Estimation and Utilization of the Geomagnetic Field Inhomogeneities Using the Relaxation Characteristics of the FID Signal in an Overhauser Magnetometer

Luo, Wang; Hu, Xiangyun; Dong, Haobin; Ge, Jian; Liu, Lichao; Feng, Ke; Zhang, Yongchao; Huang, Lishan; She, Jinhua

doi:10.1109/tim.2024.3369140

IEEE Trans. Instrum. Meas.

2024

DOI: 10.1109/tim.2024.3369140

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Estimation and Utilization of the Geomagnetic Field Inhomogeneities Using the Relaxation Characteristics of the FID Signal in an Overhauser Magnetometer

Wang Luo,

Xiangyun Hu,

Haobin Dong

et al.

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Development of a High-Precision Deep-Sea Magnetic Survey System for Human-Occupied Vehicles

Zhang,

Zhou,

Deng

et al. 2024

Electronics

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The high-precision magnetic survey system is crucial for ocean exploration. However, most existing systems face challenges such as high noise levels, low sensitivity, and inadequate magnetic compensation effects. To address these issues, we developed a high-precision magnetic survey system based on the manned submersible “Deep Sea Warrior” for deep-ocean magnetic exploration. This system incorporates a compact optically pumped cesium (Cs) magnetometer sensor to measure the total strength of the external magnetic field. Additionally, a magnetic compensation sensor is included at the front end to measure real-time attitude changes of the platform. The measured data are then transmitted to a magnetic signal processor, where an algorithm compensates for the platform’s magnetic interference. We also designed a deep pressure chamber to allow for a maximum working depth of 4500 m. Experiments conducted in both indoor and field environments verified the performance of the proposed magnetic survey system. The results showed that the system’s sensitivity is ≤0.5 nT, the noise level of the magnetometer sensor is ≤1 pT/√Hz at 1 Hz, and the sampling rate is 10 Hz. The proposed system has potential applications in ocean and geophysical exploration.

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Development of a High-Precision Deep-Sea Magnetic Survey System for Human-Occupied Vehicles

Zhang,

Zhou,

Deng

et al. 2024

Electronics

View full text Add to dashboard Cite

show abstract

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Estimation and Utilization of the Geomagnetic Field Inhomogeneities Using the Relaxation Characteristics of the FID Signal in an Overhauser Magnetometer

Cited by 1 publication

References 27 publications

Development of a High-Precision Deep-Sea Magnetic Survey System for Human-Occupied Vehicles

Development of a High-Precision Deep-Sea Magnetic Survey System for Human-Occupied Vehicles

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