Data processing: vehicles – navigation – and relative location – Vehicle control – guidance – operation – or indication – Vehicle diagnosis or maintenance indication
Patent
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.
Nunneley John
Sugawara Hayato
Chin Gary
Hitachi America Ltd.
Sideris John J.
LandOfFree
Method and apparatus for diagnosing and isolating faulty sensors does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method and apparatus for diagnosing and isolating faulty sensors, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus for diagnosing and isolating faulty sensors will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1866108