A Novel Underwater Target Detection Method Based on Low-Frequency Magnetic Signal Generated by Portable Transmitter

Wang, Chen; Cui, Yong; Song, Xiao; Zhang, Yichao; Yuan, Zhihong

doi:10.1109/jsen.2023.3253708

Cited by 4 publications

(1 citation statement)

References 42 publications

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“…As a non-acoustic detection technology, underwater magnetic detection plays an irreplaceable role in geoscience, especially in oceanography [1,2]. With the rapid development of marine observation and exploration, unmanned underwater vehicles (UUVs) have become attractive underwater carriers for a variety of sensors and navigation equipment [3].…”

Section: Introductionmentioning

confidence: 99%

Velocity-Related Magnetic Interference Compensation of Unmanned Underwater Vehicle

Luo,

Pan,

et al. 2023

Remote Sensing

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Underwater magnetic detection based on unmanned underwater vehicles (UUVs) is an important approach for marine exploration and monitoring. Due to the interference of the carrier magnetic field, the detection accuracy is severely limited. To improve the performance of magnetic detection, various compensation methods have been developed. However, the compensation effectiveness of these methods is greatly diminished when UUVs sail at different velocities. In this paper, we propose a velocity-related interference magnetic compensation method that enhances the conventional Tolles–Lawson model. By introducing a velocity-related term and combining the ridge regression with the linear fitting algorithm, we determine the compensation parameters for various UUV velocities. Field experiments are conducted to verify the effectiveness of the proposed method. The results show that the root mean square error of the total magnetic field after compensation is reduced from 246.90 nT to 2.23 nT. Our study demonstrates that the velocity-related compensation method can significantly improve the accuracy of interference magnetic compensation under different UUV velocities, making it applicable to actual underwater magnetic detection.

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Section: Introductionmentioning

confidence: 99%

Velocity-Related Magnetic Interference Compensation of Unmanned Underwater Vehicle

Luo,

Pan,

et al. 2023

Remote Sensing

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Piezo‐Turned Magnet Rotation for ELF/SLF Cross‐Medium Communication in Omni‐Direction

Zhu,

Cheng,

et al. 2024

Advanced Optical Materials

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Extremely/super low frequency (ELF/SLF) electromagnetic (EM) waves offer efficient propagation in challenging cross‐medium environments. However, conventional coil antennas, when emitting ELF/SLF EM waves, face constraints related to size, radiation efficiency, and high power consumption. To overcome these limitations, a disc‐rod structured piezoelectric rotating resonator is proposed, which can turn a NdFeB permanent magnet disc into rotation with an impressive high‐speed up to 10 000 r min−1 via wobbling motion of the rod tip, effectively generating ELF/SLF magnetic field radiation via rotational oscillation other than common linear and swinging oscillation of the magnetic dipole moments. The piezo‐turned magnetic rotation (PTMR) method leads to a two to five‐fold enhancement in magnetic field emission compared to existing piezo‐actuated acoustic resonant antennas, and a 370 times higher emitting efficiency compared to the traditional coil antenna with a comparable size. In contrast to unidirectional EM wave radiation at their solely resonant frequencies, the PTMR antenna showcases omnidirectional B‐field radiation with continuous tunability in a dual frequency band spanning from 10 to 100 Hz. Moreover, an air–seawater cross‐medium magnetic field communication is successfully demonstrated. With outstanding performance metrics, the PTMR antenna emerges as a promising solution for efficient long‐distance ELF/SLF cross‐medium communication.

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Electromagnetic field produced by radiation source submerged in non-homogeneous seawater

Wang,

Ren,

Yang

2024

Sci Rep

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A Novel Underwater Target Detection Method Based on Low-Frequency Magnetic Signal Generated by Portable Transmitter

Cited by 4 publications

References 42 publications

Velocity-Related Magnetic Interference Compensation of Unmanned Underwater Vehicle

Velocity-Related Magnetic Interference Compensation of Unmanned Underwater Vehicle

Piezo‐Turned Magnet Rotation for ELF/SLF Cross‐Medium Communication in Omni‐Direction

Electromagnetic field produced by radiation source submerged in non-homogeneous seawater

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