High accuracy FBG temperature sensor based on quadratic polynomial fitting

Fei Zhang; Sumei Wang; Da Liu; Zhitao Cao

doi:10.3788/gxjs20154101.0003

High accuracy FBG temperature sensor based on quadratic polynomial fitting

Fei Zhang, Sumei Wang^*, Da Liu, Zhitao Cao

^*Corresponding author for this work

School of Mechanical Engineering

Beijing Institute of Technology

Research output: Contribution to journal › Article › peer-review

3 Citations (Scopus)

Abstract

In order to improve the accuracy of the FBG temperature sensor, a new packaging method is proposed and the detected temperatures are fitted by quadratic polynomial function. The new packaging method can eliminate the cross-sensitivity of stress. Linear fitting and quadratic polynomial fitting are applied respectively, and the sensor demonstrates good stability and repeatability by quadratic polynomial fitting. The degree of the quadratic polynomial fitting is greater than 0.9999 and the temperature error is less than 0.13℃ in the temperature range of 0℃~80℃. The proposed sensor can be applied in engineering practice with good accuracy and reliability.

Original language	English
Pages (from-to)	3-6
Number of pages	4
Journal	Guangxue Jishu/Optical Technique
Volume	41
Issue number	1
DOIs	https://doi.org/10.3788/gxjs20154101.0003
Publication status	Published - 1 Jan 2015

Keywords

FBG
Quadratic polynomial fitting
Temperature sensor

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AU - Zhang, Fei

AU - Wang, Sumei

AU - Liu, Da

AU - Cao, Zhitao

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N2 - In order to improve the accuracy of the FBG temperature sensor, a new packaging method is proposed and the detected temperatures are fitted by quadratic polynomial function. The new packaging method can eliminate the cross-sensitivity of stress. Linear fitting and quadratic polynomial fitting are applied respectively, and the sensor demonstrates good stability and repeatability by quadratic polynomial fitting. The degree of the quadratic polynomial fitting is greater than 0.9999 and the temperature error is less than 0.13℃ in the temperature range of 0℃~80℃. The proposed sensor can be applied in engineering practice with good accuracy and reliability.

AB - In order to improve the accuracy of the FBG temperature sensor, a new packaging method is proposed and the detected temperatures are fitted by quadratic polynomial function. The new packaging method can eliminate the cross-sensitivity of stress. Linear fitting and quadratic polynomial fitting are applied respectively, and the sensor demonstrates good stability and repeatability by quadratic polynomial fitting. The degree of the quadratic polynomial fitting is greater than 0.9999 and the temperature error is less than 0.13℃ in the temperature range of 0℃~80℃. The proposed sensor can be applied in engineering practice with good accuracy and reliability.

KW - FBG

KW - Quadratic polynomial fitting

KW - Temperature sensor

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JF - Guangxue Jishu/Optical Technique

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High accuracy FBG temperature sensor based on quadratic polynomial fitting

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Keywords

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