JP4239175B2 - ボリュームにおける三次元の速度フィールドを測定する方法 - Google Patents
ボリュームにおける三次元の速度フィールドを測定する方法 Download PDFInfo
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- JP4239175B2 JP4239175B2 JP2004269455A JP2004269455A JP4239175B2 JP 4239175 B2 JP4239175 B2 JP 4239175B2 JP 2004269455 A JP2004269455 A JP 2004269455A JP 2004269455 A JP2004269455 A JP 2004269455A JP 4239175 B2 JP4239175 B2 JP 4239175B2
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- 238000000034 method Methods 0.000 claims description 23
- 239000002245 particle Substances 0.000 claims description 20
- 238000005259 measurement Methods 0.000 claims description 17
- 238000006073 displacement reaction Methods 0.000 claims description 13
- 238000003384 imaging method Methods 0.000 claims description 4
- 230000001419 dependent effect Effects 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 238000004364 calculation method Methods 0.000 description 1
- 238000010219 correlation analysis Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000001747 exhibiting effect Effects 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000005215 recombination Methods 0.000 description 1
- 230000006798 recombination Effects 0.000 description 1
- 238000010561 standard procedure Methods 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
- G01P5/00—Measuring speed of fluids, e.g. of air stream; Measuring speed of bodies relative to fluids, e.g. of ship, of aircraft
- G01P5/18—Measuring speed of fluids, e.g. of air stream; Measuring speed of bodies relative to fluids, e.g. of ship, of aircraft by measuring the time taken to traverse a fixed distance
- G01P5/22—Measuring speed of fluids, e.g. of air stream; Measuring speed of bodies relative to fluids, e.g. of ship, of aircraft by measuring the time taken to traverse a fixed distance using auto-correlation or cross-correlation detection means
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
- G01P5/00—Measuring speed of fluids, e.g. of air stream; Measuring speed of bodies relative to fluids, e.g. of ship, of aircraft
- G01P5/001—Full-field flow measurement, e.g. determining flow velocity and direction in a whole region at the same time, flow visualisation
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T7/00—Image analysis
- G06T7/20—Analysis of motion
- G06T7/285—Analysis of motion using a sequence of stereo image pairs
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Aviation & Aerospace Engineering (AREA)
- Multimedia (AREA)
- Computer Vision & Pattern Recognition (AREA)
- Theoretical Computer Science (AREA)
- Length Measuring Devices By Optical Means (AREA)
- Image Processing (AREA)
Description
2 測定ボリューム
3 ボリュームエレメント(ボクセル)
10 カメラ
20 ピクセル
40 ピクセル
Claims (3)
- ボリュームにおける三次元の速度フィールドを測定する方法であって、前記ボリューム内の粒子が、前記ボリュームを照射することによって放射するように励起され、
a)少なくとも、時刻t 1 において、前記観測ボリュームを同時にイメージキャプチャし、時刻t 2 に再び前記観測ボリュームを同時にイメージキャプチャする少なくとも二つのカメラと、
b)前記観測ボリューム1が、小さいボリュームエレメント(ボクセル)3に分割され、
c)位置(x,y,z)の各ボクセルが、結像方程式を使用して、前記少なくとも二つのカメラのカメライメージポイント(xn,yn)の上に投影され、
d)前記ボクセルすべての輝度が、前記関連するイメージポイント(xn,yn)のそれぞれ一つの前記測定された輝度から再構成され、
e)複数のボクセルが、測定ボリュームを形成するように組み合され、
f)変位ベクトル(dx,dy,dz)が、前記二つの測定ボリューム2の三次元相互相関によって、前記同じ位置における前記時間(t1,t2)において測定される、方法。 - 前記ボクセルの輝度が、前記カメラのイメージポイント(xn,xn)の輝度のサブピクセルの精密な補間から計算されることを特徴とする請求項1に記載の方法。
