scholarly journals Demagnetization Effect in a Meander-Core Orthogonal Fluxgate Sensor

Micromachines ◽  
2021 ◽  
Vol 12 (8) ◽  
pp. 937
Author(s):  
Shaotao Zhi ◽  
Xuecheng Sun ◽  
Qiaozhen Zhang ◽  
Jie Chen ◽  
Xiangfen Zhang ◽  
...  
Keyword(s):  
Line Width ◽  
Amorphous Ribbon ◽  
Magnetic Core ◽  
Linear Range ◽  
Magnetic Sensors ◽  
Magnetic Interactions ◽  
Close Match ◽  
Demagnetization Factor ◽  
Fluxgate Sensor ◽  
Finite Element Modeling Simulation

Demagnetization effect plays an important role in the magnetic core design of the orthogonal fluxgate sensor. In this paper, a meander-core orthogonal fluxgate sensor based on amorphous ribbon is described. The demagnetization model of meander-core structures is established, and the average demagnetization factor can be evaluated by finite element modeling. Simulation and experimental analyses were performed to study the effects of demagnetization on the sensitivity and linear range of orthogonal fluxgate sensors in the fundamental mode by varying the number of strips, the line width, and the spacing of the meander-cores. The results were compared and revealed a very close match. The results show that the demagnetization factor increases with an increase in the number of strips and the line width, which leads to an increase in the linear range of the sensors. The sensitivity can be improved by increasing the number of strips appropriately, however, it is reduced when the line width increases. Smaller spacing results in a larger demagnetization factor due to the magnetic interactions between adjacent strips, which reduces the sensitivity of the sensor. The results obtained here from simulations and experiments are useful for designing magnetic sensors with similar structures.

scholarly journals Design of a Low-Cost Small-Size Fluxgate Sensor

Sensors ◽  
2021 ◽  
Vol 21 (19) ◽  
pp. 6598
Author(s):  
Xiaoyu Shen ◽  
Yuntian Teng ◽  
Xingxing Hu
Keyword(s):  
Low Cost ◽  
Amorphous Ribbon ◽  
Magnetic Core ◽  
Fluxgate Magnetometer ◽  
Fluxgate Sensor ◽  
Operational Tests ◽  
Race Track ◽  
New Race ◽  
Data Acquisition Module ◽  
Geomagnetic Observations

Traditional fluxgate sensors used in geomagnetic field observations are large, costly, power-consuming and often limited in their use. Although the size of the micro-fluxgate sensors has been significantly reduced, their performance, including indicators such as accuracy and signal-to-noise, does not meet observational requirements. To address these problems, a new race-track type probe is designed based on a magnetic core made of a Co-based amorphous ribbon. The size of this single-component probe is only Φ10 mm × 30 mm. The signal processing circuit is also optimized. The whole size of the sensor integrated with probes and data acquisition module is Φ70 mm × 100 mm. Compared with traditional fluxgate and micro-fluxgate sensors, the designed sensor is compact and provides excellent performance equal to traditional fluxgate sensors with good linearity and RMS noise of less than 0.1 nT. From operational tests, the results are in good agreement with those from a standard fluxgate magnetometer. Being more suitable for modern dense deployment of geomagnetic observations, this small-size fluxgate sensor offers promising research applications at lower costs.

scholarly journals Wide Linearity Range and Highly Sensitive MEMS-Based Micro-Fluxgate Sensor with Double-Layer Magnetic Core Made of Fe–Co–B Amorphous Alloy

Micromachines ◽  
2017 ◽  
Vol 8 (12) ◽  
pp. 352 ◽  
Author(s):  
Lei Guo ◽  
Cai Wang ◽  
Saotao Zhi ◽  
Zhu Feng ◽  
Chong Lei ◽  
...  
Keyword(s):  
Amorphous Alloy ◽  
Double Layer ◽  
Magnetic Core ◽  
Linearity Range ◽  
Fluxgate Sensor ◽  
Highly Sensitive

