| As the continuous growth of urban area, the traditional operation of the pipeline networks for water supply which controlled mainly by manual coordination is no longer to meet the need of the current water supply system. Therefore, to intensify the capability of remote data acquisition and monitor in the urban pipeline networks is a great and far-reaching significance to the development of a whole city. In order to improve the quality of water supply in a city and raise the efficiency of the operation of water supply system, use the computer-based monitor and control system for urban water supply networks is an inevitable trend for the development. Take into account the management characteristics of water pipeline networks, this paper puts forward to establish a system by using GPRS wireless terminal for remote data acquisition and transmission based on GPRS networks and Internet technology.As the technology 2.5G of transition from 2G to 3G, GPRS (General Packet Radio Service) becomes popular in industrial automatic domain. This article firstly, makes an analysis on the characteristics of GPRS wireless system and its application in remote monitor system, and then it offers an overall scheme in combination with the characteristics of monitor and control system for the water supply networks. The scheme includes three parts: control center, remote terminal and remote data communication. The control center monitors and controls all measuring points of a water supply station, maintains the operation files. The remote terminal monitors and measures real time data within the station. The data communication is for data transmission between the remote terminal and the control center. This paper expounds in detail the function and design of GPRS remote terminal, principle and application of the data communication, and designs reliable supply circuit which uses engines in pipelines for supply power source and makes super-capacitors and storage batteries for spare power source. |
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