Research On Key Technology Of Data Acquisition And Processing For UAV Remote Sensing System

In this paper, the author takes the centimeter level resolution image data obtained by the UAV remote sensing system produce large scale topographic map as the research background, focusing on discuss the theory、methods of UAV remote sensing system for data acquisition and processing, mainly around the UAV platform selection、 sensor integration、data acquisition、data quality evaluation、data processing、 oblique Photogrammetry carry out experiments and analysis, Obtain valuable experimental conclusions for engineering application.The main experimental conclusions are as follows:1.The 0.05 meter resolution image data obtained by the UAV remote sensing system in experimental area, when the photograph control point meet the requirements of the specification, The image data is processed finished using Digital photogrammetry software, the plane accuracy and height accuracy can not meet accuracy requirements of 1:500 scale topographic map production.2. The 0.1 meter resolution image data and 0.2 meter resolution image data in experimental area obtained by the UAV remote sensing system, when the photograph control point meet the requirements of the specification, The image data is processed finished using Digital photogrammetry software, the plane accuracy and height accuracy can meet accuracy requirements of 1:1000 scale and 1:2000 scale topographic map production.The main innovation points are as follows:1. The UAV flight platform and sensor selection parameters are determined by research on Integration for UAV aerodynamic design theory and photogrammetry theory; Using Relationship of image resolution、mapping scale、pixel displacement、 cruise speed and camera’s exposure time determine The UAV flight platform and sensor selection parameters,and demonstrate parameters is correct using the theory of Reynolds number. The key technologies of UAV platform, flight control system, the physical integration between sensors, the logical integration of sensors, the electromagnetic compatibility of sensors, the time synchronization of sensors are solved.2. A set of scientific and reasonable evaluation index system of UAV aerial photography quality is summarized and sorted out, on this basis, the data quality checking software for UAV remote sensing system is developed, the difficult of data quality checking in the field is solved. Through the research data acquisition of UAV remote sensing system, constructed the data quality evaluation index system and evaluation process on the basis of analyzing the data type of UAV acquisition, designed quality evaluation software module and function and developed software with the corresponding quality check function.3. The method for construction of three-dimensional ground model is proposed based on UAV remote sensing system platform carry single camera、three cameras、 five cameras carry out oblique photogrammetry. after the centimeter level resolution oblique image data obtained by oblique camera are processed by image correction, combined adjustment, based on Image matching technology generate ultra high density point cloud, through the point cloud to build TIN model, digital surface model is builded by TIN, three-dimensional ground model is constructed using Texture mapping technique based on digital surface model.