脉冲激光引信烟尘环境回波模拟计算方法

Jiaqian, 包家倩 Bao; Bingting, 查冰婷 Zha; He, 张合 Zhang; Chenyoushi, 徐陈又诗 Xu

doi:10.3788/irla20200319

红外与激光工程

2021

DOI: 10.3788/irla20200319

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脉冲激光引信烟尘环境回波模拟计算方法

包家倩 Bao Jiaqian¹,

查冰婷 Zha Bingting²,

张合 Zhang He³

et al.

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2024

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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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Detection of linear frequency modulation laser in high concentration smoke environments

Ding,

Qu,

Zhang

et al. 2024

Opt. Eng.

View full text Add to dashboard Cite

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Echo characteristics of pulsed lasers in non-uniform smoke environments

Xu,

Zha,

Zhang

et al. 2024

Opt. Express

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This work establishes a pulsed laser backscattering echo signal model based on an improved semi-analytical Monte Carlo method. The developed model is applied in non-uniform smoke environments to mitigate the smoke interference of laser fuzes for ground proximity detection. The model considers variations of the photon step size according to the concentration of the smoke environment, and the computational speed is accelerated by implementing an improved semi-analytical reception method. The proposed echo signal model is employed to investigate the effects of smoke-related parameters and laser detection system parameters on the backscattering echo waveform of smoke. Finally, the model is validated based on experiments. The results show that the intensity of the smoke backscattering echo and the emission pulse width approximately conform to a logarithmic relationship. Specifically, the echo intensity is positively correlated with the emission pulse width, and the ratio of the time between the rising edge and the falling edge of the echo signal is positively correlated with the pulse width. Meanwhile, the intensity of the smoke backscattering echo and the distance between the transmitter and receiver approximately adopt an exponential relationship. Herein, we describe the characteristics of a laser backscattering echo in a non-uniform smoke environment. The results can guide future research regarding laser fuze detection methods and strategies relevant for ground targets in smoke environments.

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脉冲激光引信烟尘环境回波模拟计算方法

Cited by 2 publications

References 0 publications

Detection of linear frequency modulation laser in high concentration smoke environments

Detection of linear frequency modulation laser in high concentration smoke environments

Echo characteristics of pulsed lasers in non-uniform smoke environments

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