基于PLC和VB的信息化监控系统的设计与应用-闸北水厂沉淀池自动排泥监控系统.doc

基于PLC和VB的监控系统的设计与应用---闸北水厂自动排泥系统 摘 要 随着科学技术的发展，特别是可编程控制器（PLC）、计算机和网络通信技术的高速发展。自动化控制越来越广泛地被应用于各种生产领域。自动化控制在提高生产效率和精确性的同时，还能大大地降低人力和物资成本。 本文在了解水厂沉淀池处理工艺流程的基础上，设计和实现了以PLC和VB为核心技术的远程智能监控系统。并提出了“大脑与小脑”上下协作的监控方式的概念。以PLC、继电器等作为“小脑”，做底层简单行为控制；以VB、生产数据中心等作为“大脑”，通过做上层复杂行为控制。 本设计作为一个完整的监控系统，除了编程控制外，还涉及计算机与PLC的远程通讯技术。本文还叙述了无线网络技术的原理和实际应用的情况。还有监控软件的界面设计、数据采集和处理（报表系统）的设计和实现，让实际操作的工人能直观、方便、友好地使用这套系统。 同时，智能控制和数据库共享也是一个重要方面。本文介绍了如何通过数据中心与水厂其他自动化系统间实现共享。然后通过这些实时数据的计算，能智能的、动态的改变控制策略。以达到节约生产成本的目标。 （通过实际应用，该系统可行而实用，运行良好，达到了设计目的和要求。） 关键词： VB（可视化BASIC编程） PLC（可编程控制器） DDE（动态数据交换机制）ADO（ActiveX数据对象）智能监控 行车式排泥机 平流式沉淀池 Design and Application of Information-Based Monitor-Control System Based on PLC and VB ---- Zhabei Waterworks Sedimentation Tank Automatic Sludge Water Discharge Monitor-Control System ABSTRACT Autocontrol more and more used in all kinds of manufacture field, since the development of science technology especially the high development of PLC and Network communication technology. Autocontrol develops manufacture efficiency and accuracy, while it can also reduce the cost of Human resource and Materials. It is designed and achieved the remote intelligent monitoring system with the core technic of PLC and VB based on finding out sedimentation tank treatment process of waterworks in this article. The conception of mutual cooperation“cerebrum and cerebellum” Monitoring methods has also been proposed. Treat PLC and relay as cerebellum to do basic behavior control; Treat VB and production data center as cerebrum to do the upper complex behavior control. A whole system of monitor including not only programming control, but also remote computer and PLC communication technology in this article. This paper describes the principles and practical applications of the wireless network technology. In order to make operation workers to use this system more intuitive; convenient and friendly, how to achieve interface design; data acquisition and processing reports also be mentioned in this