Fiber Bragg grating length as sensing parameter: new way for fibre optic wear sensors

A. A. Kuznetsov; O. G. Morozov; I. I. Nureev; L. M. Faskhutdinov; A. J. Sakhabutdinov; V. I. Artemiev

doi:10.1117/12.2318837

6 June 2018 Fiber Bragg grating length as sensing parameter: new way for fibre optic wear sensors

A. A. Kuznetsov, O. G. Morozov, I. I. Nureev, L. M. Faskhutdinov, A. J. Sakhabutdinov, V. I. Artemiev

Proceedings Volume 10774, Optical Technologies in Telecommunications 2017; 107741G (2018) https://doi.org/10.1117/12.2318837
Event: XV International Scientific and Technical Conference on Optical Technologies in Telecommunications, 2017, Kazan, Russian Federation

Abstract

This article deals with problem of carbon brush`s length measurements. There are many applications where regular inspection is not feasible because of a number of factors including, for example, time, labor, cost and disruptions due to down time. Thus, there is a need for a system that can monitor the brush`s length to calculate it`s wear rate, while the component is in operation or without removing of the component from its operational position. We propose a novel method for characterization of carbon brush`s length. This method based on the usage of advantages of the multiplicative response of FBGs and FBG arrays: spectral parameters depend on several aspects, such as grating`s period, refractive index, it`s physical length and so on. We are the first, in our point of view, who proposed to use third parameter for sensing application and prospectively all three parameters for complex measurement: the change of FBG`s length is used to measure length of the brush and it`s wear rate, grating`s central wavelength shift for temperature (due to refractive index change) and mechanical stress (due to grating`s period variations) measurements. The results of modelling and experiments are presented.

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A. A. Kuznetsov, O. G. Morozov, I. I. Nureev, L. M. Faskhutdinov, A. J. Sakhabutdinov, and V. I. Artemiev "Fiber Bragg grating length as sensing parameter: new way for fibre optic wear sensors", Proc. SPIE 10774, Optical Technologies in Telecommunications 2017, 107741G (6 June 2018); https://doi.org/10.1117/12.2318837

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KEYWORDS

Fiber Bragg gratings

Sensors

Reflectivity

Carbon

Fiber optics

Temperature metrology

Optical fibers

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