ES2185481B1 - SPEED EQUIPMENT FOR CORRELATION OF IMAGES WITH REDUCTION OF ERRORS ASSOCIATED WITH SPEED GRADIENTS AND ON THE EDGE OF THE INTERROGATION WINDOW. - Google Patents

SPEED EQUIPMENT FOR CORRELATION OF IMAGES WITH REDUCTION OF ERRORS ASSOCIATED WITH SPEED GRADIENTS AND ON THE EDGE OF THE INTERROGATION WINDOW.

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Publication number
ES2185481B1
ES2185481B1 ES200100630A ES200100630A ES2185481B1 ES 2185481 B1 ES2185481 B1 ES 2185481B1 ES 200100630 A ES200100630 A ES 200100630A ES 200100630 A ES200100630 A ES 200100630A ES 2185481 B1 ES2185481 B1 ES 2185481B1
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Spain
Prior art keywords
speed
reduction
speedometer
errors associated
images
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
ES200100630A
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Spanish (es)
Other versions
ES2185481A1 (en
Inventor
Jose Ignacio Nogueira Goriba
Antonio Lecuona Newmann
Pedro Acislo Rodriguez Aumente
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Universidad Carlos III de Madrid
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Universidad Carlos III de Madrid
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Universidad Carlos III de Madrid filed Critical Universidad Carlos III de Madrid
Priority to ES200100630A priority Critical patent/ES2185481B1/en
Publication of ES2185481A1 publication Critical patent/ES2185481A1/en
Application granted granted Critical
Publication of ES2185481B1 publication Critical patent/ES2185481B1/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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  • Image Analysis (AREA)

Abstract

La presente invención es una modificación de los equipos usuales de velocimetría por imágenes de partículas (Particle Image Velocimetry o PIV). Esta modificación consiste en el uso combinado de correlación directa simétrica y compensación de la deformación patrón de partículas, evitando la inestabilidad que puede desarrollarse en dicha asociación. El gráfico adjunto presenta un ejemplo de dicha inestabilidad. Las ventajas de este velocímetro de PIV son la reducción de los errores asociados a los bordes de la ventana de interrogación y a la presencia de gradientes en el campo de desplazamientos. Las posibilidades de aplicación de este velocímetro abarca la totalidad de campos en los que se emplea el PIV usualmente (como pueden ser el aeronáutico, naval, medio ambiente, ingeniería civil y mecánica, industria química, etc.)The present invention is a modification of the usual speedometer equipment for particle images (Particle Image Velocimetry or PIV). This modification consists of the combined use of symmetric direct correlation and compensation of the standard deformation of particles, avoiding the instability that can develop in said association. The attached graphic presents an example of such instability. The advantages of this PIV speedometer are the reduction of errors associated with the edges of the interrogation window and the presence of gradients in the displacement field. The application possibilities of this speedometer cover all the fields in which the IVP is usually used (such as aeronautics, naval, environment, civil and mechanical engineering, chemical industry, etc.)

ES200100630A 2001-03-19 2001-03-19 SPEED EQUIPMENT FOR CORRELATION OF IMAGES WITH REDUCTION OF ERRORS ASSOCIATED WITH SPEED GRADIENTS AND ON THE EDGE OF THE INTERROGATION WINDOW. Expired - Fee Related ES2185481B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
ES200100630A ES2185481B1 (en) 2001-03-19 2001-03-19 SPEED EQUIPMENT FOR CORRELATION OF IMAGES WITH REDUCTION OF ERRORS ASSOCIATED WITH SPEED GRADIENTS AND ON THE EDGE OF THE INTERROGATION WINDOW.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
ES200100630A ES2185481B1 (en) 2001-03-19 2001-03-19 SPEED EQUIPMENT FOR CORRELATION OF IMAGES WITH REDUCTION OF ERRORS ASSOCIATED WITH SPEED GRADIENTS AND ON THE EDGE OF THE INTERROGATION WINDOW.

Publications (2)

Publication Number Publication Date
ES2185481A1 ES2185481A1 (en) 2003-04-16
ES2185481B1 true ES2185481B1 (en) 2004-09-16

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ID=8497128

Family Applications (1)

Application Number Title Priority Date Filing Date
ES200100630A Expired - Fee Related ES2185481B1 (en) 2001-03-19 2001-03-19 SPEED EQUIPMENT FOR CORRELATION OF IMAGES WITH REDUCTION OF ERRORS ASSOCIATED WITH SPEED GRADIENTS AND ON THE EDGE OF THE INTERROGATION WINDOW.

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Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4408072C2 (en) * 1994-02-01 1997-11-20 Deutsche Forsch Luft Raumfahrt Use of an electronic high-speed camera in a method for determining flow velocities in a flow
JPH08129025A (en) * 1994-10-28 1996-05-21 Mitsubishi Space Software Kk Three-dimensional image processing flow velocity measuring method
WO2000003308A2 (en) * 1998-07-10 2000-01-20 Kansas State University Research Foundation Particle image velocimetry apparatus and methods
JP3325002B2 (en) * 1999-09-06 2002-09-17 核燃料サイクル開発機構 Moving object measurement method using image correlation

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Publication number Publication date
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