Measurement of Velocity and Size of Particles by Using Stereo-Imaging Technique
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- KATO Hiroyuki
- Yokohama National University
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- NISHINO Koichi
- Yokohama National University
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- SHINSHI Akira
- Yokohama National University
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- TORII Kahoru
- Yokohama National University
Bibliographic Information
- Other Title
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- 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.
Journal
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- Journal of the Visualization Society of Japan
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Journal of the Visualization Society of Japan 15 (Supplement1), 347-350, 1995
The Visualization Society of Japan
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Details
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- CRID
- 1390282679595388160
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- NII Article ID
- 10002673610
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- NII Book ID
- AN10374478
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- ISSN
- 1884037X
- 09164731
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- Text Lang
- ja
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- Data Source
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- JaLC
- Crossref
- CiNii Articles
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- Abstract License Flag
- Disallowed