基于光锥扩束机理的单脉冲激光近程静态探测方法  

Short-range static detection method of single pulse laser based on light cone beam expansion mechanism

作　　者：甘霖[1] 张合[1] Gan Lin;Zhang He(Intelligent ammunition of Ministerial Key Laboratory,Nanjing University of Science and Technology,Nanjing 210094,China)

机构地区：[1]南京理工大学智能弹药技术国防重点学科实验室,南京210094

出　　处：《仪器仪表学报》2023年第5期150-159,共10页Chinese Journal of Scientific Instrument

基　　金：国家自然科学基金(51605227);南京理工大学本科生科研训练计划立项资助。

摘　　要：针对激光近程全向探测问题,在激光近程动态周向扫描探测机理研究基础上,提出了基于光锥扩束机理的单脉冲激光近程静态周向探测方法。基于激光近场探测理论和静态探测场空间几何分布,推导出基于光锥扩束机理的单脉冲激光近程静态探测回波方程。构建了单脉冲激光近程测距概率分布模型并搭建了实验室静态探测实验平台,研究了脉冲激光发射功率、倒置反射光锥角、脉冲激光束发散角和目标尺寸投影面积对激光近程周向探测概率分布的影响机制。结果表明:随着发射功率和目标投影尺寸分别从10 W和0.01 m~2增加到30 W和0.25 m~2,回波信号幅值亦随之从0.16和0.43μV提升到4.22和5.95μV,随着倒置反射光锥角和光束发散角分别从30°和10 mrad增加到120°和30 mrad,回波信号幅值随之从3.18和2.52μV降低到0.88和1.92μV;周向探测概率分布随着发射功率和目标投影尺寸的增加而半宽减小且峰值增加并向左偏离、随着倒置反射光锥角和光束发散角的增加半宽增大且峰值降低并向右偏离;探测分布对称性并不受以上4种因素影响。The problem of laser short-range omnidirectional detection is considered.Based on the research of laser short-range dynamic circumferential scanning detection mechanism,a single-pulse laser short-range static circumferential detection method based on light cone beam expansion mechanism is proposed.Based on the theory of laser near-field detection and the spatial geometric relationship of static detection field,the echo equation of single pulse laser short-range static detection using the mechanism of light cone expansion is derived.The probability distribution model of single pulse laser short-range ranging is formulated and the laboratory static detection experiment is established.The influence mechanism of pulse laser emission power,inverted reflection cone angle,pulse laser beam divergence angle and target size projection area on the probability distribution of laser short-range circumferential detection is studied.The results show that as the transmit power and the target projection size increase from 10 W and 0.01 m~2 to 30 W and 0.25 m~2,the echo signal amplitude also increases from 0.16 and 0.43 μV to 4.22 and 5.95 μV.As the inverted reflective cone angle and beam divergence angle increase from 30° and 10 mrad to 120° and 30 mrad,the echo signal amplitude decreases from 3.18 and 2.52 μV to 0.88 and 1.92 μV.The circumferential detection probability distribution decreases with the increase of the transmission power and the target projection size,and the peak increases and deviates to the left.With the increase of the inverted reflected light cone angle and the beam divergence angle,the half width increases and the peak decreases and deviates to the right.The symmetry of detection distribution is not affected by the above 4 factors.

关 键 词：近程探测 单脉冲激光 光锥扩束 概率分布 

分 类 号：TH74[机械工程—光学工程]