具体如下:在入路口的各个方向附近的地下按要求埋设感应线圈,一律强制让急车方向的绿灯亮,
摘 要
可编程序操控器在工业自动化中的地位极为重要。可用如下方案来操控交通路况:制作传感器探测车辆数目来操控交通灯的时长。三菱系列的可编程序操控器和传感技术来实现对交通灯的智能信号操控。
目 录 20000字
第1章 绪论
1.1引言 4
1.2课题研究背景.4
1.3现代城市交通灯操控现状.5
1.4本课题主要研究内容.6
第2章 PLC功能简介
2.1概论.7
2.2可编程操控技术的发展及趋势10
2.3主要用途.13
2.4可编程操控器的特点.13
2.5可编程操控器的组成.16
2.6PLC的工作原理.17
2.7主要功能.19
第3章 交通灯操控电路的设计
3.1 PLC正常时序..22
3.2I/O地址分配.22
3.3操控要求.23
3.4设计方案.24
3.5运行程序语句表. 38
3.6运行效果.40
第4章 总结.40
参考文献. 41
致谢 ... 42
,不能够根据实际交通状况进行调节操控。当一方车流量过大的时候,PLC要对操控这一路段的信号灯进行调控,让滞留或堵车的一方绿灯时间加长,直到交通畅通为止这种工作的好处是避免了交通堵塞造成的不必要的麻烦与事故,对交通的操控进行很方便,很便捷。城市交通灯操控采用的可编程制器具有可靠性高、维护方便,可编程操控器的功能日益完善,即可检测出汽车的通过,加上小型化、价格低、可靠性高,信号灯接正常时序操控；有急车来时,使急车放行,传感器起到勘测车流量的存在与通过的作用。随着科技的发展,并用PLC计数,并将这一信号转换为标准脉冲信号作为可编程操控器的操控输入,在路口与路尾设置两个传感器进行检测车流量.交通路段车流量繁忙时,在现代工业中的应用更加突出。
Abstract
The variable procedure controller is in industry automate the position is extremely important, extensive application in each profession. Along with the development of science and technology, the function of the programmable controller is increasingly perfect, plus smallscaled turn, the price is low, the credibility is high, the application that is in modern industry is more out standing. The city transportation light control adopts programmable to make the tool contain high credibility, the maintenance convenience, the method of using is simple, the in general use strong etc. characteristics, this text uses the design that the programmable controller of the Mitsubishi FX2N control intersections conveyance light explains the programmable controller hardware software. Resolve the good highway transportation light control problem will is guarantee the transportation contain preface, safety, fast movement of important link. But the transportation signal beacon control systems have now are all the single and fixed cycle times controls, can't carry on regulating the control according to the actual transportation condition enough. The programmable preface controller of the Mitsubishi series and spread the feeling technique to carry out the intelligence signal control toward the transportation light. Can use as follows the project controls the transportation situation on road: the creation spreads the feeling machine to probe into the vehicle quantity the hour of control the transportation light is long. In a specific way and as follows: The at go the into the underground of the each the direction neighborhood the of the street corner the to lay the to respond the coil the according to the trequest, the be the automobile to the pass by the will produce the to flow the to exhaust, the wreath the form insulates the electricity the feeling of the electric the wire to start reduce, can immediately examine pass of an automobile, and convert this signal control importation that is the programmable controller for the standard pulse signal, counteract the PLC to count, long by the hour that the certain control regulation regulates the traffic lights automatically.
Keywords：PLC( Programmable Logical Controller); Trapezoid; diagram; Instruction In proper order function diagram Transportation light
三菱系列FX2N PLC
本课题主要研究内容
按照城市交通操控的需要,当汽车经过时就会产生涡流损耗,广泛的应用于各个行业。
关键词： PLC（可编程序操控器）; 三菱FX2N;传感器探测;交通灯。但现在有的交通信号灯操控系统都是单一的固定时序操控,按一定操控规律自动调节红绿灯的时长。解决好公路交通灯操控问题将是保障交通有序、安全、快捷运行的重要环节。
交通滞留的异常情况,用法简单、通用性强等特点,环状绝缘电线的电感开始减少,本文讨论了用PLC实现正常时序、急车强通2种操控方法,本文用三菱FX2N的可编程操控器操控十字路口信号灯来说明可编程操控器硬件、软件的设计。
正常时序操控对路面进行操控.南北方向红灯时,东西方向绿灯.绿灯闪3秒紧接着黄灯闪2秒,变红灯.南北方向红灯直接变绿灯.东西方向红灯时同理.
急车强通时,发送信号给交通灯让其对来急车方向的交通灯进行绿灯畅通. 急车强通信号受急车强通开关操控；无急车时,直至急车通过为止。通过传感器与PLC完成对交通异常状况（滞留或堵车）的判别及处理
