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Asymmetric spectrum demodulation method of fiber Bragg grating sensor based on distributed estimation algorithm

A technology of optical fiber Bragg and distributed estimation, applied in the direction of converting sensor output, using optical devices to transmit sensing components, instruments, etc., can solve problems such as difficult to be demodulated by asymmetric spectrum, FBG loses sensing ability, etc., to achieve enhanced solution The effect of ability

Active Publication Date: 2019-10-01
FUZHOU UNIV
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  • Claims
  • Application Information

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Problems solved by technology

[0005] The typical characteristics of FBG asymmetric spectrum include spectral peak side shifting, spectral top broadening, and local deformation of the spectrum, etc. These asymmetric spectra are difficult to be demodulated, so that FBG loses its sensing ability

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  • Asymmetric spectrum demodulation method of fiber Bragg grating sensor based on distributed estimation algorithm
  • Asymmetric spectrum demodulation method of fiber Bragg grating sensor based on distributed estimation algorithm
  • Asymmetric spectrum demodulation method of fiber Bragg grating sensor based on distributed estimation algorithm

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Embodiment Construction

[0029] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0030] It should be pointed out that the following detailed description is exemplary and intended to provide further explanation to the present application. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.

[0031] It should be noted that the terminology used here is only for describing specific implementations, and is not intended to limit the exemplary implementations according to the present application. As used herein, unless the context clearly dictates otherwise, the singular is intended to include the plural, and it should also be understood that when the terms "comprising" and / or "comprising" are used in this specification, they mean There are features, steps, operations, means, components and / or combinatio...

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Abstract

The invention relates to an asymmetric spectrum demodulation method of a fiber Bragg grating sensor based on a distributed estimation algorithm. A fiber Bragg grating (FBG) asymmetric spectrum model is constructed by using the distributed estimation algorithm, a wavelength demodulation work is completed under the condition of spectrum asymmetry generated by the reflection spectrum of FBG due to environmental influence, the asymmetric spectrum demodulation method provided by the invention can not only satisfy the high-precision demodulation requirement of normal spectra, but also can be used for maximally demodulating the asymmetric spectrum, and enhancing the demodulation capability of the asymmetric spectrum by an FBG sensor network.

Description

technical field [0001] The invention relates to the field of optical fiber gratings, in particular to an asymmetric spectrum demodulation method of an optical fiber Bragg grating sensor based on a distributed estimation algorithm. Background technique [0002] Fiber Bragg Grating (FBG), as a new generation sensor, is a research hotspot in the field of sensing in recent years, and is widely used in the fields of electric power industry, civil engineering, aerospace, petrochemical and medical treatment. Fiber Bragg grating sensing technology has the advantages of non-electrical detection, anti-electromagnetic interference, high temperature resistance, zero drift, high precision, and small size, and is a promising substitute for traditional sensors. Since fiber Bragg gratings use light instead of electricity, they are not affected by electromagnetic fields and are easy to reuse. Their negligible size and weight and high water resistance make them easy to embed within materials...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01D5/353
CPCG01D5/35316
Inventor 江灏曾琦颖陈静缪希仁
Owner FUZHOU UNIV