关键词: 引信回波, 信噪比, 阈值去噪, 幅值提取

Abstract:

In view of the fact that the laser fuze is easy to be interfered by fog and smoke,a method of anti-interference based on dual-wavelength detection is proposed in this paper.The scattering characteristic of single aerosol particle to dual-wavelength laser is researched.The scattering echo both by analysis and measurement are given.Reflectivity of some metal and nonmetal targets to dual-wavelength laser is practically measured.The analytic and experimental results show that the scattering characteristic of fog and smoke particles to dual-wavelength laser are different,while the ratio of backscattering power is usually more than 2.The reflectivity of targets to dual-wavelength laser is nearly the same,while the ratio of reflected power is about 1.Using information of backscattering power ratio in signal processing is a new approach to anti-interference for laser fuze.

Key words: laser fuze;dual wavelength detection;aerosol scattering;target reflection