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范文字数:33655,页数:60 附任务书，开题报告，文献综述 基于PLC的城市交通控制系统设计 摘 要：目前，国家经济飞速发展，随之而来的我国城市交通问题也日趋严重，传统的监控模式已经不能满足当代城市交通控制系统的要求，必须要有一种更加合理，更加简便的城市交通控制系统出现，以保证城市道路的安全畅通。而基于PROFIBUS现场总线的城市交通控制系统正是这样一种系统。本文首先介绍了几类比较流行的现场总线及其特点，其中重点介绍了PROFIBUS的特点和发展前景，并阐述了本课题的意义和发展趋势；接着对硬件进行了设计，给出了拓扑结构图，选出了所需的硬件部件并详细介绍了其功能，还给出了交通灯硬件接线图及硬件配置表；然后提出了基于PROFIBUS现场总线网络的通信网络方案和通信原理，介绍了PROFIBUS的协议结构和存储协议，详细阐述了帧的结构、系统行为、数据通信及扩展功能等；最后详述了系统工作方式，并设计出系统的主要程序。 关键词：PROFIBUS；城市交通；PLC The Urban Traffic Control System Based on PLC Abstract：At present, national economy is developed at a high speed, the following problem of city traffic of our country is serious day by day too, the traditional control mode can not already meet the demand for the contemporary urban traffic control system, there must be a kind of more rational and more simple and more convenient urban traffic control system and appear, so as to ensure the urban road is safe and smooth. And the urban traffic control system based on PROFIBUS is exactly this system. This text has introduced several kinds of more popular on-the-spot bus and characteristic at first, among them has introduced the characteristic of PROFIBUS and development prospect especially, and has explained the meaning of a subject and development trend; then has designed the hardware, provide the topological structure chart, has elected the necessary hardware part and introduced its function in detail , still provide the light hardware wiring diagram of the traffic and hardware disposition form; use the growth curve in the communication network scheme of PROFIBUS network and communication principle, have introduced the agreement structure of PROFIBUS and store the agreement, explain structure, system behavior, data communication and expanded function of the hardwood,etc. in detail ; detail the system finally and work in the way, and design the systematic main program. Keyword：PROFIBUS；urban traffic；PLC 目 录 点击下载:
 基于PLC的城市交通控制系统设计 (收费:12700 积分)
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