scholarly journals The Design of the Biomagnetic Field Sensor without Magnetic Shielding

2019 ◽  
Vol 16 (04) ◽  
pp. 1950019
Author(s):  
Ming Xu ◽  
Changlin Han ◽  
Hui Min Lu ◽  
Junhao Xiao ◽  
Jingsheng Tang ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Wearable Sensors ◽  
High Sensitivity ◽  
Magnetic Shielding ◽  
Small Range ◽  
Natural Conditions ◽  
Gmi Effect ◽  
Weak Intensity ◽  
Field Sensor ◽  
Giant Magneto Impedance

Due to the extremely weak intensity of the biomagnetic field and the serious interference from the environmental magnetic field, the detection of the biomagnetic field becomes such challenging work. After analyzing the deficiencies in the current biomagnetic field sensors, this paper proposes and realizes a high-sensitivity magnetic field sensor, based on the giant magneto-impedance (GMI) effect. Taking advantage of the miniaturized magnetic probe, the multistage multiple amplification and the multiband interference suppression, our sensor mainly makes three achievements: the pT level magnetic resolution, the ability to detect the muscle magnetic field without the magnetic shielding and the resistibility to a small-range wobbling in the state of working, which makes it possible to detect the biomagnetic field by wearable sensors under natural conditions.

Effect of Magnetic Field on the Magnetic Structure of Nanocrystalline Electroplated NiFe Layers

2005 ◽  
Vol 23 ◽  
pp. 167-170
Author(s):  
Xiao Ping Li ◽  
Z.J. Zhao ◽  
T.B. Oh ◽  
H.L. Seet
Keyword(s):  
Magnetic Field ◽  
Magnetic Structure ◽  
High Frequency ◽  
Longitudinal Magnetic Field ◽  
High Sensitivity ◽  
Frequency Range ◽  
Gmi Effect ◽  
Double Peaks ◽  
Field Sensor ◽  
The Magnetic Field

In order to develop high sensitivity micro sensors for bio-magnetic field using NiFe electroplated composite sensing elements, it is important to study how different plating processes can affect the magnetic properties in terms of the chemical composition and magnetic structure of the plated layer. In this study, to study the effect of the magnetic field on the magnetic structure of the electroplated NiFe layers, magnetic controlled plating in which a longitudinal magnetic field ranging from 0 to 400 Oe is applied during nanocrystalline electroplating of permalloy Ni80Fe20 layer of 2 µm thick onto a 20 µm diameter Cu wire. The magnetic structure of the plated layers is studied by investigating the Giant magneto-impedance (GMI) effect of the plated layer. GMI has been measured from a frequency range of 100 kHz to 50 MHz. It is observed that under conventional electroplating without an external magnetic controlling field, the anisotropy of the plated layer is generally circumferential as indicted by the double peaks of the MI curves in testing at high frequency. When a longitudinal magnetic field is applied during electroplating, the plated layer shows single peak MI curves, suggesting that the anisotropy is changed from circumferential to longitudinal. The results also show that the sensitivity and resolution of a magnetic field sensor is improved greatly by changing the anisotropy of the plated layer from circumferential to longitudinal.

High-sensitivity fiber optic magnetic field sensor based on lossy mode resonance and hollow core-offset structure

2021 ◽  
pp. 1-12
Author(s):  
Xue-Peng Jin ◽  
Hong-Zhi Sun ◽  
Shuo-Wei Jin ◽  
Wan-Ming Zhao ◽  
Jing-Ren Tang ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Fiber Optic ◽  
High Sensitivity ◽  
Magnetic Field Sensor ◽  
Hollow Core ◽  
Field Sensor

High sensitivity side-hole fiber magnetic field sensor based on surface plasmon resonance

2016 ◽  
Vol 14 (11) ◽  
pp. 110603-110606 ◽  
Author(s):  
Sijun Weng Sijun Weng ◽  
Li Pei Li Pei ◽  
Jianshuai Wang Jianshuai Wang ◽  
Tigang Ning Tigang Ning ◽  
and Jing Li and Jing Li
Keyword(s):  
Magnetic Field ◽  
Surface Plasmon Resonance ◽  
Surface Plasmon ◽  
Plasmon Resonance ◽  
High Sensitivity ◽  
Magnetic Field Sensor ◽  
Side Hole ◽  
Field Sensor

scholarly journals A Novel Experimental Approach to the Applicability of High-Sensitivity Giant Magneto-Impedance Sensors in Magnetic Field Communication

