Accuracy improvement of digital holography based particle image velocimetry
Project/Area Number |
24560213
|
Research Category |
Grant-in-Aid for Scientific Research (C)
|
Allocation Type | Multi-year Fund |
Section | 一般 |
Research Field |
Fluid engineering
|
Research Institution | Osaka Sangyo University |
Principal Investigator |
OHMI KAZUO 大阪産業大学, デザイン工学部, 教授 (10144536)
|
Project Period (FY) |
2012-04-01 – 2015-03-31
|
Project Status |
Completed (Fiscal Year 2014)
|
Budget Amount *help |
¥5,460,000 (Direct Cost: ¥4,200,000、Indirect Cost: ¥1,260,000)
Fiscal Year 2014: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2013: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Fiscal Year 2012: ¥2,730,000 (Direct Cost: ¥2,100,000、Indirect Cost: ¥630,000)
|
Keywords | デジタルホログラフィ / 粒子画像流速計測法 / 画像計測 / 位相シフト干渉法 / 奥行計測 / 粒子画像流速測定 / 位相シフト干渉計 / 流体可視化 / 流体工学 / 3次元流体計測 / 粒子画像流速測定法 / ホログラフィー / トモグラフィー |
Outline of Final Research Achievements |
Digital holography based particle image velocimetry still suffers from poor resolution of particle depth detection, partly because of the existence of imaginary twin images and DC term background image. The new idea of the present work is to use the phase-shifting interferometry based digital holography in stead of the in-line one without using the mechanical phase-shifting system. To do so it resorted to the use of a Heterodyne interferometry based phase-shifting system, which had been expected to and did work with higher capture frequency without loss of spatial resolution. Another issue of the digital holography based particle image velocimetry is the precision of the particle depth detection schemes from the reconstructed image. To overcome this difficulty, the present work introduced a new concept skewness factor regarding the morphological feature of the particle luminosity peaks and this new parameter did work successfully to measure the exact particle depth without ambiguity.
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Report
(4 results)
Research Products
(20 results)