Integrated Pico-Tesla Resolution Magnetoresistive Sensors for Miniaturised Magnetomyography

Siming Zuo, Kianoush Nazarpour, Tim Böhnert, Elvira Paz, Paulo Freitas, Ricardo Ferreira, Hadi Heidari

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Magnetomyography (MMG) is the measurement of magnetic signals generated in the skeletal muscle of humans by electrical activities. However, current technologies developed to detect such tiny magnetic field are bulky, costly and require working at the temperature-controlled environment. Developing a miniaturized, low cost and room temperature magnetic sensors provide an avenue to enhance this research field. Herein, we present an integrated tunnelling magnetoresistive (TMR) array for room temperature MMG applications. TMR sensors were developed with low-noise analogue front-end circuitry to detect the MMG signals without and with averaging at a high signal-to-noise ratio. The MMG was achieved by averaging signals using the Electromyography (EMG) signal as a trigger. Amplitudes of 200 pT and 30 pT, corresponding to periods when the hand is tense and relaxed, were observed, which is consistent with muscle simulations based on finite-element method (FEM) considering the effect of distance from the observation point to the magnetic field source.
Original languageEnglish
Title of host publication2020 42nd Annual International Conference of the IEEE Engineering in Medicine Biology Society (EMBC)
PublisherInstitute of Electrical and Electronics Engineers (IEEE)
Pages3415-3419
Number of pages5
ISBN (Electronic)978-1-7281-1990-8
ISBN (Print)978-1-7281-1991-5
DOIs
Publication statusPublished - 27 Aug 2020
Event42nd Annual International Conference of the IEEE Engineering in Medicine and Biology Society - Montréal, Québec, Canada
Duration: 20 Jul 202024 Jul 2020
Conference number: 42
https://embc.embs.org/2020/

Publication series

Name
PublisherIEEE
ISSN (Print)1557-170X
ISSN (Electronic)1558-4615

Conference

Conference42nd Annual International Conference of the IEEE Engineering in Medicine and Biology Society
Abbreviated titleEMBC 2020
Country/TerritoryCanada
CityQuébec
Period20/07/2024/07/20
Internet address

Keywords

  • Tunneling magnetoresistance
  • Muscles
  • Magnetic sensors
  • Magnetic field measurement
  • Magnetic fields
  • Electromyography

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