IEEE Access ◽  
2020 ◽  
Vol 8 ◽  
pp. 193091-193101
Author(s):  
Jang-Yeol Kim ◽  
In-Kui Cho ◽  
Hyun Joon Lee ◽  
Jaewoo Lee ◽  
Jung-Ick Moon ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Experimental Approach ◽  
High Sensitivity ◽  
Giant Magneto Impedance

scholarly journals Magnetic Communication Using High-Sensitivity Magnetic Field Detectors

Sensors ◽  
2019 ◽  
Vol 19 (15) ◽  
pp. 3415 ◽  
Author(s):  
Maurice Hott ◽  
Peter A. Hoeher ◽  
Sebastian F. Reinecke
Keyword(s):  
Magnetic Field ◽  
Mobile Applications ◽  
Data Communication ◽  
High Sensitivity ◽  
Magnetic Data ◽  
Receiver Coil ◽  
Magnetic Field Sensors ◽  
Resistive Sensor ◽  
Field Sensor ◽  
Multiple Detectors

In this article, an innovative approach for magnetic data communication is presented. For this purpose, the receiver coil of a conventional magneto-inductive communication system is replaced by a high-sensitivity wideband magnetic field sensor. The results show decisive advantages offered by sensitive magnetic field sensors, including a higher communication range for small receiver units. This approach supports numerous mobile applications where receiver size is limited, possibly in conjunction with multiple detectors. Numerical results are supported by a prototype implementation employing an anisotropic magneto-resistive sensor.

High-Sensitivity Wideband Magnetic Field Sensor Using Nonlinear Resonance Magnetoelectric Effect

2014 ◽  
Vol 14 (7) ◽  
pp. 2252-2256 ◽  
Author(s):  
Yuri K. Fetisov ◽  
Dmitri A. Burdin ◽  
Dmitri V. Chashin ◽  
Nikolai A. Ekonomov
Keyword(s):  
Magnetic Field ◽  
Magnetoelectric Effect ◽  
Nonlinear Resonance ◽  
High Sensitivity ◽  
Magnetic Field Sensor ◽  
Field Sensor

High sensitivity magnetic field sensor

2000 ◽  
Vol 85 (1-3) ◽  
pp. 202-208 ◽  
Author(s):  
G Vértesy ◽  
A Gasparics ◽  
J Szöllősy
Keyword(s):  
Magnetic Field ◽  
High Sensitivity ◽  
Magnetic Field Sensor ◽  
Field Sensor

scholarly journals Temperature and Magnetism Sensitivity of D-type Fiber Grating Filled with Magnetic Fluid in THz Band

2021 ◽  
Author(s):  
Shuo Liu ◽  
Xinyu Han ◽  
Jiaxin Zhang ◽  
Yuanwei Li ◽  
Xiaolong Dong ◽  
...  
Keyword(s):  
Magnetic Field ◽  
High Sensitivity ◽  
Magnetic Field Sensor ◽  
Fiber Grating ◽  
Sensitivity Measurement ◽  
Absolute Deviation ◽  
Terahertz Band ◽  
Field Sensitivity ◽  
Field Sensor ◽  
Type Fiber

Abstract A terahertz band temperature and magnetic field sensor based on a magneto-fluid-filled D-type microstructure grating is designed. The high sensitivity measurement of temperature and magnetic field is realized by optimizing the structure. The highest temperature sensitivity is 233.88 pm/°C, and the highest magnetic field sensitivity is up to 214.802 pm/mT. When the overall structure size of the sensor was changed by ±0.1 %, the maximal absolute deviation of temperature or magnetic field sensor are 0.018 pm/℃ and 0.03 pm/Oe. At the same time, the dual-parameter demodulation matrix is used to effectively overcome the crosstalk problem.

Micro-structured optical fiber magnetic field sensor based on magnetic fluid filling

2019 ◽  
Vol 33 (31) ◽  
pp. 1950380
Author(s):  
Jie Wang ◽  
Zhen Zhang ◽  
Shuguang Li ◽  
Shun Wang
Keyword(s):  
Magnetic Field ◽  
Magnetic Fluid ◽  
High Sensitivity ◽  
Magnetic Field Sensor ◽  
The Finite Element Method ◽  
Average Sensitivity ◽  
Magnetic Field Sensors ◽  
Hole Radius ◽  
Field Sensor ◽  
Air Hole

A novel micro-structured fiber magnetic field sensor based on magnetic fluid (MF) filling is proposed. The air hole radius in the cladding of fiber is reduced from inner layer to outer layer, and the numerical analysis is performed by the finite element method (FEM). For the [Formula: see text]-pol mode, the proposed sensor has an average sensitivity of 960.61 pm/Oe, and for the [Formula: see text]-pol mode, the average sensitivity can reach 884.85 pm/Oe. The sensor has the advantages of small size and high sensitivity and is competitive in magnetic field sensors.

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