Angular velocity sensor and a sensor apparatus incorporating the

Details Angular velocity sensor and a sensor apparatus incorporating the Angular velocity sensor and a sensor apparatus incorporating the

1990-07-06

1992-07-21

Chapman, John E.

Measuring and testing

Speed, velocity, or acceleration

Angular rate using gyroscopic or coriolis effect

73497, G01P 904

Patent

active

051312735

ABSTRACT:
An angular velocity sensor includes a pair of vibratory piezoelectric detecting elements defining detecting planes which are disposed in symmetry about a plane containing the sense axis and out of right-angled orientation with respect to this plane. The detecting elements thus arranged assume a widely spread or flattened V-shaped configuration as viewed from above. Output signals of opposite polarities received from the respective detecting elements are weighted respectively and added together so as to cancel out unwanted leak component signals. Thus, leak component signals resulting from assembling tolerances can be canceled. In this instance, if the characteristics of two sensor elements each including one of the detecting elements are fully equivalent, a leak component signal dependent on a disturbing inertial force can simultaneously be canceled out. With this construction, the variation of the offset voltage can be reduced even when the sensor is subjected to a great change in environmental conditions including temperature.

REFERENCES:
patent: 4520669 (1985-06-01), Rider
patent: 4628734 (1986-12-01), Watson
patent: 4671112 (1987-06-01), Kimura et al.
patent: 4791815 (1988-12-01), Yamaguchi et al.
"Journal of the Japan Society For Aerological and Space Sciences" vol. 23, No. 257, pp. 339-350 (Jun. 1975).

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