Abstract
We propose a novel non-contact rotational sensor based on a fiber Bragg grating (FBG) packaged in a core of a magnetic head, which converts the introduced strain from the circular magnetic railings ruler into the rotational information. A mathematical model is built for processing the data obtained by an interrogator, and the accuracy and resolution of the measurements are analyzed by altering the radius and period of the circular magnetic railings ruler, as well as the dimension of the sensor. The experimental results show that it is in good accordance with the theoretical analysis on rotational angle, and the fitting results indicate that the results obtained from the rotational sensor match very well with the real rotational velocity with a linearity of 0.998 and a standard error of about 0.01.
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This work has been supported by the Program for Cheung Kong Scholars and Innovative Research Team in University (No.IRT1212), the Project Plan of Beijing Municipal Science and Technology Commission (No.Z151100003615010), and the Project Plan of Beijing Municipal Education Commission for Enhancing the Innovation Capability in 2015 (No.TJSHG201510772016).
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Lu, Ld., Li, H., Yao, Qf. et al. Design and characteristics of a non-contact rotational sensor based on a fiber Bragg grating. Optoelectron. Lett. 12, 421–425 (2016). https://doi.org/10.1007/s11801-016-6172-5
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DOI: https://doi.org/10.1007/s11801-016-6172-5