毕 业 论 文(设 计)

题 目： 智能交通灯控制系统

(Title)： Intelligent traffic light control system

智能交通灯控制系统

摘要

本设计就是以单片机为架构的智能交通灯系统。

关键词：AT89S52；交通灯； LED显示

Intelligen traffic light control system

Abstract

This design is based on SCM for intelligent traffic light system architecture. This system consists of SCM system, LED display, traffic lights demonstration system. The system comprises a straight line, turn left, turn right, and the basic traffic lights function. In addition to the basic traffic lights function, also has the light time countdown, time setting, emergency handling, sub-period adjustment of signal and manual control functions according to the specific circumstances.

At present, the traffic lights fixed period, resulting in the rush hour of trunk road to wait for a long time. Increase the peak pattern design, enter the peak period of time, by regulating the flashing time relieve the pressure large flow of car. At the same time also increased the traffic light system sidewalk blind prompt function, acute emergency vehicles through the function, can effectively prevent the commuting traffic and vehicles, staff retention. Compared with ordinary traffic light control system, the system improves the efficiency of traffic light control, ensure the orderly traffic.

Key words: AT89S52；TRAFFIC LIGHT；LED DISPLAY

目录

一 绪论1

1.1城市交通灯的作用1

1.2交通系统发展的现状2

1.3交通系统存在的问题3

1.4交通系统问题解决的途径4

1.5交通系统研究的主要内容5

二 单片机控制交通系统总体设计6

2.1单片机交通控制系统通行方案设计6

2.2单片机交通控制系统的功能要求7

2.3单片机交通控制系统的显示界面方案10

2.4单片机交通控制系统的原理分析15

三 系统硬件电路20

3.1 AT89C52单片机20

3.2译码器74LS13822

3.3总线收发器74LS24523

3.4八段LED数码管24

3.5其他器件26

四 系统软件程序的设计28

4.1程序主体设计流程28

4.2延迟子程序模块28

4.3定时中断程序模块28

4.4紧停中断服务子程序29

4.5主程序运行程序32

五 系统局部仿真36

六 总结与展望40

参考文献42

致谢43

附录A44

附录B45

附录C46

附录D47

一、绪论

1.1城市交通的作用

城市是人类从事各类社会、政治、经济和文化的活动中心，在社会发展中起了重要的作用。汽车是这一时代文明的产物，在给人们带来巨大便利的同时，也使人们面临交通拥挤的困惑和道路交通安全事故的烦恼。在我国