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

S. Webb; A. Noevere; K. Peters; M. A. Zikry; T. Vella; S. Chadderdon; R. Selfridge; S. Schultz

doi:10.1117/12.881093

15 April 2011 Full-spectral interrogation of fiber Bragg grating sensors for damage identification

S. Webb, A. Noevere, K. Peters, M. A. Zikry, T. Vella, S. Chadderdon, R. Selfridge, S. Schultz

Proceedings Volume 7982, Smart Sensor Phenomena, Technology, Networks, and Systems 2011; 79820C (2011) https://doi.org/10.1117/12.881093
Event: SPIE Smart Structures and Materials + Nondestructive Evaluation and Health Monitoring, 2011, San Diego, California, United States

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.

Citation Download Citation

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

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