Korean Journal of Construction Engineering and Management (한국건설관리학회논문집)

Korea Institute of Construction Engineering and Management (한국건설관리학회)
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A Vision-based Pipe Support Displacement Measurement Method Using Moire Patterns

모아레 현상을 이용한 영상기반 파이프 서포트 변위측정 방법

  • 박준범 (인하대학교 건축공학과) ;
  • 박세미 (인하대학교 건축공학과) ;
  • 김재현 (인하대학교 건축공학과) ;
  • 김정렬 (인하대학교 건축공학과)
  • Received : 2021.09.29
  • Accepted : 2021.12.14
  • Published : 2022.01.31
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Abstract

It is very important to measure the displacement of a structure to evaluate the safety of the structure. This study shows a methodology to measure the displacement to determine the stability of a structure when it is damaged by loads. The methodology used Moiré's phenomenon and was verified through experiments. The experiments utilized pipes to simulate the pipe supports in the construction site and measured the vertical displacement of the Moiré interference patterns according to the horizontal displacement of the pipes. Experiments confirmed that the linear relationship between horizontal displacement of pipes and vertical displacement of Moiré patterns and derive a relational expression. In conclusion, the methodology presented in this work allows us to simultaneously measure a number of vertical members' displacements regardless of distance and determine the safety of the structure.

본 연구는 구조물이 하중과 외부요인으로부터 피해를 받을 경우 구조물의 안정성을 판단하기 위해서 발생하는 변위를 측정하는 방법론을 제시하고 실험을 통한 검증을 보여준다. 변위측정은 모아레의 원리를 이용 하였으며 이를 통해 구조물의 미세한 변위를 증폭하여 관찰 할 수 있다. 실험은 실제 현장의 파이프 서포트와 동일한 지름의 파이프를 사용하였으며 파이프가 수평으로 움직인다는 가정하에 파이프의 수평 변위에 따른 모아레 간섭무늬의 수직 변위를 측정하였다. 실험 결과 파이프의 수평 변위와 간섭무늬의 수직 변위의 선형 관계를 확인하고 관계식을 도출하였다. 추가적으로 카메라를 이용한 방법론을 적용하기 위해 수직부재와 카메라 사이의 거리에 따른 간섭무늬 변위의 관계식을 도출하여 카메라의 위치에 상관없이 방법론을 적용할 수 있게 하였다. 결론적으로 본 연구에서 제시한 방법론을 통해 카메라를 이용하여 거리에 상관없이 다수의 수직부재 변위를 동시에 측정하고 구조물의 안전성을 판단하여 붕괴를 감지할 수 있다.

Keywords

Acknowledgement

본 연구는 국토교통부/국토교통과학기술진흥원의 지원으로 수행되었음(21CTAP-C152144-03).

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