Analysis of a laser Doppler anemometer

Analysis of a laser Doppler anemometer
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激光多普勒风速计的分析

DOI：
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发表时间：
1971
期刊：
影响因子：
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通讯作者：
R. J. Goldstein
R. J. Goldstein
中科院分区：
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文献类型：
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作者：
R. J. Adrian;R. J. Goldstein

文献摘要

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相似文献

对激光多普勒风速仪进行了理论分析。从Mie散射理论出发，推导了单个运动散射粒子产生的光电流和光谱的表达式。从定义接收信号的区域的这些表达式关系中，获得频谱带宽和频谱幅度。将结果推广到任意数目的随机位置散射粒子所产生的信号，并进行统计处理，以考察粒子浓度对均方谱幅度和信噪比的影响。本文中的噪声是指由散射体位置的随机性和浓度波动引起的频谱波动。
A theoretical analysis for a laser Doppler anemometer is presented. Starting with Mie scattering theory, expressions are derived for the photocurrent and spectrum due to a single moving scattering particle. From these expressions relations defining the region from which signals are received, the spectrum bandwidth and the spectrum amplitude are obtained. The results are generalized to the signal due to an arbitrary number of randomly positioned scattering particles and treated statistically to examine the effects of particle concentration on the mean square spectrum amplitude and signal-to-noise ratio. Noise in this context refers to spectrum fluctuations arising from the randomness of scatterer positions and concentration fluctuations.