Signal characteristics of the surface bonded fiber Bragg grating sensors by bonding length under different load types

Hyunseok Kwon; Yurim Park; Pratik Shrestha; Chun-Gon Kim

doi:10.1117/12.2267626

23 April 2017 Signal characteristics of the surface bonded fiber Bragg grating sensors by bonding length under different load types

Hyunseok Kwon, Yurim Park, Pratik Shrestha, Chun-Gon Kim

Author Affiliations +

Proceedings Volume 10323, 25th International Conference on Optical Fiber Sensors; 103239H (2017) https://doi.org/10.1117/12.2267626
Event: 25th International Conference on Optical Fiber Sensors, 2017, Jeju, Korea, Republic of

Abstract

The surface-bonding method of the fiber Bragg grating(FBG) sensor is easier to handle than embedding method. However surface bonded FBG sensors have the limitation of the signal characteristics being affected by the bonding layer. In this study, the effects of the bonding length on the surface installed FBG sensor signal characteristics under various load types were empirically investigated. To evaluate the stability of the signal characteristics of the FBG sensors, the strain transfer rate and the multiple peaks ratio of the reflected spectrum were calculated and compared. From the experimental results, the strain transfer ratio and multiple peaks ratio varied because of the different strain gradients formed depending on the applied load type. Therefore, it was found that the effective bonding length for respective load types need to be determined to get a stable signal from the surface bonded FBG sensors.

Citation Download Citation

Hyunseok Kwon, Yurim Park, Pratik Shrestha, and Chun-Gon Kim "Signal characteristics of the surface bonded fiber Bragg grating sensors by bonding length under different load types", Proc. SPIE 10323, 25th International Conference on Optical Fiber Sensors, 103239H (23 April 2017); https://doi.org/10.1117/12.2267626

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