Research on the characteristics of fog backscattering laser echo

Fengjie, 王凤杰 Wang; Huimin, 陈慧敏 Chen; Chao, 马超 Ma; Yinyu, 龙胤宇 Long

doi:10.3788/irla201847.0506002

Cited by 2 publications

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“…on the backscattering echo characteristics, and analyzed the influence of various macroscopic characteristics caused by the microscopic characteristics of aerosol particles on the backscattering echo. Wang [4][5][6] analyzed the backscattering echo characteristics of pulsed laser fuze in clouds and fog. Li [7] used Monte Carlo modeling to analyze the echo characteristics of the target to laser with different pulse widths under cloud and fog environment.…”

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confidence: 99%

Effect of a typical smoke screen on pulsed laser fuze echoes

Chen

岳²,

陈³

2023

Ninth Symposium on Novel Photoelectronic Detection Technology and Applications

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In order to analyze the backscattering characteristics of pulsed laser fuze in typical smoke, copper powder and iron powder with a particle size range of 3~15 μm were selected, the detection model of pulsed laser fuzes in typical smoke was established based on Mie scattering theory and Monte Carlo method. The pulsed laser fuze is simulated to scatter echoes behind smoke curtains with different detection distances, different smoke screen thicknesses and different emitting laser pulse widths, and the echo intensities of copper powder smoke screens and iron powder smoke screens under the same smoke screen conditions are compared. The results show that the normalized echo intensity of copper powder smoke screen and iron powder smoke screen is negatively correlated with the detection distance. It is positively correlated with smoke screen thickness and emitted laser pulse width. In addition, under the same smoke screen environmental conditions, the echo intensity of the iron powder smoke screen is significantly stronger than that of the copper powder smoke screen, which can be explained that compared with the iron powder, copper powder is more suitable for use as a smoke generator material, the result can provide support for the anti-smoke interference of the laser fuze.

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confidence: 99%

Effect of a typical smoke screen on pulsed laser fuze echoes

Chen

岳²,

陈³

2023

Ninth Symposium on Novel Photoelectronic Detection Technology and Applications

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Detection of linear frequency modulation laser in high concentration smoke environments

Ding,

Qu,

Zhang

et al. 2024

Opt. Eng.

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In a smoke environment, smoke-suspended particles scatter and absorb laser photons. Smoke not only attenuates the target echo signal but also forms backward scattering. It interferes with the extraction and recognition of the target signal and brings great difficulties to the laser fuze detection. This article establishes a simulation model of the echo of a linear frequency modulation (LFM) pulse laser fuze in a smoke environment based on an improved Monte Carlo and multi-layer perceptron method. While ensuring the simulation accuracy, the echo simulation speed is greatly improved. Meanwhile, the precise ranging of the LFM pulse laser fuze was achieved using the pulse compression Butterworth filter signal extraction algorithm. In low concentration smoke interference environments, the backward scattering interference signal of smoke can be completely removed. The target signal is completely attenuated in interference environments with smoke concentrations greater than 1.4 mg∕m 3 . Smoke interference is present but has a small amplitude and can be excluded by an appropriate threshold. The LFM pulsed laser regime outperforms the pulsed regime in high concentrations of smoke. The research results provide important support for the application of an LFM laser instead of a pulse laser in the field of fuze.

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Research on the characteristics of fog backscattering laser echo

Cited by 2 publications

References 0 publications

Effect of a typical smoke screen on pulsed laser fuze echoes

Effect of a typical smoke screen on pulsed laser fuze echoes

Detection of linear frequency modulation laser in high concentration smoke environments

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