APPARATUS AND METHOD FOR DIAGNOSTICS OF A CAPACITIVE SENSOR WITH PLAUSIBILITY CHECK

摘要

In at least one embodiment, an apparatus for diagnosing a state of a capacitive sensor is provided. The apparatus comprises a measuring circuit for being electrically coupled to a capacitive sensor. The measuring circuit is configured to measure a first impedance of the capacitive sensor at a first frequency and to determine a first capacitance of the capacitive sensor at the first frequency based on the first impedance. The measuring circuit is further configured to compare the first capacitance of the capacitive sensor to a first threshold and to a second threshold to diagnose the capacitive sensor.

主权项

1. An apparatus for diagnosing a state of a capacitive sensor, the apparatus comprising:
a measuring circuit for being electrically coupled to a capacitive sensor, the measuring circuit being configured to:
measure a first impedance of the capacitive sensor at a first frequency;determine a first capacitance of the capacitive sensor at the first frequency based on the first impedance; andcompare the first capacitance of the capacitive sensor to a first threshold and to a second threshold to diagnose the capacitive sensor.