Full spectral interrogation of fiber Bragg grating sensors for measurements of damage during steady-state vibration

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

doi:10.1117/12.915150

30 March 2012 Full spectral interrogation of fiber Bragg grating sensors for measurements of damage during steady-state vibration

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

Author Affiliations +

Proceedings Volume 8346, Smart Sensor Phenomena, Technology, Networks, and Systems Integration 2012; 83460C (2012) https://doi.org/10.1117/12.915150
Event: SPIE Smart Structures and Materials + Nondestructive Evaluation and Health Monitoring, 2012, 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. During steady-state vibration, the behavior of the spectral shape of the FBG reflection varies depending on the extent of non-uniform strain. 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, K. Peters, M. A. Zikry, S. Chadderdon, R. Selfridge, and S. Schultz "Full spectral interrogation of fiber Bragg grating sensors for measurements of damage during steady-state vibration", Proc. SPIE 8346, Smart Sensor Phenomena, Technology, Networks, and Systems Integration 2012, 83460C (30 March 2012); https://doi.org/10.1117/12.915150

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