Measuring and testing – Speed – velocity – or acceleration – Angular rate using gyroscopic or coriolis effect
Patent
1992-03-13
1993-03-30
Chapman, John E.
Measuring and testing
Speed, velocity, or acceleration
Angular rate using gyroscopic or coriolis effect
G01P 904
Patent
active
051973316
ABSTRACT:
An oscillatory angular speed detecting apparatus is disclosed which includes a pillar-shaped oscillator body and drive and readout piezoelectric transducers attached to first, second, and third surfaces of the oscillator body, the first side surface being perpendicular to the second side surface and the third side surface being parallel to the first side surface, in which vibration of the oscillator body is transduced into a readout signal by the readout transducer. A phase detecting device detects variations of phases of the readout signals, and an amplitude detecting device detects variations of amplitudes of the readout signals, and the angular speed is detected from the phases detected by the phase detecting device and/or the amplitude detected by the amplitude detecting device.
REFERENCES:
patent: 3520195 (1970-07-01), Tehon
patent: 4409836 (1983-10-01), Comroe et al.
"Solid State Angular Rate Sensor (VYRO)", AIAA Publication 80-1742, 1980, pp. 183-187.
S. Sugawara et al., "Angular Rate Detection Utilizing Phase Shift in a Piezoelectric Vibratory Gyro," Japan Journal of Applied Physics, vol. No. 26 (1987), suppl 26-2, pp. 171-173.
"Angular Rate Detection by Phase Shift in a Piezoelectric Vibratory Gyro (Principle)" Japan Acoustics Society Transactions, Mar. 1987, pp. 683-684.
"Development of Vibrational Rate Sensor and Navigation System," T. Oikawa et al., in Recent Developments in Automotive Electronic Displays and Information Systems, SAE No. S-694, pp. 57-65; Feb. 1987.
W. D. Gates, "Vibrating Angular Rate Sensor may Threaten the Gyroscope," Electronics, Jun. 10, 1968, pp. 130-134.
Chapman John E.
Yazaki -Corporation
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