High-precision adaptive filtering FBG spectral rapid peak searching method
The invention discloses a high-precision adaptive filtering FBG spectral rapid peak searching method. The method is characterized by according to an acquired central wavelength lambda0 of an FBG spectrum under an indoor environment, cutting FBG spectrum data to acquire an FBG spectrum data subset; c...
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Format: | Patent |
Sprache: | chi ; eng |
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Zusammenfassung: | The invention discloses a high-precision adaptive filtering FBG spectral rapid peak searching method. The method is characterized by according to an acquired central wavelength lambda0 of an FBG spectrum under an indoor environment, cutting FBG spectrum data to acquire an FBG spectrum data subset; carrying out energy maximum detection PMax on the FBG spectrum data subset and taking lambdaMax as a center and shifting 2.5nm to left and right sides respectively; selecting and constructing a spectrum energy array P[i] which participates in peak searching; carrying out adaptive zero phase filtering on the spectrum energy array P[i], calculating an optimal cutoff frequency, carrying out low pass filtering and acquiring a filtered array p[i] and acquiring an FBG spectrum accurate peak point. By using the method, the algorithm is simple and rapid, a participated peak searching data amount is less |
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