Abstract：The urban drainage monitoring method and the online monitoring system are discussed.The distributing status and monitoring request of draining water pipe network in Zhenjiang are introduced,including sewage pumping station,system composition,data processing of real-time monitor and automatic control system.The wireless transmission mode of monitoring data,the characteristics of GPRS wireless transmission system,the selection of equipment online monitoring instruments,and the real-time display principle of the monitoring system data are also introduced.Through the analysis,it shows that GPRS is particularly well suited to the communication between those data collected in monitoring points and center computer.The system of real-time monitor and the automatic control may realize the observation for sewage disposal data all day and find out the real-time changes of data,for example,pH value,the flux,and water level.The observation result indicate that the illegal discharge of sewage with strong acid and alkali into the urban sewage pipe network,the pumping station,as well as sewage treatment plant’s facility will affect the sewage treatment micro-organism activeness and reduce the sewage treatment ability.
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