中文摘要：

粒子图像测速（PIV）是一种快速全流场测量方法。为克服PIV设备昂贵和操作复杂等缺点，文中介绍一种新的简化PIV方法。它是根据PIV测速原理，并利用现有的连续抓图软件，CAD和Origin等绘图软件对示踪粒子进行捕捉及图像处理，并将其应用于水底浮帘截留促淤装置的实验中，成功获得了浮帘后方回流区的瞬时流场分布图。

英文摘要：

The particle image velocimetry （PIV） is a fast and whole current field measuring method, and a simplified PIV method is developed to overcome the PIV shortcom- ings such as expensive equipment and complicated operations. The simplified method is based on the velocity measuring principle of PIV and uses available softwares of continu- ous catching image, CAD and Origin to catch the tracer particles and make the image processing. In this paper, the simplified PIV method is applied to an experimental device to use an underwater floating curtain for sediment retention and deposition promotion on the channel bed, and the distributions of instantaneous current field in the lee of underwater floating curtain are successfully obtained.