Related Experiment Video
Updated: Feb 11, 2026

Design, Instrumentation and Usage Protocols for Distributed In Situ Thermal Hot Spots Monitoring in Electric Coils using FBG Sensor Multiplexing
Published on: March 8, 2020
Measurement accuracy of FBG used as a surface-bonded strain sensor installed by adhesive
Abstract:
Material and dimensional properties of surface-bonded fiber Bragg gratings (FBGs) can distort strain measurement, thereby lowering the measurement accuracy. To accurately assess measurement precision and correct obtained strain, a new model, considering reinforcement effects on adhesive and measured object, is proposed in this study, which is verified to be accurate enough by the numerical method. Meanwhile, a theoretical strain correction factor is obtained, which is demonstrated to be significantly sensitive to recoating material and bonding length, as suggested by numerical and experimental results. It is also concluded that a short grating length as well as a thin but large-area (preferably covering the whole FBG) adhesive can enhance the correction precision.
Related Concept Videos
Uncertainty in Measurement: Accuracy and Precision
Measurements of Strain
Adhesion
Capillary action is a result of water’s adhesive tendencies. When a narrow...
Bond Energies and Bond Lengths
Peptide Bonds
Bonding in Metals

