Ronneberger, O. and Raffel, M. and Kompenhans, J. (1998) Advanced Evaluation Algorithms for Standard and Dual Plane Particle Image Velocimetry. 9th International Symposium on Applications of Laser Techniques to Fluid Mechanics, Lissabon/Portugal, 13.-16. Juli 1998.
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The widely-used evaluation algorithms for PIV recording have some short comings, in that they introduce superfluous statistical and systematical errors. For example, they introduce the so-called "peak-locking" effect. These errors can be significantly reduced by using better algorithms. The following considerably improved analysis and algorithms will be described and demonstrated on real PIV recordings: - Analysis of errors of CCD's and the electric transmisson of the video signal. - A FFT-based cross correlation algorithm using completely free-shaped and free-sized interrogation windows which exhibits the same accuracy as an optimally programmed direct correlation. - A Gaussian fit algorithm using different weights for the values in the correlation plane due to the error distribution of correlation coefficients.
|Document Type:||Conference or Workshop Item (Paper)|
|Title:||Advanced Evaluation Algorithms for Standard and Dual Plane Particle Image Velocimetry|
|Keywords:||Particle Image Velocimetry, peak-locking, FFT, correlation, PIV software|
|Event Title:||9th International Symposium on Applications of Laser Techniques to Fluid Mechanics, Lissabon/Portugal, 13.-16. Juli 1998|
|HGF - Research field:||Aeronautics, Space and Transport (old)|
|HGF - Program:||Aeronautics|
|HGF - Program Themes:||other|
|DLR - Research area:||Aeronautics|
|DLR - Program:||L ST - Starrflüglertechnologien|
|DLR - Research theme (Project):||UNSPECIFIED|
|Location:||Köln-Porz , Braunschweig , Göttingen|
|Institutes and Institutions:||Institute of Aerodynamics and Flow Technology > Institut für Strömungsmechanik|
|Deposited By:||elib DLR-Beauftragter|
|Deposited On:||16 Sep 2005|
|Last Modified:||14 Jan 2010 20:25|
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