MEMS Magnetic Field Source for Frequency Conversion Approaches for ME Sensors

Publikation: Beitrag in FachzeitschriftForschungsartikelBeigetragenBegutachtung

Beitragende

  • Johan Arbustini - , Christian-Albrechts-Universität zu Kiel (CAU) (Autor:in)
  • Johanna Muñoz - , Costa Rica Institute of Technology (Autor:in)
  • Huxi Wang - , University of Glasgow (Autor:in)
  • Eric Elzenheimer - , Christian-Albrechts-Universität zu Kiel (CAU) (Autor:in)
  • Johannes Hoffmann - , Christian-Albrechts-Universität zu Kiel (CAU) (Autor:in)
  • Lars Thormählen - , Christian-Albrechts-Universität zu Kiel (CAU) (Autor:in)
  • Patrick Hayes - , Christian-Albrechts-Universität zu Kiel (CAU) (Autor:in)
  • Florian Niekiel - , Fraunhofer-Institut für Siliziumtechnologie (Autor:in)
  • Hadi Heidari - , University of Glasgow (Autor:in)
  • Michael Höft - , Christian-Albrechts-Universität zu Kiel (CAU) (Autor:in)
  • Eckhard Quandt - , Christian-Albrechts-Universität zu Kiel (CAU) (Autor:in)
  • Gerhard Schmidt - , Christian-Albrechts-Universität zu Kiel (CAU) (Autor:in)
  • Andreas Bahr - , Christian-Albrechts-Universität zu Kiel (CAU) (Autor:in)

Abstract

Some magnetoelectric sensors require predefined external magnetic fields to satisfy optimal operation depending on their resonance frequency. While coils commonly generate this external magnetic field, a microelectromechanical systems (MEMS) resonator integrated with permanent magnets could be a possible replacement. In this proof-of-concept study, the interaction of a MEMS resonator and the ME sensor is investigated and compared with the standard approach to achieve the best possible sensor operation in terms of sensitivity. The achievable sensor sensitivity was evaluated experimentally by generating the magnetic excitation signal by a coil or a small-sized MEMS resonator. Moreover, the possibility of using both approaches simultaneously was also analysed. The MEMS resonator operated with 20 Vpp at 1.377 kHz has achieved a sensor sensitivity of 221.21 mV/T. This sensitivity is comparable with the standard approach, where only a coil for sensor excitation is used. The enhanced sensitivity of 277.0 mV/T could be identified by generating the excitation signal simultaneously by a coil and the MEMS resonator in parallel. In conclusion, these MEMS resonator methods can potentially increase the sensitivity of the ME sensor even further. The unequal excitation frequency of the MEMS resonator and the resonance frequency of the ME sensor currently limit the performance. Furthermore, the MEMS resonator as a coil replacement also enables the complete sensor system to be scaled down. Therefore, optimizations to match both frequencies even better are under investigation.

Details

OriginalspracheEnglisch
Seiten (von - bis)309-312
Seitenumfang4
FachzeitschriftCurrent Directions in Biomedical Engineering
Jahrgang8
Ausgabenummer2
PublikationsstatusVeröffentlicht - 1 Aug. 2022
Peer-Review-StatusJa
Extern publiziertJa

Externe IDs

ORCID /0000-0001-8012-6794/work/186621455

Schlagworte

ASJC Scopus Sachgebiete

Schlagwörter

  • Frequency conversion, Magnetic field measurements, Magnetoelectric sensor, MEMS resonator