Fiber Bragg grating system for continuous large-scale monitoring of convergence in Rossio Tunnel

Cristina B. Barbosa; Luis A. Ferreira; Francisco M. Araújo; Luis Gonçalves; Carlos D. Gama; Rui Malva; Angela Silva; Vitor Freitas

doi:10.1117/12.835420

5 October 2009 Fiber Bragg grating system for continuous large-scale monitoring of convergence in Rossio Tunnel

Cristina B. Barbosa, Luis A. Ferreira, Francisco M. Araújo, Luis Gonçalves, Carlos D. Gama, Rui Malva, Angela Silva, Vitor Freitas

Author Affiliations +

Proceedings Volume 7503, 20th International Conference on Optical Fibre Sensors; 75035S (2009) https://doi.org/10.1117/12.835420
Event: 20th International Conference on Optical Fibre Sensors, 2009, Edinburgh, United Kingdom

Abstract

On this paper, the implemented solution for continuous monitoring of Rossio Train Tunnel in Lisbon (Portugal) is described. The monitoring system is a complete solution that comprises measurements of strain and temperature with more than 850 fiber Bragg grating sensors, data acquisition, processing, storage and easy access through a web platform. The applied sensing technology has several advantages such as fiber Bragg sensors being immune to electrical interferences and suited to harsh environments. The used method for convergence monitoring (MEMCOT) makes it possible to determine tunnel convergences based on strain measurements around the tunnel contour. An optoelectronic measurement unit and optical switch are deployed at the entrance of the tunnel and remotely connected to a server that saves and displays information to authorized users in web interface.

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Cristina B. Barbosa, Luis A. Ferreira, Francisco M. Araújo, Luis Gonçalves, Carlos D. Gama, Rui Malva, Angela Silva, and Vitor Freitas "Fiber Bragg grating system for continuous large-scale monitoring of convergence in Rossio Tunnel", Proc. SPIE 7503, 20th International Conference on Optical Fibre Sensors, 75035S (5 October 2009); https://doi.org/10.1117/12.835420

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