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Proceedings Article

Full-spectral interrogation of fiber Bragg grating sensors for damage identification

[+] Author Affiliations
S. Webb, A. Noevere, K. Peters, M. A. Zikry

North Carolina State Univ. (USA)

T. Vella, S. Chadderdon, R. Selfridge, S. Schultz

Brigham Young Univ. (USA)

Proc. SPIE 7982, Smart Sensor Phenomena, Technology, Networks, and Systems 2011, 79820C (April 15, 2011); doi:10.1117/12.881093
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From Conference Volume 7982

  • Smart Sensor Phenomena, Technology, Networks, and Systems 2011
  • Wolfgang Ecke; Kara J. Peters; Theodore E. Matikas
  • San Diego, California, USA | March 06, 2011

abstract

In this study we evaluate the measurements of a fiber Bragg grating (FBG) sensor subjected to a non-uniform static strain state and simultaneously exposed to vibration loading. The full spectral response of the sensor is interrogated in reflection at 100 kHz during two loading cases: with and without an added vibration load spectrum. The static tensile loading is increased between each test, in order to increase the magnitude of the non-uniform strain field applied to the FBG sensor. The spectral distortion due to non-uniform strain is observed to change once the sensor is exposed to a non-transient 150 Hz vibration spectrum. With high-speed full spectral interrogation, it is potentially possible to separate this vibration-induced spectral change from spectral distortions due to non-uniform strain. Such spectral distortion contains valuable information on the static damage state of the surrounding host material.

© (2011) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Citation

S. Webb ; A. Noevere ; K. Peters ; M. A. Zikry ; T. Vella, et al.
"Full-spectral interrogation of fiber Bragg grating sensors for damage identification", Proc. SPIE 7982, Smart Sensor Phenomena, Technology, Networks, and Systems 2011, 79820C (April 15, 2011); doi:10.1117/12.881093; http://dx.doi.org/10.1117/12.881093


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