Optics: measuring and testing – Velocity or velocity/height measuring – With light detector
Patent
1997-12-15
1999-05-18
Buczinski, Stephen C.
Optics: measuring and testing
Velocity or velocity/height measuring
With light detector
348135, 356337, G01P3/36
Patent
active
059055685
ABSTRACT:
A system and a method for measuring three-dimensional velocities at a plurality of points in a fluid employing at least two cameras positioned approximately perpendicular to one another. The cameras are calibrated to accurately represent image coordinates in world coordinate system. The two-dimensional views of the cameras are recorded for image processing and centroid coordinate determination. Any overlapping particle clusters are decomposed into constituent centroids. The tracer particles are tracked on a two-dimensional basis and then stereo matched to obtain three-dimensional locations of the particles as a function of time so that velocities can be measured therefrom. The stereo imaging velocimetry technique of the present invention provides a full-field, quantitative, three-dimensional map of any optically transparent fluid which is seeded with tracer particles.
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Glasgow Thomas K.
McDowell Mark
Buczinski Stephen C.
Stone Kent N.
The United States of America as represented by the Administrator
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