SYSTEM AND METHOD FOR FAULT DETECTION IN SENSORS
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United States of America
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Issued Date -
Apr 10, 2025
app pub date -
Apr 18, 2024
filing date -
Apr 18, 2024
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Abstract
A sensing circuit is coupled to a sensor comprising first and second sensing elements. The sensing circuit detects changes in physical parameters by determining change in attributes of first and second sensing elements. The sensing circuit may include a switching circuit, first and second test elements, and a converter. During a normal mode, the switching circuit couples the first and second sensing elements to the converter to generate a first parameter value. During a fault diagnosis mode, the switching circuit couples one of (i) a first test element and the second sensing element and (ii) a second test element and the first sensing element to the converter to generate a second parameter value. The second parameter value is compensated to obtain a third parameter value that is further compared with the first parameter value to obtain a differential value. Based on the differential value, faults in the sensor are detected.
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