Study On Remote Real-time Monitoring And Control System Based On The Internet

In recent years, the rapid development of network technology Especially with the development of the Internet technologies with TCP/IP as the leading role, remote monitoring network has been supplied a more profound technological foundation.The Computer's Remote Monitoring System based on B/S model which combines the traditional remote monitoring system and Web technology attracts more and more attention on research and development. Based on the development of Internet technology, the thorough study of TCP/IP structure and relative technologies, the paper makes a deep research on the key technology of the real-time remote monitoring and control system and design a real-time monitoring and control system based on B/S model according to the comparison of different software modes. Among them, the design of a Web-based monitoring and control project, the integration of the Infranet network and Internet/Intranet network, the real-time data dynamic exchange and the research of real-time character and network security of the remote monitoring and control system are included. Based on the real-time remote monitoring and control system, an ActiveX control(including WinSock control)used in remote temperature monitering and control system is designed to realize the functions such as configuration of temperature status parameter ,history inquiry and real-time remote monitoring and control.In order to realize the real-time data dynamic exchange, some methods to improve real-time capability of B/S-based remote monitoring and control system are analyzed and studied in this paper. Because of the differences of the request and characteristics between Internet/Intranet technology and Infranet, how to realize the integration of the Infranet and Internet/Intranet was analyzed and studied. Data dynamic exchange and real-time question were introduced and analyzed, several dynamic exchange technologies were mainly compared, and the use of ActiveX technology in the remote monitoring and control system was analyzed in details.This paper also studies the real-time characteristics of the remote monitoring and control system, and puts forward some methods to improve real-time capability of the system depending on existing conditions. In the design of the remote monitoring control system, the remote data communication is realized by two methods (Socket technology and database technology) according to the different character of real-time data and OPC technology is used for data acquisition from local control unit. Network security occupies a very important position in the system. The paper introduces the basic network security and presents some methods to make Internet communication safer in B/S model.