Error Check Method Considering Rotation and Deformation of Particle Patterns

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  • 139 粒子分布パターンの回転と変形を考慮したPTVのエラーチェック法
  • リュウシ ブンプ パターン ノ カイテン ト ヘンケイ オ コウリョ シタ PTV ノ エラー チェックホウ

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Abstract

In order to evaluate similarity between two particle distribution patterns in PTV, it is of importance to consider the pattern distortions during a short time interval. A method in this paper detects deformations of the particle patterns after estimating particle pairs between two sequential pictures. Shears and rotations in the flow can be determined by examining the estimated deformations, and erroneous particle pairs can be detected simultaneously. By repeatedly applying the screening process, both a number of obtained vectors and reliability can be increased. The processing time increases a little by adding the process, but it would be far less than an approach to determine the deformations first.

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