Mr. Ming Li Profile

Ming Li

at Xi'an Research Institute of High Technology

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Proceedings Article | 24 August 2009 Paper

Study on strain transfer of polymer optical fiber grating sensors

Xinlong Chang, Ming Li

Proceedings Volume 7381, 73811P (2009) https://doi.org/10.1117/12.834968

KEYWORDS: Sensors, Adhesives, Polymer optical fibers, Interfaces, Optical fibers, Cladding, Fiber Bragg gratings, Erbium, Bromine, Polymeric sensors

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A mechanical model of the polymer optical fiber grating (POFBG) sensor was proposed to determine the strain transfer relationship between the POFBG sensor and the host material. The interface strain transferring mechanism was analyzed among the core of optical fiber, the cladding of optical fiber, the adhesive interlayer and the host material. Because the POFBG sensor and the adhesive interlayer are macromolecular polymer, the model of multilayer interface strain transfer was established based on the linear viscoelastic theory. The strain transfer rate (STR) and the average strain transfer rate (ASTR) were inferred. STR and ASTR of multi-layer mediums between the POFBG sensor and the host material were also analyzed in a similar way. The results show that the measured strain by the POFBG sensor is lower than the actual strain of the host material. STR is lower with steady-state response than transient response. The study provides the theoretical reference of development and engineering application of embedded POFBG sensors for health monitoring.

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