- 前記位置(x,y,z)におけるボクセルの輝度が、乗法的な代数的再構成法(MART)よって計算されることを特徴とする請求項1に記載の方法。
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10343160A DE10343160B3 (de) | 2003-09-18 | 2003-09-18 | Verfahren zur Bestimmung eines dreidimensionalen Geschwindigkeitsfeldes in einem Volumen |
Publications (2)
Publication Number | Publication Date |
---|---|
JP2005091364A JP2005091364A (ja) | 2005-04-07 |
JP4239175B2 true JP4239175B2 (ja) | 2009-03-18 |
Family
ID=34177807
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Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2004269455A Active JP4239175B2 (ja) | 2003-09-18 | 2004-09-16 | ボリュームにおける三次元の速度フィールドを測定する方法 |
Country Status (5)
Country | Link |
---|---|
US (1) | US7382900B2 (ja) |
EP (1) | EP1517150B1 (ja) |
JP (1) | JP4239175B2 (ja) |
CN (1) | CN1598594A (ja) |
DE (2) | DE10343160B3 (ja) |
Families Citing this family (16)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10312696B3 (de) * | 2003-03-21 | 2004-12-23 | Lavision Gmbh | Verfahren zur Bestimmung der Abbildungsgleichung für die Selbstkalibrierung in Bezug auf die Durchführung von Stereo-PIV-Verfahren |
DE102006055746A1 (de) * | 2006-11-25 | 2008-05-29 | Lavision Gmbh | Verfahren zur Korrektur einer Volumenabbildungsgleichung zur Bestimmung eines Geschwindigkeitsfeldes von Teilchen in einem Volumen |
DE102008003535B4 (de) * | 2008-01-08 | 2009-12-31 | Deutsches Zentrum für Luft- und Raumfahrt e.V. | Verfahren zur Bestimmung von Strömungsgeschwindigkeiten in einer lichtstreuende Partikel mitführenden Strömung |
DE102009009551B4 (de) | 2009-02-19 | 2013-02-07 | Lavision Gmbh | Verfahren zur Bestimmung von Strömungsverhältnissen |
DE102009060580B4 (de) | 2009-12-23 | 2013-02-21 | Lavision Gmbh | Verfahren zur Bestimmung eines Satzes von optischen Abbildungsfunktionen für die 3D-Strömungsmessung |
US10288641B2 (en) * | 2010-01-29 | 2019-05-14 | Worcester Polytechnic Institute | System and method of measuring 2- and 3-dimensional velocity vector using cross-correlation velocimetry |
US8922636B1 (en) * | 2010-08-20 | 2014-12-30 | The United States Of America As Represented By The Secretary Of The Navy | Synthetic aperture imaging for fluid flows |
DE102010037305A1 (de) | 2010-09-03 | 2012-03-08 | Deutsches Zentrum für Luft- und Raumfahrt e.V. | Tomografisches Verfahren zur Erfassung des dreidimensionalen Verlaufs und von dreidimensionalen Verformungen von Oberflächen |
CN102289790B (zh) * | 2011-06-22 | 2012-12-19 | 哈尔滨工业大学 | 一种超声心动图粒子图像测速速度场修正方法 |
JP6136018B2 (ja) * | 2014-02-28 | 2017-05-31 | 株式会社フローテック・リサーチ | 可視化流体の流速計測方法及び流速計測システム |
CN105301282A (zh) * | 2015-11-25 | 2016-02-03 | 河海大学 | 一种流体三维速度场测量系统 |
GB2551970B (en) * | 2016-06-29 | 2021-10-27 | Sony Europe Bv | Determining the position of an object in a scene |
US10186051B2 (en) | 2017-05-11 | 2019-01-22 | Dantec Dynamics A/S | Method and system for calibrating a velocimetry system |
DE102017113194B4 (de) | 2017-06-14 | 2019-06-19 | Deutsches Zentrum für Luft- und Raumfahrt e.V. | Verfahren zum Verfolgen einer Vielzahl von punktförmigen Objekten im Raum |
CN110672215B (zh) * | 2019-09-17 | 2021-05-04 | 中国人民解放军陆军工程大学 | 瞬时光脉冲三维速度测量方法 |
CN114062712B (zh) * | 2021-09-29 | 2022-09-06 | 东南大学 | 基于单光场成像的合成孔径粒子图像测速方法及装置 |
Family Cites Families (16)
