Patent ID: 6678601
Filing Date: 2004-01-13
Classification: E05F,E05Y,G05B,H02H

Abstract:
A powered movable panel control apparatus for a panel movable between first and second positions by an electric motor having an armature comprising:means for detecting deceleration of the motor armature; timer means, responsive to the deceleration detecting means, for generating consecutive time periods for rotation of the armature over a predetermined angular extent during at least a portion of one complete revolution of the armature; means, responsive to the timer means, for calculating an average time period over the predetermined number of time periods; means, responsive to the average time period, for calculating the deceleration of the motor armature between two time spaced points on the armature rotation; means for comparing the deceleration with a threshold defining normal motor decelerations resulting from motor armature load variations; means responsive to a comparison exceeding armature load threshold for classifying the deceleration as a relative deceleration with respect to the threshold; means for assigning a weighted value based on the relative deceleration with respect to the threshold; means for accumulating successive weighted values as a total cumulative weighted value; means for comparing the total cumulative value to a defined obstacle detection weighted value; means, responsive to the comparing means, for generating a panel reverse direction signal when the total cumulative weighted value exceeds the defined obstacle detection weighted value; means for detecting rough road conditions; and means, responsive to the rough road condition detection means, for adjusting the threshold when rough road conditions are detected.