交通灯毕业设计

摘要

自动控制装置的先进程度是体现工业自动化水平的重要标志。随着计算机技术和微电子技术的迅猛发展,可编程序控制器已经成为工业控制的标准设备之一。用内部编程“软元件”取代继电器逻辑控制电路中大量的时间继电器和中间继电器,简化控制线路、提高系统可靠性,是PLC的最大优点；根据实际工艺要求,借助于顺序功能图和梯形图来编制用户控制程序,实现单台设备或生产过程的顺序控制,则是PLC的主要功能之一。

本课题是对可编程控制器的顺序控制进行实际的应用，通过欧姆龙的CPM1A可编程控制软件对十字路口交通灯编写来研究顺序控制在使用中的作用。

随着社会经济的发展，城市交通问题越来越引起人们的关注。人、车、路三者关系的协调，已成为交通管理部门需要解决的重要问题之一。城市交通控制系统是用于城市交通数据监测、交通信号灯控制与交通疏导的计算机综合管理系统，它是现代城市交通监控指挥系统中最重要的组成部分。

关键词：PLC、CX-Programmer、CD4511、顺序控制、梯形图、数码管显示

Abstract

The advanced degree that the automatic control equips is the important sign that embodies industry automation level.Along with the fast fierce development of the calculator technique and the micro-electronics technique, the programmable preface controller has already become one of the standard equipmentses of industrial control.Weaving the distance"soft component" to replace with the inner part after a great deal of time in the electric appliances logic control electric circuit after the electric appliances and in the center simplifying control circuit and raising system credibility after the electric appliances is PLC the biggest advantage;Request according to the actual craft, ask for help from in proper order function diagram and trapezoid diagram to draw up customer control procedure, carry out single set equipments or the in proper order control of production line, then one of the PLC main functions.

This topic carries on an actual application to the in proper order control of programmable controller and pass the CPM1 A programmable control software of Mu dragon in Europe to write to the intersections transportation light to study an in proper order control in the function in the usage.

Along with the development of social economy, transportation problem in the city more and more causes the concern of people.Person, car and road three relate to of coordination, have become a transportation management the section need one of the important problems for working out.The transportation control system in city is to used for a transportation data monitor in city, traffic sign light control and the calculator that transportation appease synthesize management system, it is modern city transportation to supervise and control conductor to constitute

most importantly in the system part.

Keyword:PLC, CX-Programmer, CD4511, in proper order control, the trapezoid diagram, figures tube show

目录

摘要.................................................................................................... I Abstract .............................................................................................. I I 第1章绪论 (1)

1.1 课题背景 (1)

1.2 课题目的 (1)

1.3 国内外现状 (2)

第2章PLC的概述 (3)

2.1 PLC的发展历程 (3)

2.2 PLC的构成 (4)

2.3 PLC的特点 (10)

2.4 PLC的功能 (11)

2.5 PLC的工作原理 (12)

本章小结 (12)

第3章硬件系统设计 (13)

3.1 交通灯显示的设计 (13)

3.2 倒计时显示的设计 (14)

3.2.1 七段共阴极数码管的引脚图 (15)

3.2.2 CD4511的使用说明 (15)

3.3 PLC的I/O点的分配 (16)

本章小结 (17)

第4章软件设计 (18)