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여창모(Changmo Yeo),이현오(Hyunoh Lee),문두환(Duhwan Mun) 대한기계학회 2021 대한기계학회 춘추학술대회 Vol.2021 No.11
Plant 3D CAD models are used for various purposes during the life cycle of a plant construction project. Various organizations such as EPC companies, equipment manufacturers, and ordering companies participate in the plant construction project. And they share design data in different formats. In the process of exchanging design data, a procedure for exchanging or sharing inappropriate information is performed, resulting in loss of time and money. To prevent this, in the field, a neutral model is used for the efficiency of design information exchange between different organizations. In this study, we propose a method of extracting the main data present in the large plant 3D CAD data input into Autodesk Navisworks and converting it into a neutral model.
형상 유사도 기반 피팅 검색을 위한 AutoCAD Plant 3D 플러그인 타입 시스템 개발
여창모(Changmo Yeo),김형기(Hyungki Kim),박찬석(Chanseok Park),김병철(Byung Chul Kim),문두환(Duhwan Mun),한순흥(Soonhung Han) (사)한국CDE학회 2018 한국CDE학회 논문집 Vol.23 No.2
Aged process plants have typically different configurations from those in the as-built status and thus 3D CAD models for the aged process plant have often been outdated due to the difficulty of data update activities. This situation disturbs the efficient and safe operation and maintenance of aged process plants. As a solution to this problem, 3D CAD models in the as-operated status are reversely generated from point cloud obtained using a laser scanning device. 3D modeling with a point cloud in a plant 3D CAD system needs retrieving catalogs for equipment and materials and placing them in 3D dimensional design space. To accomplish this, this study designs an AutoCAD Plant 3D-based plug-in type system for the shape similarity-based fitting retrieval and implements it according the design.
STL 형식의 3D 메쉬 모델을 OBJ 형식으로 변환하는 시스템 개발
여창모(Changmo Yeo),박찬석(Chanseok Park),문두환(Duhwan Mun) 한국기계가공학회 2018 한국기계가공학회지 Vol.17 No.3
The 3D mesh model is used in various fields, such as virtual reality, shape-based searching, 3D simulation, reverse engineering, 3D printing, and laser scanning. There are various formats for the 3D mesh model, but STL and OBJ are the most typical. Since application systems support different 3D mesh formats, developing technology for converting 3D mesh models from one format into another is necessary to ensure data interoperability among systems. In this paper, we propose a method to convert a 3D mesh model in STL format into the OBJ format. We performed the basic design of the conversion system and developed a prototype, then verified the proposed method by experimentally converting an STL file into an OBJ file for test cases using this prototype.