Method and apparatus for compensating a sensor

Details Method and apparatus for compensating a sensor Method and apparatus for compensating a sensor

G - Physics

05

B

354/97

G05B 1/02 (2006.01) G01D 3/00 (2006.01) G01D 18/00 (2006.01) G06F 17/40 (2006.01)

Patent

CA 1165888

ABSTRACT OF THE DISCLOSURE A sensor is compensated through the use of a closed loop comprising a digital processor, a digital-to-analog converter and a comparator having inputs coupled to the converter and the sensor and an output fed back to the digital processor. During calibration of the sensor, a signal from the sensor is tracked by the digital processor and at least one of the values characteristic of the sensor signal is stored in the digital processor. The stored value is used as a or in the computation of a reference by the digital processor which is compared with the sensor signal during operation of the sensor to approximately compensate the sensor for gain, offset, drift or degradation in the quality of the sensor signal.

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