Processing of magnetic scalar gradiometer signals using orthonormalized functions

“…Magnetic anomaly detection (MAD) is a widespread technique used to determine the presence and some characteristics of visually obscured ferromagnetic objects by revealing the anomalies in the uniform geomagnetic field [1,2]. In general, the magnetic anomaly signal induced by the ferromagnetic object is rather weak for remote sensing applications.…”

Section: Introductionmentioning

confidence: 99%

Electronic method for suppressing output instability of GMI sensors caused by the orientation

Zhang

Pan

Zhuohang

et al. 2018

IEICE Electron. Express

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Abstract:Magnetic sensors based on the giant magneto-impedance effect (GMI sensors) have a promising application prospect in the field of magnetic anomaly detection for their high resolution. However, they are highly sensitive to its orientation without any magnetic shielding. A method that automatically adjusts the bias magnetic field to make it always work on its initial value is proposed in order to suppress output instability of GMI sensors caused by the orientation. The analog circuit implementing the method is designed according to the principle of feedback control. The experimental results demonstrated the effectiveness of the proposed method.

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“…Currently many shipborne and airborne magnetic probes are used to search submarine actively by several countries [1] . By analyzing the magnetic signal from the probe in motion, the submarine is detected and positioned [2][3] .In this paper, the magnetic field in a region is monitored by arranging the probe network. By methods of differential detection and technology of probes arrangement, the problem of geomagnetic interference is solved and detection range is optimized.…”

Section: Introductionmentioning

confidence: 99%

Methods of Differential Submarine Detection Based on Magnetic Anomaly and Technology of Probes Arrangement

Chen¹,

Yuan²

2015

Proceedings of the 2015 2nd International Workshop on Materials Engineering and Computer Sciences

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Abstract. Magnetic anomaly submarine detection methods detect submarines by the additional magnetic field generated by the ferromagnetic shell. Using a single magnetic measurement probe to detect submarines has difficult to overcome the background signal interference of geomagnetic field. So, this paper propose multi-probe method based on differential detection principle. It's advantage is that it can filter out the background noise, but as the magnetic field is directional, this approach has problem of blind zone. To overcome the problem of blind zone, this paper proposes two solutions. By comparing the submarine detection range of the two schemes, the detection system with four probes in two detection directions is demonstrated to have better detection effect, which overcomes the problem of blind zone and makes the detection distance farther.

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Processing of magnetic scalar gradiometer signals using orthonormalized functions

Cited by 112 publications

References 5 publications

Investigation of Advanced Data Processing Technique in Magnetic Anomaly Detection Systems

Investigation of Advanced Data Processing Technique in Magnetic Anomaly Detection Systems

Electronic method for suppressing output instability of GMI sensors caused by the orientation

Methods of Differential Submarine Detection Based on Magnetic Anomaly and Technology of Probes Arrangement

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