Comparison of Peak Searching Algorithms for Wavelength Demodulation in Fiber Bragg Grating Sensors

Author

Li, Yongqian ; Xie, Yang ; Yao, Guozhen

Author_Institution

Dept. of Electron. & Commun. Eng., North China Electr. Power Univ., Baoding, China

fYear

2010

fDate

25-26 Dec. 2010

Firstpage

1

Lastpage

4

Abstract

A wavelength detection system of fiber Bragg grating (FBG) sensors is described. In order to obtain high detection precision and stability, four peak searching algorithms have been analyzed and compared, including differential method, centroid method, cross-correlation method, and Gaussian fitting method. The experimental results show that Gaussian fitting method is suitable for high precision demodulation system, and the maximum measurement error and standard deviation of center wavelength is 5 pm and 0.5 pm, respectively, corresponding to a maximum temperature measurement error and a accuracy of temperature measurement of 0.5 °C and 0.05 °C.

Keywords

Bragg gratings; fibre optic sensors; temperature measurement; Gaussian fitting method; centroid method; cross-correlation method; differential method; fiber Bragg grating sensors; maximum temperature measurement error; peak searching algorithms; wavelength demodulation; wavelength detection system; Demodulation; Fiber gratings; Fitting; Sensors; Temperature measurement; Wavelength measurement;

fLanguage

English

Publisher

ieee

Conference_Titel

Information Engineering and Computer Science (ICIECS), 2010 2nd International Conference on

Conference_Location

Wuhan

ISSN

2156-7379

Print_ISBN

978-1-4244-7939-9

Electronic_ISBN

2156-7379

Type

conf

DOI

10.1109/ICIECS.2010.5678281

Filename

5678281