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随着科技的发展,人们对生活质量的要求也越来越高,生活的很多领域都开始实现自动化、智能化,公交车自动门系统就是其中之一。本文设计了基于单片机的公交车自动门,主要应用8051作为控制主体,直流电机、PWM调速、转速测量为核心,直流电机采用双极性H桥驱动,磁开关等相结合。通过程序对直流伺服电机的正转、反转进行控制,从而对门进行开、关的控制;通过检测电机转速,测得转速为零时向单片机发出堵转信号,从而自动开门,并发出事故报警提醒驾驶员,形成了防挤压功能,充分发挥了单片机的性能。加入关门后发出报警声,提示乘客汽车即将启动,提高了乘客安全进出的保证,实现了公交车门安全的自动控制。
With the development of science and technology, people are demanding higher and higher quality of life. Many areas of life are starting to realize automation and intelligence. The automatic bus system for buses is one of them. This text has designed the automatic door of the bus based on the one-chip computer, the main application 8051 serves as the main body of the control, DC motor, PWM speed regulation, rotational speed measure as the core, DC motor adopts bipolar H bridge drive, magnetic switch, etc. Through the program on the DC servo motor forward and reverse control to open and close the door control; by detecting the motor speed, measured when the speed is zero to the microcontroller sends a locked signal, and thus automatically open the door and issue an alarm Remind the driver, formed a anti-extrusion function, give full play to the performance of the microcontroller. After the door was closed, an alarm sound was issued prompting the passenger car to start soon, thereby improving the passenger’s safety in and out of the airport and realizing the automatic control of bus door safety.