TY - JOUR
T1 - Improved temperature compensation of fiber Bragg grating-based sensors applied to structures under different loading conditions
AU - Wang, Hua Ping
AU - Dai, Jian Guo
AU - Wang, Xing Zhe
N1 - Funding Information:
The work described in this paper was supported by the Research Grants Council of the Hong Kong Special Administrative Region, China (Grant No. T22/502/18), the National Natural Science Foundation of China (Grant No. 51478406, 51908263 and 11932008), and The Hong Kong Polytechnic University (Grant No. 1-BBAG). The authors would also like to appreciate the funding support by the Fundamental Research Funds for the Central Universities (Grant No. lzujbky-2020-56), the Innovation and Technology Commission of the Hong Kong SAR Government (Project No. K-BBY1) and Key Lab of Structures Dynamic Behavior and Control (Harbin Institute of Technology) of Ministry of Education (HITCE201901). Special thanks are due to Prof. Jinping Ou and Prof. Zhi Zhou of Dalian University of Technology, and Prof. Youhe Zhou and Prof. Ning Huang of Lanzhou University. The findings and opinions expressed in this article are only those of the authors and do not necessarily reflect the views of the sponsors.
Publisher Copyright:
© 2021 Elsevier Inc.
Copyright:
Copyright 2021 Elsevier B.V., All rights reserved.
PY - 2021/5
Y1 - 2021/5
N2 - Fiber Bragg grating (FBG) based sensors have been extensively used to monitor the deformation of structures (i.e., aircrafts, ocean platforms, bridges, tunnels, pavements and high-speed railways), for the advantages of absolute measurement, anti-electromagnetic interference, high precision, multiplexing and integration of sensing network over other sensors. However, due to the temperature-sensitive characteristics of FBG, temperature compensation should be considered to remove the thermal effect, so as to accurately reflect the strain information of the monitored structure. Traditional temperature-compensation method ignores the influence of the interfacial interaction between the structure and the bonded FBG on the measured data, which may lead to the compensated value smaller than the actual value. For this reason, modified temperature-compensation function with the influence of interfacial action considered is proposed to enhance the measurement accuracy of FBG based sensors. Laboratory tests on two kinds of samples under temperature loading have been conducted to validate the effectiveness of the proposed function. Improved temperature-compensation measures for FBG based sensors applied to structures under different loading conditions (i.e., high and low temperature, static and dynamic mechanical load) are discussed, with the temperature hysteresis of FBG sensing elements considered. The study in this paper presents a scientific instruction for the better interpretation of testing data measured by FBG sensors and the accurate use of FBG sensors for the temperature and strain detection of structures in engineering
AB - Fiber Bragg grating (FBG) based sensors have been extensively used to monitor the deformation of structures (i.e., aircrafts, ocean platforms, bridges, tunnels, pavements and high-speed railways), for the advantages of absolute measurement, anti-electromagnetic interference, high precision, multiplexing and integration of sensing network over other sensors. However, due to the temperature-sensitive characteristics of FBG, temperature compensation should be considered to remove the thermal effect, so as to accurately reflect the strain information of the monitored structure. Traditional temperature-compensation method ignores the influence of the interfacial interaction between the structure and the bonded FBG on the measured data, which may lead to the compensated value smaller than the actual value. For this reason, modified temperature-compensation function with the influence of interfacial action considered is proposed to enhance the measurement accuracy of FBG based sensors. Laboratory tests on two kinds of samples under temperature loading have been conducted to validate the effectiveness of the proposed function. Improved temperature-compensation measures for FBG based sensors applied to structures under different loading conditions (i.e., high and low temperature, static and dynamic mechanical load) are discussed, with the temperature hysteresis of FBG sensing elements considered. The study in this paper presents a scientific instruction for the better interpretation of testing data measured by FBG sensors and the accurate use of FBG sensors for the temperature and strain detection of structures in engineering
KW - Data interpretation
KW - FBG sensor
KW - Interfacial interaction
KW - Static and dynamic conditions
KW - Temperature compensation
KW - Thermal effect
UR - http://www.scopus.com/inward/record.url?scp=85102968437&partnerID=8YFLogxK
U2 - 10.1016/j.yofte.2021.102506
DO - 10.1016/j.yofte.2021.102506
M3 - Journal article
AN - SCOPUS:85102968437
SN - 1068-5200
VL - 63
JO - Optical Fiber Technology
JF - Optical Fiber Technology
M1 - 102506
ER -