Abstract
In order to effectively solve the problem of installation cost of automobile electric windows and the safety of passengers, the window regulator of the car must have an intelligent control function. For example, most automobile windows now have an anti-pinch function. In this paper, the model of DC brushed motor is analyzed, an intelligent control scheme for automotive power windows is proposed, and the relationship between current ripple and window travel, motor current and external resistance are verified. In the hardware design, S9S12G128 is the main control chip, and the motor current acquisition method is designed. In the software design, intelligent control methods such as current integration method, adaptive and self-learning algorithm and intelligent speed regulation method are proposed to realize functions such as automatic window opening and closing, intelligent anti-pinch and intelligent speed regulation. After many experiments, the results prove the feasibility of the above methods and the stability of the system.
Highlights
With the development of the electronics industry and its close integration with the automotive industry, automotive electronic control technology has gradually been widely used in automobiles [1]
The 74/ 60/EEC regulations in Europe and the FMVSS118 regulations in the United States clearly stipulate that anti-pinch power windows are the standard configuration of automobiles [5]: passenger cars must have smart anti-pinch functions [6]
When the system voltage is 13.5 V and other conditions remain unchanged, the motor current can increase to 190 mV at the moment of starting the motor, and the motor starting time is about 80 ms
Summary
With the development of the electronics industry and its close integration with the automotive industry, automotive electronic control technology has gradually been widely used in automobiles [1]. The 74/ 60/EEC regulations in Europe and the FMVSS118 regulations in the United States clearly stipulate that anti-pinch power windows are the standard configuration of automobiles [5]: passenger cars must have smart anti-pinch functions [6]. In foreign countries, American ATMEL semiconductor company proposed a window glass antipinch control algorithm based on motor current and motor speed change rate [11]. The controller can intelligently detect and update the motor current in real time, use the changed current to detect anti-pinch, and use the ac component (ripple) contained in the current to calculate the operating position of the window. Contributions: First, proposed an intelligent anti-pinch method based on motor current detection.
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