Author(s): Wen-Yi Chang; Whey-Fone Tsai
Linked Author(s):
Keywords: No Keywords
Abstract: Understanding the flow behavior is crucial in an aquatic habitat study. Hence, for eco-hydraulic researchers, a convenient velocity-measuring tool is needed during the field investigation. In recent years, the particle image velocimetry (PIV) has gained a great attention due to its intuitive, non-intrusive and large-scale characteristics. However, the conventional PIV measurement may be burdensome because the survey of ground control points (GCPs) in the field is time and labor-consuming. In this study, we show the use of the laser-positioning PIV measurement for surface flow velocities in an aquatic habitat. Instead of the traditional ground-based survey of GCPs, 4 laser points are projected on the flow surface as GCPs to facilitate the PIV measurement in the field. In addition, based on the developed Apps, the image capturing, the image ortho-rectification and the image analysis for velocity can be accomplished on an Android camera. A field test was carried out to show its capability and applicability. The preliminary result shows that the laser-positioning PIV system could be easily set up and quickly measure the surface flow velocity in the field.
Year: 2018