激光引信云雾后向散射的特征与识别

Characteristics and Discrimination of Cloud Backscatter for Laser Fuze

研究了激光引信云雾后向散射的特征与识别。首先提出了云雾后向散射信号的数学模型,然后论述了光子一次散射条件下云雾气溶胶介质信号基本特性、多次散射对于反射信号幅值生成的影响、脉冲宽度和形状对后向散射信号幅值的影响、云雾后向散射信号的统计特性。从抑制云雾后向散射的角度,着重论述这些特性与激光引信参数的相互关系并指出设计方向。归纳了三种云雾后向散射的识别方法:简单的幅度识别,回波脉冲波形宽度识别以及表征目标与云雾轮廓的回波序列峰值包络图形识别。在分析比较后,提出应大力研发微宝石脉冲激光引信与新型电光扫描激光引信。

In this paper , characteristics and discrimination of cloud baekseatter for an laser fuze are studied. First, a mathematical model of cloud baekseatter is presented. Then basic characteristics of cloud backscatter are discussed under condition of photons single scattering. The effect of multiple - scattering on backseatter amplitude, effect of laser pulse width and shape on cloud baekseatter amplitude, statistic characteristics of cloud backscatter are also diseeussed. To restrain cloud bakescatte effect, these characteristics relative to laser fuze parameter are discussed specially. Three kinds of discrimination method are summarized ： simple amplitude discrimination , return pulse width discrimination , and received waveform sequence discrimination. After Comparison, it is concluded that yttrium - aluminum - garnet pulse laser fuze and new electric -optical seaning laser fuze should be developed actively.