Anti-pinch circuit, anti-pinch circuit device and anti-pinch circuit method for positioning ripple waves of vehicle window precisely and vehicle

Abstract

The invention relates to the field of vehicle electronic control, in particular to an anti-pinch circuit, an anti-pinch circuit device and an anti-pinch circuit method for positioning ripple waves ofa vehicle window precisely and a vehicle. The circuit comprises a driving current collecting module and a control module, wherein the driving current collecting module is used for collecting a drivingcurrent of a vehicle window motor; and the control module is used for acquiring the value of the driving current and the quantity of the ripple waves to judge the position of vehicle window glass, and the control module is configured to control a vehicle window motor to stop rotating when the position belongs to a preset stopping area and to control disconnection of the driving current collectingmodule and the vehicle window motor within a preset time after the vehicle window motor stops rotating. After the vehicle window motor stops, the control module controls disconnection of the drivingcurrent collecting module and the vehicle window motor, so that a relay is resilient to not affect the wave form the ripple wave current in the disconnection process, and therefore, the positioning precision and reliability of the ripple wave anti-pinch module are improved.

Description

technical field [0001] The present application relates to the field of electronic control of vehicles, in particular to a precisely positioned window ripple anti-trap circuit, device, method and vehicle. Background technique [0002] With the development of vehicles and the improvement of the intelligent level of people's lives, it has become a trend for car windows to have intelligent anti-pinch functions. Currently, vehicles with intelligent anti-pinch functions for windows in the market mainly use technologies including Hall anti-pinch and ripple There are two types of anti-pinch. [0003] The ripple anti-pinch module in the traditional vehicle ripple anti-pinch system is generally driven by a relay. Since the motor is an inductive load and the driving current of the window is relatively large, a large reverse electromotive force will be generated at the relay port when the relay is disconnected. , and then cause arcing, the relay cannot be disconnected immediately, and ...

AI Technical Summary

Problems solved by technology

[0003] The ripple anti-pinch module in the traditional vehicle ripple anti-pinch system is generally driven by a relay. Since the motor is an inductive load and the driving current of the window is relatively large, a large reverse electromotive force will be generated at the relay port when the relay is disconnected. , and then cause arcing, the relay cannot be disconnected immediately, and it will have three to four rebounds, that is, the relay will be stable in the disconnected state after three to four times of disconnection, closure and disconnection, resulting in It is difficult for the control system to distinguish the current fluctuation caused by the relay rebound from the current ripple generated by the motor commutation, resulting in serious distortion and deformation of the ripple obtained based on the drive current of the window motor, and the superimposed waveform can no longer be used as a window position judgment According to the basis, although the ripple anti-pinch module of some vehicles is compensated by software algorithm, but this part of the superimposed waveform is not avoided, and finally the positioning accuracy and reliability of the ripple anti-pinch module are lower than those of the Hall anti-pinch module.

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