Measurement of Velocity and Size of Particles by Using Stereo-Imaging Technique

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Other Title
  • 241 ステレオ画像法による粒子径・速度の同時計測

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Abstract

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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Details

  • CRID
    1390282679595388160
  • NII Article ID
    10002673610
  • NII Book ID
    AN10374478
  • DOI
    10.3154/jvs.15.supplement1_347
  • ISSN
    1884037X
    09164731
  • Text Lang
    ja
  • Data Source
    • JaLC
    • Crossref
    • CiNii Articles
  • Abstract License Flag
    Disallowed

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