Publikacje

Streszczenie:

W artykule przedstawiono badania symulacyjne jednoczesnego odtwarzania niegładkiego rozkładu odkształcenia światłowodowej siatki Bragga i jej temperatury, które bazują na widmie natężeniowym wiązki odbitej tej siatki. Do modelowania widma natężeniowego siatki wykorzystano metodę macierzy przejścia, a do jednoczesnego odtwarzania rozkładu odkształcenia wzdłuż siatki i jej temperatury, zastosowano nieliniową metodę optymalizacji Nelder-Mead’a. Wyniki przeprowadzonych symulacji jednoczesnego odtwarzania profilu odkształcenia i temperatury wskazują na dobrą ich zgodność z zadanymi profilami odkształcenia i zadaną temperaturą. Błędy rekonstrukcji profili odkształcenia nie przekraczają 1.2 % procenta, a błędy zmiany temperatury są mniejsze od 0.2 %, przy poziomie szumów 5%.

Abstract:

This paper presents a simulation study of the simultaneous reconstruction of the non-smooth strain distribution of an optical fiber Bragg grating and its temperature, which is based on the reflection spectrum of the reflected beam of the grating. The transition matrix method was used to model the reflection spectrum of the grating, and the nonlinear Nelder-Mead optimization method was used to simultaneously reconstruct the strain distribution along the grating and its temperature. The results of simulations of simultaneous reconstruction of the strain profile and temperature indicate good accord with the strain profiles and temperature set. The reconstruction errors of the strain profiles are less than 1.2 percent and the temperature change errors are less than 0.2 percent, with a noise level of 5 percent.

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https://doi.org/10.1137/S1052623496303470

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Reconstruction of strains with a non-smooth distribution and temperature using optical fiber Bragg grating.