文档介绍：毕业设计(论文)报告纸┊┊┊┊┊┊┊┊┊┊┊┊┊装┊┊┊┊┊订┊┊┊┊┊线┊┊┊┊┊┊┊┊┊┊┊┊┊摘要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。实现路口交通灯系统的控制方法很多,可以用标准逻辑器件、可编程序控制器 PLC 、单片机等方案来实现。其中用标准逻辑器件来实现电路在很大程度上要受到逻辑器件如门电路等的影响,调试工作极为不易,而单片机编程复杂不容易掌握,因此, 最终我们选择了用可编程的控制器 PLC 来实现系统功能的设计。可编程序控制器在工业自动化中的地位极为重要,广泛的应用于各个行业。随着科技的发展,可编程控制器的功能日益完善,加上小型化、价格低、可靠性高,在现代工业中的应用更加突出。城市交通灯控制采用的可编程制器具有可靠性高、维护方便, 用法简单、通用性强等特点,本文用三菱 FX2N 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。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。本文分析了现代城市交通控制与管理问题的现状,结合交通的实际情况阐述了交通灯控制系统的工作原理,给出了一种简单实用的城市交通灯控制系统的 PLC 设计方案。关键词:PLC (可编程序控制器),三菱 FX2N ,可靠性高,交通灯毕业设计(论文)报告纸┊┊┊┊┊┊┊┊┊┊┊┊┊装┊┊┊┊┊订┊┊┊┊┊线┊┊┊┊┊┊┊┊┊┊┊┊┊ ABSTRACT With the development ofsociety and economy, city traffic problems caused bymore and more people's attention. The harmony between people, car, road three relations, has e one ofthe important problems oftraffic management departments tosolve . Acontrol method for realizing traffic light system, can use the standard logic devices, programmable logic controller PLC, SCM scheme implementation. The use ofstandard logic devices torealize the circuit will beinfluenced bythe logical device such asgates, toalarge extent, debugging isextremely difficult, and microcontroller plex and not easy tograsp, therefore, wefinally chose the design ofprogrammable controller PLC to realize the function ofthe system. The variable procedure controller isinindustry automate the position isextremely important, extensive application ineach profession. Along with the development ofscience and technology, the function ofthe programmable controller isincreasingly perfect, plus smallscaled turn, the price islow, the credibility ishigh, the application that isinmodern industry ismore out standing. The city transportation light control adopts programmable to make the tool contain high credibility, the maintenance convenience, the method ofusing issimple, the ingeneral use strong etc. characteristics, this text uses the design that the programmable controller ofthe Mitsubishi FX2