毕业论文---plc交通灯毕业设计.doc

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更新。在实时检测和自动控制的单片机应用系统中，单片机往往是作为一个核心部件来使用，仅单片机方面的知识是不够的。还应该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。交通信号灯的出现使交通得以有效管制，对于疏导交通流量，提高道路通行能力减少交通事故有明显效果。俗话说“要想富，先修路”，但路修好了如果在交通控制方面做不好道路还是无法保障畅通安全。以山西省阳泉市为例，由于阳泉市地形所致，市内道路路面窄，每到上下班时间交通显得拥挤不堪。因此交通灯显得尤为重要，合理控制交通灯更是阳泉市交通的重要部分。由于笔者在实习期间接触到不少MITSUBISHI系列的PLC,MITSUBISHI FX1N-60MR等器材，所以我选择做交通灯的设计来作为我的毕业设计。 关键词：交通灯; 自动控制; PLC Abstract With the development at full speed of science and technology in recent years, the application of the one-chip computer is moving towards deepening constantly, drive tradition is it measure crescent benefit to upgrade day to control at the same time. In measuring in real time and automatically controlled one-chip computer application system, the one-chip computer often uses as a key part, only one-chip computer respect knowledge is not enough, should also follow the structure of the concrete hardware , and direct against and use the software of targets characteristic to combine concretly, perfect . The appearance of the traffic signal lamp , make the traffic be controlled effectively, for dredging the flow of traffic, improving the traffic capacity of the road, there are obvious results to reduce the traffic accident. As the saying goes want rich , repair the roads first , but way build up if control do road well to be unable to ensure the unblocked security in traffic. The traffic signal lamp of the important composition component controlled as the traffic should be suitable for the social actual conditions too. For example,Yangquan of city,Shanxi province.As Yangquan of city place’ highway that is narrow,traffic of congestion go home and work every time.I find a job in city,I studied MINTSUBISHI PLC..So,I choose controll traffic light of PLC to my graduation design. Key word: Traffic light; automatic allies control; PLC 目 录 第一章 绪 论 1 第一节? PLC实现十字路口红绿灯自动控制的背景 1 第二节 PLC控制交通灯设计目的 1 第三节 阳泉市交通现状 2 第四节 阳泉市未来交通控制 3 第二章 可编程控制器 5 第一节 可编程控制器的定义 5 第二节 PLC的构成 5 第三