基于等高线构建无人机航线的新型仿地飞行策略  

A new ground-like flight method based on contours to construct drone routes

作　　者：王炳乾 陈超 王华军[2] 陈建华[2] 唐侨 吴森 吴瑶 WANG Bingqian;CHEN Chao;WANG Huajun;CHEN Jianhua;TANG Qiao;WU Sen;WU Yao(Sichuan Institute of Geological Engineering Investigation Group Co.,Ltd.,Chengdu 610072,China;College of Geophysics,Chengdu University of Technology,Chengdu 610059,China)

机构地区：[1]四川省地质工程勘察院集团有限公司,四川成都610072 [2]成都理工大学地球物理学院,四川成都610059

出　　处：《测绘通报》2020年第11期104-107,115,共5页Bulletin of Surveying and Mapping

基　　金：国家科技重大专项(2016ZX05050005)。

摘　　要：建筑物墙面、悬崖或危岩等目标物的立面信息对于地物精细化建模、地灾调查、分析、评估及防治等具有非常重要的作用。传统倾斜摄影测量获取影像的方式缺乏对地物立面信息的详细描述,在地形落差较大的地区也存在因影像重叠率不同而建模失败的情况。仿地飞行策略在一定程度上解决了上述问题,但其对于突然的高度变化,不能满足精细化建模的要求。本文提出了一种基于等高线构建无人机航线的新型仿地飞行策略,该方法基于目标区域的DSM生成等高线,经等高线简化、偏移等处理完成无人机航线的设计。通过试验将该方法构建的模型成果与传统仿地飞行方法建模成果相比较。结果表明,本文提出的方法可将悬崖上的危岩等刻画得更加真实,且相对于传统仿地飞行垂直于高度变化方向的航线设计为平行于等高线的航飞路线,避免了频繁的高度变化,有益于延长无人机执行飞行任务的时间,因此是一种有效、实用的航飞路线设计方法。The upright surface information of targets such as building walls,cliffs or dangerous rocks plays a very important role in the fine modeling of objects and investigation,analysis,evaluation and prevention of geological disasters.The images obtained by traditional oblique photogrammetry lack a detailed description of the vertical surface information of the target,and in areas with large changes in height difference,modeling may fail due to different image overlap rates.The ground-like flight strategy solves the above problems to a certain extent,but for areas with sudden changes in altitude,it is often unable to meet the requirements of refined modeling.This paper proposes a new ground-like flight method based on contour lines to construct drone routes.This method generates contour lines based on the DSM of the target area,and completes the design of the drone route through contour simplification and offset.The model results constructed by this method are compared with the modeling results of the traditional ground-simulating flight method.The experimental results show that the method proposed in this paper is more realistic for portraying dangerous rocks on cliffs.Moreover,compared with the traditional ground-like flight method,the flight route designed in this paper avoids frequent altitude changes,which is beneficial to extend the time for the UAV performing flight tasks.Therefore,the new ground-like flight method based on contour lines to construct drone routes proposed in this paper is a very effective and practical flight route design method.

关 键 词：摄影测量 精细化建模 DSM 等高线 仿地飞行 

分 类 号：P237[天文地球—摄影测量与遥感]