基于智能仪表和PLC的液位控制系统方案设计书1.docVIP

毕业设计(论文) 题 目：基于智能仪表和PLC 的液位控制系统设计 学生姓名： 牛春晓 学 号： 200905280115 班 级：工业网络技术091班 指导教师： 文晖 完成日期： 信息处理与控制工程系 毕业设计任务书 设计（论文）题 目 基于智能仪表和PLC的液位控制系统设计 选题时间 2011-8-20 完成时间 论文（设计）字数 关键词 设计（论文）题目的来源、理论和实际意义： 设计（论文）的主要内容： 学生签字： 指导教师签字： 系负责人签字： 年 月 日 摘要可编程控制器Programmable Logic Controller---PLC)是一种应用广泛非常的自动控制装置，它将传统的继电器控制技术、计算机技术和通讯技术融为一体，具有控制能力强、操作灵活方便、可靠性高、适宜长期连续工作的特点，非常适合液位控制的要求。 本文介绍了基于智能仪表、西门子S7-300型可编程控制器（PLC）、组态软件的液位控制系统的设计方案。系统采用PID算法，实现液位的自动控制。利用组态软件设计人机界面，通过串行口和可编程控制器通信，实现的实时监控、数据采集与处理Abstract Nowadays intelligent measuring appliance is improving more and more quickly.It has been used in more an more place of our life.It can make Electric circuit much easier than before.And the control can be realized much more precise and convenient. Microelectronics and computer technology continues to develop, led to fundamental changes in the structure of instruments to micro-computer (single chip) as the main body, the computer technology and the organic integration of detection technology to form a new generation of smart meters in Measurement of process automation, measurement data processing and functional diversification of the traditional instrument, compared to conventional measuring circuit, tremendous progress has been made. PLC is a very useful control installment . It is widely used in a lot of control system in ourlives. It is the product of the computer,control,communication technology.It can make Electric circuit much easier than before.And the control can be realized much more precise and convenient.It very suits the control of water level. It will relay the traditional control technology, computer and communication technologies together with the control, and operation of flexible convenient, high reliability, suitable for continuous long-term characteristics of the work, very suitable for liquid level control requirements. This the