plc的交通信号灯系统设计说明书.docVIP

编号： PLC实训说明书题 目：PLC的交通信号灯系统设计 院 （系）： 机电工程学院 专 业： 机械设计制造及其自动化 学生姓名： 学 号： 指导教师： 2012年1 月6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异的更新。它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。它具有机构简单、编程方便、可靠性高等优点，已广泛应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。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，目前普遍使用的“渐进式”信号灯进行精确控制，特别是对多岔路口的控制可方便地实现。因此现在越来越多的将PLC应用于交通信号灯系统中。同时，PLC本身还具有通信连网功能，将同一条道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。在实时监测和自动控制的PLC应用系统中，PLC往往是作为一个核心部件来使用，仅PLC方面还不够的，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，十分形象的显示出PLC在交通系统中的实际应用。关键字：PLC ；交通灯；自动化AbstractWith the rapid development of science and technology in recent years, PLC applications are continually deepening, while the traditional control test drive the rapid update. It is a microprocessor-based, integrated computer technology, automatic control technology and communication technologies developed from a new type of industrial control devices. It has the organization is simple, easy programming, high reliability, has been widely used in industrial process and location of the automatic control. According to statistics, the programmable controller is the most widely used industrial unit in a device. Experts believe that the PLC will become the main means of industrial controls and one of the important infrastructure. The use of the PLC has the characteristics of environmental adaptability, while its internal timer is rich in resources, the current widespread use of the progressive signal for precise control, especially for the control of multi-fork can be easily achieved. Therefore, the PLC is now used more and more traffic lights system. Meanwhile, PLC itself also has a communications networking capabilities, with a trail of lights to form a unified LAN management, and can shorten the waiting time for vehicle traffic, to achieve scientific management. In real-time monitoring and application of automatic contro