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Development of 3-dimensional PTV with prismatic light sheet

Research Project

Project/Area Number 13650213
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field Thermal engineering
Research InstitutionTokyo Gakugei University

Principal Investigator

MOCHIZUKI Takaaki  Tokyo Gakugei University, Dept. Technology Education, Associate Professor, 教育学部, 助教授 (70280360)

Co-Investigator(Kenkyū-buntansha) KAJI Nobufuji  Polytechnic University, Dept. Mechanical Engineering, Professor, 産業機械工学科, 教授
Project Period (FY) 2001 – 2002
Project Status Completed (Fiscal Year 2002)
Budget Amount *help
¥1,200,000 (Direct Cost: ¥1,200,000)
Fiscal Year 2002: ¥1,200,000 (Direct Cost: ¥1,200,000)
Keywords3-dimensional particle tracking / 3-D PIV / 3-D PTV / Prismatic light sheet / 3-dimensional flow visualization / Color image analysis / Particle tracking velocimetry / Color imaging / Visualization technique
Research Abstract

When rigid particles pass through a light sheet whose spectrum varies with its thickness, they reflect rays of varying colors. If we observe the particles using a color video camera whose axis is set normal to the light sheet, their motions can be determined from their loci and colors, as observed on a video monitor. Based on this principle, we have developed a novel scheme to determine the 3-dimensional translational motions of rigid particles in a liquid medium using only one color video camera. The rays reflected from particles are related to their loci through color analysis. In this study, we developed two types of illumination system to make the light sheet noted above, and we studied a calibration scheme by which we could obtain a relation between loci of the particles and rays reflected by the particles. Using the calibration curve obtained using the scheme shown in this study, we estimated the loci of particles with a diameter of about 0.1 mm ; the maximum error was 0.51 mm, and the standard deviation of the calibration curve was 0.21 mm when the hue angle was between 0.9 degree and 110 degree. An effect of concentrations of the particles in the liquid medium on the measuring accuracy for determining loci of the particles, and an effect of size distribution of the particles on the accuracy were also studied experimentally. We also studied the way in which loci and rays of the particles recorded in an image by the color video camera were detected through automatic image analysis by a computer.

Report

(3 results)
  • 2002 Annual Research Report   Final Research Report Summary
  • 2001 Annual Research Report

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Published: 2002-04-01   Modified: 2016-04-21  

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