Deformation monitoring in prestessing tendons using fibre Bragg gratings encapsulated in metallic packages

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An investigation into the capability of deformation monitoring using fibre Bragg gratings encapsulated in metallic packages is presented in the paper. The proposed approach relies on a grating inscription into a metal coated fibre and brazing the fibre into a metal capillary using induction heating. A metal rod instrumented with encapsulated FBG strain and temperature sensors is placed in an electromechanical tester and stressed up 80 % of its ultimate tensile strength. It is demonstrated through a 60 h experiment that the sensors are capable of real-time deformation monitoring.
Original languageEnglish
Article number9157A6
JournalProceedings of SPIE
Publication statusPublished - 2 Jun 2014
Event23rd International Conference on Optical Fiber Sensors - Santander, Spain
Duration: 3 Jun 20146 Jun 2014


  • deformation monitoring
  • fibre Bragg gratings
  • capillaries
  • temperature sensors
  • metals
  • sensors

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