Packaging and testing of fiber Bragg gratings for use as strain sensor for rock specimens

Castro-Caicedo, Alvaro Jesús y Laín Huerta, Ricardo (2013). Packaging and testing of fiber Bragg gratings for use as strain sensor for rock specimens. "PROCEEDINGS OF SPIE, 8th Iberoamerican Optics Meeting and 11th Latin American Meeting on Optics, Lasers, and Applications Manuel Filipe P. C. Martins Costa Editor 22?26 July 2013 Porto, Portugal", v. 8785 ; pp.. ISSN 0277-786X. https://doi.org/10.1117/12.2025678.

Descripción

Título: Packaging and testing of fiber Bragg gratings for use as strain sensor for rock specimens
Autor/es:
  • Castro-Caicedo, Alvaro Jesús
  • Laín Huerta, Ricardo
Tipo de Documento: Artículo
Título de Revista/Publicación: PROCEEDINGS OF SPIE, 8th Iberoamerican Optics Meeting and 11th Latin American Meeting on Optics, Lasers, and Applications Manuel Filipe P. C. Martins Costa Editor 22?26 July 2013 Porto, Portugal
Fecha: Julio 2013
Volumen: 8785
Materias:
Escuela: E.T.S.I. Minas (UPM) [antigua denominación]
Departamento: Explotación de Recursos Minerales y Obras Subterráneas [hasta 2014]
Licencias Creative Commons: Reconocimiento - Sin obra derivada - No comercial

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Resumen

This paper reports a packaging and calibration procedure for surface mounting of fiber Bragg grating (FBG) sensors to measure strain in rocks. The packaging of FBG sensors is performed with glass fiber and polyester resin, and then subjected to tensile loads in order to obtain strength and deformability parameters, necessaries to assess the mechanical performance of the sensor packaging. For a specific package, an optimal curing condition has been found, showing good repeatability and adaptability for non-planar surfaces, such as occurs in rock engineering. The successfully packaged sensors and electrical strain gages were attached to standard rock specimens of gabbro. Longitudinal and transversal strains under compression loads were measured with both techniques, showing that response of FBG sensors is linear and reliable. An analytical model is used to characterize the influences of rock substrate and FBG packaging in strain transmission. As a result, we obtained a sensor packaging for non-planar and complex natural material under acceptable sensitivity suitable for very small strains as occurs in hard rocks.

Más información

ID de Registro: 22354
Identificador DC: http://oa.upm.es/22354/
Identificador OAI: oai:oa.upm.es:22354
Identificador DOI: 10.1117/12.2025678
URL Oficial: https://spie.org/x1848.xml
Depositado por: Memoria Investigacion
Depositado el: 14 Feb 2014 10:32
Ultima Modificación: 21 Abr 2016 14:15
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