Patent ID: 6657409
Filing Date: 2003-12-02
Classification: E05F,E05Y,E06B,G05B

Abstract:
A control system for a door or gate which is movable between an open position and a closed position by an automated operator, comprising:(a) a door travel organiser which divides the door or gate travel into a plurality of segments and each segment into a plurality of sectors; (b) a sensor to sense, at each sector, the resistance of the door or gate against opening and closing whilst moving between the open position and the, closed position over a predetermined number of open-close cycles, and to generate at least one signal representative of that resistance in each segment over the open-close cycles; (c) a recorder connected to the sensor to receive each representative signal and to store such a signal; (d) a comparator to compare each signal with a resistance trip point set for each segment and generate a resistance profile for the door or gate over an open-close cycle of the door or gate; (e) a calculator to calculate the resistance trip point for the door or gate for each segment based upon the highest resistance encountered in any sector of that segment; and (f) a controller to receive each trip point and set each trip point as a threshold for each segment such that if resistance of the door or gate sensed by the sensor in any sector exceeds that threshold for that interval, the movement of the door or gate is interrupted.