Method for shunt detection in sensors

Details Method for shunt detection in sensors Method for shunt detection in sensors

2007-10-02

2007-10-02

Barlow, John (Department: 2863)

Electricity: measuring and testing

Magnetic

Magnetometers

C340S870280, C324S701000, C324S537000, C702S064000

Reexamination Certificate

active

11191839

ABSTRACT:
For monitoring a sensor using differential voltage evaluation for detecting a short circuit to ground and/or to supply voltage UB, a first resistor and a second resistor R1, R2are assigned to the sensor, a sum voltage is determined from voltages UP, UMat terminals of the sensor, the sum voltage is compared to supply voltage UB, a ratio a of determined sum voltage to supply voltage UBis then calculated, and depending on the value for the ratio a, the occurrence of a shunt at the positive terminal and/or negative terminal of the sensor is detected.

REFERENCES:
patent: 3660750 (1972-05-01), Businelli
patent: 5260644 (1993-11-01), Curtis
patent: 6208175 (2001-03-01), Zydek et al.
patent: 6317056 (2001-11-01), Klumpp et al.
patent: 6756782 (2004-06-01), Van Zon

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