Verfahren und Anordnung zur Detektion des Widerstands eines elektrischen Fahrzeugfensterhebers

摘要

A method and system for detecting the presence of an object caught between an automotive window and its respective frame includes an electric drive motor for opening and closing the automotive window. The electric drive motor receives power from a power supply via a primary brush assembly coupled to a power line. A piezoelectric sensor is mounted on the drive motor for sensing a resistive torque applied to the regulator and generating a signal having a'value indicative of the resistive torque. The signal is then transmitted to a control circuit for determining whether or not an object is caught between the window and a frame based on the signal. The signal may be transmitted to the control circuit either by the primary brush assembly via the power line or by a secondary brush assembly coupled directly to the control circuit.