一种激光粒子图像速度粒度实时同场测量技术查询系统的开发

The Development of An Interrogation System for Particle Image Velocimetry & Sizer (PIVS)

本文开发了一个新型的粒子图像速度粒度场仪(PIVS)查询系统,提出了一条新的PIVS配对前预处理思路。该查询系统以DPIV粒子图像为处理对象,结合图像处理技术,采用灰度频数统计法及灰度差分法分别获取速度和粒径信息,实现了速度粒度的同场测量,并利用模拟粒子图像对基于灰度差分法查询算法进行了图像检验。检验结果表明,该查询算法能很好的处理各种模拟图像,并且有很高的计算精度及良好的运算效率。

This paper propases interrogation algoritlun for Particle Image Velecimetry ＆ Sizer （PIVS） and a new preprocessing method of PIVS images before pairing. Combining with image processing technology, interrogation algorithm of Grey - scale Difference Methed（GDM） is developed and valued by simulated DPIV auto- correlation images. Using grey- scale statistic method and GDM, velocity vector and particle size are acquired simultaneously. The result shows that the proposed algoritlun can process different simulated particle images with high accuracy and meet the need for the real time operation.