Patent ID: 6388406
Filing Date: 2002-05-14
Classification: B60J,E05F,E05Y,G01S

Abstract:
A system for detecting an object caught in the path of a vehicle power window system having a window that opens and closes via a motor commanded by a control circuit, the system comprising:an acoustic sensor for sensing acoustic signals associated with the window as the window closes; a control circuit having control logic for comparing the sensed acoustic signal with a predetermined noise threshold and detecting an object caught in the path of the vehicle power window system based on the comparison; and wherein the acoustic sensor is further operative to sense a current acoustic signal as the window closes during a current window closing operation indicative of the sound associated with the window closing, and wherein the control circuit, in comparing, is further operative to compare the sensed current acoustic signal with a previously sensed acoustic signal during the current window closing operation and determine if the sensed current acoustic signal differs from the previously sensed acoustic signal.