发布时间 : 星期六 文章PLC在十字路口交通灯控制系统中的应用2毕业设计论文更新完毕开始阅读1f9fcb8e0408763231126edb6f1aff00bed57039
插图索引
图1 交通灯的放置 ........................................................................................................................ 12 图2 交通信号灯PLC控制硬件接线图 ....................................................................................... 13 图3 交通信号灯的状态波形图 .................................................................................................... 16
附表索引
表1 S7-200 IO编址 ......................................................................................................................... 8 表2 交通灯亮闪表 ........................................................................................................................ 12 表3 交通信号灯PLC的输入输出点的分配表 ........................................................................... 13
PLC在十字路口交通灯控制系统中的应用
摘 要
PLC可编程序控制器是以微处理器为基础，综合了计算机技术、自动控制技术和通讯技术发展而来的一种新型工业控制装置。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、CADCAM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。可缩短车辆通行等候时间，实现科学化管理。在该设计中，还引入EDA模拟十字路口红绿灯闪亮及车辆通行，十分形象地显示出了PLC在交通灯系统中的实际应用。
【关键词】：十字路口 交通灯 PLC
The application of PLC in intersection traffic light control system
Abstract
The PLC programmable logic controller is a new industrial control devices, which is based on microprocessor, synthesizes computer technology, automatic control technology and communication technologies. It the commercial run and position automatic control. Statistics the industrial automation installment applies. The expert believed that the programmable controller will become the main method and one of important foundation equipment in further, PLC, the robot, CADCAM will become the industrial production three big props. Because PLC adapts to environment strong, simultaneously its internal timer resources are extremely rich, which carry on the accuracy control to the present universal use many “the evolution type” the signal light, special to the multi-road fork control. Therefore the present PLC is used in the traffic light system, which may reduce the vehicles general waiting time and realize scientific style management. In this design, also introduces the EDA simulation intersection traffic light to glisten and the vehicles to passes through, which visual demonstrates PLC in the traffic light system practical application.
【Key words】 crossroads traffic light PLC