沙尘的红外衰减特性研究  

Study on Infrared Attenuation Characteristics of Sand and Dust

作　　者：董群锋[1,2] 李应乐[1] 许家栋[2] 张辉[1] 王明军[1] 

机构地区：[1]咸阳师范学院,陕西咸阳712000 [2]西北工业大学,西安710072

出　　处：《装备环境工程》2012年第2期4-6,20,共4页Equipment Environmental Engineering

基　　金：国家自然科学基金(61102018;60971079);陕西省教育厅项目(2010JK891)

摘　　要：应用Mie理论分析了沙尘粒子的散射特性,研究了具有一定粒径分布的沙尘粒子的红外衰减特性。研究结果表明,指数分布和对数正态分布下沙尘的衰减预测结果比较接近且随能见度的增大衰减减小。不同沙尘天气衰减计算结果表明,波长为11μm时,沙尘暴引起的衰减最大、自然沙尘引起的衰减最小。The scattering characteristics of sand/dust particles were analyzed using Mie theory. The attenuation characteristic of infrared electromagnetic wave propagation in sand and dust with special size distribution was studied. The results showed that the attenuation of exponential distribution is very close to that of the Log-normal distribution, and decreases with visibility. From the calculation results of different sand weather at a wavelength of 11 μm, it was shown that sand-dust storm causes the highest attenuation, while the natural sand gives the lowest attenuation.

关 键 词：沙尘 MIE理论 衰减 

分 类 号：TN011[电子电信—物理电子学]