METHOD OF DETECTING OBSTRUCTIONS CAUSED BY ELECTRIC WINDOWS AND SIMILAR DEVICES USING CURRENT RIPPLE

摘要

The invention relates to a method of controlling a mobile element actuated by an electric motor which protects against pinching and crushing and to a program used for same. According to the invention, said mobile element is guided and actuated by a D.C electric motor with a multipolar permanent magnet. The inventive method is characterised in that it comprises the following steps: the consumption intensity of the electric motor is acquired; said intensity is sampled at a frequency that enables the intensity response of each inductance coil to be identified; the average intensity of the motor is calculated; the angular rotational speed of the motor is obtained using the ripple in the current curve thereof; a parameter Fr, which is representative of the force applied to said mobile element, is calculated using the average intensity and the angular speed; and the variation in parameter Fr over time is acquired and measured and any situation involving pinching or crushing is detected if said variation exceeds a pre-determined threshold for a pre-determined period of time.