【作者】 俞梅；

【导师】 唐明新；

【作者基本信息】 大连交通大学 ， 控制理论与控制工程， 2007， 硕士

【摘要】 循环水在工业发展中起着举足轻重的作用，可以起到提高生产效率，降低运行成本，降低水资源能耗，保护环境，提高综合效益等作用。传统加药的方法是采用常规仪器仪表控制，存在控制难度大，控制不够精确等缺点，所以本文采用基于现场总线技术的低成本现场总线控制系统来监控和管理整个实验装置的运行过程。本文针对整个循环水动态模拟装置现场总线控制系统的设计与实现进行了明确的概述和详细的说明。整个系统具有管理和监控功能，下位机系统可以实现对入口温度的级联控制，对循环流量的控制以及对实验装置的各个泵、阀的控制。上位机操作站可以实现管理功能，如历史曲线的显示，报表的生成，人机交互等等功能。“集中管理、分散控制”是这种低成本现场总线控制系统的主要特点。本设计的特点是：首先，采用基于LabVIEW DSC的监控软件，以图形语言的形式编写程序，使编程更简单，节省开发时间，画面更逼真；其次，下位机采用自行开发的低成本智能测控组件，实现实时数据的采集和系统的自动控制功能，可以降低成本；最后，在上下位机的数据通讯上采用先进的OPC技术，可以显著地增强过程控制领域中的控制系统、现场设备、管理应用程序之间的互操作性，提高了系统的开放性。整个系统具有安全可靠、功能完善、操作简便、性价比高等优点。整个系统的在实验室进行应用组态调试，数据传输快，画面切换速度快，效果非常明显。实践证明，这种低成本现场总线控制系统非常适用于中小型过程控制系统。更多还原

【Abstract】 Circulating water plays an important role in industrial development, it has many functions, such as it can improve efficiency of production, reducing the cost and the energy consumption of water resources, protecting the environment and increasing the integrated effectiveness. The traditional method of dosing is using conventional instrumentation to control, but this method is very difficult to control and the control is not precise. Therefore, this paper uses the low cost fieldbus control system based on fieldbus technology to control and manage the process of whole experiment.The paper detailedly expounds the design and realization of fieldbus control system of water dynamic model equipment. The entire system has functions of management and control, the lower computer can carry out cascade control of the input temperature, the control of cycle flow and all pump, valve of experiment. The upper computer operation can achieve the managing functions, such as the show of historical curve, the generation of report, the interaction of the man and machine."Centralized management, decentralized control," is the characteristic of the low cost fieldbus control system. The characteristics of the design: first, it adopts the monitoring software based on LabVIEW DSC, which is program for graphic language, making program more simply, saving development time and more realistic interaction; secondly, the lower computer is adopt the self-developed, low-cost monitoring and control intelligent component, which carry out the acquisition of real-time data and the control function of system and can reduce the cost. Finally, the OPC technology is use to data communications between the master and the slaver computer. It can significantly enhance the operation among the control systems, devices and the process between management applications, so it can improve the openness of the system. The whole system is safe and reliable, it has perfect functions, easy operation, lower cost.The entire system is debugged configuration application in laboratory, the data transmission is fast, the speed of switching of interface is fast, the effect is very well. Through the practice, it has proved that the low-cost fieldbus control system is very applicable to small process control system.更多还原