Ifm Electronic Gmbh

Huf Huelsbeck & Fuerst Gmbh & Co Kg

Huf Hülsbeck & Fürst Gmbh Co.kg

Heidrun Richter

Martin Witte

Bernd Steegmann

Joerg Schulz

Gianni Uselli

Gerhard Heilig

Jörg Schulz

A capacitive proximity switch for detecting the change in the capacitance relative to a setpoint capacitance by the approach or retreat of an object in the sensitive area of a proximity switch, especially for use in the door handle of a motor vehicle, provides reliable error detection and error suppression at a fundamentally high sensitivity of the capacitive proximity switch by utilizing an evaluation unit that evaluates a measured value of the change in capacitance over time and depending on the time behavior of the measured value activates changes the operating threshold from a first threshold (which can be caused by a false object coming into or out of the sensitive area of the proximity switch) to a higher second threshold which can be reached only at a relatively greater change in capacitance caused by a target object coming into or out of the sensitive area of the proximity switch.

Capacitive proximity switch

Growing community of inventors

Wertingen, Germany

Heidrun Richter