毕业设计（论文）-于8051单片机的交通信号控制系统.doc

攀枝花学院本科毕业设计（论文）基于8051单片机的交通信号控制系统设计学生姓名： 学生学号： 院（系）： 电气信息工程学院 年级专业： 09级电气工程与自动化 指导教师： 副教授 助理指导教师： 二〇一三年五月攀枝花学院本科毕业设计（论文） STYLEREF 标题 1 \* MERGEFORMAT 致 谢 PAGE 38摘 要随着技术的发展，单片机技术越来越成熟，由于单片机有很高的可靠性和性价比，其在工业上和生活上的应用已经非常广泛。在实际的生产生活中，将单片机做为一个核心的控制部件来应用，能够降低成本，提高生产的自动化水平。本设计中以MSC-51系列单片机AT89C51单片机作为信号系统控制的核心，通过单片机的引脚来控制交通信号红、黄、绿灯和人行道上的红绿灯，并进行计时。单片机的I/O口P0、P1控制交通信号灯的亮、暗、闪烁。P2口经过锁存器74HC595控制共阳极数码管进行计时输出。在设计中将系统的运行方式设为，东西直行、南北直行、东西左右转、南北左右转四个运行状态加四个过度状态和一个紧急运行状态，共九个状态。在直行运行时，对运行时间进行倒数计时，显示在数码管上。当发生紧急状况时，系统可进入紧急运行状态，红灯全亮，其他灯全暗，紧急状态由外部中断0控制。关键词 交通信号系统，控制，单片机。 ABSTRACTWith the development of technology, computer technology is more and more mature, the single-chip microcomputer has high reliability and cost-effective, its application in industry and the life of the already very extensive. In the practical production and life, the control unit MCU as a core to the application, can reduce the cost, improve the automation level of production.The design of MSC-51 series microcontroller AT89C51 as the core signal control system, through the microcontroller pin to control the traffic signal red, yellow, green and red lights on the sidewalk, and timing. I\/O port P0, P1 control traffic lights SCM bright, dark, scintillation. P2 port after the latch 74HC595 control common anode led timing output.In the operation of the system design is, things straight, straight north-south line, things turn around, turn left and right four north-south running state and four transition state and a state of emergency operation, a total of nine state. In the straight run time, countdown to the running time, digital tube display. When an emergency occurs, the system can enter the emergency state, the whole bright red light, other lights are dark, a state of emergency by external interrupt 0 control.Key words Traffic signal sys