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In this research, the characteristic constants for  optical  fiber  Bragg  grating  strain  sensors  were  determined  for  their  use  in  metallic  structures.  Three different experiments were performed with the purpose of finding the constant relationship between the optical wavelength reflected by the FBG sensor and the strain or temperature incidents in a specific structure. It was established a comparison between the behavior of optical sensors versus electrical sensors used traditionally. From these experiments it was obtained a constant value for temperature values between 20°C and 70°C; and for strain from zero up to 1800 μe. All measurements were taken in ‘in-situ’ conditions for tests of metallic structures. The results show a higher speed of response for  the  optical  sensors  when  compared  with  electrical  resistance  strain  gauges  or  thermocouples. Also, fiber Bragg grating sensors show a larger operating range in tensile tests.

Validación de sensores basados en redes de difracción de bragg (fbgs) para deformación y temperatura