Optical fiber wavelength demodulating light spectrum peak value positioning method

A wavelength demodulation and positioning method technology, which is applied in the optical fiber wavelength demodulation spectral peak positioning, and the optical fiber wavelength demodulation spectral peak positioning field based on the LM algorithm, can solve the problems of inaccurate wavelength demodulation and difficult application, and achieve easy realization. , the effect of improving accuracy and simplifying the data processing process
CN102706372AActive Publication Date: 2012-10-03BEIJING CHANGCHENG INST OF METROLOGY & MEASUREMENT AVIATION IND CORP OF CHINA
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
BEIJING CHANGCHENG INST OF METROLOGY & MEASUREMENT AVIATION IND CORP OF CHINA
Publication Date
2012-10-03

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Abstract

The invention relates to an optical fiber wavelength demodulating light spectrum peak value positioning method, belonging to the technical field of optical fiber sensing. The method comprises the following steps: firstly, carrying out maximum value detection on obtained diffraction light spectrum energy data; determining a suitable threshold value according to a maximum value and utilizing the threshold value to carry out peak searching treatment; constructing a fitting array by the processed data; and utilizing an LM peak value positioning algorithm to carry out accurate peak value positioning on the spectrum. Compared with the existing power weighted algorithm and Gaussian-polynomial fitting algorithm, the algorithm has the advantages of high-precision positioned light spectrum peak value; and the method is easy to realize on a digital television through a simplified data processing process.
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Description

technical field

[0001] The invention relates to a method for locating a peak value of an optical fiber wavelength demodulation spectrum, in particular to a method for locating a peak value of an optical fiber wavelength demodulation spectrum based on an LM algorithm, and belongs to the technical field of optical fiber sensing. Background technique

[0002] As a sensitive element, fiber grating (FBG) has been widely used in the field of optical fiber sensing technology. The sensor using FBG as a sensitive element, its sensing principle is based on the relationship between the central wavelength of the FBG reflection spectrum and the strain or temperature change it is subjected to, so accurate reading of the central wavelength value of the FBG reflection spectrum is crucial to improving the performance of the FBG sensor important.

[0003] Conventional optical fiber wavelength demodulation spectrum peak location methods mostly use power weighting algorithm, Gaussian-polynomia...

Claims

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