基于力控的液位测量控制系统的设计.doc

基于力控的液位测量控制系统的设计 PAGE PAGE 2 毕业设计（论文） 基于力控的液位测量控制系统的设计 摘 要 油罐在石油化工工业生产及贮油方面具有不可忽视的作用，既然这样，油罐的液位测量就显得非常重要。本论文在对比国内外相关课题后，提出了一套完整的油罐液位系统测量方案。该系统采用可编程控制器（PLC）的电源模块，CPU模块及模拟、数字的输入、输出模块作为硬件，并将其相互连接达到液位和温度的测量及显示作用，同时利用Pro-32程序作为该系统的软件对其进行温度信号的采集和液位信号的测量。最后，再应用力控软件对该系统进行仿真。 该系统包括三套液位测量装置，在本次设计中应用小型以太网联接在一起，达到分散设备，集中控制的目的。 关键词：液位测量 PLC 以太网 Abstract Oilcan has the function that have to cant neglect in petroleum chemical engineering industry production and the oil of storing, since like this, the measures liquid of the oilcan and then seem to be very important.My thesis put forward a set of complete oilcans liquid system diagraph project after contrasting domestic and international and related lesson.The system supply power model,CPU model and analog,digital input,output model as its hardware,combining its mutually connection to attain the liquid a diagraph with manifestation function of temperature, combining exploitation procedure Pro-32 conduct and actions that system of the programmable controller( PLC) in adoption in the system proceed the temperature signal collects with the diagraph of the liquid a signal.Finally, then the applied dint really control the software to proceed to imitate to the system. The system includes three sets of equipment for measuring liquid device, in this design They are connected together by applied small scaled ether net, and get dispersion equipments, concentrating control. Key phrase: The liquid measures The PLC Ether net 目 录 第一章 前言 1.1 课题概述……………………………………………………………………4 1.2 课题意义……………………………………………………………………4 第二章 系统设计概述 2.1 概述…………………………………………………………………………5 2.2 液位测量系统工艺流程图…………………………………………………5 2.3 系统控制面板………………………………………………………………7 2.4 电气主回路…………………………………………………………………8 第三章 基于以太网的现场总线技术 3.1什么是以太网………………………………………………………………9 3.2什么是现场总线……………………………………………………………9 3.3基于以太网的现场总线技术………………………………………………9 第四章 系统硬件设计 4.1 概述…………………………………………………………………………11 4.2 模块选取……………………………………………………………………11 4.3 模块简介及接线……………………………………………………………13 第五章 系统软件设计 5.1 概述………………………