【作者】 刘海洋； 王学良； 李丽慧； 涂新斌； 王彦兵； 廖小辉； 张路青；

【Author】 LIU Haiyang;WANG Xueliang;LI Lihui;TU Xinbin;WANG Yanbing;LIAO Xiaohui;ZHANG Luqing;Institute of Geology and Geophysics,Chinese Academy of Sciences;University of Chinese Academy of Sciences;State Power Economic Research Institute;Quzhou University;

【机构】 中国科学院地质与地球物理研究所； 中国科学院大学； 国网北京经济技术研究院； 衢州学院；

【摘要】 无人机作为新兴的地理信息获取方法,其应用范围及数据精度受到广泛关注。相比于专业摄影测量的固定翼无人机及大型多旋翼无人机,小型四旋翼无人机对单体灾害或小区域进行地形测量,具有更灵活、可操作性更强、成本更低等优势。本文针对崩塌灾害调查工作环境的特殊性,研究了小型四旋翼无人机在无法布置控制点对数据进行优化的条件下,航拍高度和镜头方向对无人机数据的相对精度的影响。研究结果显示:(1)大疆精灵三系列无人机在缺少实地测量数据对无人机数据进行修正优化时,航高从150m下降到90m可使数据的水平精度提高63%,垂向精度提高7%;保持无人机的拍摄镜头垂直向下,在90~150m的航高范围内可以使数据的水平精度提高15%~69%,垂向精度提高6%~9%;(2)结合山东淄博的崩塌调查案例,利用无人机获取了崩塌地形数据,借助Rockyfor3D软件进行崩塌运动的三维数值模拟分析,得到崩塌将威胁电网线路及公路的安全,相关结论对于崩塌灾害的防治工作,有一定的指导意义。更多还原

【Abstract】 As a new method to obtain geographic information,UAV(unmanned aerial vehicle) has attracted a lot of attention.Compared with professional photogrammetry fixed wing UAV and large multi-rotor UAV,small quad-rotor wing UAV is more flexible,more maneuverable and more economical to survey the topographic of single disaster and micro-region.In allusion to the particularity of the working environment for rockfall survey,this article studied the influence of flight height and the angle of camera to the accuracy of data acquired by mini quadrotor UAV when it’s impossible to set GCPs(ground control points) in field to optimize the data.The results indicated that:(l)DJI phantom 3 UAV can improve the horizontal accuracy in 63%,vertical accuracy in 7%when decrease the flight height from 150 m to 90 m,and improve the horizontal accuracy inl5%~ 69%,vertical accuracy in 6%~9%when keeping the lens vertical.(2) In the context of a rockfall survey case in Shandong province Zibo City,author obtained the topographic data by UAV,then analyzed the 3-D numerical simulation of the rockfall movement utilizing Rockyfor3 D program,the result showing the rockfall movement will threat the power grid and road has certain significance for prevention and control work for rockfall disaster.更多还原