基于单片机的交通灯设计与教程方案.doc

基于51单片机的交通灯设计与研究 专业：08自动化 姓名：吴吉波 指导教师：刘文博 摘 要 系统以AT89C51单片机最小系统做为核心控制器，其他部分分别由数码管显示模块、LED发光二极管显示模块、数码管驱动模块、LED发光二极 管驱动模块、独立按键阵列模块、声光报警模块、稳压电源模块和程序下载模块等组成。系统设计中充分利用了单片机的I/O口，并用了3个74HC573芯片作为单片机和数码管、LED发光二极管之间的缓冲器和驱动器，使数码管和LED发光二极管正常显示，并且使单片机的并口总电流不会超过规定的限制电流总和。 系统对车辆放行和车辆禁行时间用数码管进行倒计时显示，不仅实现了基本的交通信号灯切换功能，还实现了紧急情况处理、红绿灯加时设置、夜间模式选择、东西方向和南北方向车辆闯红灯报警、东西方向和南北方向人行道临时通行等功能，从一定程度上解决了人行道临时通行、车流量大需要加时、车辆闯红灯和紧急情况处理等问题，同时，系统结构简单、可靠性高、成本低、实时强、安装与维护方便，提高了交通灯控制系统的综合应用能力，具有广泛的应用前景。 关键字 单片机，LED发光二极管，数码管 Abstract System to the minimum system of at89c51 microcontroller as the core controller, other parts of the digital display module、led light-emitting diode display module、 nixie tube driver module、independent key array module、Sound and light alarm module、regulated power supply module and download module and so on. the system design takes full advantage of the microcontroller i/o port, and three 74hc573 chip as a microcontroller and digital tube, buffer between the led light emitting diode and drive, digital control and led light-emitting diode display properly, and the sum of the single chip parallel port total current does not exceed the prescribed limit the current. System on the vehicle clearance and vehicle ban time digital tube countdown display, not only to achieve the basic switching function of the traffic lights, emergency circumstances, set when the traffic lights plus、night mode selection east-west direction and north-south direction of the vehicle ran a red light alarm, east-west direction and north-south direction of the sidewalk, temporary access and other functions, sidewalk temporary passage to a certain extent to solve the、when the traffic is heavy plus、vehicles running red lights and emergency treatment, meanwhile, the system is simple, high reliability, low cost, real-time strong, installation and easy maintenance, improve the ability of traffic light control system, has broad applica