A fiber optic Magnetic Sensor Utilizing Giant Magnetostrictive Materials and Fiber Bragg Grating Fabry-Perot Cavity
[1]Mary,Zhang Wentao,Li Fang.A fiber optic Magnetic Sensor Utilizing Giant Magnetostrictive Materials and Fiber Bragg Grating Fabry-Perot Cavity[J].Journal of Zhengzhou University (Engineering Science),2019,40(06):6-10.[doi:10.13705/j.issn.1671-6833.2019.06.008]
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Journal of Zhengzhou University (Engineering Science)[ISSN
1671-6833/CN
41-1339/T] Volume:
40卷
Number of periods:
2019 06
Page number:
6-10
Column:
Public date:
2019-11-16
- Title:
- A fiber optic Magnetic Sensor Utilizing Giant Magnetostrictive Materials and Fiber Bragg Grating Fabry-Perot Cavity
- Keywords:
- Fiber Optic Sensor; Fiber Bragg Grating Fabry-Perot cavity; Magnetostrictive materials; magnetic field; temperature
- CLC:
- TN29
- DOI:
- 10.13705/j.issn.1671-6833.2019.06.008
- Abstract:
- In order to measure static magnetic field, this paper presents a novel optical fiber magnetic field sensor with the resolution of μT level. This sensor is expected to be used in resource exploration, power grid monitoring, geomagnetic navigation and so on. FBG-FP coupled with Terfenol-D is used as sensing element, and a NdFeB magnet is used to apply bias magnetic field. Meanwhile, to compensate the environmental temperature, another FBG-FP coupled with Monel-400 is used as a reference. The measurement sensitivity of the sensor is 1.5×10-3 pm/μT, which results in a magnetic induction resolution of 0.67 μT. The experimental results show that the sensor exhibits excellent linearity and directivity in response to static magnetic field
- References:
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Last Update:
2019-11-23