Location Method of Equivalent Attenuation Magnetic Moment of Magnetic Target in Geomagnetic Field

doi:10.3969/j.issn.1000-1093.2018.02.010

Abstract

Abstract: A location method based on equivalent attenuation magnetic moment is proposed to obtain the position parameter of magnetic target in geomagnetic field. A spatial model of regular hexahedron is established to measure the magnetic field for magnetic source positioning. The equivalent attenuation moments of the geometric central point and the side central point of regular hexahedron are calculated. The positioning formula based on equivalent attenuation magnetic moment for magnetic dipole target is deduced. The influences of some factors, such as geomagnetic field, magnetic gradient measurement noise, regular hexahedral baseline, measurement accuracy and so on, on the location inversion parameter of magnetic target are analyzed. The calculated results show that the proposed method can effectively overcome the interference of the geomagnetic field and achieve a reliable positioning result of magnetic target. The proposed method can significantly reduce the size of the original computation model by 64.7% with higher positioning accuracy. Key

Key words: magnetictargetlocation, magneticgradienttensorinvariant, equivalentattenuationmagneticmoment, geomagneticfield

CLC Number:

JIA Wen-dou, LIN Chun-sheng, SUN Yu-hui, ZHAI Guo-jun. Location Method of Equivalent Attenuation Magnetic Moment of Magnetic Target in Geomagnetic Field[J]. Acta Armamentarii, 2018, 39(2): 283-289.

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第39卷第2期
2018 年2月兵工学报ACTA
ARMAMENTARIIVol.39No.2Feb. 2018