基于不同材质气溶胶下激光回波特性研究  

Study on laser echo characteristics based on aerosol of different materials

作　　者：李婷 赵旭[1] 李连鹏[1] LI Ting;ZHAO Xu;LI Lian-peng(Beijing Key Laboratory of High Dynamic Navigation Technology,Beijing Information Science&Technology University,Beijing 100192,China)

机构地区：[1]北京信息科技大学高动态导航技术北京市重点实验室,北京100192

出　　处：《激光与红外》2023年第7期1010-1018,共9页Laser & Infrared

基　　金：国家重点研发计划项目(No.2020YFC1511702)资助。

摘　　要：激光引信易受到气溶胶的干扰,造成引信的虚警,对激光抗气溶胶干扰的研究一直是亟待解决的难题。大气环境中气溶胶的组分是多样的,因此研究不同材质气溶胶的激光回波具有重要意义,而烟雾和云雾是不同材质气溶胶的典型代表。本文基于Mie散射理论和蒙特卡罗随机逻辑方法,分别建立了激光烟雾、云雾单次和多次散射模型,对比分析了不同脉冲宽度10 ns、20 ns和50 ns的光束、不同材质气溶胶烟雾和云雾、不同散射次数的回波特性,得到了不同脉冲宽度激光在不同材质气溶胶下的散射回波规律。仿真结果表明:激光发射脉冲宽度越小和气溶胶能见度越大,目标回波和气溶胶回波的区分效果越好;激光在云雾中的透过率高于烟雾,反射率低于烟雾;激光在烟雾中的衰减度高于云雾。该结论可为研究激光引信在气溶胶环境下后向散射回波特性和提高抗干扰能力提供了研究思路。Laser fuze is susceptible to aerosol interference,which causes false alarm in the fuze.The research of laser anti aerosol interference is always a difficult problem to be solved.The components of aerosols in the atmospheric environment are diverse,so it is of great significance to study the laser echo of aerosols with different materials,and smoke and cloud are typical representatives of aerosols of different materials.In this paper,based on Mie scattering theory and Monte Carlo random logic method,single and multiple scattering models of laser smoke and cloud fog are established respectively.The echo characteristics of laser with different pulse widths of 10 ns,20 ns and 50 ns,different materials of aerosol smoke and cloud,and different scattering times arecompared and analyzed,and the scattering echo law of laser with different pulse widths under different materials of aerosol is obtained.The simulation results show that the smaller the laser emission pulse width and the greater the aerosol visibility,the better the discrimination effect between target echo and aerosol echo;the transmittance of laser in cloud is higher than that of smoke,and the reflectivity is lower than that of smoke;the attenuation degree of laser in smoke is higher than that in cloud particles.This conclusion can provide a research idea for studying the back-scattering echo characteristics of laser fuze in aerosol environment and improving the anti-interference capability.

关 键 词：激光引信 气溶胶 散射模型 回波 衰减度 

分 类 号：TJ95[兵器科学与技术—武器系统与运用工程] TN249[电子电信—物理电子学]