日盲紫外光霾粒子光散射测量方法研究.pdf

第30卷第9期
电子测量与仪器学报
Yol. 30 No 9
1432?
OURNAL OF ELECIRONIC MEASUREMENT, AND INSTRUMENTATION
2016年9月
1)01:10.1382/j.jemi.2016.09.019
日盲紫外光霾粒子光散射测量方法研究
赵太飞康博伦
(西安理工大学自动化与信息工科学院西安710048)
摘要:针対光散射粒子测量方法中测量结果受到外界朵散光十这一向题,提出将川肓紫外光应用于光散射粒子测量方
法中。利用Mie散射理论仿真、了日盲紫外光不同粒径粒子的散射光分布函数,结果表明,日盲紫外光对粒径较小的粒子故
射特性良好,能够成用于光散射粒子测量方法之中。利用T矩阵方法计算『口盲紫外光椭球粒子的散射特性,结果表明
在日自紫外光248m处,椭球粒子的消光截面柑比等效球形粒子偏小2.82%,放射截面偏小1.95%。最后分析了椭球粒
子形变参数与复折射卒对其散射相函数的影响,这些分析为光散射粒子测量方法提供了一定的理论依据。
关鍵词:日盲紫外光;光散射;椭球粒子;相函数
中图分类号:TN98文献标识码:A国家标准学科分类代码:120.1099
Research on light scattering measurement method of haze particles at blind UV
Zhao Taifei Kang Bolun
( Faculty of Automation and Information Engineering, Xi an Lniversity of Technology, Xi an 710048, China
Abstract. Aiming at the measurement result of light scattering measurement method disturbed by stray light of
external, the method applying blind UV to light scattering particle measurement is proposed. Mie theory is used to
simulate the scattered light s distribution function of particles of different size at blind UV, and the result shows
that blind UV has good scattering characteristics to smaller particles which can be used in light scattering particle
measurement method. This paper uses T-matrix to calculate the scattering characteristics of ellipsoid particles at
blind V, and the result shows that at 248 nm of blind UV, the ellipsoid particles'extinction section is low 2
82% and the scattering section is lower 1. 95 compared with equivalent spherical particles. At last, the influence
of ellipsoid particles shape change and refractive index to the seattering phase function is analyzed, this analysis
provide some theoretical foundations of light scattering particle measurement theory
Keywords: blind UV; light scattering; spheroidal particles; phase function
1引
测已经成为当下的一个研究热点。随着对精确
测量和白动化测量要求的日益增长,进行雾霾粒子
近年来,在我国经济迅速发展的同时,雾羅天的实时测量已势在必行2。光散射粒子测量方法
气成为目浠突出的环境问题。雾霾天气被公认为能够自动并且连续监测雾羅粒子浓度而被广泛
灾害性天气,1)影响通行安全,地面能见度降低导关注
致交通事故多发;2)导致气象变异,区域气候反
相比传统的粒子测量仪器,基于光散射法的粒
常:3)损害人体健康,所以对雾霾粒子的测量与监子测量仪器更加廉价,结构也相对简单。在不考
收稿凵期:2016-05 Received Date:2016-05
基金项り;豪科学基金(い4310资助项日