A Man-Portable Magnetoelectric DC Magnetic Sensor With Extremely High Sensitivity

被引：26
作者：
Shen, Ying [1 ,2 ,3 ,4 ]
Ma, Dingyi [1 ,2 ,3 ]
Gao, Junqi [1 ,2 ,3 ]
机构：
[1] Harbin Engn Univ, Acoust Sci & Technol Lab, Harbin 150001, Heilongjiang, Peoples R China
[2] Harbin Engn Univ, Minist Ind & Informat Technol, Key Lab Marine Informat Acquisit & Secur, Harbin 150001, Heilongjiang, Peoples R China
[3] Harbin Engn Univ, Coll Underwater Acoust Engn, Harbin 150001, Heilongjiang, Peoples R China
[4] MultiDimens Technol Co Ltd, Zhangjiagang 215600, Peoples R China
来源：
IEEE ELECTRON DEVICE LETTERS | 2018年 / 39卷 / 09期
关键词：
Magnetoelectric; magnetic sensor; lock-in circuit; resolution; LAMINATE COMPOSITES;
D O I：
10.1109/LED.2018.2858280
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：
This letter presents an advanced 3-axis portable dc magnetic sensor unit consisting of magneto-electric (ME) composites and a custom lock-in amplifier circuit, which has extremely high sensitivity and detection resolution. The Metglas/Pb(Zr,Ti)O3 ME composites driven by a lock-in amplifier circuit exhibit a high sensitivity of 5 V/Oe. Moreover, the equivalent magnetic noise of the unit is limited to 128 pT/root Hz at 1 Hz. Therefore, a dc magnetic field as small as 1 nT can be sensed directly in the time domain. The entire 3-axis dc magnetic sensor is portable and energy-efficient, making it promising for magnetic navigation applications based on sensing variations in the magnitude and orientation of local geomagnetic fields.
引用
收藏
页码：1417 / 1420
页数：4
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