Performance degradation effect countermeasures in residence times difference (RTD) fluxgate magnetic sensors

Li, J., Zhang, X., Shi, J., Heidari, H. and Wang, Y. (2019) Performance degradation effect countermeasures in residence times difference (RTD) fluxgate magnetic sensors. IEEE Sensors Journal, (doi:10.1109/JSEN.2019.2936552) (Early Online Publication)

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Abstract

This paper aims to explore the detection defect of residence times difference (RTD) fluxgate working in low-power mode and present the countermeasures for sensor resolution improvement and linearity enhancement. The main defects are amplitude and symmetry changes induced in the output spikes of fluxgate probe due to the magnetic field. These defects lead to thresholds deviation and asymmetry, then cause severe performance degradation especially on detection resolution and linearity according to the RTD theory. To overcome such effects, the optimized RTD method based on voltage extraction and feedback technology is proposed to implement magnetic field compensation and achieve a zero-field running regime of the RTD fluxgate. In this regard, the sensor linearity is improved by a factor of 38, and the resolution degradation effect is suppressed more than 6 times, verified by the laboratory experiments. The optimized detection method proposed in this paper demonstrated a great potential to achieve lower power consumption and will make the RTD fluxgate more promising technology among bio-magnetic applications.

Item Type:Articles
Additional Information:This work was supported in part by the National Key Research and Development Plan (Code No. 2018YFC1503903), and Graduate Innovation Fund of Jilin University.
Status:Early Online Publication
Refereed:Yes
Glasgow Author(s) Enlighten ID:Heidari, Dr Hadi
Authors: Li, J., Zhang, X., Shi, J., Heidari, H., and Wang, Y.
College/School:College of Science and Engineering > School of Engineering > Electronics and Nanoscale Engineering
Journal Name:IEEE Sensors Journal
Publisher:IEEE
ISSN:1530-437X
ISSN (Online):1558-1748
Published Online:21 August 2019
Copyright Holders:Copyright © 2019 IEEE
First Published:First published in IEEE Sensors Journal 2019
Publisher Policy:Reproduced in accordance with the copyright policy of the publisher

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