基于无人机PPK技术在免像控条件下山区光伏地形图的生产

Production of photovoltaic topographic maps in mountainous areas based on image-free control UAV PPK technology

针对光伏场区高差大、部分区域植被覆盖、通信信号弱的特点,本文提出了一种基于动态后处理技术(PPK)在免像控条件下航测光伏地形图生产的方法。该方法首先在免像控的条件下对航测获取的无人机影像定位测姿系统(POS)数据和点云数据进行PPK解算;然后利用点云后处理、影像空中三角测量、数字微分纠正等技术生成高精度数字高程模型(DEM)和数字正射影像(DOM)成果;最后利用DEM和DOM成果构建三维模型,实现地形图生产。利用两个典型应用实例,验证了该方法可完全满足光伏地形图的精度要求。

In view of the characteristics of large height difference,vegetation coverage in some areas,and weak communication signals in the photovoltaic field area,this paper proposed a method of producing aerial photovoltaic topographic maps based on image-free control post processed kinematic(PPK) technology.This method firstly solved position and orientation system(POS) data and point cloud data of unmanned aerial vehicle(UAV) images obtained based on image-free control PPK Technology,and then high-precision digital elevation model(DEM) and digital orthophoto map(DOM) were generated by point cloud post-processing,aerial triangulation of images,and digital differential correction.Finally,DEM and DOM results were utilized to build three-dimensional(3D) models and produce topographic maps.Through two typical application examples,it is proven that the method can fully meet the accuracy requirements of photovoltaic topographic maps.