透過您的圖書館登入
IP:44.197.114.92
  • 期刊

沖積扇數值地形模型資料蒐集-無人飛行載具之系統設計與實作

DATA COLLECTION FROM A DEBRIS FAN FOR DTM RECONSTRUCTION: DESIGN AND IMPLEMENTATION OF A UAV SYSTEM

摘要


本研究提出利用無人飛行載具(Unmanned Aerial Vehicle, UAV)輔助沖積扇數值地形模型資料蒐集之方法,並藉由探討沖積扇的各項特性,設計出一符合沖積扇數值地形模型資料蒐集的無人飛行載具系統,並且擬定一套系統操作之流程。臺灣山區受地勢影響,易於河川交匯處產生沖積扇的堆積現象,若是沖積扇過度堆積,不但會對環境造成破壞,在颱風豪雨期間還可能會對附近或是下游居民造成威脅,因此相當需要逐年的監測與分析,而監測沖積扇最好的方式就是利用數值地形模型(Digital Terrain Model, DTM)的逐年建置並加以分析。因沖積扇位處高山地區、幅員廣大等特性,使得現有之蒐集資料的效率低且所耗費的成本也較高。因此,本研究嘗試導入UAV於沖積扇的數值地形模型建置,希望能藉UAV的低成本以及高可及性來提升沖積扇研究的可能性。此外,為提升DTM資料蒐集的效率,本研究亦針對沖積扇資料蒐集UAV系統擬定一套標準的作業流程,並以高雄荖濃溪的布堂布納斯沖積扇實地測試。資料蒐集的過程總共花費24個工作時,建置出的DTM模型具有0.28公尺的解析度,以及0.1公尺的誤差,測試結果顯示,利用本系統於沖積扇的數值地形模型建置確實具有高效率、低成本以及高品質的優勢。

並列摘要


This research presents the application of an unmanned aerial vehicle (UAV) for the reconstruction of a digital terrain model (DTM) of a debris fan. Through analysis of the properties of the debris fan, we designed a UAV system and the system workflow for data collection. A DTM comprises the essential information for landscape analysis and simulation. The current and most used DTM generating approaches are expensive and time consuming. Additionally, in some precipitous circumstances, safety issues are a concern. Therefore, we propose a framework that generates an imaged-based model because UAVs have the advantages of flexibility and cost in comparison to existing approaches. We have prototyped a UAV aircraft specifically for performing orthographic image capture and autonomous waypoint control. Field tests have been carried out on a debris fan that is located at the intersection of the Laonong River and Pu-tunpu- nas tributary in Kaohsiung, Taiwan. The data for the field test was collected over 24 man-hours. After the field test and data post processing, DTM was obtained with an estimated 0.1 meter error and 0.28 meter resolution. Our strategy is a relatively low-cost and timesaving approach to build a DTM in comparison to the results from LIDAR. A precision of 0.1m was achieved that meets the requirements of most DTM applications. The results of this study suggest a more efficient and applicable approach than the current approaches of DTM reconstruction.

並列關鍵字

UAV DTM debris fan

延伸閱讀