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EnglishThis paper concerns the sensing of dynamic force/stress by means of a measuring system based on the use of an Fe-Ga sample (Galfenol) coupled to a magnetic circuit. The study is focused on the measurement of the effective magnetic field, detected at the rod specimen surface, and its variation DeltaHeff under time-dependent applied sinusoidal stress DeltaSigma oscillating at frequencies between 5 Hz and 20 Hz at different values of applied bias field Sigmabias (2.5 kA/m < Sigmabias < 27 kA/m). For the considered frequency and Hbias range, the measured DeltaHeff tends to linearly depend on DeltaSigma in contrast with the corresponding induction variation behavior (DeltaB - DeltaSigma), where hysteresis effects appear. With DeltaSigma in the range ± 15 MPa we obtain 0.06 MPa resolution in the determination of the alternating stress DeltaSigma, a result pointing to the effectiveness and sensitivity of this Galfenol-based method for detection and measurement of time-dependent stresses
Sensing dynamic forces by Fe-Ga in compression / Zucca, Mauro; Mei, Pasquale; Ferrara, Enzo; Fiorillo, Fausto. - In: IEEE TRANSACTIONS ON MAGNETICS. - ISSN 0018-9464. - (2017), pp. 1-4.
| Titolo: | Sensing dynamic forces by Fe-Ga in compression | |
| Autori: | ||
| Data di pubblicazione: | 2017 | |
| Rivista: | IEEE TRANSACTIONS ON MAGNETICS | |
| Digital Object Identifier (DOI): | http://dx.doi.org/10.1109/TMAG.2017.2701859 | |
| Abstract: | This paper concerns the sensing of dynamic force/stress by means of a measuring system based on t...he use of an Fe-Ga sample (Galfenol) coupled to a magnetic circuit. The study is focused on the measurement of the effective magnetic field, detected at the rod specimen surface, and its variation DeltaHeff under time-dependent applied sinusoidal stress DeltaSigma oscillating at frequencies between 5 Hz and 20 Hz at different values of applied bias field Sigmabias (2.5 kA/m < Sigmabias < 27 kA/m). For the considered frequency and Hbias range, the measured DeltaHeff tends to linearly depend on DeltaSigma in contrast with the corresponding induction variation behavior (DeltaB - DeltaSigma), where hysteresis effects appear. With DeltaSigma in the range ± 15 MPa we obtain 0.06 MPa resolution in the determination of the alternating stress DeltaSigma, a result pointing to the effectiveness and sensitivity of this Galfenol-based method for detection and measurement of time-dependent stresses | |
| Full-text (pubblici): | restricted | |
| Appare nelle tipologie: | 1.1 Articolo in rivista |
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