基于三菱PLC交通灯控制设计.doc

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1、.基于三菱PLC交通灯控制设计说明书题目：手动交通灯控制指导老师：xxx学生姓名：xxx学号：xxx所属院系：机械工程学院专业：机械工程班级：xxx完成日期：xxx机械工程学院2017年03月教育资料.目录摘要····································································3第一章PLC控制交通灯系统···········································41.1十字路口交通灯控制实际况·············

2、··························41.2结合十字路口交通灯的路况模拟控制实验···················41.3交通灯控制流程图············································5第二章交通灯硬件设计················································62.1硬件及外围元器件的选择··········································62.2PLC外部接线图的设计··教育资

3、料.··········································62.3交通灯的保护措施··················································72.4干扰的来源·························································82.5抗干扰措施·····················································9第三章交通灯控制程序设计············

4、······························93.1控制程序梯形图··················································93.2程序设计指令表···················································133.3程序仿真过程················································15第四章教育资料.设计总结·································

5、······················174.1难点分析···························································174.2调试错误与修改方法·············································18总结心得·····························································19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

6、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。教育资料.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

7、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。第一章PLC控制交通

8、灯系统1.1十字路口交通灯控制实际情况南北方向绿十秒红十三秒黄三秒东西方向绿十秒红十三秒黄三秒注：以上这些都是基本设定值，可根据实际需要调整红绿灯的时间。且设计为单行道循环控制方式交通灯变化顺序表（基本单循环周期26秒）教育资料.南北方向和东西方向均设有直行绿灯10秒，黄灯闪烁3秒，红灯10秒。当南北主干道红灯点亮时，东西主干道依次点亮主干道绿灯和主干道黄灯。反之，当东西