patent: 4019391 (1977-04-01), Ljung
patent: 4654663 (1987-03-01), Alsenz et al.
patent: 4674331 (1987-06-01), Watson
T. Ueda, "Quartz Crystal Micromechanical Devices," IEEE Transducers 1985 Technical Digest, pp. 113-116.
J. Angell et al., "Silicon Micromechanical Devices," Scientific American, Apr. 1983, pp. 44-55.

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