Design And Application Of Real-time Monitoring System For Geohazard Based On GNSS

The frequent occurrence of geohazard has been a serious threat to people's safety and national development.In the past decade,statistically,there are more than 200,000 geohazard events in China,which caused over 10,000 casualties and 50 billion direct financial loss.Monitoring the geohazard plays a vital role on decreasing the above damages,while,there are still some urgent problems.On the one hand,the domestic monitoring had a low degree of automation.On the other hand,the existing geohazard monitoring method failed to take into account massive amounts of data processing problem in the case of a large number of monitoring stations,causing that it can only achieve a single or a few monitoring in practical applications.Regarding to these problems above,this thesis designs a real-time geohazard monitoring system based on GNSS.Here are the main contents:(1)The architecture of system was designed with the research of related theories and the analysis of system requirements;(2)A data acquisition program of geohazard was designed to achieve the full-automatic data collection according to the study of satellite relative positioning;(3)A distributed data system was designed to achieve mass data processing.In this system,the data transmission service based on non-blocking IO solved the problem of high concurrency,the data processing service based on distributed architecture realized real-time solution of mass data,the data storage service realized the high performance of storage,and the service container provided a running environment and resource interface for all services above;(4)A visualization platform was designed to realize the visual monitoring of geohazard.In summary,the collection of geohazard data was achieved by the satellite relative positioning and wireless communication,the geohazard data processing was achieved by the distributed data system,the monitoring of geohazard data was achieved by the visualization platform.These technologies contributed to the final realization of geohazard monitoring,with the full-automatic and real-time characteristics.At present,this system has been ran steadily in Wanzhou(Chongqing).The successful application of system indicates that the accuracy requirements of geohazard monitoring was met by the satellite relative positioning,the automatic monitoring and mass data processing under a large number of points were achieved by the system.