Research on the Orthogonal Fundamental Mode Fluxgate Sensor Circuit

被引：3
|
作者：
Yuan, Zhenzhong [1 ]
Zhang, Yuxin [1 ]
Wang, Dong [1 ]
Jiang, Yingdan [1 ]
Guo, Ronghai [2 ]
机构：
[1] China Elect Technol Grp Corp, Res Inst 58, Wuxi, Jiangsu, Peoples R China
[2] Mil Representat Off Army Nanchang, Nanchang, Jiangxi, Peoples R China
来源：
IEEE ACCESS | 2020年 / 8卷
关键词：
Low noise fluxgate; orthogonal fundamental mode; Barkhausen noise; NOISE; HYBRID; DESIGN;
D O I：
10.1109/ACCESS.2020.3016783
中图分类号：
TP [自动化技术、计算机技术];
学科分类号：
0812 ;
摘要：
Currently, magnetic fluxgate circuits used for magnetic fleld measurements mostly adopt parallel excitation second harmonic generation. The magnetic fluxgate developed by this method cannot possess both low noise and high bandwidth at the same time. The orthogonal fundamental mode fluxgate is used in this paper: the excitation magnetic fleld is orthogonal to the magnetic fleld to be measured, and the external magnetic fleld is detected by measuring the voltage signal in the pick-up coil. The excitation magnetic fleld changes with the parallel excitation second harmonic method while the direction of the excitation magnetic fleld does not change in the orthogonal fundamental mode scheme, which can effectively reduce the influence of Barkhausen noise. The magnetic fluxgate circuit is designed based on the orthogonal fundamental mode scheme and its performance indexes are tested. The range of the magnetic fluxgate is +/- 100000 nT, the sensitivity is 100 mu V/nT, the output noise is 8.9 pT/rt(Hz)@1 Hz, and the bandwidth is DC-15 kHz. The orthogonal fundamental mode fluxgate improves the bandwidth performance while enabling low-noise magnetic fleld measurements in practical applications.
引用
收藏
页码：150665 / 150671
页数：7
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