机电一体化毕业设计（论文）-基于PLC十字路口信号灯控制系统设计.doc

基于PLC十字路口信号灯控制系统设计
摘要
当今时代是一个自动化时代,交通灯控制等很多行业的设备都与计算机密切相关。解决好公路交通灯控制问题将是保障交通有序、安全、快捷运行的重要环节。但现在有的交通信号灯控制系统都是单一的固定时序控制,不能够根据实际交通状况进行调节控制。因此,一个好的交通灯控制系统,将给道路拥挤、违章控制等方面给予技术革新。城市交通灯控制采用的可编程控制器具有可靠性高、维护方便,用法简单、通用性强等特点,本文用欧姆龙CPM1A的可编程控制器控制十字路口信号灯来说明可编程控制器硬件、软件的设计。本文中,不但介绍了现有交通灯的工作过程,并增加了一个特殊功能。当某个方向有急车来时,交通灯会强制那个方向的交通灯变为绿灯,使急车放行。急车一过,交通灯又变为正常的工作状态。
关键词: 欧姆龙CPM1A ;交通灯; 智能控制
The present era is an era of automation, traffic light control equipment for many industries are closely related with puter. Solve the control problem of road traffic lights will ensure that traffic orderly, safe, efficient operation of the important part. But now some traffic signal control system is a single fixed timing control can not be adjusted according to actual traffic control. Therefore, a good traffic light control system, will give road congestion, illegal control give technical innovations. Urban traffic light control system using programmable devices with high reliability, easy maintenance, use simple, versatile characteristics, the paper CPM1A Omron programmable controller with control signal to illustrate the intersection of PLC hardware, software design. This article not only describes the working process of the existing traffic lights and adds a special feature. When a direction to emergency vehicles, the traffic in that direction lantern forced into a green traffic light, so that emergency vehicle clearance. Emergency vehicle over, traffic lights has e a normal working condition.
Keywords:Omron CPM1A , traffic light , intelligent control
目录
摘要 Ⅰ
1 绪论 1
1
1
2
2
2 PLC功能简介 3
3
PLC的工作原理 5
7
3 交通信号控制系统分析 10
10
10
结合十字路口交通灯的路况模拟控制实验 11
4 交通灯控制系统设计 13
交通灯控制系统硬件设计 13
PLC选择 13
可编程控制器I/O端口分配 15
PLC的外部接线图 15
16
16
流程图 17
16
5 总结 18
致谢 20
参考文献 21
附录
1 绪论
引言
十字路口的红绿灯指挥着行人和车辆的安全运行