线性调频脉冲激光引信烟雾回波特性
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作者单位:

1.西安电子科技大学;2.中国电子科技集团公司第十一研究所;3.西安机电信息技术研究所

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中图分类号:

TN249

基金项目:

装备预研领域基金项目(61404160201)


Characteristics simulation of LFM pulse laser fuse backscattering signals
Author:
Affiliation:

1.Xidian University;2.The 11th Research Institute of China Electronics Technology Group Corporation;3.Xi'an Electromechanical Information Technology Research Institute

Fund Project:

Equipment pre research field fund project( 61404160201)

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    摘要:

    为了提高激光引信对烟雾环境适应的能力,研究了线性调频脉冲激光引信的烟雾回波特性。通过对蒙特卡洛算法进行计算速度优化建立了烟雾中激光散射模型,研究了烟雾后向散射波形变化规律和影响探测性能的因素。结果表明:线性调频脉冲在烟雾中的回波信号由烟雾低频、烟雾高频、目标信号三种叠加而成。当烟雾浓度1.4 mg/m3时,目标信号完全被衰减。虽然烟雾低频对目标信号检测影响不大,但是当烟雾浓度大于1.2 mg/m3时,烟雾高频和目标信号频谱混叠导致激光引信产生虚警信号。与传统脉冲激光相比线性调频脉冲激光可以适应更高浓度烟雾,并且带宽越宽抗烟雾干扰能力越强。该研究结果对线性调频脉冲激光引信的设计和信号处理具有重要支撑。

    Abstract:

    In order to improve the adaptability of laser fuze in smoky environment, the echoing characteristics of linear frequency modulated(LFM) pulse laser fuze is studied. The laser scattering model in smoke is established by optimizing the calculation speed of Monte Carlo algorithm. The results show that: The echoing signal of LFM pulse in smoke is composed of three types. They are low-frequency, high-frequency and target signal. When the smoke concentration is 1.4 mg/m3, the target signal is completely attenuated. Although the low frequency of smoke has little effect on target signal detection, when the smoke concentration is greater than 1.2 mg/m3, the aliasing of smoke high frequency and target signal spectrum causes the laser fuse to generate false alarm signals. Compared with traditional pulse lasers, LFM pulse lasers can adapt to higher concentrations of smoke. The wider the bandwidth, the stronger the ability to resist smoke interference. The research results provide important support for the design and signal processing of LFM pulse laser fuses.

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  • 收稿日期:2023-03-17
  • 最后修改日期:2023-07-01
  • 录用日期:2023-07-12
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