Characterization and Application of Underwater Extremely Low Frequency Magnetic Fields

YUE Ruiyong; JIANG Kaina; WU Yuanzhe; ZHAO Zhe

doi:10.11993/j.issn.2096-3920.2023-0065

Volume 31 Issue 4

Aug 2023

Turn off MathJax

Article Contents

Article Navigation > Journal of Unmanned Undersea Systems > 2023 > 31(4): 559-567

YUE Ruiyong, JIANG Kaina, WU Yuanzhe, ZHAO Zhe. Characterization and Application of Underwater Extremely Low Frequency Magnetic Fields[J]. Journal of Unmanned Undersea Systems, 2023, 31(4): 559-567. doi: 10.11993/j.issn.2096-3920.2023-0065

Citation:

YUE Ruiyong, JIANG Kaina, WU Yuanzhe, ZHAO Zhe. Characterization and Application of Underwater Extremely Low Frequency Magnetic Fields[J]. Journal of Unmanned Undersea Systems, 2023, 31(4): 559-567. doi: 10.11993/j.issn.2096-3920.2023-0065

Citation:

PDF( 5088 KB)

Characterization and Application of Underwater Extremely Low Frequency Magnetic Fields

doi: 10.11993/j.issn.2096-3920.2023-0065

1.
Science and Technology on Underwater Test and Control Laboratory, Dalian 116013, China
2.
Dalian Institute of Measurement and Control Technology, Dalian 116013, China

Received Date: 2023-05-22
Accepted Date: 2023-07-06
Rev Recd Date: 2023-06-06

Available Online: 2023-07-13

Abstract

Abstract

Underwater extremely low frequency magnetic field mainly comes from the rotation of the ship’s stern shaft and has obvious line spectrum characteristics, long propagation distance, and strong correlation with the ship’s motion in marine environments, which can be used as a feature source of non-acoustic detection. The study of underwater extremely low frequency magnetic field models, propagation, and spatial distribution properties is of great value in promoting applications of extremely low frequency magnetic field detection. Shaft-rate magnetic field is an important component of underwater extremely low frequency magnetic field. In this paper, the generation mechanism of the shaft-rate magnetic field was analyzed, and the time-harmonic dipole model of the shaft-rate magnetic field generated by the corrosion current under the effect of internal modulation was established. The propagation and spatial distribution characteristics of the shaft-rate magnetic field in the marine environment were simulated, and the decay law of the shaft-rate magnetic field was initially given. The dipole model was validated by the controlled simulation source sea test. The results show that the shaft-rate magnetic field generated by the horizontal time-harmonic electric dipole has the largest energy in the horizontal component, followed by the vertical component, and the energy in the longitudinal component is the smallest. At the same time, the shaft-rate magnetic field has a certain directional distribution, and the detection utilizing the horizontal and vertical components can effectively make up the detection blind area by a single component. The multi-path propagation characteristics of the shaft-rate magnetic field generated by the horizontal time-harmonic electric dipole in the shallow water environment exist, and they are dominated by direct and reflected waves in the near region and by direct waves from the sea surface in the far region. The frequency characteristics of the shaft-rate magnetic field are correlated with the ship’s speed and number of blades, which can be used as an effective feature for target identification. The above conclusions can provide support for the identification of extremely low frequency magnetic field detection.

FullText(HTML)

References(11)

References

[1]	吕俊军, 陈凯, 苏建业, 等. 海洋中的电磁场及其应用[M]. 上海: 上海科学技术出版社, 2020.
[2]	Zolotarevskii Y, Bulygin F, Ponomarev A, et al. Methods of measuring the low-frequency electric and magnetic fields of ships[J]. Measurement Techniques, 2005, 48(11): 1140-1144. doi: 10.1007/s11018-006-0035-6
[3]	Fares S A, Fleming R, Dinn D, et al. Horizontal and vertical electric dipoles in a two-layer conducting medium[J]. Antennas and Propagation, IEEE Transactions on, 2014, 62(11): 5656-5665. doi: 10.1109/TAP.2014.2355295
[4]	张朔宁, 何展翔. 水下动目标轴频电磁场特征研究[C]// 2021年中国地球科学联合学术年会论文集(九). 珠海: 北京伯通电子出版社, 2021: 74-77.
[5]	贾定宇, 翁爱华, 刘云鹤, 等. 海洋环境中水平电偶极子电磁场特征分析[J]. 地球物理学进展, 2013, 28(1): 507-514. Jia Dingyu, Weng Aihua, Liu Yunhe, et al. Propagation of electromagnetic fields from a horizontal electrical dipole buried in ocean[J]. Progress in Geophysics, 2013, 28(1): 507-514.
[6]	毛伟, 林春生. 两层介质中运动水平时谐偶极子产生的电磁场[J]. 兵工学报, 2009, 30(5): 555-560. Mao Wei, Lin Chunsheng. The EM fields produced by a moving horizontally-directed time-harmonic dipole in two-layer media[J]. Acta Armamentarii, 2009, 30(5): 555-560.
[7]	庞鑫, 刘忠乐, 文无敌, 等. 基于水平时谐电偶极子模型的舰船轴频磁场传播特性分析[J]. 兵器装备工程学报, 2021, 42(12): 183-187. Pang Xin, Liu Zhongle, Wen Wudi, et al. Analysis of ship shaft frequency magnetic field propagation characteristics based on horizontal time-harmonic electric dipole model[J]. Journal of Ordnance Equipment Engineering, 2021, 42(12): 183-187.
[8]	孙玉绘, 林春生, 吴海兵, 等. 浅海中时谐水平电偶极子在空气中的极低频磁场[J]. 国防科技大学学报, 2018, 40(3): 82-87. Sun Yuhui, Lin Chunsheng, Wu Haibing, et al. Extremely low frequency magnetic fields in air produced by time-harmonic horizontal electric dipole in shallow sea[J]. Journal of National University of Defense Technology, 2018, 40(3): 82-87.
[9]	张立琛, 王英民, 陶林伟. 舰船腐蚀相关轴频电磁场场源建模[J]. 哈尔滨工程大学学报, 2017, 38(10): 1525-1530. Zhang Lichen, Wang Yingmin, Tao Linwei. Research on the modelling of the ship corrosion related shaft-rate electromagnetic field[J]. Journal of Harbin Engineering University, 2017, 38(10): 1525-1530.
[10]	Lin P F, Zhang N, Chang M, et al. Research on the model and the location method of ship shaft-rate magnetic field based on rotating magnetic dipole[J]. IEEE Access, 2020, 8: 162999-163005. doi: 10.1109/ACCESS.2020.3021206
[11]	徐震寰, 李予国, 罗鸣. 船舶轴频电磁场信号的海底测量及其特性分析[J]. 哈尔滨工程大学学报, 2018, 39(4): 652-657. Xu Zhenhuan, Li Yuguo, Luo Ming. Seabed survey and property analysis of ship’s shaft-rate electromagnetic signal[J]. Journal of Harbin Engineering University, 2018, 39(4): 652-657.