Measuring and testing – Instrument proving or calibrating – Speed – velocity – or acceleration
Patent
1995-07-10
1997-07-29
Noland, Thomas P.
Measuring and testing
Instrument proving or calibrating
Speed, velocity, or acceleration
7350412, 7351429, 73 186, G01P 2100
Patent
active
056523742
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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Chia Michael Ik-Ming
Johnson Jack Daniel
Wright Carl David
Delco Electronics Corp.
Moore Mary S.
Navarre Mark A.
Noland Thomas P.
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