Design And Implementation Of High-precision Monitoring System Based On Beidou Navigation

In recent years,kinds of natural disasters caused by displacement and deformation have occurred,such as landslides,road slope collapse,dam settlement,building settlement and deformation,etc.,witch takes great threat to human's life and property security.Traditional methods are not timely and costly to these displacement and deformation disasters.with satellite navigation technology introducing into monitoring field can provides advantages of high precision,all-weather,automatic,and it quickly become an important method of displacement and deformation monitoring.China's beidou satellite navigation system(BDS)have coverage in the asia-pacific region and provide positioning,navigation,timing and short message communication service ability.Therefore,research of high precision monitoring application based on beidou has urgent realistic demand and has implemented conditions.This thesis is aimed at requirements of our country's independent high-precision monitoring system based on BDS,in-depth analysis the special needs of monitoring application by current monitoring system,such as precision,reliability,availability,and integrity.This thesis discussed the observation model,error sources and correction methods related to high precision positioning of BDS.the carrier phase difference carrier,phase smoothing pseudorange and other key technology has passed through detailed discussion and research,and form a set of high precision monitoring system based on BDS with independent property rights based on above key technology,this system has carried out demonstration application.main content as follows:1.In this paper,a high precision positioning method of BDS is studied,According to the pseudorange difference,a method of carrier phase smoothing pseudorange based on kalman filter is proposed.It can meet the application requirements of multi Epoch and dynamic conditions.According to the carrier phase difference,to achieve a rapid solution of LAMBDA algorithm of ambiguity resolution based on the calculation method of reducing the fixed integer ambiguity of epoch need,to achieve a stable millimeter precision position solution.2.The development of the high precision monitoring system includes a monitoringstation system,data processing and early warning software,the system used for the deployment of Guangba expressway has a slope landslide risk,get a good demonstration effect.