Materials, Photonic Devices, and Sensors

Development of thin-slice fiber Bragg grating-giant magnetostrictive material sensors used for measuring magnetic field of magnetic bearings

[+] Author Affiliations
Guoping Ding, Huaqiang Wang, Bin Gao, Biyun Zhang

Wuhan University of Technology, School of Mechanical and Electronic Engineering, 122 Luoshi Road, Wuhan, Hubei 430070, China

Jiayi Liu

Wuhan University of Technology, School of Information Engineering, 122 Luoshi Road, Wuhan, Hubei 430070, China

Opt. Eng. 54(10), 107102 (Oct 07, 2015). doi:10.1117/1.OE.54.10.107102
History: Received June 15, 2015; Accepted September 9, 2015
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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 1.5mm×14mm×7mm 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 1089.056pm/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.

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© 2015 Society of Photo-Optical Instrumentation Engineers

Citation

Guoping Ding ; Huaqiang Wang ; Jiayi Liu ; Bin Gao and Biyun Zhang
"Development of thin-slice fiber Bragg grating-giant magnetostrictive material sensors used for measuring magnetic field of magnetic bearings", Opt. Eng. 54(10), 107102 (Oct 07, 2015). ; http://dx.doi.org/10.1117/1.OE.54.10.107102


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