System and method for automated shunt calibration of a sensor
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United States of America Patent
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Jan 12, 2016
Grant Date -
Sep 4, 2014
app pub date -
Mar 1, 2013
filing date -
Mar 1, 2013
priority date (Note) -
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status (Latency Note)
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Abstract
A sensor assembly may include a Wheatstone bridge with one or more sense elements, an amplifier coupled to the Wheatstone bridge for providing a sensor output signal, a resistor, and a switch for connecting the resistor between the sensor and an adjustable power source output to induce an offset in the sensor output signal. In some instances, a controller may perform an automatic shunt calibration procedure by activating the switch to connect the resistor between the sensor and the adjustable power source output to induce an offset in the sensor output signal. The controller may read the output value and compare the output value with a predetermined value. The controller may adjust the power source output to a value that moves the sensor output value toward the predetermined value. The controller may repeat the reading, comparing and adjusting step until the sensor output value is within a predetermined range of the predetermined value.
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