1、第 1 页 共 53 页 摘摘 要要 当前，在世界范围内，一个以微电子技术，计算机和通信技术为先导的，以信息技 术和信息产业为中心的信息革命方兴未艾。 而计算机技术怎样与实际应用更有效的结合 并有效的发挥其作用是科学界最热门的话题，也是当今计算机应用中空前活跃的领域。 本文研究的是以 AT89C51 单片机为控制器的智能交通灯控制系统， 该系统通过红外接收 器接收信号实现特种车辆（119、120 等）自动放行；通过车辆检测电路采集路况信号， 经单片机处理后，分配各车道的绿灯时间，实现车流动态调节，并由 74HC244 驱动 LED 数码管显示通行倒计时；左拐、右拐、直行及行人的通行指示灯采用双
2、色高亮度发光二 极管，设计中还添加了声音提示电路，方便盲人过人行道。本设计是以软件和硬件相结 合的方式来实现，文中给出了具体的硬件电路图和软件流程图及程序源码。 关关 键键 词词：智能交通灯，AT89C51，车辆检测，LED 第 2 页 共 53 页 Abstract At present, in the world scope, a microelectronics technology, computer and communication technology as the forerunner, information technology and information indust
3、ry as the center of the information revolution is in the ascendant. And how computer technology and practical application is the combination of more effective and effective play its role is the scientific community the most popular topic, also is the computer application in unprecedented active fiel
4、d.This study is based on AT89C51 as the controller of the intelligent traffic light control system. The system can achieve the special viehicles (119,120ect) automatically release through the infared receiver to receive signal. Collecting traffic information by the vehicle detection circuit, treated by the MCU, assigning green time of each lane to achieve dynamic adjustment of traffic by the 74HC244 driving the passage of LED digital display the countdown. The traffic light of turn left, turn
