Abstract
The article gives an overview on recent developments to 3D flow measurement techniques, focusing on photogrammetric aspects of 3D geometric modelling and multi-camera system configuration. A geometric model for a virtual four-camera system, which is realized by a single camera and a four-fold mirror system, is presented. The 3D-PTV model is extended by a ray tracing technique to strictly handle the spatial intersection of manifold broken optical beams when determining coordinates of particles in a liquid from images from multiple viewpoints taken by cameras observing the flow through multiple curved interfaces. Transferring these geometric models to PIV, we present some algorithmic improvements to tomographic PIV, which have the potential to achieve a significant reduction of the computational effort.
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Maas, HG., Putze, T., Westfeld, P. (2009). Recent Developments in 3D-PTV and Tomo-PIV. In: Nitsche, W., Dobriloff, C. (eds) Imaging Measurement Methods for Flow Analysis. Notes on Numerical Fluid Mechanics and Multidisciplinary Design, vol 106. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-01106-1_6
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DOI: https://doi.org/10.1007/978-3-642-01106-1_6
Publisher Name: Springer, Berlin, Heidelberg
Print ISBN: 978-3-642-01105-4
Online ISBN: 978-3-642-01106-1
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