Actuating system compares differential of movable part to revolution rate against time with differential value for measurement point on path of motion of movable part to detect obstruction

摘要

The system has a control system that monitors the movement of the part to be moved. A sensor detects the revolution rate of the movable part at a reference point. The control system forms the differential of the revolution rate against time which is compared with a differential value corresponding to a measurement point on the path of motion of the movable part to detect an obstruction. The system has a base part with a drive device that interacts with a part to be moved (3), whereby a control system (29) monitors the movement of the part to be moved and detects an obstruction if a parameter representing the movement deviates from a stored parameter above a threshold. A sensor (15) detects the revolution rate of the movable part at a reference point. The control system forms the differential of the revolution rate against time which is compared (31) with a differential value corresponding to a measurement point on the path of motion of the movable part to detect an obstruction.