A portable single axis magnetic gradiometer

被引：16
|
作者：
Merayo, JMG
Petersen, JR
Nielsen, OV
Primdahl, F
Brauer, P
机构：
[1] Tech Univ Denmark, Oersted DTU, DK-2800 Lyngby, Denmark
[2] Danish Space Res Inst, DK-2100 Copenhagen, Denmark
来源：
SENSORS AND ACTUATORS A-PHYSICAL | 2001年 / 93卷 / 03期
关键词：
magnetic gradient; fluxgate sensor; calibration;
D O I：
10.1016/S0924-4247(01)00656-2
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
The single axis magnetic gradiometer based on two compact detector compensation (CDC) fluxgate ringcore sensors separated 20 cm is described. Despite its high stability and precision better than 1 nT, the calibration procedures are not straightforward. Firstly, the mono-axial measurement does not provide vector information about the magnetic field. Secondly, one of the sensors measures the ambient magnetic field and is used to compensate for the main field at both sensors. Several methods have been developed for characterization of the 2 gradiometer, and the calibration of the gradient measurements is achieved by using a magnetic dipole of strength 2 mAm(2). In a coil facility, the gradient can be determined with an accuracy of 0.3 nT/m(RMS). (C) 2001 Elsevier Science B.V. All rights reserved.
引用
收藏
页码：185 / 196
页数：12
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