Sun Xiao-gang, Tang Hong, Dai Jing-min
Department of Automation Measurement and Control, Harbin Institute of Technology, Harbin 150001, China.
Guang Pu Xue Yu Guang Pu Fen Xi. 2008 Dec;28(12):2793-8.
The problem of determining the particle size range in the visible-infrared region was studied using the independent model algorithm in the total scattering technique. By the analysis and comparison of the accuracy of the inversion results for different R-R distributions, the measurement range of particle size was determined. Meanwhile, the corrected extinction coefficient was used instead of the original extinction coefficient, which could determine the measurement range of particle size with higher accuracy. Simulation experiments illustrate that the particle size distribution can be retrieved very well in the range from 0. 05 to 18 microm at relative refractive index m=1.235 in the visible-infrared spectral region, and the measurement range of particle size will vary with the varied wavelength range and relative refractive index. It is feasible to use the constrained least squares inversion method in the independent model to overcome the influence of the measurement error, and the inverse results are all still satisfactory when 1% stochastic noise is added to the value of the light extinction.
利用全散射技术中的独立模型算法研究了可见光-红外区域粒径范围的确定问题。通过对不同R-R分布反演结果精度的分析与比较，确定了粒径测量范围。同时，用修正后的消光系数代替原始消光系数，可更精确地确定粒径测量范围。模拟实验表明，在可见光-红外光谱区域相对折射率m = 1.235时，粒径分布在0.05至18微米范围内能够很好地反演出来，且粒径测量范围会随波长范围和相对折射率的变化而变化。在独立模型中使用约束最小二乘反演方法来克服测量误差的影响是可行的，当在光消光值上添加1%的随机噪声时，反演结果仍然令人满意。
