交通灯模拟控制系统 毕业设计

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1、广东交通职业技术学院毕业设计题目名称：交通灯模拟控制系统姓名：专业：电气自动化技术班级学号：指导教师：2013年12月03日39摘要　　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。交通事业蓬勃发展，交通流量年年增长，大、中、小城市的汽车、摩托车等各种车辆与日俱增，道路交通繁忙，经常有严重堵车现象，特别是在交叉口，机动车、非机动车、行人来往非常混乱，人、车、路三者关系的协调，已成为交通管理部门需要解决的重要问题之一。城市交通控制系统是用于城市交通数据监测、交通信号灯控制与交通疏导的计算机综合管理系统，它是现代城市交通监

2、控指挥系统中最重要的组成部分。所以，如何采用合适的控制方法，最大限度利用好耗费巨资修建的城市高速道路，缓解主干道与匝道、城区同周边地区的交通拥堵状况，越来越成为交通运输管理和城市规划部门亟待解决的主要问题。为了在叉口的各条干道实现合理的科学分流，在岔口醒目处设置交通灯显的尤为必要。在大、中城市，十字道口的红绿灯是交通法规的无声命令，是司机和行人的行为准则。十字道口的交通红绿灯控制是保证交通安全和道路畅通的关键。交通灯在安全行车过程中起着十分重要的作用，现在交通灯一般设在十字路口，在醒目位置用红、绿、黄三种颜色的指示灯，加上一个

3、倒计时的显示计时器来控制行车，对于一般情况下的安全行车、车辆分流发挥着作用，根据行车过程中出现的实际情况，也可全面有效地利用交通灯指示交通情况。本次毕业设计采用单片机来控制，红黄绿三色发光二极管定时发亮，数码管显示各灯亮的时间。通过硬件的设计，51单片机，138译码器，8255芯片的功能使用，并用软件编程来灵活有效的实现功能，方便采取改进措施。本次设计是具有物美价廉、功能强、运行稳定等特点。　　关键字：交通信号灯、单片机、自动控制39目录前言···········································

4、························1第一章设计内容及要求·················································21.1设计内容与要求···················································51.2方案介绍·························································6第二章系统组成及工作原理··········································

5、···22.189C52的工作原理················································52.28255的工作原理··················································52.37279的读写方法··················································42.4系统组成及工作原理···············································4第三章硬件电路方案设计···

6、············································2393.1方案选择························································073.2硬件电路设计····················································173.3电路参数分析····················································27第四章软件设计·····················

7、··································14.1程序设计原理····················································284.2程序流程图······················································28第五章实验、调试和测试结果与分析······································25.1实验、调试·········································

8、··············385.2测试结果与分析··················································38总结··························································