不同波长激光在典型气溶胶粒子中的传输特性  

Transmission Characteristics of Lasers with Different Wavelengths in Typical Aerosol Particles

作　　者：马超[1] 陈慧敏[1] 齐斌[1] 郭鹏宇 杨尚贤 高丽娟 MA Chao;CHEN Huimin;QI Bin;GUO Pengyu;YANG Shangxian;GAO Lijuan(Science and Technology on Electromechanical Dynamic Control Laboratory,Beijing Institute of Technology,Beijing 100081,China)

机构地区：[1]北京理工大学机电动态控制重点实验室,北京100081

出　　处：《兵工学报》2020年第S02期249-256,共8页Acta Armamentarii

基　　金：机电动态控制重点实验室基金项目(614260103030718);国家自然科学基金委员会与中国工程物理研究院联合基金项目(U1630131)。

摘　　要：战场环境下脉冲激光引信的探测性能容易受到气溶胶粒子的干扰,引起虚警和漏警。为研究脉冲激光引信在气溶胶环境下的传输特性,基于Mie散射理论,对沙尘性、水溶性、海洋性和煤烟性气溶胶粒子的消光特性和散射特性进行建模仿真分析。选取波长分别为0.905μm、4.7μm和6.8μm激光,通过改变气溶胶粒子粒径,得到不同参数对4种典型气溶胶粒子的效率因子与散射相函数的影响规律。仿真结果表明:激光粒径和波长影响气溶胶粒子的效率因子和散射相函数,粒径越大,其效率因子越趋于稳定,气溶胶粒子的后向散射能力越弱;波长越长,不同气溶胶效率因子峰值的变化不同,但峰值对应的粒径越大。In the battlefield environment,the detection ability of pulsed laser fuze is easily interfered by aerosol particles,causing false alarms and missing alarms.In order to study the laser transmission characteristics of pulsed laser fuze in aerosol,the extinction and scattering characteristics of sand-dust aerosol particles,water-soluble aerosol particles,marine aerosol particles and soot aerosol particles were modeled and simulated based on Mie scattering theory.The influences of different parameters on the efficiency factors and scattering phase functions of four typical aerosol particles were obtained by changing the particle size at 0.905μm,4.7μm and 6.8μm laser wavelengths.The simulated results show that the particle size and wavelength affect the efficiency factor and scattering phase function of aerosol particles.The larger the particle size is,the more stable the efficiency factor is,and the weaker the backscattering ability of aerosol particles is.If the wavelength is longer,the change in the peak of the aerosol efficiency factor is different,but the particle size corresponding to the peak is larger.

关 键 词：激光 MIE散射理论 气溶胶粒子 效率因子 散射相函数 

分 类 号：TJ439.2[兵器科学与技术—火炮、自动武器与弹药工程]