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Volume 28 Issue 4
 
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Article Navigation >  Journal of Unmanned Undersea Systems  > 2020  >  28(4): 359-369
ZHAO De-xin, SHEN Tong-sheng, LI Xiu-kun, JIN Xin, CHEN Ying-liang. Analysis and Test of Low-/Mid-Frequency Acoustic Scattering Characteristics of Small Underwater Target[J]. Journal of Unmanned Undersea Systems, 2020, 28(4): 359-369. doi: 10.11993/j.issn.2096-3920.2020.04.002
Citation: ZHAO De-xin, SHEN Tong-sheng, LI Xiu-kun, JIN Xin, CHEN Ying-liang. Analysis and Test of Low-/Mid-Frequency Acoustic Scattering Characteristics of Small Underwater Target[J]. Journal of Unmanned Undersea Systems, 2020, 28(4): 359-369. doi: 10.11993/j.issn.2096-3920.2020.04.002
shu

Analysis and Test of Low-/Mid-Frequency Acoustic Scattering Characteristics of Small Underwater Target

doi: 10.11993/j.issn.2096-3920.2020.04.002
  • 1.

    Advanced Interdisciplinary Technology Research Center, National Innovation Institute of Defense Technology, Beijing 100071, China

  • 2.

    Acoustic Science and Technology Laboratory, Harbin Engineering University, Harbin 150001, China

  • 3.

    The 705 Research Institute Kunming Branch, China Shipbuilding Industry Corporation, Kunming 650032, China

  • Publish Date: 2020-08-31
    Abstract
  • Autonomous detection and identification of small underwater targets(such as mine and explosives) is one of the main applications of autonomous undersea vehicle(AUV), and is also an important development direction of intelligentization of unmanned undersea systems in recent years. Compared with the traditional detection method that only uses the high frequency backscattering characteristics of the target, bistatic/multistatic detection has the advantages of flexible array arrangement, strong anti-interference performance and abundant available target information, etc. To make use of the omnidirectional low-/mid-frequency scattering characteristics of targets for detection and identification, the acoustic scattering mechanism of underwater target is analyzed theoretically, and the method of using the AUV-borne small aperture sonar with bistatic mode to detect and identify small underwater target based on the scattered acoustic field is introduced. Then, based on the finite element numerical calculation method of the COMSOL multi-physical field platform, the scattered acoustic field calculation of underwater suspended target with various frequencies is completed, and the feasibility of using the three-dimensional characteristic of low-/mid-frequency scattered field to identify underwater target is discussed. Finally, the feasibility of using small aperture sonar to collect and process the low-/mid-frequency scattered acoustic waves of underwater targets is demonstrated through water-tank experiment of scattered acoustic field collection of two kinds of targets. This study may provide a reference for further research on detection and identification based on the characteristics of low-/mid-frequency acoustic scattering.

     

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