Research On Geological Disaster Monitoring Based On GNSS

With the development of GNSS positioning technology, it has been widely used in the field of geological hazard monitoring. However, in the case of different geological disasters, how to determine the accuracy of the indicators, the development of high-precision GNSS data processing program, the applicability of GNSS-RTK technology, and other issues still exist some problems. In view of these problems, the project in the study of the relevant theory, based on the independent design and development of GNSS-RTK technology based on the geological disaster monitoring system, the main contents are as follows:(1) The important status and function of geological hazard monitoring in the national economic development are summarized. The current situation of research and development in the field of geological hazard monitoring at home and abroad is analyzed, and the gap between domestic and foreign is compared, and the main research direction of this project is put forward.(2) Satellite navigation and positioning theory, satellite signal and navigation message and other related theories are studied. In view of this project, the GNSS-RTK real-time dynamic positioning technology and the output of the satellite receiver are discussed.(3) Processing method of geological hazard monitoring signal. The two order autoregressive model is used to simulate the monitoring signal of geological hazards, using the Calman filter algorithm to automatically follow the nature of the signal and the nature of the recursive nature of the monitoring point data processing, make the data accuracy to further improve.(4) Development of the lower computer of geological hazard monitoring system. On the basis of studying the working principle of the satellite receiver, the characteristics of the interface and the communication protocol, the data acquisition terminal is designed with STM32, and the data is transmitted to the server through the related peripheral modules.(5) Develop PC software. After the research on the software architecture based on Java Web, determine the use of SSH architecture, Js and Ajax technology. Real time display monitoring point data and monitoring point displacement curve, as well as information about the weather. After the completion of the software development, the relevant test.In summary, through the lower machine to receive and deal with the geological disaster monitoring signal, data processing results show that in the horizontal direction of the positioning accuracy can reach mm level, the height of the positioning accuracy in the cm level. The processed data is then transmitted to the server, and the information of the display and the monitoring points in the host computer is online.