Low power integrated fluxgate sensor with a spiral magnetic core

2011 ◽  
Vol 17 (12) ◽  
pp. 1697-1702
Author(s):  
Chong Lei ◽  
Lei Chen ◽  
Jian Lei ◽  
Xiaohu Yang ◽  
Yong Zhou
Keyword(s):  
Low Power ◽  
Magnetic Core ◽  
Fluxgate Sensor

A low power micro fluxgate sensor with improved magnetic core

2012 ◽  
Vol 19 (4) ◽  
pp. 591-598 ◽  
Author(s):  
Chong Lei ◽  
Jian Lei ◽  
Zhen Yang ◽  
Tao Wang ◽  
Yong Zhou
Keyword(s):  
Low Power ◽  
Magnetic Core ◽  
Fluxgate Sensor

A Micro Fluxgate Magnetic Sensor Using New Printed Circuit Board Technology

2006 ◽  
Vol 326-328 ◽  
pp. 1487-1490 ◽  
Author(s):  
Won Youl Choi ◽  
Jun Sik Hwang ◽  
Sang On Choi
Keyword(s):  
Low Power ◽  
Printed Circuit Board ◽  
Sine Wave ◽  
Magnetic Core ◽  
Magnetic Sensor ◽  
Circuit Board ◽  
Sensing Element ◽  
Printed Circuit ◽  
Fluxgate Sensor ◽  
Ring Shape

We have developed a micro fluxgate magnetic sensor using new printed circuit board (PCB) technology. The fluxgate sensor consisted of five PCB stack layers including one layer of magnetic core and four layers of excitation and pick-up coils. The center layer as a magnetic core was made of micro patterned amorphous magnetic ribbon with an extremely high DC permeability of ~100,000, and the core had a rectangular ring shape. Four outer layers as an excitation and pickup coils had a planar solenoid structure. The amorphous magnetic core was easily saturated due to the high permeability, low coercive field, and closed magnetic path for the excitation field. The chip size of the fabricated sensing element was 7.3 × 5.7 mm2. Excellent linear response over the range of –100 μT to +100 μT was obtained with sensitivity of 780 V/T at excitation sine wave of 3 Vp-p and 360 kHz. A very low power consumption of ~8 mW was measured. This low power, small size, and high sensitive fluxgate sensor to measure a low magnetic field is very useful for various applications.

scholarly journals Fabrication and Characterization of a Flexible Fluxgate Sensor with Pad-Printed Solenoid Coils

Sensors ◽  
2020 ◽  
Vol 20 (8) ◽  
pp. 2275 ◽  
Author(s):  
Spyridon Schoinas ◽  
Adyl-Michaël El Guamra ◽  
Fabien Moreillon ◽  
Philippe Passeraub
Keyword(s):  
Excitation Frequency ◽  
Magnetic Core ◽  
Full Scale ◽  
Measuring Range ◽  
Fluxgate Sensor ◽  
Printing Technique ◽  
Linearity Error ◽  
Fabrication And Characterization ◽  
Measured Sensitivity

This paper presents the fabrication and characterization of a flexible, flat, miniaturized fluxgate sensor with a thin amorphous rectangular magnetic core fabricated by the pad/printing technique. Both the design and the various printing steps of the sensor are presented. The fluxgate sensor comprises of solenoid coils, and to the best of our knowledge, is the first to be printed with a conventional micro-printing technique. The magnetic core is a non-printed component, placed between the printed layers. The sensor’s linear measuring range is ±40 µT with 2% full-scale linearity error, at 100 kHz excitation frequency. The highest measured sensitivity reaches 14,620 V/T at 200 kHz, while the noise of the sensor was found to be 10 nT/ Hz at 1 Hz.

scholarly journals A new amorphous ribbon fluxgate sensor based on torsional-creep-induced anisotropy

1990 ◽  
Vol 26 (1) ◽  
pp. 276-280 ◽  
Author(s):  
O.V. Nielsen ◽  
J. Gutierrez ◽  
B. Hernando ◽  
H.T. Savage
Keyword(s):  
Amorphous Ribbon ◽  
Induced Anisotropy ◽  
Fluxgate Sensor
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