烟幕扩散模型中任意光路电磁波透过率的计算  

Calculating the transmission rate of electromagnetic wave along any light-path in smoke diffusion model

作　　者：蒋云[1] 李伟[1] 宋伟伟[1] 于照亮 代晓东[1] JIANG Yun;LI Wei;SONG Wei-wei;YU Zhao-liang;DAI Xiao-dong(Researched Institute of Chemical Defense,Beijing 102205,China)

机构地区：[1]防化研究院,北京102205

出　　处：《激光与红外》2021年第1期95-99,共5页Laser & Infrared

基　　金：国防预研基金项目(No.30110020502)资助。

摘　　要：在烟幕扩散模型中,计算电磁波沿任意路径穿透烟幕云团时产生的衰减,需要准确计算出该路径下的烟幕积分浓度,从而得到电磁波的透过率。本文基于空间几何坐标变换原理、线性代数矩阵运算方法以及烟幕材料消光理论,推导了烟幕扩散模型中电磁波入射方向改变时的三维坐标系变换矩阵和二维积分浓度投影算法,实现了电磁波沿任意方向入射时的积分浓度分布及透过率的计算,为烟幕扩散模型的多角度(方向)数据分析、烟幕云团红外图像处理以及更多应用场景中的使用奠定了基础。In the smoke diffusion model,to calculate the attenuation of electromagnetic wave when it penetrates the smoke cloud along any path,it is necessary to accurately calculate the smoke integral concentration under this path,so as to obtain the transmission rate of electromagnetic wave.Based on the principle of space geometric coordinate transformation,the method of linear algebra matrix operation and the theory of smoke material extinction,the transformation matrix of three-dimensional coordinate system and the projection algorithm of two-dimensional integral concentration are derived when the incident direction of electromagnetic wave changes in the smoke diffusion model.The calculation of integral concentration distribution and transmissivity when the electromagnetic wave incidents in any direction is realized,which lays a foundation for the multi angle(direction)data analysis in smoke diffusion model,infrared image processing of smoke cloud and application in more scenarios.

关 键 词：烟幕 随机游走模型 烟幕积分浓度 坐标变换 

分 类 号：TJ530.2[兵器科学与技术—军事化学与烟火技术] TN972[电子电信—信号与信息处理]