摘 要：随着世界范围内科技的进展，社会的进步，但也导致城市化进程的加快，越来越多的人也买得起车了，从而导致交通拥挤的现象时有发生。由此可以看出，简单的十字路口交通信号灯已经不能适应现代化进展的潮流，因此需要一个更加合理、有效的智能交通灯控制系统来缓解城市交通的压力。 在现代，利用单片机来实现交通信号灯的控制成为了我们调控交通的主流。运用单片机控制交通信号灯比较方便，而且性能高，易于控制。所以，我们有必要对这一课题进行一次系统的讨论学习。在本次毕业设计中，我的主要设计任务是在一个十字路口设计一个交通信号灯控制系统，并且利用单片机来对该系统进行合理的控制。 本系统由 AT89C51 单片机、交通信号灯状态控制电路、LED 数码管显示电路、按键电路组成。系统除了拥有基本交通信号灯状态控制功能外，还具有倒计时、时间设置等功能。关键词：单片机 交通信号灯AbstractWith the worldwide development of science and technology, the progress of the society, but also led the city to speed up, more and more people can afford to buy a car, causing traffic congestion phenomenon, can be seen, traffic lights at the crossroads of simple already can not adapt to the modern development trend, so we need a smart traffic the lamp is more reasonable, effective control system to alleviate the city traffic pressure.In modern times, to achieve control of traffic lights using SCM into the mainstream of our traffic regulation. The use of single-chip microcomputer to control the traffic signal lamp is convenient, high performance, easy to control. Therefore, we are necessary to study a system on this subject. In this graduation design, the main design task is to design a control system of traffic lights at a crossroads, and the use of single-chip microcomputer to the reasonable control of the system. This system consists of AT89C51 microcontroller, a key circuit, the state of the traffic lights control circuit, LED digital tube display circ...
