Method and apparatus for diagnosing and isolating faulty sensors

Details Method and apparatus for diagnosing and isolating faulty sensors Method and apparatus for diagnosing and isolating faulty sensors

1996-07-30

1998-05-19

Chin, Gary

Data processing: vehicles, navigation, and relative location

Vehicle control, guidance, operation, or indication

Vehicle diagnosis or maintenance indication

701 63, 701 76, 701 92, 340438, 324537, 324555, G06F 1100

Patent

active

057549630

ABSTRACT:
A sensor failure and detection apparatus and method for use in a redundant sensor system are disclosed. A control circuit disconnects reference power supplied to a sensor and then monitors the voltage decay output by the sensor. The monitored rate of voltage decay of the sensor is compared to the expected natural voltage decay of the sensor to detect failures caused by short or open circuits. An error counter keeps track of the number of failures. After a threshold number of times in which the monitored voltage decay does not compare to a predicted rate of decay, power to the sensor is removed and the sensor is isolated from the system.

REFERENCES:
patent: 3594788 (1971-07-01), Seelig
patent: 4001676 (1977-01-01), Hile et al.
patent: 4408155 (1983-10-01), McBride
patent: 4408289 (1983-10-01), Boning et al.
patent: 4583176 (1986-04-01), Yamato et al.
patent: 4845435 (1989-07-01), Bohan
patent: 4920939 (1990-05-01), Gale
patent: 4922425 (1990-05-01), Mack et al.
patent: 4979117 (1990-12-01), Hattori et al.
patent: 5008823 (1991-04-01), Takahashi
patent: 5017910 (1991-05-01), Farber et al.
patent: 5095453 (1992-03-01), Pierson et al.
patent: 5250909 (1993-10-01), Bitts
patent: 5359290 (1994-10-01), Cervas
patent: 5375056 (1994-12-01), Nitschke et al.
patent: 5394093 (1995-02-01), Cervas
patent: 5394341 (1995-02-01), Kepner
patent: 5617337 (1997-04-01), Eidler et al.

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