文档介绍：沈阳化工大学
本科毕业论文
题目: 液体搅拌器装置模拟控制系统设计
院系: 信息工程学院
专业: 电气工程及其自动化
班级: 电气优创0601
学生姓名: 孟繁江
指导教师: 杨忠君
论文提交日期: 2010 年 6 月 25日
论文答辩日期: 2010 年 6 月 30日
内容摘要
随着现代工业技术的快速发展,液体混合的应用更加广泛。对于液体混合控制技术的研究有着广泛的经济价值。针对这一问题本毕业设计重点研究了基于PLC控制的液体混合实时监控系统。该系统就是一个简单的集散控制系统。借助现代计算机技术,实现对搅拌器的集中控制,分散管理。
本设计通过对两种液体的混合搅拌器控制为例,将两种液体按一定比例混合,在电动机搅拌后要达均匀状态将混合的液体输出容器并形成循环状态。液体混合系统的控制设计考虑到其动作的连续性以及各个被控设备动作之间的相互关联性,针对不同的工作状态,进行相应的动作控制输出,从而实现液体混合系统从第一种液体加入到混合完成输出的这样一个周期控制工作的程序实现。
本设计以液体混合的结构和工艺流程的系统为中心,确定了合理的系统控制方案。选用西门子公司的S7-200PLC作为现场控制器,利用step7进行液体混合运作程序编写,组态软件进行组态工作,建立一个人机交换界面,并实现PLC和组态软件之间通讯。通过使用远程计算机,实现对现场液体混合运行情况的实时监控。
关键词:两种液体;搅拌器;自动控制
Abstract
Along with the rapid development of modern industrial technology, liquid mixture of more widely. For liquid mixing control technology has been widely studied the economic value. In order to solve this problem the graduation design is mainly studied based on PLC control of liquid mixing real-time monitoring system. This system is a simple distributed control system. Using the puter technology, realizing the centralized control of mixer, decentralized management.
This design is based on the two liquids mixed mixer control, for example, two kinds of liquid mixing proportional to stir in motor of uniform state will be mixed liquid output containers and circulation. Liquid mixing system control design consideration of the accused and all the continuity of the relationship between the movement equipment, according to the different working conditions, carries on the corresponding action control output, so as to achieve the liquid mixing system from the first kind of liquid into mixed finish such a cycle of output control work procedures. Design with liquid mixing structure and process of the system as the center, the reasonable control scheme of the system. Selection of Siemens S7-200 PLC controller, use a site for liquid mixing step7 operation programming, at the same time with the configuration software
configuration, establish a human-machine