Research And Implementation On Remote Monitoring And Control System Based On Comet Technology

"Digital water" is based on spatial information, integrating of hydrological models, water service, and modern electronic communication technology, professional system platform. Information in the digital water data collection, transmission, storage, simulation and decision-making design patterns used in pumping stations and other remote monitoring information is current research focus. Use of multimedia technology, network and remote monitoring technology, we'll come up with "remote viewing" of management, pump operating conditions for achieving the visual real-time monitoring, effectively promote the production management level and pump station monitoring and scheduling is of great significance. Ajax Comet technology is built on the basis of improved technology, the key is to change the browser Pull data from a server-side practice, and Push data directly from the server to the browser. In this paper, with City Wuhan Drainage Pumping Station Remote Monitoring and Management System project for the background, in the study based on the principle of Comet technology, we designed a Web-based server Push model framework to achieve a long connection based on HTTP streaming with the B/S model, and bring into play in the design of remote monitoring system.The main research contents of this paper are the following aspects:(1) Combined with the actual subject of the drainage pumping station remote monitoring and management system, we have studied the developments and advancement of Comet technology and other related technologies, and it has been applied to the Remote Monitoring System for significance.(2) For pumping the remote information system requirements and functions of research and design, through detailed grasp of the information system user requirements, we have proposed a series of solutions, and the functions of various parts of the system was designed.Besides, structural model of information system solutions are given. (3) Detailed analysis based on the Comet technology application in monitoring the advantages of the system, we designed the B/S mode, Push Mode-based Comet server-side Web technology framework. The design of HTTP streaming real-time basis, is to establish a data channel and control channel, completing a server and client software design.(4) For the design framework, the system server and client functions were implemented in the server-side Web server functions primarily to achieve and real time database access, the client is mainly the release SVG graphics and JSP dynamic pages to achieve.(5) Having completed functional modules and running tests of system. We achieved corresponding performance testing according to the procedures in accordance with user requirements, instantaneity and security, etc.