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Proceedings Paper

Fiber optic-based sensors design to test concrete structures
Author(s): V. Micó; M. L. Lozano; J. J. Esteve-Taboada; J. A. Carrión; T. Molina-Jiménez; S. Simón; E. Pérez; J. M. Lloris; M. Cruz-Yusta; M. J. López-Tendero; C. Silvestre; F. López; D. Barrera-Villar; R. García-Olcina; S. Sales
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Paper Abstract

There are a lot of factors that call into question the integrity, safety and reliability of concrete macrostructures such as bridges, buildings, tunnels and dikes. Examples of such factors are humidity variations, in-excess load supported during years, vibrations and pH variations, which can damage the concrete structure after extended periods. In order to test the real state of such structures, we present the design and development of fiber optic based sensors that permit the measurement of loads and tensions applied to the structure, just as both the humidity and pH of the concrete at the measurement point. The load of the structure can be measured by means of fiber Bragg grating techniques, which involves wavelength multiplexing and optical spectrum analysis, and the humidity and pH measurements are achieved by incorporating different types of hydrogels to the nearness of the fiber Bragg grating. The change in humidity and pH produces volume changes in these hydrogels that modify the spectral response provided by the fiber Bragg grating. Thus, it is possible to place multiple sensors along the macrostructure to visualize the on-line status during its life time.

Paper Details

Date Published: 18 June 2007
PDF: 9 pages
Proc. SPIE 6616, Optical Measurement Systems for Industrial Inspection V, 66163C (18 June 2007); doi: 10.1117/12.726640
Show Author Affiliations
V. Micó, AIDO-Technological Institute of Optics, Colour and Imaging (Spain)
M. L. Lozano, AIDO-Technological Institute of Optics, Colour and Imaging (Spain)
J. J. Esteve-Taboada, AIDO-Technological Institute of Optics, Colour and Imaging (Spain)
J. A. Carrión, AIDO-Technological Institute of Optics, Colour and Imaging (Spain)
T. Molina-Jiménez, AIDO-Technological Institute of Optics, Colour and Imaging (Spain)
S. Simón, AIDO-Technological Institute of Optics, Colour and Imaging (Spain)
E. Pérez, AIDO-Technological Institute of Optics, Colour and Imaging (Spain)
J. M. Lloris, AIDICO-Technological Institute of Construction (Spain)
M. Cruz-Yusta, AIDICO-Technological Institute of Construction (Spain)
M. J. López-Tendero, AIDICO-Technological Institute of Construction (Spain)
C. Silvestre, AIDICO-Technological Institute of Construction (Spain)
F. López, AIDICO-Technological Institute of Construction (Spain)
D. Barrera-Villar, Univ. Politécnica de València (Spain)
R. García-Olcina, Univ. Politécnica de València (Spain)
S. Sales, Univ. Politécnica de València (Spain)


Published in SPIE Proceedings Vol. 6616:
Optical Measurement Systems for Industrial Inspection V
Wolfgang Osten; Christophe Gorecki; Erik L. Novak, Editor(s)

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