Ripple wave anti-clamping controller of car window and control method

Abstract

The invention provides a ripple wave anti-clamping controller of a car window, which is mounted in an electric hoisting car window circuit of an automobile. The anti-clamping controller utilizes a ripple wave quantity detection circuit to detect the position of a car window; if the position of the car window is in a pre-set anti-clamping range, motor current is sampled through an operational amplifying circuit to obtain a real-time value of the current; a data processing unit compares according to a standard value of a corresponding position which is stored by a storage device; if a difference value is more than an allowable tolerance value, an obstacle is considered to be met, an anti-clamping state is enabled; otherwise, if the position of the car window is not in the regulated anti-clamping range, the anti-clamping state is not enabled. The anti-clamping controller measures the position of the car window based on a current ripple wave and the method does not need a Hall sensor, the cost is lower than that of a scheme needing the Hall sensor and the installation of a motor is simple. The anti-clamping controller disclosed by the invention judges whether a clamping phenomenon happens through a method of measuring an operation current value of the motor of the car window and the anti-clamping effect is reliable.

Description

technical field [0001] The invention belongs to the technical field of electronic control, and in particular relates to an anti-pinch controller of an electric lift window of an automobile. Background technique [0002] Due to the potential safety hazards of electric windows, especially after many accidents were reported, the anti-pinch protection of electric windows was proposed. Based on safety considerations, the car technical standards of many countries have made some relevant regulations on anti-pinch protection. Vehicles equipped with one-button automatic window lift function of electric windows must be equipped with anti-pinch protection devices. The so-called anti-pinch protection of electric windows means that once an obstacle is detected during the automatic upward movement of the window, the window will automatically stop moving upward to prevent damage to the obstacle; and move downward to release the obstacle. Although some anti-pinch methods have been proposed...

AI Technical Summary

Problems solved by technology

Although some anti-pinch methods have been proposed at home and abroad, these methods are all based on the anti-pinch method of the Hall sensor, and the Hall sensor undoubtedly increases the cost.

Moreover, the Hall sensor needs to be installed on the motor shaft, which is complicated to install

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