Fiber sensors for the high-speed railway environment

Specialty Optical Fibers 2014, Barcelona, Spain, 27–31 July 2014We review some recent work on fiber-optic sensors for the high-speed railway environment. In particular, we show convenient fiber-optic solutions for rail and wheel monitoring, perimeter security and catenary protection in changeover section

Real time monitoring of railway traffic using fiber bragg grating sensors

8 páginas, 14 figuras, 2 tablas.-- Comunicación oral presntada a la Joint Rail Conference celebrada en Urbana (USA) del 27 al 29 de Abril de 2010.In this work we present field tests concerning the application of Fiber Bragg Grating (FBG) sensors for the monitoring of railway traffic. The test campaigns are performed on the Spanish high speed line Madrid–Barcelona, with different types of trains (S-102 TALGO–BOMBARDIER, S- 103 SIEMENS-VELARO and S-120 CAF). We located the FBG sensors in the rail track at 70 km from Madrid in the country side, where the trains primarily are tested during commercial operation with maximum speeds between 250-300 km/h. The FBG sensor interrogation system used allows the simultaneous monitoring of four FBG sensors at 8000 samples/s. The different position of the FBG sensors in relation with the rail can be used with different purposes such as train identification, axle counting, speed and acceleration detection, wheel imperfections monitoring and dynamic load calculation.This study has been supported by Ministerio de Fomento through project MIFFO (reference FOM/3774/2007 under the Strategic Infrastructure and Transport Program, PEIT). We also acknowledge financial support from the Ministerio de Educación y Ciencia through projects TEC2006-09990-C02- 01 and TEC2006-09990-C02-02, and the support from the Comunidad Autónoma de Madrid through project FACTOTEM2_CM (S2009/ESP-1781).Peer reviewe

Wheel flat detection in high-speed railway systems using fiber Bragg gratings

21st International Conference on Optical Fiber Sensors, Ottawa, Canada, May 15, 2011Wheel “flats” are a major source of problems in railway systems since they cause strong wear both in the infrastructure\ud and in the train vehicles. In this work we present field tests concerning the application of Fiber Bragg Grating (FBG)\ud sensors for the detection of out-of-roundness in high-speed train wheels. Wheel flats are shown to cause high-energy\ud impacts on the rails which can be monitored using FBGs located in the rails. The results point out a great potential of this\ud technology for the development of wheel flat detection systems

Wheel flat detection in high-speed railway systems using fiber bragg gratings

Wheel flats are a major source of problems in railway systems since they cause strong wear both in the infrastructure and in the train vehicles. In this paper, we present field tests concerning the application of Fiber Bragg Grating (FBG) sensors for the detection of out-of-roundness in high-speed train wheels. Wheel flats are shown to cause high-energy impacts on the rails that can be monitored using FBGs located in the rails. The results point out a great potential of this technology for the development of reliable wheel flat detection systems. © 2013 IEEE.Peer Reviewe

Fiber sensors for the high-speed railway environment

Specialty Optical Fibers 2014, Barcelona, Spain, 27–31 July 2014We review some recent work on fiber-optic sensors for the high-speed railway environment. In particular, we show convenient fiber-optic solutions for rail and wheel monitoring, perimeter security and catenary protection in changeover section

Real-Time Monitoring of Railway Traffic Using Fiber Bragg Grating Sensors

In this work, we present field tests concerning the application of fiber Bragg grating (FBG) sensors for the monitoring of railway traffic. The test campaigns are performed on the Spanish high-speed line Madrid-Barcelona, with different types of trains (S-102 TALGO-BOMBARDIER, S-103 SIEMENS-VELARO, and S-120 CAF). We located the FBG sensors in the rail track at 70 km from Madrid in the country side, where the trains primarily are tested during commercial operation with maximum speeds between 250-300 km/h. The FBG sensor interrogation system used allows the simultaneous monitoring of four FBG sensors at 8000 samples/s. The different position of the FBG sensors in relation with the rail can be used for different purposes such as train identification, axle counting, speed and acceleration detection, wheel imperfections monitoring, and dynamic load calculation.This work was supported in part by Ministerio de Fomento through project MIFFO (reference FOM/3774/2007 under the Strategic Infrastructure and Transport Program, PEIT). We also acknowledge financial support from the Ministerio de Educación y Ciencia through projects TEC2006- 09990-C02-01 and TEC2006-09990-C02-02, and the support from the Comunidad Autónoma de Madrid through project FACTOTEM2_CM (S2009/ESP- 1781).Peer Reviewe

Individualismo y bien común: los límites de las instituciones

La sociedad occidental ha sido, posiblemente, la que ha legado más instituciones a la cultura humana. Ello como parte de su proceso de consolidación como la forma predominante y “dominante” de estructuración de toda sociedad, impuesta a lo largo y ancho del mundo, mediante los procesos de colonización y de neocolonización actual. De ese modo, las otras formas de organización social, política y económica -surgidas en otras culturas y en sus instituciones propias-, han ido siendo reducidas a supervivencias del pasado, retazos exóticos o excentricidades históricas. Adoptando este marco de análisis, el tema es abordado por Fernando Rovetta , quien apoya la concepción de bien común y de personalismo comunicativo por sobre la idea hegemónica del individualismo posesivo. Por su parte, el artículo de Andrés Piqueras nos invita a una reflexión en torno a las formas que adopta el capitalismo en esta fase post-fordista, y a la manera en que las sociedades latinoamericanas podrían resistir mejor este fenómeno de individuación creciente