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基于三菱PLC交通灯控制设计说明书

题 目：指导老师：学生姓名：学 号：所属院系：专 业：班 级：完成日期： 手动交通灯控制 xxx xxx xxx

机械工程学院 机械工程 xxx xxx

机械工程学院

2017 年03月

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目录

摘要 ····································································3

第一章 PLC控制交通灯系统 ···········································4 1.1 十字路口交通灯控制实际况·······································4 1.2 结合十字路口交通灯的路况模拟控制实验 ···················4 1.3 交通灯控制流程图· ···········································5第二章 交通灯硬件设计················································6 2.1 硬件及外围元器件的选择··········································6 2.2 PLC外部接线图的设计············································6 2.3 交通灯的保护措施··················································7 2.4 干扰的来源· ························································8 2.5 抗干扰措施 ·····················································9 第三章 交通灯控制程序设计 ··········································9 3.1 控制程序梯形图 ·················································· 9 3.2 程序设计指令表··················································· 13 3.3 程序仿真过程 ················································ 15第四章 设计总结······················································· 17 4.1 难点分析··························································· 17 4.2 调试错误与修改方法············································· 18 总结心得 ·····························································19

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摘要

据不完全统计，目前我国城市里的十字路口交通系统大都采用定时来控制(不排除繁忙路段或高峰时段用交警来取代交通灯的情况)，这样必然产生如下弊端:当某条路段的车流量很大时却要等待红灯，而此时另一条是空道或车流量相对少得多的道却长时间亮的是绿灯，这种多等少的尴尬现象是未对实际情况进行实时监控所造成的，不仅让司机乘客怨声载道，而且对人力和物力资源也是一种浪费。交通信号灯的出现，使交通得以有效管制，对于疏导交通流量、提高道路通行能力，减少交通事故有明显效果。

为了实现交通道路的管理，力求交通管理先进性、科学化。用可编程控制器实现交通灯管制的控制系统，以及该系统软、硬件设计方法，实验证明该系统实现简单、经济，能够有效地疏导交通，提高交通路口的通行能力。分析了现代城市交通控制与管理问题的现状，结合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PLC设计方案。可编程序控制器在工业自动化中的地位极为重要，广泛的应用于各个行业。随着科技的发展，可编程控制器的功能日益完善，加上小型化、价格低、可靠性高在现代工业中的作用更加突出。同时，PLC本身还具有通讯联网功能，将同一条道路上的信号灯组成一局域网进行统一调度管理，可缩短车辆通行等候时间，实现科学化管理。

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