TY - JOUR
T1 - Strain transfer effect in distributed fiber optic sensors under an arbitrary field
AU - Tan, Xiao
AU - Bao, Yi
AU - Zhang, Qinghua
AU - Nassif, Hani
AU - Chen, Genda
N1 - Publisher Copyright:
© 2021 Elsevier B.V.
PY - 2021/4
Y1 - 2021/4
N2 - Optical fibers with protective coatings have been used as distributed strain sensors for automated inspection in the construction, operation, and maintenance of various engineering structures. The presence of the protective coatings causes strain transfer effect, which can change the strain measurement of the distributed sensors. This study quantitatively evaluates the strain transfer for distributed fiber optic sensors subjected to an arbitrary strain field for the first time. Theoretical studies are performed to derive closed-form solutions for describing the strain transfer, and high-resolution (sub-millimeter) strain distributions were measured to validate the theoretical study. This study demonstrates that the strain transfer effect is dependent on the strain field in the host matrix, and the derived formulae enable correct interpretation of the strain measurement from the distributed sensor. This study provides theoretical foundations for using distributed fiber optic sensors to accurately measure strain distributions in engineering structures.
AB - Optical fibers with protective coatings have been used as distributed strain sensors for automated inspection in the construction, operation, and maintenance of various engineering structures. The presence of the protective coatings causes strain transfer effect, which can change the strain measurement of the distributed sensors. This study quantitatively evaluates the strain transfer for distributed fiber optic sensors subjected to an arbitrary strain field for the first time. Theoretical studies are performed to derive closed-form solutions for describing the strain transfer, and high-resolution (sub-millimeter) strain distributions were measured to validate the theoretical study. This study demonstrates that the strain transfer effect is dependent on the strain field in the host matrix, and the derived formulae enable correct interpretation of the strain measurement from the distributed sensor. This study provides theoretical foundations for using distributed fiber optic sensors to accurately measure strain distributions in engineering structures.
KW - Condition assessment
KW - Distributed fiber optic sensor
KW - Non-uniform strain field
KW - Optical Frequency Domain Reflectometry (OFDR)
KW - Strain transfer
KW - Structural health monitoring
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U2 - 10.1016/j.autcon.2021.103597
DO - 10.1016/j.autcon.2021.103597
M3 - Article
AN - SCOPUS:85100247959
SN - 0926-5805
VL - 124
JO - Automation in Construction
JF - Automation in Construction
M1 - 103597
ER -