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Determination of the values and direction of bends and deformations using sensors on fiber-optic interferometers

UDC 621.372.8
Authors Konoyko Aleksey Ivanovich, PhD in Physico-Mathematical Sciences, Associate Professor
Ryabtsev Vitaliy Nikolaevich
Abstract Purpose. The purpose of the paper is to demonstrate the design and operation principles of the vector sensor on the base of Michelson fiber-optic interferometer, which allows measuring the values and direction of bends and deformations in the plane of displacement of controlled objects with high accuracy.
Findings. The results of experimental studies of the laboratory sample of the sensor showed the correspondence of the position of the side peaks of the interference pattern at the output from the second interferometer to the values and direction of the real displacement of the measuring fiber.
Application field of research. The developed structure and operating principle of the fiber-optic vector sensor of bends and stresses can serve as a basis for creating fiber-optic bending, pressure and displacement sensors.
Conclusions. The presented research showed the possibility of the accurate estimating the value and direction of the controlled object deformation with the help of the optical fiber sensor on the base of two interferometers with the use of radiation on two wavelengths.
Keywords fiber optic sensors, vector bend sensor, Michelson fiber optic interferometer, interference pattern shift, bends and stresses, deformation value and direction
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