水下小目标中低频声散射特性分析及试验

赵德鑫; 沈同圣; 李秀坤; 金 鑫; 陈迎亮

doi:10.11993/j.issn.2096-3920.2020.04.002

水下小目标中低频声散射特性分析及试验

doi: 10.11993/j.issn.2096-3920.2020.04.002

1.
国防科技创新研究院前沿交叉技术研究中心, 北京, 100071
2.
哈尔滨工程大学水声技术重点实验室, 黑龙江哈尔滨, 150001
3.
中国船舶重工集团公司第705研究所昆明分部, 云南昆明, 650032

基金项目: 国家自然科学基金项目资助(51809274)

详细信息

作者简介:
赵德鑫(1984-), 男, 博士, 助理研究员, 主要研究方向为AUV水下探测技术.

中图分类号: TP242.6 TB566
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出版历程
- 刊出日期: 2020-08-31

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

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

摘要

摘要: 自主探测与识别水下小目标(水雷、爆炸物等)是自主水下航行器(AUV)的主要应用方式, 也是近年来水下无人系统智能化发展的一个重要方向。与传统的仅利用目标高频反向散射特性的探测方法相比, 双/多基地探测具有布阵灵活、抗干扰强、可获得的目标信息丰富等优点, 但如何利用目标中低频全方位的散射特性进行探测与识别还有待进一步研究。文中首先分析了水下目标的声散射机理, 介绍了利用AUV搭载的小孔径声呐, 采用双基地模式, 基于目标散射声场探测与识别水下小目标的方法; 然后基于COMSOL多物理场平台的有限元数值计算方法, 完成了多种频率的水下悬浮目标散射声场计算, 论述了利用中低频散射场的三维特性识别水下目标的可行性; 最后通过2种类型目标的散射声场采集水池试验, 初步论证了利用小孔径声呐采集与处理中低频水下目标散射声波是可行的。文中研究可为基于中低频声散射特性的检测和识别的进一步研究提供参考。
- 自主水下航行器 /
- 中低频 /
- 声散射 /
- 水下小目标 /
- 小孔径声呐
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.
- autonomous undersea vehicle(AUV) /
- low-/mid-frequency /
- acoustic scattering /
- small underwater target /
- small aperture sonar

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参考文献(18)

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