Journal of the Korean Society of Surveying, Geodesy, Photogrammetry and Cartography (한국측량학회지)

Korean Society of Surveying, Geodesy, Photogrammetry and Cartography (한국측량학회)
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Electric Power Line Dips Measurement Using Drone-based Photogrammetric Techniques

드론 기반 사진측량기법을 활용한 고압 송전선의 처짐량 측정

  • Kim, Yu Jong (Dept. of Quality Management, Sampyo EM) ;
  • Oh, Jae Hong (Dept. of Civil Engineering, Chonnam National University) ;
  • Lee, Chang No (Dept. of Civil Engineering, Seoul National University of Science and Technology)
  • Received : 2017.09.27
  • Accepted : 2017.12.13
  • Published : 2017.12.31
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Abstract

High voltage power transmission lines have been to keep the proper dip for maintenance. Powerline dips at a random point are conventionally measured by the direct or indirect observation but it is not only unsafe but labor-intensive. Therefore in this study we applied the photogrammetric technique to remotely measure the powerline dips. Since it is not easy to extract conjugate points from linear powerlines, we exploited the epipolar lines acrossing the powerlines for 3D mapping of the powerlines and dip measurements. The vertical mapping accuracy estimated at two field-surveyed power line points was 15~16cm that are within 5% of deflection at the points and less than 3% of the powerline dip.

고압 송전선은 전선을 느슨하게 가선하여 약간의 이도를 유지하도록 되어있다. 현재 송전선의 이도를 측정하는 방법은 직접 측량에 의존하고 있고 비교적 정확한 값을 얻을 수 있지만, 송전탑에 직접 승탑하거나 가까이 접근해야하는 위험성 및 어려움이 있다. 본 연구에서는 대상체에 접근하지 않고 3차원 측정을 수행하기 위해 저가의 드론을 활용한 항공사진측량 기법을 사용하였다. 선형 구조물인 송전선은 매핑을 위한 특징점이 존재하지 않기 때문에, 송전선의 방향과 수직이 되도록 에피폴라 라인을 형성하여 입체 사진 처리기법을 통해 송전선의 3차원 매핑을 수행하고, 송전선의 처짐량을 도출하였다. 사진측량기법에 의한 측정 결과 무타겟 토탈스테이션을 사용하여 직접 측정한 두 지점의 송전선의 처짐량과 비교하였을 때 수직 정확도가 15~16cm로 파악되었고 이는 해당 지점 처짐량 대비 5% 이내 및 대상 송전선 이도량의 3% 이내에 해당하는 값이다.

Keywords

References

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