Title :
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
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;
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
DOI :
10.1109/ICEMI.2009.5274437
