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 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.

Physical Characteristic Analysis of Solenoid-Based Coil Structure

2011 ◽  
Vol 403-408 ◽  
pp. 3739-3743
Author(s):  
Nadzril Sulaiman ◽  
Jumril Yunas ◽  
Gandi Sugandi ◽  
Majlis Burhanuddin Yeop
Keyword(s):  
Magnetic Field ◽  
Physical Characteristic ◽  
Magnetic Core ◽  
Physical Characteristics ◽  
Fluxgate Magnetometer ◽  
Characteristic Analysis ◽  
Coil Structure ◽  
And Performance ◽  
Main Components ◽  
Low Magnetic Field

Measurement of low magnetic field has played an important role in many electronics applications such as military, non-destructive test, medical diagnosis and treatment. The presence of magnetic field, particularly the strength and direction, can be measured using magnetometer. Fluxgate magnetometer is one of the prominent type among many types of magnetometer due to its simple operating principle, robustness and durability. The main components of fluxgate magnetometer consisting of Driving Coils, Sensing Coils and Magnetic Core. In recent years, fluxgates are increasingly made into micro-scale through MEMS silicon processing technology. Physical characteristics of fluxgate coils such as width of the coil; distance between successive coil; and gap between top and bottom coils have an effect towards device miniaturization and performance. Therefore, physical characteristic analysis of coils is significant. This paper highlights analysis on physical characteristics of solenoid-based coil structure for a micro-scaled fluxgate magnetometer by means of finite element method (FEM) simulations. The results of this analysis can be used to design proper coils that could improve the performance of the device.

scholarly journals Facile Synthesis and Special Phase Transformation of Hydrophilic Iron Oxides Nanoparticles

2017 ◽  
Vol 2017 ◽  
pp. 1-5 ◽  
Author(s):  
Liqiao Chen ◽  
Yunqian Long ◽  
Zhe Leng ◽  
Jinfei Hu ◽  
Xuan Yu ◽  
...  
Keyword(s):  
Phase Transformation ◽  
Iron Oxide ◽  
Low Cost ◽  
Superparamagnetic Iron Oxide ◽  
Magnetic Core ◽  
Cubic Phase ◽  
Oxide Nanoparticles ◽  
Solvothermal Process ◽  
Facile Synthesis ◽  
Hydrophilic Surfaces

Superparamagnetic iron oxide nanoparticles (SPIONs), γ-Fe2O3, with hydrophilic surfaces are fabricated in ethylene glycol solutions, without surfactant or additive, by solvothermal process from α-Fe2O3 nanoparticle as precursors. With the addition of a trace of hydrazine hydrate, the cubic phase Fe3O4 nanoparticles are obtained instead of γ-Fe2O3. The saturation magnetization value of γ-Fe2O3 nanoparticles is up to 74.3 emu/g. This study provides a low cost, safe, and universal route to serve as excellent biocompatibility magnetic core for future applications in biomedical, agriculture, and horticulture applications.

Design of Gamma Energy Spectrometer Based on the Technology of LabVIEW and Bluetooth

2010 ◽  
Vol 113-116 ◽  
pp. 720-724
Author(s):  
Fang Yuan ◽  
Yue Zhong Li ◽  
Li Yi Xie
Keyword(s):  
Data Storage ◽  
Liquid Crystal Display ◽  
Low Cost ◽  
Acquisition System ◽  
Gamma Energy ◽  
Display Module ◽  
Communication Module ◽  
Energy Spectrometer ◽  
Analysis System ◽  
Data Acquisition Module

This paper introduced the design of gamma energy spectrometer by technology of LabVIEW and Bluetooth. The hardware of system included portable gamma energy spectrometer, Bluetooth module and PC. The software of system included the composed of acquisition system by the MCU and analysis system by PC.The design of acquisition system included the design of main program, liquid crystal display module, keyboard module, Bluetooth communication module and data acquisition module. The design of analysis system included the design of serial communication module, data storage module and data processing module. Practice shows that the energy spectrometer has a user-friendly, flexible, low cost, easy to expand and good performance.

Low cost data acquisition module for evaluating the quantitative performance of daylight systems

Solar Energy ◽  
2007 ◽  
Vol 81 (9) ◽  
pp. 1187-1190 ◽  
Author(s):  
F. Ciampini ◽  
P.S. Scarazzato ◽  
A.A.R. Neves ◽  
D.C.L. Pereira ◽  
M.H. Yamanaka
Keyword(s):  
Data Acquisition ◽  
Low Cost ◽  
Cost Data ◽  
Quantitative Performance ◽  
Data Acquisition Module

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

UNILEC 1409 Al

Alloy Digest ◽  
1983 ◽  
Vol 32 (1) ◽  
Keyword(s):  
Electrical Resistance ◽  
Low Cost ◽  
Heat Treating ◽  
Magnetic Core ◽  
Core Material ◽  
Resistance Alloy ◽  
Resistance To Oxidation ◽  
Intermittent Heating ◽  
Heating Up ◽  
Oxidation And Corrosion

Abstract Unilec 1409 Al is a ductile alloy steel that is moderately magnetic, has high electrical resistance and relatively low cost. It is capable of resisting oxidation for continuous duty at temperatures up to 1800 F and is satisfactory for intermittent heating up to 1600 F. It is primarily used as an electrical-resistance alloy, but it also can be used as a magnetic core material in applications where resistance to oxidation and corrosion are required. This datasheet provides information on composition, physical properties, elasticity, and tensile properties. It also includes information on high temperature performance and corrosion resistance as well as forming, heat treating, machining, and joining. Filing Code: SS-419. Producer or source: Cyclops.

Flexible On-Chip Inductors and Transformer

2010 ◽  
Vol 2010 (DPC) ◽  
pp. 001948-001966 ◽  
Author(s):  
James J. Wang
Keyword(s):  
Noise Suppression ◽  
Low Cost ◽  
Gold Wire ◽  
Magnetic Core ◽  
Wire Bonding ◽  
Core Material ◽  
Ferrite Core ◽  
Ic Design ◽  
Lc Oscillator ◽  
On Chip

Inductors directly on-chip was designed, processed and tested. Combining thick, electroplated gold used to produce LCD driver ICs plus gold wire bonding, toroidal inductors are formed directly on top of ICs. Both processes are production ready. One layouts inductor line segments on top of ICs and then complete loops using gold wire bonds at packaging. Two, 4, 8 or 16 toroids will fit inside thin QFN package. Cost to integrate 2 or more inductors is less than buying 0402 chip inductors and then soldering SMT components around ICs. Integrating inductors shrinks PCB board and allows IC design of filters, LC oscillator, EM noise suppression or ESD protection circuits. On-chip 4nH to 2000nH inductors is practical today. Choosing the magnetic core material and selecting the number of loops/turns, designers can integrate different inductors on top of an existing IC. Custom, ultra-tiny magnetic cores are produced from same magnetic materials that are inside discrete inductors or transformers. 50nH to 500nH inductors with Q comparable to chip inductors are possible for MHz frequency ranges by selecting ferrite core. Using high permeability permalloy, one produces 200nH to 2000nH inductors or transformers directly on-chip. Flexibility is another advantage of on-chip Gold InductorsTM. By adjusting loop heights during wire bonding, one can adjust inductance value +- 100%. By laying out both primary and secondary coils around magnetic core, designers can choose to integrate transformer or inductors. Low cost, production processes, control with IC design, plus flexibility, one can begin to design and produce on-chip filters and transformers; achieving smaller electronics.

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