毕业论文-基于AT89S52单片机的十字路口智能交通灯的设计.doc

基于AT89S52单片机的十字路口智能交通灯的设计 摘 要 随着社会主义的建设，城市的规模在不断扩大，城市的交通也在不断的提高和改进，交通的顺畅已经成为制约社会主义建设的一个重要因素。目前，伴随着机动车辆的不断增加，尤其是十字路口的交通建设颇为关键，严重的影响到城市交通安全。社会主义建设以来，有许许多多的设计工作者投身于十字路口交通建设的研究之中，创造和设计出了很多新型的方案，把我国交通建设推向了更高的发展阶段。当前，十字路口都采用了信号灯来控制车辆和人的通行，不仅便于维护管理，而且有较强的自动化。大量的信号灯电路正向着数字化、小功率、多样化、方便人、车、路三者关系的协调，多值化方向发展随着社会经济的发展，城市交通问题越来越引起人们的关注。十字路口车辆穿梭，行人熙攘，车行车道，人行人道，有条不紊。那么靠什么来实现这井然秩序呢？靠的就是交通信号灯的自动指挥系统。交通信号灯控制方式很多。本系统采用单片机来设计交通灯控制器，实现了能根据实际车流量通过芯片的P1口设置红、绿灯燃亮时间的功能；红绿灯循环点亮，倒计时剩5秒时黄灯闪烁警示本系统实用性强、操作简单、扩展功能强。 Abstract With the construction of socialism, the city scale in expanding constantly, urban traffic is also in constant improvement and improvement, traffic flow restriction of socialist construction has become one of the important factors. At present, with the increasing motor-driven car, especially intersection traffic construction ? is vital, serious effect to urban traffic safety. Socialist construction, since there are many design professionals involved in crossing traffic construction investigation, create and devised many new scheme, put in traffic construction to the higher stages of development. Current, intersection are adopted to control vehicle lights and traffic, not only facilitates maintenance management, and have strong automation. A lot of signal circuit is toward digital, small power, diversification, convenient people, vehicles and road relationship coordination, multi-valued change direction to develop with the development of social economy, urban transportation problem and has attracted the attention of people. It appears that traffic to effectively control for relieves traffic flow, improve traffic capacity, reduce the number of traffic accidents have obvious effect. Crossroads transports, pedestrian bustling, garage lanes and pedestrian humanitarian, in an orderly way. Then rely on what to achieve this in order? Lean is traffic lights automatic command system. Traffic lights control many ways. The system USES the monolithic integrated circuit ATAT89S52 to desig