Development of Genetic Algorithm based 3D-PTV technique |
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Authors: | D H Doh D H Kim K R Cho Y B Cho W J Lee T Saga T Kobayashi |
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Institution: | 1. Division of Mechanical and Information Engineering, Korea Maritime University, Youngdo-ku, Dongsam-dong, 606-791, Busan, Korea 2. Institute of Industrial Science, The University of Tokyo, 4-6-1 Komaba, Meguro-ku, 153-8505, Tokyo, Japan
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Abstract: | A new 3D-PTV technique has been developed using GA (Genetic Algorithm). The measurement system consists of three CCD cameras,
Ar-ion laser, an image grabber and a host computer. One-to-one correspondences are made by taking advantage of the combinatorial
optimization of the genetic algorithm for the whole particles of the two images during the time interval of image frames.
Two fitness functions are introduced in order to enhance the correspondences of the particles. One is based on the concept
of continuum theory and the other one is based on the minimum error of threedimensional distance. Performance of the developed
algorithm is tested using a set of virtual images constructed by the use of LES data set on an impinging jet. The developed
3D-PTV system is successfully applied to the measurement of flow characteristics of the wake of a circular cylinder. |
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