Anti-clip control method for electric window of vehicle

Abstract

The invention relates to an ant-pinch controlling method for the electric window of the automobile, which is characterized in that a sampling resistance and a magnifying filter circuit are adopted to obtain the armature current signal of a motor, and a divider resistance or an amplifier is adopted to obtain the armature voltage signal of the motor; a singlechip utilizes A/D to sample and filter to obtain the digital value of the armature voltage U and the electric current I, then a rotation speed n can be obtained according to the functional relationship between the motor speed n and the armature voltage U and the electric current I; the rotor position can be obtained by calculating the integral of the rotation speed, and thereby the position q of the electric window glass can be obtained; on the other hand, the singlechip can judge if the motion of the electric window glass is obstructed according to the current I; Whether the electric window glass reaches the top or nips foreign matter can be distinguished according to the motion condition and the glass position q, then the electric window glass can be lifted, lowered or stopped by comprehensively analyzing the external instruction. The method provided by the invention has the advantages that the method is simple and practical; an anti-pinch device for the electric window can be designed and manufactured without a sensor.

Description

technical field [0001] The invention relates to a method for controlling an electric window of an automobile, in particular to an anti-pinch control method for an electric window of an automobile. Background technique [0002] The anti-pinch control method of automobile electric windows usually uses the Hall sensor to obtain the number of rotations of the DC motor, and indirectly feeds back the position of the electric window glass; judges whether the movement of the electric window glass is blocked according to the magnitude or change range of the motor armature current, and can also be used according to the Hall sensor. The pulse width fed back by the sensor can judge whether the movement of the electric window glass is blocked; the position of the glass is used to distinguish whether the movement is blocked to the top or to clamp foreign objects, so as to realize the anti-pinch control of the electric window of the car. The prior art also uses switches, photoelectric sens...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to overcome the deficiencies in the prior art that sensors need to be installed to control the electric windows of automobiles, so that the structure is complicated, the cost is high, and the production and debugging are difficult. It provides a novel anti-pinch control method for electric windows of automobiles. method, without installing sensors, it can detect the position of the electric window glass of the car and whether the movement is blocked, so as to control the rise, fall or stop of the electric window glass of the car

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