Vehicle window drive clamping-proof control system

Abstract

The present invention is squeeze preventing automobile window driving system and control method, and relates to squeeze preventing automobile window driving technology. The system includes one microprocessor circuit, one intelligent feedback power chip, one multiway switch detection interface circuit, one window top touch switch, one test switch, one window bottom touch switch, one window ascent switch and one window descent switch connected together. The control method includes the following steps: for the microprocessor circuit to detect braking current value for N times and normal resistance current value for N times and to store the calculated threshold value in a flash memory; to compare with the reference current value in the flash memory, and to rotate the motor inversely to execute the squeeze preventing function if the calculated threshold value is greater. The present invention has high antipinching precision and capacity of automatically updating threshold value with operation of the automobile window.

Description

technical field [0001] The invention relates to the technical field of driving anti-trap control of automobile windows. Background technique [0002] Existing car window drive anti-pinch devices are mainly divided into: infrared sensing type and current feedback type. Too low, to obtain the reference current threshold value Imax requires a lot of testing work, and after each window is installed, the resistance it receives during the rotation process is different, the fixed reference current threshold value Imax will inevitably produce errors for certain window environments with high resistance, and misjudgments will cause the windows to fail to close. With the use of the window, the aging of the device, and the continuous change of the resistance of the window motor during the rotation process, the resistance becomes larger or smaller, and the fixed reference current threshold value Imax will change with the use of the system. become inaccurate and ultimately unusable. C...

AI Technical Summary

Problems solved by technology

[0003] The present invention aims to overcome the fact that the existing infrared sensing type automobile window drive anti-pinch device cannot be popularized and applied because of its high cost and the existence of the current feedback type automobile window drive anti-pinch device requires a large number of operations to obtain the reference current threshold value Imax. The shortcomings of the test work; solve the problem that with the use of the window, the aging of the device, and the continuous change of the resistance of the window motor during the rotation process, the resistance becomes larger or smaller, and a fixed reference current threshold occurs Imax becomes inaccurate as the system is used, eventually leading to unusable issues

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