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SENSOR ASSEMBLY FOR A MOTOR VEHICLE

  • US 20160230441A1
  • Filed: 02/11/2016
  • Published: 08/11/2016
  • Est. Priority Date: 02/11/2015
  • Status: Active Grant
First Claim
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1. A sensor device for a motor vehicle, including a control and evaluation circuit and a sensor electrode coupled therewith,wherein the sensor electrode is designed as a conductor loop, which is coupled at two contacts to the control and evaluation circuit,wherein the control and evaluation circuit includes a measurement circuit, which is designed such that the sensor electrode monitors capacitance changes,wherein the control and evaluation circuit includes a test connection that can be activated intermittently, which tests the integrity of the sensor electrode and its coupling to the control and evaluation circuit, wherein the test connection has a triggering mechanism that can be activated in order to intermittently couple a test capacitor to the sensor electrode, such that the measurement circuit also detects the capacitance of the test capacitor in addition to the capacitance of the sensor electrode.

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