Journal of the Computational Structural Engineering Institute of Korea (한국전산구조공학회논문집)

Computational Structural Engineering Institute of Korea (한국전산구조공학회)
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Development of Unique Naming Algorithm for 3D Straight Bridge Model Using Object Identification

3차원 직선교 모델 객체의 인식을 통한 고유 명칭부여 알고리즘 개발

  • Park, Junwon (School of Civil & Environmental Engineering, Yonsei University) ;
  • Park, Sang Il (School of Civil & Environmental Engineering, Yonsei University) ;
  • Kim, Bong-Geun (Division of R&D Center, Taesung S&I) ;
  • Yoon, Young-Cheol (Division of Civil Engineering, Myongji Collage) ;
  • Lee, Sang-Ho (School of Civil & Environmental Engineering, Yonsei University)
  • Received : 2014.11.14
  • Accepted : 2014.11.26
  • Published : 2014.12.31
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Abstract

In this study, we present an algorithm that conducts an unique naming process for the bridge object through the solid object identification focused on 3D straight bridge model. For the recognition of 3D objects, the numerical algorithm utilizes centroid point, and solid object on the local coordination system. It classifies the object feature set by classifying the objects and members based on the bridge direction. By doing so, unique names, which contain the information about span, members and order of the object, were determined and the suitability of this naming algorithm was examined through a truss bridge model and a bridge model with different coordinate systems. Also, the naming process based on the object feature set was carried out for the real 3D bridge model and then was applied to the module on local server and mobile device for real bridge inspection work. From the comparison of the developed naming algorithm based on object identification and the conventional one based on field inspection, it was shown that the conventional field inspection work can be effectively improved.

본 연구에서는 3차원 직선교 모델의 객체인식을 통해 각 객체별 고유 명칭을 부여하는 알고리즘을 제시한다. 3차원 객체의 수치적 인식을 위해 국부 좌표계 상의 솔리드 객체 도심 좌표를 활용하였으며, 객체의 분류, 부재의 구분, 교량 방향 인식 등을 수행하여 객체특성집합을 정의하였다. 이를 통해 경간정보, 부재정보, 객체의 순서정보를 포함한 객체별 고유 명칭을 부여하였고, 트러스 교량 모델 및 서로 다른 좌표계를 갖는 교량모델에 적용하여 각 부재별 객체특성집합을 이용한 명칭의 부여의 적합성을 검토하였다. 또한 실제 교량의 3차원 모델을 대상으로 제안된 방법론을 통해 객체특성집합 정의 및 객체별 명칭을 부여하였고, 이를 매개로 모바일 장치용 모듈과 로컬 서버용 모듈에 적용하였다. 객체인식을 통한 명칭부여 알고리즘을 활용한 방법과 기존 현장점검 방식의 비교를 통해 기존 유지관리 현장점검 업무를 효과적으로 개선할 수 있음을 확인하였다.

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