二值化粒子成象流速测量系统研究  

Bilevel Picture Sampling Digital Particle Image Velocimetry

作　　者：刘杰[1] 刘昌文[1] 黄河振 王仕康[1] 

机构地区：[1]天津大学

出　　处：《仪器仪表学报》1996年第3期262-267,共6页Chinese Journal of Scientific Instrument

摘　　要：本文提出了数字ＰＩＶ技术中采取二值化数值采样思想，并对二值化粒子成象流速测量系统的实现及其程控光源、二值化采样、图象处理各部分工作原理作了介绍。论述了在ＣＣＤ工作原理基础上提高系统测速上限的方法。论文还介绍了利用该系统对转盘速度径向分布的测量结果及对方管内圆柱扰流流场的测量结果，并给出了流场速度矢量分布图。In this paper the idea of the Bilevel Pictuer Sampling Digital Partide Image (BPS DPIV) is proposed. After a brief intruduction to the working principle and construction of the system,some detail description are given to the three main parts of the practice BPS-DPIV system,which are the computer controlled laser light supply,the bilevel picture sampling device and the picture processing program. A new CCD exposing method is also presented,by which the maximun measureabble velocity of PIV can be increased greatly. Finally, the velocity distributions got by employing the new devolped BPS-DPIV system are given.

关 键 词：二值化 粒子数字成像 流速测量系统 

分 类 号：TH815[机械工程—仪器科学与技术]