Simulation of characteristics of cloud and fog echo for pluse laser fuze

Pulse laser fuze is susceptible to the interference of natural environment, such as cloud and fog, and easy to produce a false alarm. Therefore, this paper researches the cloud and fog echo characteristics of the pulse laser fuze. On the basis of Mie scattering theory, a pulse laser transmission model for the cloud and fog is established by using Monte Carlo simulation. The cloud and fog echoes in two conditions are simulated. The first condition is that both pulse laser fuze and target are in the inside of cloud and fog, and the other is that the target is in the inside of cloud and fog and the pulse laser fuze in the outside. At the first condition, the echo signals are acquired when the distance between pulse laser fuze and target is 10 m and the visibility are 1, 3, 5 and 10 m, respectively. At the second condition, the dynamic echo characteristics are obtained when the distance between pulse laser fuze and target is 10 m, the visibility is 3 m and the cloud and fog boundaries are 0, 1, 3, 5, 7and 9 m, respectively. Moreover, it analyzes the influences of cloud and fog parameters and position, on the cloud and fog echo, and the waveform difference of cloud and fog echo and target echo. This research provides the theoretical support for the anti-interference of pulse laser fuzes.