Method and apparatus for detecting failure in vibrating sensors

Details Method and apparatus for detecting failure in vibrating sensors Method and apparatus for detecting failure in vibrating sensors

1997-01-27

1999-02-02

Noland, Thomas P.

Measuring and testing

Instrument proving or calibrating

Angle, direction, or inclination

73 138, 73 179, 73 182, G01P 2100, G01C 2500

Patent

active

058667962

ABSTRACT:
A yaw sensor for automotive controls has a microstructure vibrating ring excited by a driving circuit. The driving circuit comprises an amplitude control loop which delivers voltage pulses at the resonant frequency of the ring. A compensation signal is derived from a comparison of a sensed vibration amplitude to a desired vibration amplitude. Failure of vibration is detected by comparing the compensation signal to a threshold which is higher than a normal compensation signal. Alternatively, vibration failure is detected by comparing the sensed vibration to a threshold lower than the desired vibration amplitude. Upon such failure, the yaw output signal is replaced by ground potential.

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