Development of a non-intrusive and efficient flow monitoring technique : The space-time image Velocimetry (STIV)

Fujita Ichiro

Watanabe Hideki

Tsubaki Ryota

International journal of river basin management

A novel image analysis technique for measuring river surface flow is proposed. When we assume that the brightness distribution of river surface image is convected with the surface velocity, a space-time image for a searching line set parallel to the main flow would indicate velocity information as its image orientation. The new technique, the space-time image velocimetry (STIV), is capable to measure the orientation angle of the pattern using the eigenvalue analysis of the local space-time image. The performance of STIV is compared with the other image analysis technique, the large-scale particle image velocimetry (LSPIV), previously proposed by the authors and it is shown that STIV is an alternative image analysis method for measuring streamwise velocity distributions efficiently.

River flow measurement

Image analysis

Space-time image velocimetry (STIV)

Large-scale image velocimetry (LSPIV)

Real time measurement

Construction. Civil engineering [ 510 ]

eng

International Association of Hydraulic Engineering and Research

(c) 2007 IAHR, INBO & IAHS

[ISSN] 1571-5124

[DOI] 10.1080/15715124.2007.9635310

[NCID] AA12074451

[DOI] http://dx.doi.org/10.1080/15715124.2007.9635310