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17 May 2011 Long-gauge strain sensors for underwater and deep-water applications
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Proceedings Volume 7753, 21st International Conference on Optical Fiber Sensors; 77535R (2011) https://doi.org/10.1117/12.887336
Event: 21st International Conference on Optical Fibre Sensors (OFS21), 2011, Ottawa, Canada
Abstract
The evaluation of the structural performance of marine structures, such as ship hulls, off-shore platforms and risers requires the monitoring of the static and dynamic strain levels undergone during the whole lifetime. In these environments, the use of passive fiber optic sensors presents advantages in terms of reliability and multiplexing ability. Frequently used structural materials, such as steel and composites, exhibit local defects or discontinuities, such as welds, thickness / diameter variations, marine growths and cracks, introducing discontinuities in the mechanical properties of the material at a local level. Yet, the properties of the material at a global level are more indicative for structural behavior. Therefore, for structural monitoring purposes, it is necessary to use sensors that are insensitive to local material discontinuities. A long-gauge strain or deformation sensor, by definition, is a sensor with a gauge-length several times larger than the maximal distance between discontinuities or the maximal diameter of defects in the monitored material. In this paper we will present the design, testing and applications of a long-gauge fiber optics strain sensor for underwater applications.
© (2011) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Daniele Inaudi "Long-gauge strain sensors for underwater and deep-water applications", Proc. SPIE 7753, 21st International Conference on Optical Fiber Sensors, 77535R (17 May 2011); https://doi.org/10.1117/12.887336
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