A Magnetostrictive Composite-Fiber Bragg Grating Sensor

Sensors

Sully M. M. Quintero¹  Arthur M. B. Braga¹  Hans I. Weber¹  Antonio C. Bruno² 

[1] Department of Mechanical Engineering, Pontifical Catholic University of Rio de Janeiro, Rua Marquês de São Vicente 225, Gávea 22453-900, Rio de Janeiro, RJ, Brazil; E-Mails:;Department of Physics, Pontifical Catholic University of Rio de Janeiro, Rua Marquês de São Vicente 225, Gávea 22453-900, Rio de Janeiro, RJ, Brazil; E-Mails:

关键词: magnetic field sensor;    fiber Bragg grating;    magnetostrictive composite;   

DOI  :  10.3390/s100908119

来源: mdpi

【 摘 要 】

This paper presents a light and compact optical fiber Bragg Grating sensor for DC and AC magnetic field measurements. The fiber is coated by a thick layer of a magnetostrictive composite consisting of particles of Terfenol-D dispersed in a polymeric matrix. Among the different compositions for the coating that were tested, the best magnetostrictive response was obtained using an epoxy resin as binder and a 30% volume fraction of Terfenol-D particles with sizes ranging from 212 to 300 μm. The effect of a compressive preload in the sensor was also investigated. The achieved resolution was 0.4 mT without a preload or 0.3 mT with a compressive pre-stress of 8.6 MPa. The sensor was tested at magnetic fields of up to 750 mT under static conditions. Dynamic measurements were conducted with a magnetic unbalanced four-pole rotor.

【 授权许可】

CC BY   
© 2010 by the authors; licensee MDPI, Basel, Switzerland.