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Presentation of two optical correlation-based measurement techniques for surface deformation: PROPAC and REPAC

Blumrich, Frederik and Schröder, Andreas and Konrath, Robert and Klinge, Falk (2006) Presentation of two optical correlation-based measurement techniques for surface deformation: PROPAC and REPAC. SENSOR Congress 2007, 2007-05-22 - 2007-05-24, Nürnberg (Germany). ISBN 978-3-9810993-2-4.

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Abstract

The objective of this study is to describe two measurement techniques: the Projected Pattern Correlation (PROPAC) and the Reflected Pattern Correlation (REPAC). As in the fringe projection technique the surface of a large area is determined simultaneously, but instead of using several images of different fringes for the solution of the correspondence problem we use only one measurement image with random dot patterns and cross-correlation algorithms. This new concept has the advantage that we can use the software and algorithms of the well-developed Particle Image Velocimetry (PIV) technique for flow measurements. The PIV algorithms have proved to be very fast (10 ms image acquisition, real-time measurements are possible) more robust and highly accurate. Due to the random character of the dot pattern the measured displacement vector between a reference surface and the deformed surface by means of cross-correlation is always unique.

Document Type:Conference or Workshop Item (Speech, Paper)
Title:Presentation of two optical correlation-based measurement techniques for surface deformation: PROPAC and REPAC
Authors:
AuthorsInstitution or Email of Authors
Blumrich, FrederikUNSPECIFIED
Schröder, AndreasUNSPECIFIED
Konrath, RobertUNSPECIFIED
Klinge, FalkUNSPECIFIED
Date:2006
Refereed publication:No
In SCOPUS:No
In ISI Web of Science:No
Volume:Vol. II
Page Range:pp. 117-122
Editors:
EditorsEmail
AMA Service GmbH, Wunstorf, Germany, UNSPECIFIED
Series Name:Conference Proceedings
ISBN:978-3-9810993-2-4
Status:Published
Keywords:PROPAC, Particle Image Velocimetry (PIV), REPAC
Event Title:SENSOR Congress 2007
Event Location:Nürnberg (Germany)
Event Type:international Conference
Event Dates:2007-05-22 - 2007-05-24
HGF - Research field:Aeronautics, Space and Transport (old)
HGF - Program:Aeronautics
HGF - Program Themes:Aircraft Research
DLR - Research area:Aeronautics
DLR - Program:L AR - Aircraft Research
DLR - Research theme (Project):L - Flight Physics
Location: Göttingen
Institutes and Institutions:Institute of Aerodynamics and Flow Technology > Experimental Methods
Deposited By: Ilka Micknaus
Deposited On:05 Jul 2007
Last Modified:14 Jan 2010 23:41

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