Rate sensor

Details Rate sensor Rate sensor

1997-10-08

1999-06-22

Williams, Hezron

Measuring and testing

Speed, velocity, or acceleration

Angular rate using gyroscopic or coriolis effect

7350402, G01P 904

Patent

active

059152761

ABSTRACT:
A rate sensor for sensing applied rate on at least two axes is provided. A vibrating structure is vibrated in a Cos 2.theta. carrier mode at a Cos 2.theta. carrier mode frequency such that rotation about one or the other of the two axes will generate a Coriolis force sufficient to cause a rocking motion and rocking mode vibration of the vibrating structure about the same axis out of the plane of the vibrating structure at the Cos 2.theta. carrier mode frequency. The vibrating structure has a substantially planar, substantially ring or hoop-like form that is shaped and dimensioned to match the frequencies of the Cos 2.theta. carrier mode and the rocking mode vibration in the vibrating structure to give a resonant amplification of the rocking motion. The rocking mode vibration is proportional to the applied rate. The rocking mode vibration is detected to determine the applied rate.

REFERENCES:
patent: 5226321 (1993-07-01), Varnham et al.
patent: 5471875 (1995-12-01), Sato et al.
patent: 5540094 (1996-07-01), Varnham et al.
patent: 5587529 (1996-12-01), Iguchi et al.
patent: 5621171 (1997-04-01), Fell

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