Design and Implementation of Close-Loop Detection for Coupled Core Fluxgate Magnetic Sensors

Li, J., Wang, Y., Shi, J. and Heidari, H. (2020) Design and Implementation of Close-Loop Detection for Coupled Core Fluxgate Magnetic Sensors. In: 2020 27th IEEE International Conference on Electronics, Circuits and Systems (ICECS), Glasgow, Scotland, 23-25 Nov 2020, ISBN 9781728160443 (doi:10.1109/ICECS49266.2020.9294782)

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Abstract

This paper presents a closed-loop detection strategy with significant potential to solve the detection defects existed in the residence-times difference (RTD) method of the coupled core fluxgate magnetic sensors. The external magnetic field (e.g. Earth's magnetic field), as the main source of these detection defects, has been analyzed by the theoretical investigation. To overcome such deficiencies, the close-loop detection method based on the analog-type RTD readout method and magnetic flux-balance detection is utilized to implement external magnetic field real-time compensation and achieve a near-zero-field working state of the magnetic material. The fluxgate with the optimized detection strategy and vertical arrangement structure has been designed, fabricated and examined, and the preliminary results showed steady operation and a detection resolution of ±0.10 nT. The optimized detection method based on the balance detection concept proposed in this manuscript demonstrated a great potential to obtain the optimal detection performances which are embedded in the coupling-induced oscillation of nonlinear dynamics.

Item Type:Conference Proceedings
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Heidari, Dr Hadi and Li, Mr Jingjie
Authors: Li, J., Wang, Y., Shi, J., and Heidari, H.
College/School:College of Science and Engineering > School of Engineering > Electronics and Nanoscale Engineering
ISBN:9781728160443
Copyright Holders:Copyright © 2020 IEEE
First Published:First published in 2020 27th IEEE International Conference on Electronics, Circuits and Systems (ICECS)
Publisher Policy:Reproduced in accordance with the publisher copyright policy
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