ステレオ画像法による粒子径・速度の同時計測 Measurement of Velocity and Size of Particles by Using Stereo-Imaging Technique

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A direct-imaging technique for measuring size and velocity of solid/liquid particles dispersed in two-phase flows was developed. The depth-of-focus effect that has been imposing a serious limitation on the previous techniques was resolved here by use of stereo-imaging. Three-dimensional information provided by stereo-imaging has made it possible to obtain simultaneously the size, location and velocity of each particle. The measurement procedures were fully automated with an on-line system consisting of two CCD cameras, strobe lamps, a digital image processor. and others. Particle identification was done by using a newly devised algorithm, which was shown to be robust against the out-of-focus effect. The performance of this algorithm was verified by sizing still particles. As a comprehensive test of the present technique, transparent glass beads falling through a vertical pipe were measured.

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  • 可視化情報学会誌 = Journal of the Visualization Society of Japan  

    可視化情報学会誌 = Journal of the Visualization Society of Japan 15, 347-350, 1995-07-01 

    The Visualization Society of Japan

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