Low-cost car window anti-pinch control system and method

Abstract

The invention discloses a low-cost car window anti-pinch control system and method. The device comprises an MCU, a current ripple acquisition circuit and a current detection circuit. The current ripple acquisition circuit is responsible for extracting current ripple signals when a motor rotates. The current detection circuit is responsible for measuring the magnitude of current passing through a direct-current motor M. Because the current ripple acquisition circuit is responsible for extracting the current ripple signals when the motor rotates, an extra sensor does not need to be installed, only the general characteristics of the direct-current motor are used, and the periodic current ripple signals generated when the motor rotates are used for replacing a Hall sensor to achieve anti-pinchcontrol.

Description

technical field [0001] The invention belongs to the field of automotive electronics, and relates to a low-cost vehicle window anti-pinch control system and method. Background technique [0002] With the development of automobile windows from rocker arm type to electric type, it brings convenience to people but also has potential safety hazards. Therefore, it is of great significance to introduce the anti-trap module into the electric window control system. Most of the current mainstream anti-pinch control modules use photoelectric and Hall sensors to obtain the speed of the motor and the position information of the window to achieve anti-pinch control, but such anti-pinch modules that rely on sensors have high hardware costs, complex structures, and inconvenient installation. and other problems, it is difficult to apply on a large scale. In addition, the anti-pinch control system is easily disturbed by external environmental factors, such as the flatness of the road surface...

AI Technical Summary

Problems solved by technology

Most of the current mainstream anti-pinch control modules use photoelectric and Hall sensors to obtain the speed of the motor and the position information of the window to achieve anti-pinch control, but such anti-pinch modules that rely on sensors have high hardware costs, complex structures, and inconvenient installation. and other problems, it is difficult to apply on a large scale

In addition, the anti-pinch control system is easily disturbed by external environmental factors, such as the flatness of the road surface, the aging degree of the window rubber strip, the magnitude of the motor drive voltage, and the temperature, all of which will affect the reliability of the anti-pinch control system

If fixed parameters are used for simple anti-pinch calculation processing, it will lead to misjudgment of the window anti-pinch function under harsh external conditions, resulting in failure of the anti-pinch function, which may cause serious consequences

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