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Model and Experimental Study on Optical Fiber CT Based on Terfenol-D
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Model and Experimental Study on Optical Fiber CT Based on Terfenol-D
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Journal Article
Model and Experimental Study on Optical Fiber CT Based on Terfenol-D
2020
Overview
A nonlinear hysteresis model of magneto-mechanical-thermo coupling for Terfenol-D materials is presented according to Wiss ferromagnetic theory, thermodynamics relations and Jiles–Atherton model. Numerical calculation and experimental results show that the mode well reflects the magnetostrictive characteristics of Terfenol-D rod under the coupling of stress, temperature and magnetic field. A fiber Bragg grating current transformer based on Terfenol-D material is designed according to the strain sensing mechanism of fiber Bragg grating and the demodulation principle of unbalanced M–Z interferometer. The theoretical analysis and research on the working characteristics of the fiber current transformer under the influence of different prestressing force and bias current are carried out. The results are important for the design and application of the current transformer with the Terfenol-D material.
Publisher
MDPI AG,MDPI
Subject
