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Proceedings Paper

Fiber Bragg grating system for continuous large-scale monitoring of convergence in Rossio Tunnel
Author(s): Cristina B. Barbosa; Luis A. Ferreira; Francisco M. Araújo; Luis Gonçalves; Carlos D. Gama; Rui Malva; Angela Silva; Vitor Freitas
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Paper 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.

Paper Details

Date Published: 5 October 2009
PDF: 4 pages
Proc. SPIE 7503, 20th International Conference on Optical Fibre Sensors, 75035S (5 October 2009); doi: 10.1117/12.835420
Show Author Affiliations
Cristina B. Barbosa, FiberSensing S.A. (Portugal)
Luis A. Ferreira, FiberSensing S.A. (Portugal)
INESC Porto (Portugal)
Francisco M. Araújo, FiberSensing S.A. (Portugal)
INESC Porto (Portugal)
Luis Gonçalves, Empresa Portuguesa de Obras Subterrâneas (Portugal)
Carlos D. Gama, Instituto Superior Técnico (Portugal)
Rui Malva, Rede Ferroviária Nacional EPE (Portugal)
Angela Silva, Rede Ferroviária Nacional EPE (Portugal)
Vitor Freitas, Rede Ferroviária Nacional EPE (Portugal)

Published in SPIE Proceedings Vol. 7503:
20th International Conference on Optical Fibre Sensors
Julian D. C. Jones, Editor(s)

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