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논문 기본 정보

자료유형
학술저널
저자정보
장문석 (충남대학교) 유원선 (충남대학교) 박창규 (전주비젼대학교) 김덕은 (삼인정보시스템)
저널정보
대한조선학회 대한조선학회 논문집 대한조선학회논문집 제55권 제1호(통권 제217호)
발행연도
2018.2
수록면
66 - 74 (9page)
DOI
10.3744/SNAK.2018.55.1.66

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초록· 키워드

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In order to evaluate the precision degree of the blocks on the dock, the shipyards recently started to use the point cloud approaches using the 3D scanners. However, they hesitate to use it due to the limited time, cost, and elaborative effects for the post-works. Although it is somewhat traditional instead, they have still used the electro-optical wave devices which have a characteristic of having less dense point set (usually 1 point per meter) around the contact section of two blocks. This paper tried to expand the usage of point sets. Our approach can estimate the rework time to weld between the Pre-Erected(PE) Block and Erected(ER) block as well as the precision of block construction. In detail, two algorithms were applied to increase the efficiency of estimation process. The first one is K-mean clustering algorithm which is used to separate only the related contact point set from others not related with welding sections. The second one is the Concave hull algorithm which also separates the inner point of the contact section used for the delayed outfitting and stiffeners section, and constructs the concave outline of contact section as the primary objects to estimate the rework time of welding. The main purpose of this paper is that the rework cost for welding is able to be obtained easily and precisely with the defective point set. The point set on the blocks’ outline are challenging to get the approximated mathematical curves, owing to the lots of orthogonal parts and lack of number of point. To solve this problems we compared the Radial based function-Multi-Layer(RBF-ML) and Akima interpolation method. Collecting the proposed methods, the paper suggested the noble point matching method for minimizing the rework time of block-welding on the dock, differently the previous approach which had paid the attention of only the degree of accuracy.

목차

1. 서론
2. 관련 연구 현황
3. 3점 정합 방법의 정의
4. 3점 정합 방법 구현 방안
5. 외각 측정 점 자동 획득
6. 정합면 곡선 형성 방법
7. 재작업 시수 예측
8. 결론
References

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UCI(KEPA) : I410-ECN-0101-2018-538-001764643