This paper presents a new concept of magnetic field sensor, employing a magnetostrictive active material and a strain sensor based on a fiber Bragg grating (FBG). The integration of the FBG with the magnetostrictive alloy, allows the transduction of the field signal into a wavelength shift of the FBG. Such an approach allows reliable and multipoint measurements also in harsh environments. Unlike a similar approach [6], the proposed concept sensor employ a Fe-Ga alloy (Galfenol), presenting better performances in terms of rate-independent memory effects (hysteresis) and this would avoid complex procedures for the field reconstruction. Moreover, the possibility to produce samples with frozen prestress in the material, would also allow a better tailoring of the active material with respect to the required sensor characteristics.

Galfenol-Based Devices for Magnetic Field Sensing in Harsh Environments

Davino D;Visone C
2014-01-01

Abstract

This paper presents a new concept of magnetic field sensor, employing a magnetostrictive active material and a strain sensor based on a fiber Bragg grating (FBG). The integration of the FBG with the magnetostrictive alloy, allows the transduction of the field signal into a wavelength shift of the FBG. Such an approach allows reliable and multipoint measurements also in harsh environments. Unlike a similar approach [6], the proposed concept sensor employ a Fe-Ga alloy (Galfenol), presenting better performances in terms of rate-independent memory effects (hysteresis) and this would avoid complex procedures for the field reconstruction. Moreover, the possibility to produce samples with frozen prestress in the material, would also allow a better tailoring of the active material with respect to the required sensor characteristics.
2014
Bragg gratings; magnetic sensors; magnetostrictive devices
File in questo prodotto:
Non ci sono file associati a questo prodotto.

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/20.500.12070/1092
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 6
  • ???jsp.display-item.citation.isi??? 4
social impact