Landslide Monitoring Technology And System Development Based On The Combination Of The Beidou/Multi Source Sensor

China is at the litersection of the ring Pacific tectonic belt and the Himalaya tectonic belt with complex geological enviromment,many types of geological disasters and frequent occurrence.In addition to earthquakes,two kinds of geological disasters,such as landslides and debris flows,are the most common and extremely destructive.Because of its sudden,hidden and dangerous characteristics,it causes huge property losses and casualties every year,hindering the modenization of the country and affecting the production and life of the people,Landslides and debris flows are eaused by a variety of factors,and the mechanism is complex.A multi technology application technology is needed to monitor the landslide and debris flow.And the problem of slope stability caused by human activities is a bot and difficult problem in the construction of contemporary engineering.In view of the current geological hazards,a low cost and efficient monitoring technique is urgently needed to carry out high precisiom monitoring.With the modernization of GPS system,the service recovery and modem ization update of GLONASS system,the further development of Galileo system and Bdidou satellite navitgation system in China.GNSS technology began to merge into the multi constellaation system.In this paper,Beidou real-time high-precision positioning technology is applied to monitor landslides.The prinples theoretical models and technical characteristies of Beidou real-time monitoring technology are expounded.The performance of three kinds of precision positioning technology in landslide monitoring is analyzed,and the single sysiem and combined system are compared.The accuracy and reliability of Beidou sytem,applied to landslide monitoring are verified.At the same time,according to the charactewristics of Landslide Evoltution,the applicability of the two technologies of PPP and RTK in different stages of landlslides is analyzed in deptth The precision and reliability of all surface displacement monitoring sensors are verified by multi sensor combination monitoring.Finally,a real-time laudslide monitoring system based on the Beidou satellite navigation system is developed.The system includes the self-developed monitoring receiver,data processing software,and the external construction integration scheme.The reliability and accuracy of the landslide demonstration area are verified by the practical application of the landslide demonstration area.Considering the commercialized cloud platform and optimized hardware design,it has achieved low cost and is of great significance for Beidou application in the field of landslide monitoring.