【摘要】 通过对光散射理论的数值模拟,分析了影响颗粒散射光通量F和粒径D之间单值关系的采光方向角、采光立体角和被测颗粒折射率等因素. 与光散射颗粒计数器在异轴90°采光不同,用光散射法测量TSP和PM10在45°方向采光,并采用较大立体角(??? > 50°),能得到较好的F-D关系,同时颗粒折射率的影响也较小.更多还原

【Abstract】 To measure TSP and PM10 with light scattering method is just being developed. The direction angle ? of detecting, the detecting solid angle ?? and refractive index m are main factors affecting the relationship between scattered light flux F and particle diameter D. The results of numerical analysis of these factors are presented in the paper. The results show that to measure TSP and PM10 in forward 45°direction with large solid angle (>50°) may get good F-D relation and less influence of particle refraction index.更多还原