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)

DOI Web Site 被引用文献2件 参考文献15件

書誌事項

タイトル別名
  • Studies on Generating Free-Form Surfaces from High-Density Measured Point Data (1st Report)
  • 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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抄録

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.

収録刊行物

  • 精密工学会誌

    精密工学会誌 64 (1), 84-88, 1998

    公益社団法人 精密工学会

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