Vibrating gyroscope having a constant detecting sensitivity

Details Vibrating gyroscope having a constant detecting sensitivity Vibrating gyroscope having a constant detecting sensitivity

1996-12-03

1998-06-02

Oda, Christine K.

Measuring and testing

Speed, velocity, or acceleration

Angular rate using gyroscopic or coriolis effect

G01P 344

Patent

active

057603030

ABSTRACT:
A vibrating gyroscope 10 includes a vibrator 12 which has a regular triangular prism-shaped vibrating body 14 and piezoelectric elements 16a, 16b and 16c formed on side faces of the vibrating body 14. The piezoelectric elements 16a, 16b and 16c having approximately same temperature characteristics are used. An oscillation circuit 26 is connected between the piezoelectric elements 16a, 16b and the piezoelectric element 16c. The piezoelectric elements 16a and 16b are connected to a differential amplifying circuit 28, and the differential amplifying circuit 28 is connected to a detecting circuit 30. An output signal of the piezoelectric element 16c for feedback is half-wave rectified by a half-wave rectification circuit 32, and smoothed by a smoothing circuit 34. An output signal of the smoothing circuit 34 is supplied to an automatic gain control circuit 36, and a gain of the detecting circuit 30 is controlled according to the input signal of the automatic gain control circuit 36.

REFERENCES:
patent: 4479098 (1984-10-01), Watson
patent: 4671112 (1987-06-01), Kimura et al.
patent: 5014554 (1991-05-01), Terada et al.
patent: 5049776 (1991-09-01), Ogawa
patent: 5197331 (1993-03-01), Oikawa
patent: 5216315 (1993-06-01), Terada et al.
patent: 5349857 (1994-09-01), Kasanami et al.
patent: 5408876 (1995-04-01), Macy

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