Large-scale particle tracking velocimetry with multi-channel CCD cameras  

作　　者：Dan-xun LI Qiang ZHONG Ming-zhong YU Xing-kui WANG 

机构地区：[1]State Key Laboratory of Hydroscience and Engineering,Tsinghua University [2]Beijing Reco Vision Technology Co.,LTD

出　　处：《International Journal of Sediment Research》2013年第1期103-110,共8页国际泥沙研究（英文版）

基　　金：financially supported by National Natural Science Foundation of China(50779023)

摘　　要：This paper presents a large-scale particle tracking velocimetry （LSPTV） system for measuring surface velocity in vast unsteady flows. The system consists of a flexible number of one-computer-sixcamera working units connected via local network or the internet. Multiple zero-tilting cameras are used to increases the field of view with minimum perspective distortions. External synchronization of video outputs of all cameras facilitates uninterrupted image acquisition within the system. Effectiveness and efficiency of the multi-channel LSPTV are enhanced by optimizing illumination, flow seeding, image acquisition and correction, tracer identification, particle matching, and post-processing. The capacity of the LSPTV was demonstrated in the measurement of physical model flows for the Three Gorges Project.This paper presents a large-scale particle tracking velocimetry （LSPTV） system for measuring surface velocity in vast unsteady flows. The system consists of a flexible number of one-computer-sixcamera working units connected via local network or the internet. Multiple zero-tilting cameras are used to increases the field of view with minimum perspective distortions. External synchronization of video outputs of all cameras facilitates uninterrupted image acquisition within the system. Effectiveness and efficiency of the multi-channel LSPTV are enhanced by optimizing illumination, flow seeding, image acquisition and correction, tracer identification, particle matching, and post-processing. The capacity of the LSPTV was demonstrated in the measurement of physical model flows for the Three Gorges Project.

关 键 词：Particle tracking velocimetry （PTV） CAMERA Unsteady flow VELOCITY 

分 类 号：TV149[水利工程—水力学及河流动力学]