Volume 4, Issue 1 (1-2017)                   WJEPAS 2017, 4(1): 1-7 | Back to browse issues page

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G. Babaev O, A. Matyunin S. The linearization method of positional response curve of the fiber-optic displacement sensor. WJEPAS. 2017; 4 (1) :1-7
URL: http://europeansp.org/article-15-135-en.html
Samara University, Moskovskoye shosse 34, Samara, 443086, Russia
Abstract:   (311 Views)
Currently, one of the most actual problems in measuring technique is the creation of optical instruments for measuring of linear displacement. The most interesting fiber-optic sensors based on the magneto-optical effect. They are essentially contactless, non-electrical and have closed optical channel resistant to contamination. The main problem of this type of sensors is the non-linearity of positional response curve due to the hyperbolic nature of changing of the magnetic field intensity induced by moving magnetic source mounted on the controlled object relative to the sensing element. This paper discusses the algorithmic method of positional response curve linearization for fiber-optic displacement sensors in any selected range of measured displacements. The method is divided into two stages: 1 - definition of the calibration function, 2 – measurement and linearization of positional response curve (including its temperature stabilization). This algorithm significantly reduces the number of points of the calibration function due to usage of the points randomly deviate from grid points with uniform spacing. Subsequent interpolation of deviating points and piecewise linear-plane approximation reduces the amount of microcontroller memory for storing calibration function and the time required for processing of measurement results. This paper also presents test data of real samples of fiber-optic displacement sensors. © 2016 The Authors. Published by European Science publishing Ltd. Selection and peer-review under responsibility of the Organizing Committee of European Science publishing Ltd.
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Received: 2019/08/8 | Accepted: 2019/08/8 | Published: 2019/08/8

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