7 October 2015 Development of thin-slice fiber Bragg grating-giant magnetostrictive material sensors used for measuring magnetic field of magnetic bearings
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Abstract
The magnetic field is a physical medium used to realize the levitation and motion control of magnetic bearings. It is necessary to conduct the air-gap flux density measurement so as to validate theoretical analyses and provide instructions for practical design. A thin-slice fiber Bragg grating-giant magnetostrictive material (FBG-GMM) sensor, in which the FBG was stuck perpendicular to the principal magnetostriction orientation of a thin GMM slice, was proposed to measure magnetic-flux density in the small air gap. The configuration of FBG-GMM sensor was the same with that of a sensor of 1.5  mm×14  mm×7  mm TbDyFe slice stuck with a 1300 nm-wavelength FBG on the side of the slice. The FBG-GMM magnetic field sensor was tested on an U-shape electromagnet test setup under static conditions. The sensor had a linear region of 0.121 to 0.261 T with the sensitivity of 1089.056  pm/T. The FBG-GMM magnetic field sensor was introduced to measure the air-gap flux density of radial magnetic bearings. Measurement of static flux density was conducted with 2 FBG-GMM sensors compensated with a temperature FBG; and the measured data showed that the FBG-GMM sensor had feasible linear region and sensitivity to measure the air-gap flux density of magnetic bearings.
© 2015 Society of Photo-Optical Instrumentation Engineers (SPIE)
Guoping Ding, Guoping Ding, Huaqiang Wang, Huaqiang Wang, Jiayi Liu, Jiayi Liu, Bin Gao, Bin Gao, Biyun Zhang, Biyun Zhang, } "Development of thin-slice fiber Bragg grating-giant magnetostrictive material sensors used for measuring magnetic field of magnetic bearings," Optical Engineering 54(10), 107102 (7 October 2015). https://doi.org/10.1117/1.OE.54.10.107102 . Submission:
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