基于可编程器件(PLC)的交通控制器的设计毕业论文.doc
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毕 业 论 文
题 目: 基于可编程器件(PLC)的交通控制器的设计
院系名称:机电一体化
专业班级:08 大 专
学生姓名:贾 鹏 飞
学 号:
指导教师:代 瑛
2011 年 2 月 20 日
摘 要
近年来随着科技的飞速发展,PLC的应用正在不断地走向深入,同时带动传统控制检测日新月益更新。它具有结构简单、编程方便、可靠性高等优点,已广泛用于工业过程和位置的自动控制中。据统计,可编程控制器是工业自动化装置中应用最多的一种设备。专家认为,可编程控制器将成为今后工业控制的主要手段和重要的基础设备之一,PLC、机器人、CAD/CAM将成为工业生产的三大支柱。由于PLC具有对使用环境适应性强的特性,同时其内部定时器资源十分丰富,可对目前普遍使用的“渐进式”信号灯进行精确控制,特别对多岔路口的控制可方便地实现。因此现在越来越多地将PLC应用于交通灯系统中。
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。在实时检测和自动控制的PLC应用系统中,PLC往往是作为一个核心部件来使用,仅PLC方面知识是不够的,还应根据具体硬件结构,以及针对具体应用对象特点的软件结合,加以完善。十分形象地显示出了PLC在交通灯系统中的实际应用。
关键字:PLC 交通灯 程序 设计
Traffic lights based on PLC design
Abstract
In recent years, with the rapid development of science and technology, PLC application is continuously, while driving to the deepening traditional control test new month jether updates. It is simple in structure, programming, convenient and high reliability etc, has been widely used in industrial process and position in the automatic control. According to statistics, programmable controller is applied in industrial automation devices most kind equipment. Experts think, programmable controller will become the main means and industrial control equipment, one of the important basis of PLC, robots, CAD/CAM will become the industrial production of the three pillar. Due to the use environment of PLC has characteristics of strong adaptability, and its internal timer resources are very rich, but the current widely used progressive lights precise control, especially for the crossway control can be easily realized. So now increasingly applying PLC traffic system.
Meanwhile, PLC itself also has communication networking functions, same path on the coast as part of a LAN unified dispatching management, can shorten the traffic waiting times, to realize scientific management. In real-time detection and automatic control of PLC application system, PLC is often as a core compo
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