Vibrating beam gyroscopic measuring apparatus

Details Vibrating beam gyroscopic measuring apparatus Vibrating beam gyroscopic measuring apparatus

1996-01-11

1997-01-28

Oda, Christine K.

Measuring and testing

Speed, velocity, or acceleration

Angular rate using gyroscopic or coriolis effect

310333, G01P 1514

Patent

active

055979556

ABSTRACT:
A rate gyro or a gyroscope includes a resonator having four mutually parallel identical beams integral with a common square base and projecting from the base at corners of a virtual square. The beams have a same resonant frequency in two directions parallel to the two sides of the square base. It further has first transducers for vibrating each beam in a first direction orthogonal to the beams, connected to a driving circuit and second transducers for detecting an amplitude of vibration of the beams in a second direction each orthogonal to a respective first direction.

REFERENCES:
patent: 3127775 (1964-04-01), Hansen et al.
patent: 5166571 (1992-11-01), Konno
Japanese Journal of Applied Physics, Proc. 11th Symp. on Ultrasonic Electics vol. 30, No. 30-1, 1991, Yokohama, pp. 129-131 XP305670.
Sugawara et al "Equivalent circuit and construction of piezoelectric vibratory gyroscopes using a flexurally-vibrating resonator with a square cross section", p. 129, col. 2, 1. 1-1. 9; FIGS. 1, 2, 5.

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