Development of Accuracy Evaluation System for Curved Shell Plate by Laser Scanner

Hiekata, Kazuo; Yamato, Hiroyuki; Enomoto, Masaya; Oida, Yoshiaki; Furukawa, Yoshiyuki; Makino, Yuki; Sugihiro, Taketoshi

doi:10.1007/978-0-85729-024-3_6

Cited by 5 publications

(4 citation statements)

References 3 publications

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“…However, the CMM device needs to be operated by workers and its measurement efficiency is very low. Hiekata et al 4 used a laser tracker to measure a curved shell plate. However, the quantity of scanned points and the use of reflectors would require a very high level of manual effort.…”

Section: Introductionmentioning

confidence: 99%

An onsite inspection sensor for the formation of hull plates based on active binocular stereovision

Wang

Zhen

et al. 2014

Proceedings of the Institution of Mechanical Engineers, Part B:

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Nowadays, the inspection of formed hull plates is still more dependent on wooden templates. The method based on wooden templates is imprecise, inefficiency and costly. In this article, an alternate measurement sensor for onsite inspection of formed hull plates is developed. The sensor can obtain accurate quantitative result with high efficiency. The case study demonstrated that the sensor could substitute wooden templates to inspect formed hull plates in workshop.

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Section: Introductionmentioning

confidence: 99%

An onsite inspection sensor for the formation of hull plates based on active binocular stereovision

Wang

Zhen

et al. 2014

Proceedings of the Institution of Mechanical Engineers, Part B:

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“…As an application of laser scanners to shipbuilding, an accuracy evaluation system for ship components was developed at the University of Tokyo [2,3]. The procedure is as follows: (Step 1) Obtain the point cloud data by scanning the component using the noncontact 3D laser scanner.…”

Section: Introductionmentioning

confidence: 99%

Efficient point cloud data processing in shipbuilding: Reformative component extraction method and registration method

Sun

Hiekata

Yamato

et al. 2014

Journal of Computational Design and Engineering

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To survive in the current shipbuilding industry, it is of vital importance for shipyards to have the ship components' accuracy evaluated efficiently during most of the manufacturing steps. Evaluating components' accuracy by comparing each component's point cloud data scanned by laser scanners and the ship's design data formatted in CAD cannot be processed efficiently when (1) extract components from point cloud data include irregular obstacles endogenously, or when (2) registration of the two data sets have no clear direction setting. This paper presents reformative point cloud data processing methods to solve these problems. K-d tree construction of the point cloud data fastens a neighbor searching of each point. Region growing method performed on the neighbor points of the seed point extracts the continuous part of the component, while curved surface fitting and B-spline curved line fitting at the edge of the continuous part recognize the neighbor domains of the same component divided by obstacles' shadows. The ICP (Iterative Closest Point) algorithm conducts a registration of the two sets of data after the proper registration's direction is decided by principal component analysis. By experiments conducted at the shipyard, 200 curved shell plates are extracted from the scanned point cloud data, and registrations are conducted between them and the designed CAD data using the proposed methods for an accuracy evaluation. Results show that the methods proposed in this paper support the accuracy evaluation targeted point cloud data processing efficiently in practice.

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“…그러나 곡부재의 경우는 내부 곡률에 따라서 오차 가 발생할 수 있으므로, 부재 곡면 전체가 관심대상이다. 상대 적으로 계측포인트가 많아서 최근에 3차원 레이저 스캐너(3D laser scanner) (Hiekata et al, 2011;Li et al, 2016) 및 사진계측시 스템(Photogrammetry) (Wang et al, 2016)이 주로 활용되고 있다.…”

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“…곡부재는 가공 완성 후, 일부 면을 절단해야 하는데, 절단 길이를 최소화 하기 위해 제한 조건을 고려한 곡 부재 정합 방법이 사용되었다 (Park et al, 2007). (Jung et al, 2009;Hiekata et al, 2011), 허용 공차를 고려해서 작업자가 직관적으로 판단할 수 있도록 100% 에 가까운 것이 완성도가 높게 나오도록 수치적으로 표현했다 (Park et al, 2016).…”

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Fabrication Assessment Method for Dimensional Quality Management of Curved Plates in Shipbuilding and Offshore Structures

Kwon¹,

Lee²

2018

J. Ocean Eng. Technol.

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Development of Accuracy Evaluation System for Curved Shell Plate by Laser Scanner

Cited by 5 publications

References 3 publications

An onsite inspection sensor for the formation of hull plates based on active binocular stereovision

An onsite inspection sensor for the formation of hull plates based on active binocular stereovision

Efficient point cloud data processing in shipbuilding: Reformative component extraction method and registration method

Fabrication Assessment Method for Dimensional Quality Management of Curved Plates in Shipbuilding and Offshore Structures

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