Fiber-Bragg-Grating Coupled Magnetostrictive Sensors for Magnetic Tracking of Biomedical Implants

Shojaei Baghini, M. , Broekens, K., Oderwald, M., Breedveld, P., Heidari, H. and van der Heiden, M. (2023) Fiber-Bragg-Grating Coupled Magnetostrictive Sensors for Magnetic Tracking of Biomedical Implants. In: 21st IEEE Interregional NEWCAS Conference (IEEE NEWCAS 2023), Edinburgh, UK, 26-28 June 2023, ISBN 9798350300246 (doi: 10.1109/NEWCAS57931.2023.10198071)

Abstract

Magnetostrictive strain sensors with high spinorbit coupling have been integrated with Fiber-Bragg-Grating sensors wherein the gap within the gratings varies with strain within the encapsulating magnetostrictive material. Terfenol-D has been chosen as the mm sized magnetostrictive material which exhibits the largest known bulk magnetostriction. The setup utilised consists of an optical to electrical transducer leading to lower noise in the system while carrying out sensing in the magneto-optic domain. Non-linear isotropic analytical modeling and linear anisotropic finite element modeling is carried out to gain further insight into the variation of material parameters with external magnetic field intensity. The operated magnetic fields lie within 100 μT with a sensor sensitivity of 0.6 kHz/ppm, thus reducing risks due to any prolonged or repeated exposure. This technology can be integrated with state-of-the-art sensors with high sensitivity to create smaller and safer tracking systems, particularly in-vivo.

• Item Type: Conference Proceedings
• Additional Information: This paper is partly supported by UKRI Horizon Europe Guarantee HORIZON-EICPATHFINDERCHALLENGES CROSSBRAIN (GA n.101070908).
• Status: Published
• Refereed: Yes
• Glasgow Author(s) Enlighten ID: Shojaei Baghini, Ms Mahdieh and Heidari, Professor Hadi
• Authors: Shojaei Baghini, M., Broekens, K., Oderwald, M., Breedveld, P., Heidari, H., and van der Heiden, M.
• College/School: College of Science and Engineering > School of Engineering > Electronics and Nanoscale Engineering
• ISSN: 2474-9672
• ISBN: 9798350300246
• Copyright Holders: Copyright © 2023 IEEE
• First Published: First published in 2023 21st IEEE Interregional NEWCAS Conference (NEWCAS)
• Publisher Policy: Reproduced in accordance with the publisher copyright policy

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