基于PLC的交通灯控制电路设 - 图文

Xxxx 学号： 0....... 本科毕业论文

基于PLC的交通灯控制电路设计

专业名称： 电子信息工程 年级班别： 2009级1班 姓 名： xxx 指导教师： xxx

2013年5月

河南师范大学新联学院本科毕业论文

目 录

摘要 ......................................................................... II 关键词 ....................................................................... II Abstract ..................................................................... III Keywords ................................................................... III 前言 .......................................................................... 1 1 PLC的发展背景及其原理概述 ................................................... 2

1.1 PLC概述 ............................................................. 2 1.2 梯形图工作原理 ...................................................... 2 1.3 梯形图编辑说明 ....................................................... 4 2 用PLC实现智能交通灯控制 .................................................... 6

2.1 控制系统的组成 ....................................................... 6 2.2硬件配置 ............................................................. 7 2.3交通灯的控制过程 ..................................................... 7 2.4 PLC的选型 ........................................................... 9 2.5 车流量的计量 ........................................................ 10 2.6 流程分析 ............................................................ 11 3 模块选择 ................................................................... 11

3.1扩展模块的选择 ...................................................... 11 3.2 EM222的端子连线图 .................................................. 12 3.3扩展模块与主机的连接形式 ............................................ 12 3.4 I/O分配 ............................................................ 12 结论 ......................................................................... 14 参考文献 ..................................................................... 15 致谢 ......................................................................... 16

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河南师范大学新联学院本科毕业论文

基于PLC的交通灯控制电路设计

摘要 交通信号灯是城市交通监管系统的重要组成部分，对于保证机动车辆的安全行驶，维持城市道路的顺畅起到了重要的作用，随着车辆的日益增多，交通问题将日趋严重。日常生活中人们都要经过无数次的十字路口，所以十字利口需要一套交通信号灯的模拟控制来管理人流和车辆疏通，一边防止发生交通事故目前绝大部分的交通灯时间都是设定好的，不管是车流高峰或低谷，红绿灯的时间是不变的，还有一些交通灯能根据简单划分的时间段来调整时间，但控制起来不是很灵活，这使得城市的车流量的调节不能达到最优。交通信号灯可采用PLC来实现交通灯来控制人流和车辆安全疏通，从而实现了十字路口交通信号灯的自动化控制，更易交通管理和控制。本设计介绍了PLC的意义，交通灯控制系统硬件结构图，设计思路和各个功能模块的实现细节。 关键词 PLC；硬件连接图；交通信号灯系统

II

河南师范大学新联学院本科毕业论文

PLC-based traffic light control circuit

Abstract The traffic lights are an important part of the urban traffic control system, play an important role to ensure safe driving of motor vehicles, maintenance of urban roads smooth, asleep increasing number of vehicles, traffic problems will become increasingly serious. Our daily lives and go through the crossroads of numerous cross liqueur set of traffic lights analog control to manage the flow of people and vehicles to clear the side to prevent car accidents, most of the traffic signal timing are predetermined, traffic peak or trough, the time of the traffic light is not to become, there are some traffic lights to adjust the time according to a simple division of time, but the control is not very flexible, which makes the city's traffic regulation can not achieve optimal . Traffic lights can be used PLC to achieve the traffic lights to control the flow of people and the safety of vehicles to clear in order to achieve automatic control of the crossroads traffic lights, more traffic management and control. This design introduces the significance of the PLC, traffic light control system hardware structure, design ideas and the various functional modules implementation deta. Keywords PLC; hardware connection diagram; traffic signal system

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