(毕业论文 页数:31字数:9861)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。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控指挥系统中最重要的组成部分。
由于城市机动车量的不断增加，许多大城市如北京、上海、南京等出现了交通超负荷运行的情况,车辆的增加反映出了国家的整体进步，但是也给人民带来了其他的一些负面的影响。近几年机动车辆数字还在急剧增加，道路超负荷承载，致使交通事故逐年增加，根据统计每年因交通事故死亡的人数占所有事故死亡总人数的80%，而且这个比例还在不断的增加。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。
我们设计的交通控制系统具有自动化程度高、可靠性好、功能完备、便于升级、独立性强的优点。改进了以前的交通指示灯的那种信号单一，处理应急事故的能力差的缺点，并加入了数字提示功能，使得司机和行人可以安全行驶和穿越马路。为此，笔者进行了深入的研究，以下就道路交通灯控制系统的电路原理、设计计算和实验调试等问题来进行具体分析讨论。
关键字 交通信号灯,自动控制,国际化
Abstract
Along with the social economy development, the municipal transportation question more and more arouses people's interest. The human, the vehicle, the road three relations coordinations, have become one of important questions which the traffic control department needs to solve. The municipal transportation control system uses in the computer synthesis management system management system which the municipal transportation data monitor, the street-traffic control lights control and the transportation unblock, it is in the modern municipal transportation monitoring command system the most important constituent.
As a result of the city vehicle quantity unceasing increase, many big city like Beijing, Shanghai, Nanjing and so on had the transportation excess load movement situation, the vehicles increase reflection went abroad family's whole progress, but has also brought other some negative influences to the people. In recent years the motor vehicle numeral also in the sharp growth, the path excess load load bearing, causes the traffic accident to increase year by year, because the traffic accident death population accounts for all accident death total number of people every year according to the statistics 80%, moreover this proportion also in unceasing increase. Therefore, how uses the appropriate control method, maximum limit uses the good consumption large amount of money construction the urban road, alleviates the host yang or male principle and the circular route, the city supports with the peripheral locality transportation stops up the condition, more and more becomes the main question which the transportation management and the urban planning department urgently await to be solved.
We design the transportation control system has the automaticity high, the reliability good, the function complete, is advantageous for the promotion, the independent strong merit. Improved beforehand transportation indicating lamp that kind of signal to be unitary, the processing emergency accident ability difference shortcoming, and has joined the digital prompt function, caused the driver and the pedestrian may go safely and pass through the street. Therefore, the author has conducted the thorough research, the following on the path traffic light control system circuitry, the design calculation and tests questions and so on debugging to carry on the concrete analysis to ask for
KEY WORDS Traffic signal lamp , automaticallies control , internationalization
目录:
第1章 系统说明
第2章 系统介绍及设计原理
第3章 单元电路的设计
第4章 电路的安装与调试
第5章 故障的分析与电路的改进
第6章 毕业设计心得体会
第7章 附 录
1.1 系统介绍
本次数字电路毕业设计内容是设计交通灯控制器。该系统的基本功能为：在东西南北方向行驶的车辆通过十字路口，在十字路中正中，每条道路各有一组红，黄，绿灯和倒计时显示器，用以指挥车辆和行人有序的通行。其中，红灯亮表示该道路禁止通行；黄灯亮表示停车；绿灯亮表示可以通行；倒计时显示器是用来显示允许通行或禁止通行的时间。交通灯控制器就是用于自动控制十字路口的交通灯和计时器，指挥各种车辆和行人的安全通行。其中绿灯为G,黄灯为Y,红灯为R, 控制器的系统框图如下图(1)所示.
（1）
1.2 工作流程：.
满足下图(2)的顺序流程
图中设南北方向分别为NSR NSY NSG东西方向的红,黄,绿灯分别为EWR,EWY,EWG.,他们的工作方式,有些必须是并行进行的,即南北方向绿灯亮,东西方向红等亮;南北方向黄灯亮,东西方向红灯亮;南北方向红灯亮,东西方向绿灯亮;南北方向红灯亮,东西方向黄灯亮.
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