Studies on Generating Free-Form Surfaces from High-Density Measured Point Data (1st Report)
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- GOTOH Takayuki
- 正会員 旭川工業高等専門学校
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- TAKAYA Yasuhiro
- 正会員 大阪大学大学院工学研究科
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- MIYOSHI Takashi
- 正会員 大阪大学大学院工学研究科
Bibliographic Information
- Other Title
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- 高密度測定点データに基づく自由曲面生成法に関する研究 (第1報)
- 高密度測定点データに基づく自由曲面生成法に関する研究(第1報)境界高密度計測法と特徴領域抽出法の提案
- コウ ミツド ソクテイテン データ ニ モトズク ジユウ キョクメン セイセイ
- A Proposal of Boundary High-Density Measuring and Character-Area Extracting
- 境界高密度計測法と特徴領域抽出法の提案
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Abstract
The acquisition of profile data and the production of CAD models are key elements in the style design based on a master model. So the present studies aim to generate high-quality CAD models from high-density measured point data on a master model having character areas. This report deals with a new method to measure such a master model and a fitting method to generate free-form surfaces onto the high-density measured point data. A master model is measured with a non-contact 3-D digitizing system. A non-uniform cubic B-spline curve fits onto the measured point data on a measurement line. A non-uniform knot vector is obtained in the “equivalent curvature area dividing method.” Coons patches of C2 continuity are generated from the fitted B-spline curve as a boundary curve of patches. Twist vectors are calculated in the Adini method which utilizes adjacent patches. In the experiments, a high-accuracy CAD model fitted onto the measured point data on a master model. To get a high-quality CAD model, patches should be small in the character areas, so a new method is also proposed to extract character areas in the high-density measuring method.
Journal
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- Journal of the Japan Society for Precision Engineering
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Journal of the Japan Society for Precision Engineering 64 (1), 84-88, 1998
The Japan Society for Precision Engineering
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Keywords
Details 詳細情報について
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- CRID
- 1390282679740750208
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- NII Article ID
- 110001367923
- 10003573859
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- NII Book ID
- AN1003250X
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- ISSN
- 1882675X
- 09120289
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- NDL BIB ID
- 4379307
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- Data Source
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- JaLC
- NDL
- Crossref
- CiNii Articles
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- Abstract License Flag
- Disallowed