湖南科技工业职业技术学院
毕业设计论文
设计课题： 十字路口交通灯PLC控制设计 院 （系）： 电气信息工程系 班 级： 姓 名： 学 号： 专 业： 联系电话： E-mail： 指导老师： 联系电话： E-mail：
plc交通灯系统设计
摘 要
针对近年来城市交通的拥挤现象,特别是驾驶员违章严重、交通事故频发、车辆尾气污染等问题,介绍了集计算机、信息、电子及通讯等众多高新技术手段于一体的智能交通指挥中心控制系统.该系统的安装及使用,大大缓解了城市道路堵塞现象、提高了道路的通行能力.减少了驾驶员违章的次数,抑制了交通事故的发生,同时对减轻车辆尾气排放,从而降低环境污染都起到了不可低估的作用.
本文分析了现代城市交通控制与管理问题的现状，结合城乡交通的实际情况阐述了交通灯控制系统的工作原理，给出了一种简单实用的城市交通灯控制系统的硬件电路设计方法。
关键词 ：PLC、控制、交通灯、传感器
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plc交通灯系统设计
Abstract
In recent years the urban traffic congestion phenomenon, especially the drivers violate the traffic accident frequency, serious, vehicle exhaust pollution, this paper introduces set computer, information, electronic and communication and many other new technologies in the integration of intelligent transportation command center control system. The system's installation and use, greatly ease the urban road congestion phenomenon, improve the road capacity. Reduce the number of illegal drivers, restrain the traffic accident, to reduce emissions from vehicles at the same time, and to reduce the pollution of the environment play a role of cannot be underestimated.
This paper analyzes the modern urban traffic control and management problems, based on the status of the urban and rural traffic to the actual situation of expounds the control system of the traffic lights work principle, this paper presents a simple and practical urban traffic control system hardware circuit design method.
Keywords: PLC, control, traffic lights, sensor
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plc交通灯系统设计
目 录
摘 要 ............................................................................................................................ - 2 - 目 录 .............................................................................................................................. - 4 - 第1章 前言 ................................................................................................................... - 6 -
1.1题的背景和意义 ................................................................................................. - 6 - 1.2课题的现状、发展趋势和已解决的问题 .............................................................. - 6 - 1.3 PLC的概述 ........................................................................................................ - 8 -
1.3.1 PLC的产生及发展 ................................................................................... - 8 - 1.3.2 PLC的结构 ............................................................................................. - 9 - 1.3.3 plc的定义 ............................................................................................. - 9 - 1.3.4 Plc的工作原理 .....................................................................................- 10 - 1.3.5 PLC的运用 ............................................................................................- 10 - 1.3.6 PLC的发展趋势 .....................................................................................- 11 - 1.4 CPU模块...........................................................................................................- 12 -
1.4.1 I/O模块 ...................................................................................................- 13 - 1.4.2 编程器...................................................................................................- 13 - 1.4.3 电源 ......................................................................................................- 13 - 1.4.4 PLC的通信联网 .....................................................................................- 14 - 1.5 PLC的物理结构 ................................................................................................- 14 -
1.5.1 整体式PLC ............................................................................................- 14 - 1.5.2 模块式PLC ............................................................................................- 14 - 1.5.3 CPU模块中的存储器 ..............................................................................- 14 - 1.5.4 I/O模块 ................................................................................................- 15 - 1.5.5 PLC的工作原理 .....................................................................................- 15 -
第二章 控制方案设计 ....................................................................................................- 17 -
2.1 技术控制要求...................................................................................................- 17 -
2.1.1 交通模拟面板示意图..............................................................................- 17 - 2.2 总体方案确定...................................................................................................- 18 -
2.2.1 方案的原理............................................................................................- 18 - 2.2.2 方案的特点............................................................................................- 18 - 2.2.3 方案选择依据 ........................................................................................- 19 -
第三章 硬件、软件的选择与硬件连接 ............................................................................- 20 -
3.1输入点与输出点分配 .........................................................................................- 20 - 3.2 硬件选择..........................................................................................................- 20 - 3.3软件选择 ..........................................................................................................- 22 - 3.4硬件连接 ..........................................................................................................- 22 - 第四章 编程设计 ...........................................................................................................- 23 -
4.1编写程序流程图 ................................................................................................- 23 - 4.2编写梯形图 .......................................................................................................- 25 - 第五章 系统调试 ...........................................................................................................- 28 -
5.1系统程序调试 ...................................................................................................- 28 - 5.2系统硬件调试 ...................................................................................................- 28 - 5.3程序梯形图 .......................................................................................................- 29 - 第六章 总结 ..................................................................................................................- 36 - 致 谢 .............................................................................................................................- 37 - 参考文献........................................................................................................................- 38 - 附录： ...........................................................................................................................- 39 -
程序指令表：..........................................................................................................- 39 -
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plc交通灯系统设计
电源图：.................................................................................................................- 44 - 输入端接线图： ......................................................................................................- 45 - 输出端接线图： ......................................................................................................- 46 - 控制原理图：..........................................................................................................- 48 - 硬件布置图：..........................................................................................................- 50 -
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