【作者】 王树勇；

【导师】 徐群；

【作者基本信息】 河海大学 ， 控制理论与控制工程， 2003， 硕士

【摘要】 本文以太湖流域太浦闸应急监控系统为背景，对闸站自动化系统的一些典型的问题进行了分析和研究。本文主要讨论了以下几个问题：信号的采集、传输和处理问题；过闸流量的测量方法；计算机监控系统的一般形式，控制方式，监控网络的安全；PLC通信以及系统的可靠性问题。 本文的任务就是针对上述的问题进行了比较深入的分析、研究和探讨，以期为提高我国闸站控制和管理水平提供一定的工程参考。本文的主要工作有以下几个方面： 一、要实现高可靠性、高安全性的控制，必须全面、及时、准确地获取现场的各种信息和状态。文中阐述了闸站自动化系统信息的采集、传输和数据预处理技术并讨论了过闸流量的测量方法。 二、阐述了计算机监控系统设计的一般原则、典型结构，研究了闸门的控制方式以及监控系统的网络安全。 三、研究了PLC网络中常用的通信方式、方法、网络拓扑结构、以及各层子网中通信协议的配置。讨论了PLC与PC之间的通信，包括通信方式和通信原理、通信协议、程序设计等。 四、较具体地分析了影响系统可靠性的因素，并给出了提高可靠性的软件和硬件两方面的措施。更多还原

【Abstract】 Combined with the project, the emergency supervision and control system of Taihu sluice station, some typical problems of automation system of sluice station are analyzed and studied in this paper. It covers following problems: signal collection, transmitting and processing, flow rate measurement, the general structure of computer supervision and control system, control method and security of network, communication of PLC (Programmable Logic Controller) and the reliability of system.The main work of this paper is to analyze and study these problems, which have mentioned above in order to provide practical value in some ways to improve the control and management level of sluice station. The work is carried out as follows:Firstly, In order to realize high reliability and security, all kinds of information and status must be get generally, exactly and timely, the technology of signal collection, transmitting and processing in sluice automatic control system is discussed, the methods of flow rate measurement are also discussed in detail,Secondly, the system design principle, structure used generally in sluice station is given in this paper; In addition, sluice control method and the network safety are also discussed.Thirdly, this paper studies some problems in the PLC network including communication methods, PLC network topologic structure and protocols in subnet. It also studies the communication between PLC and IPC.Finally, the factories that may lower system’s reliability are studied and the measures that are used to enhance system’s reliability are discussed in this paper.更多还原