Angular rate sensor having a tuning-fork structure

Details Angular rate sensor having a tuning-fork structure Angular rate sensor having a tuning-fork structure

1991-01-18

1993-05-25

Chapman, John E.

Measuring and testing

Speed, velocity, or acceleration

Angular rate using gyroscopic or coriolis effect

310329, G01P 904

Patent

active

052129853

ABSTRACT:
An angular rate sensor of the type, using oscillation of piezoelectric elements, which includes a pair of sensor elements each including a vibratory piezoelectric detecting element and a vibratory piezoelectric drive element joined together by a joint member in longitudinal alignment and oriented substantially at right angles relative to each other, and a resilient joint member joining the pair of sensor elements at respective free ends of the drive elements so as to form, jointly with the sensor elements, a tuning-fork structure. The turning-fork structure has an improved joint structure between each of the driving elements and the resilient joint member, which has a thickness to width ratio of approximately 3:10 to 7:10 to enable the angular rate sensor to have a low resonance impedance and stable performance characteristics.

REFERENCES:
patent: 4628734 (1986-12-01), Watson
patent: 4671112 (1987-06-01), Kimura et al.
patent: 5014554 (1991-05-01), Terada et al.

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