A Fluxgate Current Sensor With a U-Shaped Magnetic Gathering Shell

Yang, Xiaoguang; Wei, Guo; Li, Congcong; Zhu, Bo; Pang, Lingling; Wang, Youhua

doi:10.1109/tmag.2015.2452267

Cited by 10 publications

(5 citation statements)

References 14 publications

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“…To mitigate these effects, strategies such as sensor array schemes have been explored and experimentally validated [ 25 , 26 , 28 , 29 ]. Additional research has been directed towards innovating fluxgate magnetic cores by integrating structures for field shielding or flux guidance, exemplified by designs like U-shaped, split, and double cores [ 24 , 27 , 30 , 31 ]. While many previous studies have effectively mitigated magnetic field interference, the challenge of eliminating such interference from a mechanistic perspective and achieving a high-performance, low-cost sensor design remains a significant issue in applications.…”

Section: Introductionmentioning

confidence: 99%

Design of Fluxgate Current Sensor Based on Magnetization Residence Times and Neural Networks

Li,

Ren,

Luo

et al. 2024

Sensors

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This study introduces a novel fluxgate current sensor with a compact, ring-shaped configuration that exhibits improved performance through the integration of magnetization residence times and neural networks. The sensor distinguishes itself with a unique magnetization profile, denoted as M waves, which emerge from the interaction between the target signal and ambient magnetic interference, effectively enhancing interference suppression. These M waves highlight the non-linear coupling between the magnetic field and magnetization residence times. Detection of these residence times is accomplished using full-wave rectification circuits and a Schmitt trigger, with a digital output provided by timing sequence detection. A dual-layer feedforward neural network deciphers the target signal, exploiting this non-linear relationship. The sensor achieves a linearity error of 0.054% within a measurement range of 15 A. When juxtaposed with conventional sensors utilizing the residence-time difference strategy, our sensor reduces linearity error by more than 40-fold and extends the effective measurement range by 150%. Furthermore, it demonstrates a significant decrease in ambient magnetic interference.

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Section: Introductionmentioning

confidence: 99%

Design of Fluxgate Current Sensor Based on Magnetization Residence Times and Neural Networks

Li,

Ren,

Luo

et al. 2024

Sensors

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“…However, this method is large in size and its cost is high, which makes it difficult to be applied practically. Reference [17] added a U-shaped shield outside the fluxgate sensor to shield the external magnetic field interference, but it failed to analyze the material and structure of the shield. This paper shows that a magnetic shielding method is feasible, but it does not describe more details.…”

Section: Introductionmentioning

confidence: 99%

Design of a Fluxgate Weak Current Sensor with Anti-Low Frequency Interference Ability

Tan

Qian

et al. 2022

Energies

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According to the requirements of weak current measurement in power grid, a weak current sensor with anti-low frequency interference ability is developed. The sensor adopts the principle of fluxgate detection and adds a magnetic ring on the original basis. The structure of the magnetic ring is simulated using comsol to further improve detection sensitivity. In order to solve the problem that the electromagnetic current sensor is vulnerable to the interference of geomagnetic field and power frequency magnetic field in weak current measurement, a magnetic shielding method with low cost is selected, and the shielding shell structure is designed using a finite element analysis method. The experimental results show that the minimum measurable current is 1 mA, the measurement range is 1 mA–1 A, and the bandwidth is DC-16 kHz. The designed magnetic shielding shell can effectively reduce 97.3% of the DC magnetic field interference and 95.7% of the power frequency magnetic field interference. The sensor can realize accurate measurement of weak current in power grid.

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“…Compared with other magnetic sensors, fluxgate magnetic sensors have advantages such as high sensitivity, high accuracy, high resolution, simple and compact structures, and low noise [ 6 , 7 , 8 , 9 , 10 , 11 , 12 , 13 , 14 ]. What’s more, they can be used in different kinds of environment and even hostile environments, and they have important applications in weak magnetic field measurements.…”

Section: Introductionmentioning

confidence: 99%

Recent Progress of Fluxgate Magnetic Sensors: Basic Research and Application

Wei

Liao

Zhang

et al. 2021

Sensors

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Fluxgate magnetic sensors are especially important in detecting weak magnetic fields. The mechanism of a fluxgate magnetic sensor is based on Faraday’s law of electromagnetic induction. The structure of a fluxgate magnetic sensor mainly consists of excitation windings, core and sensing windings, similar to the structure of a transformer. To date, they have been applied to many fields such as geophysics and astro-observations, wearable electronic devices and non-destructive testing. In this review, we report the recent progress in both the basic research and applications of fluxgate magnetic sensors, especially in the past two years. Regarding the basic research, we focus on the progress in lowering the noise, better calibration methods and increasing the sensitivity. Concerning applications, we introduce recent work about fluxgate magnetometers on spacecraft, unmanned aerial vehicles, wearable electronic devices and defect detection in coiled tubing. Based on the above work, we hope that we can have a clearer prospect about the future research direction of fluxgate magnetic sensor.

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A Fluxgate Current Sensor With a U-Shaped Magnetic Gathering Shell

Cited by 10 publications

References 14 publications

Design of Fluxgate Current Sensor Based on Magnetization Residence Times and Neural Networks

Design of Fluxgate Current Sensor Based on Magnetization Residence Times and Neural Networks

Design of a Fluxgate Weak Current Sensor with Anti-Low Frequency Interference Ability

Recent Progress of Fluxgate Magnetic Sensors: Basic Research and Application

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