Research On Application Of Data Acquisition Based On DGPS

Since the first GNSS systems(GPS)came out,the satellite positioning technology has played a critical role in the sphere of production and research.Precise capability of position is the most essential requirements.However,because of various interference factors,there will be certain error using satellite signals directly.At present,the current positioning accuracy of civil receiver is up to around 10 meters,which can meet the needs of ordinary users,but can't meet the requirements of high precision application areas.In order to satisfy people's demand for high accuracy positioning,DGPS arises at the right moment.The current application research of navigation mainly concentrated on two aspects: DGPS data transmission and data processing.Taking DGPS data as the research object,through the analysis of the data format RTCM V3.2 agreement,the data of the DGPS system have been analyzed;through the analysis of various common coordinate systems,the space rectangular coordinate system have been obtained.A 3D coordinate recorder based on DGPS is designed.The recorder apply to the sphere of production,with independent form with flat for the horizontal plane and Cartesian spa.The recorder can achieve 3D coordinate recorder of the object within the coordinate system.Based on the practical application and demand,this paper focuses on the acquisition and processing of DGPS data and coordinate calculation.The data transmission between the base station and the mobile station is designed.The calculation of the 3D coordinates and the storage of the data and the feedback information are achieved.The design of the system hardware consists of the recorder and digital radio station.The design of the system software consists of the acquisition and preprocessing of the DGPS data and the coordinate transformation involved in the DGPS data application.Finally,the total station is used to calibrate the 3D coordinate metrical accuracy of the recorder.The test results show that the recorder can reach the horizontal accuracy of ±2cm and the vertical accuracy of±3 cm.It is used to test the coal volume in QingShui River Power Plant of Guizhou Province,which can meet the requirements of measurement and realize the real-time location of the recorders coordinates.