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Optical measurement of surface deformation

Stasicki, Boleslaw and Boden, Fritz (2008) Optical measurement of surface deformation. [Other]

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Abstract

An electronic camera, which is synchronized with the oscillation via a digital phase shifter, is targeted on this pattern. By recording a reference frame e.g. at the neutral position of the wing as well as a second frame in the deflected position and comparing both, the displacement vectors of the dots can be calculated by means of correlation analysis. Hence the translation and the deformation of the examined surface are obtained. For qualitative preview this calculation can be done in real-time, so that the vectors are directly depicted on the screen. By using the digital phase shifter, the movement of the object and the corresponding vector fields can be displayed in real-time as slowly as desired (slow motion effect). To get real three-dimensional information about the movement and the deformation of the investigated surface, a stereoscopic camera setup consisting of two cameras targeted on the same dot pattern from different positions i.e. under different viewing angles can be used.

Document Type:Other
Title:Optical measurement of surface deformation
Authors:
AuthorsInstitution or Email of Authors
Stasicki, BoleslawUNSPECIFIED
Boden, FritzUNSPECIFIED
Date:2008
Refereed publication:No
In SCOPUS:No
In ISI Web of Science:No
Number of Pages:2
Series Name:Handout
Status:Published
Keywords:Image Pattern Correlation Technique (IPCT), DLR's prototype Fairchild Dornier (Do 728), videostroboscopy
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:15 May 2008
Last Modified:27 Apr 2009 14:27

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