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DE4408072C2 (de) * | 1994-02-01 | 1997-11-20 | Deutsche Forsch Luft Raumfahrt | Verwendung einer elektronischen Hochgeschwindigkeitskamera bei einem Verfahren zur Bestimmung von Strömungsgeschwindigkeiten in einer Strömung |
US5699444A (en) | 1995-03-31 | 1997-12-16 | Synthonics Incorporated | Methods and apparatus for using image data to determine camera location and orientation |
EP0745838B1 (de) * | 1995-05-31 | 2003-02-05 | Vaisala Impulsphysik GmbH | Sichtweitenmessgerät |
ES2197267T3 (es) * | 1996-09-05 | 2004-01-01 | Robert Bosch Gmbh | Procedimiento y dispositivo para registrar estructuras de corriente tridimensionales. |
US5905568A (en) * | 1997-12-15 | 1999-05-18 | The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration | Stereo imaging velocimetry |
DE19801615A1 (de) * | 1998-01-17 | 1999-07-29 | Bosch Gmbh Robert | Kalibrierverfahren für Laserlichtschnittverfahren |
US6278460B1 (en) * | 1998-12-15 | 2001-08-21 | Point Cloud, Inc. | Creating a three-dimensional model from two-dimensional images |
DE19928698A1 (de) * | 1999-06-23 | 2000-09-21 | Deutsch Zentr Luft & Raumfahrt | Vorrichtung zur Durchführung von PIV-Messungen |
US6990228B1 (en) * | 1999-12-17 | 2006-01-24 | Canon Kabushiki Kaisha | Image processing apparatus |
US6980690B1 (en) * | 2000-01-20 | 2005-12-27 | Canon Kabushiki Kaisha | Image processing apparatus |
US6789039B1 (en) | 2000-04-05 | 2004-09-07 | Microsoft Corporation | Relative range camera calibration |
WO2002093916A2 (en) | 2001-05-14 | 2002-11-21 | Elder James H | Attentive panoramic visual sensor |
US6542226B1 (en) * | 2001-06-04 | 2003-04-01 | The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration | Planar particle imaging and doppler velocimetry system and method |
US7257237B1 (en) * | 2003-03-07 | 2007-08-14 | Sandia Corporation | Real time markerless motion tracking using linked kinematic chains |
DE10312696B3 (de) | 2003-03-21 | 2004-12-23 | Lavision Gmbh | Verfahren zur Bestimmung der Abbildungsgleichung für die Selbstkalibrierung in Bezug auf die Durchführung von Stereo-PIV-Verfahren |
US8064684B2 (en) * | 2003-04-16 | 2011-11-22 | Massachusetts Institute Of Technology | Methods and apparatus for visualizing volumetric data using deformable physical object |
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2003
- 2003-09-18 DE DE10343160A patent/DE10343160B3/de not_active Expired - Fee Related
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- 2004-08-24 DE DE502004007111T patent/DE502004007111D1/de active Active
- 2004-08-24 EP EP04020004A patent/EP1517150B1/de active Active
- 2004-09-08 US US10/936,398 patent/US7382900B2/en active Active
- 2004-09-16 JP JP2004269455A patent/JP4239175B2/ja active Active
- 2004-09-17 CN CNA2004100739753A patent/CN1598594A/zh active Pending
Also Published As
Publication number | Publication date |
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EP1517150A2 (de) | 2005-03-23 |
EP1517150A3 (de) | 2005-03-30 |
CN1598594A (zh) | 2005-03-23 |
EP1517150B1 (de) | 2008-05-14 |
US20050062954A1 (en) | 2005-03-24 |
JP2005091364A (ja) | 2005-04-07 |
US7382900B2 (en) | 2008-06-03 |
DE10343160B3 (de) | 2005-05-25 |
DE502004007111D1 (de) | 2008-06-26 |
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