基于蒙特卡罗法的激光引信云雾回波信号研究

Monte-Carlo Based Backscattering Signal of Clouds and Fogs for Laser Fuse

在激光引信中，云雾后向散射效应会产生引发虚警的回波信号。基于蒙特卡罗法，对云雾回波信号进行了模拟，并分析了激光引信结构特征及脉冲信号特征的影响。结果表明：增加盲区距离对克服一次散射的效果较为明显，对克服多次散射的效果相对较差；回波信号的最大幅度随发射矩形脉冲宽度的增大而增大，而当脉冲宽度增大到一定值（约20～30ns）时，其最大幅度与脉冲宽度无关。

Scattering effects of clouds and fogs produce backscattering signal which results in false alarm for laser fuse. Based on the Monte-Carlo method, backscattering signal of clouds and fogs is simulated, the effects of laser fuse and laser pulse on backscattering signal are analyzed. The results show that extending blind distance is an effective way to mitigate single-scattering effect, but not to mitigate multiple- scattering effect. The maximal range of backscattering signal increases along with the increase of rectangular pulse width, but is foreign to pulse width when pulse width increasing to a certain value of 20 -30 ns.