基于太赫兹雷达的声致海面微动信号检测

邓彬 李韬 汤斌 易俊 王宏强 杨琪

邓彬, 李韬, 汤斌, 等. 基于太赫兹雷达的声致海面微动信号检测[J]. 雷达学报, 2023, 12(4): 817–831. doi: 10.12000/JR23117
引用本文: 邓彬, 李韬, 汤斌, 等. 基于太赫兹雷达的声致海面微动信号检测[J]. 雷达学报, 2023, 12(4): 817–831. doi: 10.12000/JR23117
DENG Bin, LI Tao, TANG Bin, et al. Feature detection of acoustically induced sea surface micro-motions with Terahertz radar[J]. Journal of Radars, 2023, 12(4): 817–831. doi: 10.12000/JR23117
Citation: DENG Bin, LI Tao, TANG Bin, et al. Feature detection of acoustically induced sea surface micro-motions with Terahertz radar[J]. Journal of Radars, 2023, 12(4): 817–831. doi: 10.12000/JR23117

基于太赫兹雷达的声致海面微动信号检测

DOI: 10.12000/JR23117
基金项目: 国家自然科学基金(61921001, 61971427, 62035014, 62201591)
详细信息
    作者简介:

    邓 彬,副研究员,主要研究方向为合成孔径雷达、太赫兹雷达微动与成像等

    李 韬,硕士生,主要研究方向为雷达信号处理

    汤 斌,博士生,主要研究方向为太赫兹雷达微动特征提取、太赫兹雷达ISAR成像等

    易 俊,助理研究员,主要研究方向为太赫兹高灵敏探测技术、太赫兹雷达成像技术等

    王宏强,研究员,主要研究方向为太赫兹技术、量子雷达和雷达目标特性

    杨 琪,副教授,主要研究方向为太赫兹雷达系统和ISAR信号处理等

    通讯作者:

    李韬 291011219@qq.com

    王宏强 oliverwhq@tom.com

  • 责任主编:郝程鹏 Corresponding Editor: HAO Chengpeng
  • 中图分类号: TN95

Feature Detection of Acoustically Induced Sea Surface Micro-motions with Terahertz Radar

Funds: The National Natural Science Foundation of China (61921001, 61971427, 62035014, 62201591)
More Information
  • 摘要: 水下声信号传播到水面时,由于水和空气的声阻抗差,会激发水表面横向微幅波,其振动信号包含了声源的相关信息。雷达通过目标回波间的相位差来检测目标的微小位移,因此可以利用雷达检测水面微小位移变化获取水面振动信号,进而反演水下声源信息。该文首先分析了水下声传播的衰减特性及水面振动的物理模型,然后基于雷达回波模型对声致水面振动检测进行理论分析,提出了小波-卡尔曼滤波信号检测方法,最后在大型综合消声水池和黄海水域开展了基于太赫兹雷达的声致水面微动信号检测实验。实验结果表明所用太赫兹雷达能够检测声致水面的细微振动,所提算法能有效滤除水面干扰和雷达相位噪声并提取振动信号。实验首次在二级海况下检测到了亚微米级的振动信号,为水-空跨介质信息传输与水下航行器探测提供了依据。

     

  • 图  1  振幅和衰减系数随频率变化示意图

    Figure  1.  Schematic of amplitude and attenuation coefficient as a function of frequency

    图  2  声致水面振动俯视及纵向剖面振幅示意图

    Figure  2.  Schematic diagram of top view and longitudinal profile amplitude of acoustic water surface vibration

    图  3  小波-卡尔曼滤波算法流程图

    Figure  3.  Flowchart of wavelet-Kalman filtering algorithm

    图  4  水池实验场景

    Figure  4.  Pool experiment scene

    图  5  发射信号示意图

    Figure  5.  Schematic diagram of the emitted signal

    图  6  122.5 GHz太赫兹雷达水下0.2 m声源无干扰单频信号处理结果

    Figure  6.  122.5 GHz Terahertz radar underwater 0.2 m sound source without interference single-frequency signal processing results

    图  7  微波雷达水下0.2 m声源无干扰单频信号处理结果

    Figure  7.  Microwave radar underwater 0.2 m sound source without interference single-frequency signal processing results

    图  8  太赫兹雷达探测水下0.2 m声源无干扰单频信号处理频率分析

    Figure  8.  Frequency analysis of interference-free single-frequency signal processing for Terahertz radar detection of underwater 0.2 m sound source

    图  9  0.2 m无干扰线性调频信号及BPSK信号处理结果

    Figure  9.  0.2 m interference-free linear FM signal and BPSK signal processing results

    图  10  0.5 m声源无干扰单频信号处理结果

    Figure  10.  0.5 m sound source without interference single-frequency signal processing results

    图  11  1.0 m声源无干扰单频信号处理结果

    Figure  11.  1.0 m sound source without interference single-frequency signal processing results

    图  12  0.2 m带干扰信号处理结果

    Figure  12.  0.2 m band interference signal processing results

    图  13  海面实验示意及场景图

    Figure  13.  Schematic and scene diagram of the sea surface experiment

    图  14  海面起伏距离像及振动信息

    Figure  14.  Sea surface undulation distance image and vibration information

    图  15  0.5 m处300~500 Hz单频信号处理结果

    Figure  15.  Results of 300~500 Hz single-frequency signal processing at 0.5 m

    图  16  二级海况下300 Hz信号处理结果

    Figure  16.  Results of 300 Hz signal processing in secondary sea state

    图  17  半物理法推算检测振幅

    Figure  17.  Semi-physical method to derive detection amplitude

    表  1  雷达实验参数设置

    Table  1.   Radar experiment parameter setting

    参数第1组第2组
    中心频率(GHz)122.524.5
    带宽(GHz)11
    扫频时间(ms)0.10.5
    扫频周期(ms)0.20.5
    采样频率(kHz)1000256
    波束宽度(°)130
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出版历程
  • 收稿日期:  2023-06-26
  • 修回日期:  2023-08-06
  • 网络出版日期:  2023-08-20
  • 刊出日期:  2023-08-28

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