Calibration method for fiber bragg grating temperature sensor

Author

Zhang, Jing ; Li, Yongqian

Author_Institution

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

fYear

2009

fDate

16-19 Aug. 2009

Abstract

A successful nonlinear calibration method for fiber Bragg grating (FBG) temperature sensor system based on wavelength-division multiplexing was proposed and demonstrated theoretically and experimentally. In consideration of the nonlinear relation between FBG center wavelength and temperature due to thermal expansion and thermo-optic effect, linear and nonlinear curve fittings were used to evaluate the measurement errors in data processing respectively, measurement errors were calculated. As a result, the maximum error is reduced from 0.15 degC to 0.08 degC when the temperature is in the range -5 degC to 35 degC. Experimental result shows that nonlinear calibration method achieved a higher precision.

Keywords

Bragg gratings; calibration; curve fitting; fibre optic sensors; measurement errors; optical fibres; temperature sensors; wavelength division multiplexing; curve fitting; fiber Bragg grating temperature sensor; measurement error; nonlinear calibration method; thermal expansion; wavelength-division multiplexing; Bragg gratings; Calibration; Curve fitting; Data processing; Fiber gratings; Measurement errors; Temperature sensors; Thermal expansion; Thermooptic effects; Wavelength division multiplexing; Bragg Grating Sensor; curve fitting; thermal expansion coefficient; thermo-optic effect;

fLanguage

English

Publisher

ieee

Conference_Titel

Electronic Measurement & Instruments, 2009. ICEMI '09. 9th International Conference on

Conference_Location

Beijing

Print_ISBN

978-1-4244-3863-1

Electronic_ISBN

978-1-4244-3864-8

Type

conf

DOI

10.1109/ICEMI.2009.5274437

Filename

5274437