A wiper control system

Abstract

The invention provides a windscreen wiper control system which comprises a controller, a windscreen wiper pause switch, a windscreen wiper low-speed switch, a windscreen wiper high-speed switch, a power supply, a windscreen wiper high-speed relay, a windscreen wiper low-speed intermittent relay, a windscreen wiper motor assembly and a windscreen wiper control mechanism. According to the windscreen wiper control system, after the high-speed switch, the low-speed switch, a spraying switch and the pause switch are all switched off, the controller enables a windscreen wiper to continue wiping for two cycles by counting rising edges and fall edges of return signal input pins, and after two cycles of wiping are completed, the windscreen wiper wiping-stop logic is controlled. Aiming at two forms including the low-effective form and the high-effective form of the pins, control logic under different effective forms is provided according to the different effective forms of the return signal input pins of the controller. By capturing trigger edges of windscreen wiper return signals, it is guaranteed that the number of times of wiping-stop is consistent with the number of times of wiping of the windscreen wiper, the windscreen wiper return position can be accurately controlled, and the windscreen wiper control system has good universality for windscreen wiper motors.

Description

technical field [0001] The invention relates to the field of automobile wipers, in particular to a wiper control system. Background technique [0002] The wiper system is one of the important safety component systems of automobiles. Its function is to remove rain, ice, snow, dirt and other sundries on the windshield of the automobile to maintain the driver's vision and ensure driving safety. At present, the mainstream control method of wiper motor components is mainly to control the wiper frequency, and lacks the optimal control of wiper stop, which leads to inconsistent wiper stop times and inconsistent stop positions when each switch signal is invalid. , When the wiper returns from the intermittent gear to the zero gear, the wiper blade will jump up about 10-20CM and stop when it returns to the lowest position. [0003] When the wiper system is working, after the intermittent switch and the sprinkler switch are disconnected, the low-speed intermittent relay of the wiper i...

AI Technical Summary

Problems solved by technology

But in fact, different wiper motor components have different mechanical characteristics, the friction between the wiper arm and the glass is uncontrollable, different relays have different disconnection and reset times, the motor parameters are inaccurate, or the vehicle power supply voltage is unstable. Delay time control, it is difficult to accurately ensure the stop position of the wiper

For the user, during the driving process, due to the above-mentioned many uncontrollable factors, the phenomenon of the wiper stop jittering or the stop position of the wiper is not uniform, which will easily cause confusion and distraction to the driver, and affect the safety and driving quality of the driving process. comfort

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