Systems Engineering and Electronics ›› 2025, Vol. 47 ›› Issue (3): 720-729.doi: 10.12305/j.issn.1001-506X.2025.03.05

• Electronic Technology • Previous Articles    

Experimental verification research on the attenuation characteristics model of explosive infrared smoke screen

Juan LIN, Xijuan ZHU, Xingrun LIU, Haotong LI, Kaifeng WU, Yanbing DONG   

  1. Beijing Institute of Environmental Characteristics, Beijing 100854, China
  • Received:2024-02-04 Online:2025-03-28 Published:2025-04-18
  • Contact: Yanbing DONG

Abstract:

Red phosphorus smoke screen bomb is an effective interference method against infrared detection. The smoke screen bomb explodes and spreads to form a smoke screen. The attenuation distribution characteristics of smoke screen on the detected target are the basis for evaluating its shielding performance. The typical attenuation characteristics model of explosion infrared smoke screen includes a diffusion model for explosive smoke formation and a smoke screen transmittance calculation model based on Mie scattering theory. Based on this, experiments are designed and carried out to measure the microscopic optical characteristics of smoke screen and the infrared attenuation characteristics of red phosphorus smoke screen bomb in the field. The experimental results indicate that the particle size of the smoke screen is mainly concentrated in the range of 10-75 μm, and the shape tends towards spherical particles. Compared with the time-varying transmittance results obtained from field testing, the average relative error of the medium wave transmittance calculation results in smoke screen attenuation characteristics model is 16.3%, and the average relative error of the long wave transmittance is 15.8%. The fraction density of smoke screen components calculated by the diffusion model is consistent with the trend of the measured smoke screen transmittance. The calculation model results are consistent with the experimental data analysis. There is a certain deviation between the spherical assumption of smoke screen particles, the setting of component types in the article and the actual state. Further verification analysis of the three-dimensional physical field of smoke screen is needed to improve the smoke screen attenuation model.

Key words: smoke screen, red phosphorus, Mie scattering, transmittance, particle number density

CLC Number: 

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