实验流体力学2013，Vol.27Issue(1)：102-105,4.
激光多普勒流速仪系统参数优化实验研究
Experimental study on optimization of Laser Doppler Velocimetry system parameter
摘要
Abstract
The photomultiplier tubes voltage (PMT), Burst Threshold (BST) and SNR level (SNR) are system parameters of Laser Doppler Velocimetry, which are directly related to the measurement results. In circulating water flume, authors did a lot of comparative experiments, and measured the influence of system parameters to data rate, time average velocity and fluctuating velocity. The experimental results showed; higher and lower PMT will make fluctuating velocity measurement results unstable, it is best to set PMT among 570V to 630V; BST value can be set at a relatively low range, which can improve the data rate, adjusting the BST value could accord to the transformation of the data rate; SNR level can be set to Very Low, which will not affect time average velocity and fluctuating velocity, but can get higher data rate. Optimization of the parameters of Laser Doppler Velocimetry can improve the sampling data rate and accuracy.关键词
激光多普勒流速仪/系统参数/优化实验Key words
Laser Doppler Velocimetry/system parameter/optimization experiment分类
机械制造引用本文复制引用
陈红,李聂贵,吕升奇,徐锡荣..激光多普勒流速仪系统参数优化实验研究[J].实验流体力学,2013,27(1):102-105,4.基金项目
国家自然科学基金(50909036) （50909036）
中央高校基本科研业务费专项(2009B09314) （2009B09314）
