Patent ID: 8341885

Claim:
A system for controlling a door, enabling driving from an initial control position, P i of its travel in a first direction at a speed v 1 as far as a final control position, P f , said safety function control system comprising motor, control and sensing means, and a safety function comprising means for performing the following steps in the event of impact with an obstacle obstructing the path of said door in the first direction involving the control having a program that when executed performs: (a) detection of the impact, stoppage of the motor, and storage of an impact position, P impact , followed by (b) reversal of the travel of the door by driving it in a second direction, opposite to the first direction, at a speed v 2 as far as a waiting position, P waiting , predetermined so as to leave sufficient space for removing the obstacle; (c) after a waiting time, Δt waiting , in the waiting position, P waiting , driving of the door in the first direction at the speed v 1 as far as a predetermined position P 3 situated upstream of before the impact position P impact , at which point the speed of driving the first direction is reduced to a value v 3 , with 0<v 3 <v 1 ; (d) if the door driven in the first direction at a reduced speed of v 3 no longer detects an obstacle at the position P impact , increasing the speed of driving in the first direction to the value v 1 until the door reaches its final control position P f , (e) if on the other hand the door driven in the first direction at reduced speed v 3 once again detects the obstacle at the same position P impact , the cycle defined by steps (a) to (c) is repeated and step (d) is executed if the door no longer detects an obstacle at the position P impact , (f) if after a predetermined number N of repetitions of said cycle the obstacle is still detected, driving of the door in the second direction at speed v 2 and stopping of the door at a predetermined stop position P stop , until manual reactivation of the control system.