测量透明微粒群参量

Measuring the parameters of transparent particle groups

设计了测量透明微粒群参量的干涉检测系统,能够有效记录透明颗粒群在1阶彩虹角附近的光强分布,并利用Nussenzveig理论和改进的量子粒子群算法对记录图像进行反演,能够实现透明颗粒群粒径分布和折射率的同时测量.实验结果表明:以Lorenz-Mie理论作为模拟光强信号,利用算法反演模拟的微粒群信号,折射率相对误差为0.02%;通过实验测量粒径为400~600μm的玻璃微珠群,粒径均值的相对偏差为2.8%;对不同浓度乙醇喷雾的折射率进行测量,相对偏差小于0.7%.

An interference detection system was designed to measure the parameters of transparent particle groups,which could effectively record the light intensity distribution of transparent particle groups near the first-order rainbow angle,and the Nussenzveig theory and improved quantum particle groups algorithm were used to invert the recorded images,which could achieve the simultaneous measurement of particle size distribution and refractive index of particle populations.The experimental results showed that the relative error of the refractive index was 0.02% as the Lorenz-Mie theory was used as the simulated light intensity signal,and the algorithm was used to inverse the simulated particle group signal.The relative error of the average particle size was 2.8%by experimentally measuring the micro glass beads with a particle size of 400~600μm.The relative error of the refractive index of ethanol spray with different concentrations was less than 0.7%.