【作者】 周杰；

【导师】 潘宏侠；

【作者基本信息】 中北大学 ， 控制理论与控制工程， 2008， 硕士

【摘要】 为了提高企业的综合实力和生产效率,企业自动化和信息化成为必然。在此基础上,本文研究了监控系统在电镀行业内的具体应用。某集团深孔电镀车间由于种种原因,系统自动控制方式已彻底失效,现场的控制主要是人工操作,极大地限制了产品的合格率的提高,严重阻碍了生产的发展。针对原控制系统存在的弊端以及对改造后控制系统的需求,在保留原手动控制方式下,本文提出了利用西门子组态软件WinCC和S7-300系列PLC以及原系统中的一些自动化设备组成DCS系统,实现整个电镀生产过程的自动化,同时增加了系统远程监视的功能,对生产过程实时监控,确保整个生产过程顺利的进行。本文研究了利用上位机组态软件完成数据采集、历史数据库管理、生产工艺参数设置、生产现场模拟显示、报警、报表和打印功能。同时根据用户要求,利用脚本语言对WinCC二次开发,设计了深孔镀铬数据管理系统,利用自制数据库实现了字符型变量的存储和搜索显示,同时通过中间数据库翻译将WinCC以时间进行数据查询的方式扩展到以任意字符进行数据查询,在很大程度上提高了查询效率且操作简便。为了实现对镀铬过程中工艺参数准确控制,针对深孔镀铬的工艺特点,本文提出并设计了将双工艺推广到多工艺的步趋控制方案,基于激励分析的变负载硅整流电源自动控制的方法以及利用上位机和原系统中的温控仪表组网的多点温度控制方案。考虑到控制系统的复杂性及对多线程的需求,由上位机编制控制策略,下位机PLC执行现场控制。系统调试完后进行了试运行实验,采集的实验数据,验证了监控方案的可行性。更多还原

【Abstract】 In order to win in fierce marketing competition, the enterprises have to improve the competitive power with the enterprise automation and information. For this, this thesis researches the application of the monitoring system in electroplating line.Auto-control mode of the deep-hole electroplating system in a workshop of some cooperation has failed to work because of various reasons. The sport control has to be done by manpower, which restricts the increase of product qualification rate and hinders the productivity.To overcome shortcomings of the original control system and to meet the demand of a renewed control system, a wholly automatic electroplating produce process is proposed based on a DCS system which consists of Siemens configuration software WinCC, S7-300 PLC and some original automation equipment. A system long-distance surveillance is also included to do real time observation to ensure a smooth produce process.This thesis studies how to use configuration software of upper monitor to do the task of data collection, historical database management, setting up of produce process parameters, simulate display of produce scene, giving alarms, making report forms and printing. Moreover, to meet users’demand, a deep-hole chrome plating data management system has been developed by means of redevelopment of WinCC on the basis of script language, and saving and inquiry of character variables are realized by self-directed database. With the help of middle database translation, WinCC can change the data inquiry mode from time to any character, which largely increases inquiry efficiency and maneuverability.To realize an accurate control of parameters in the chrome plating process, in the light characteristics of deep-hole chrome plating, this thesis works on a step-more control plan which extends from dual process to multi-process, varying load rectifier equipment control method based on incentive-analysis and multi-point temperature control scheme making use of upper monitor and the temperature-control instruments in the original system. To take into account the complexity of control system and the demand on multi-threading, upper monitors compile control strategy and lower monitors carry out spot controlA trial run has been done after the system debugging and the collected experimental data prove the feasibility of monitoring scheme.更多还原