Exploració per tema "Detectors de fibra òptica"

Ara es mostren els items 21-40 de 52

    • Fiber bragg grating sensors for underwater vibration measurement: potential hydropower applications 

      Torre Rodríguez, Óscar de la; Floris, Ingazio; Sales, Salvador; Escaler Puigoriol, Francesc Xavier (Multidisciplinary Digital Publishing Institute (MDPI), 2021-06-22)
      Article
      Accés obert
      The present paper assesses the performance and characteristics of fiber Bragg grating sensors, with a special interest in their applications in hydraulic machinery and systems. The hydropower industry is turning to this ...

    • Fiber optics for load testing 

      Casas Rius, Joan Ramon; Barrias, Antonio Jose de Sousa; Rodríguez, Gerardo; Villalba Herrero, Sergi (CRC Press, 2019)
      Capítol de llibre
      Accés restringit per política de l'editorial
      This chapter presents the application of fiber optic sensor technology in the monitoring of a load test. First, the description of the fiber optic technology is described with main emphasis in the case of distributed optical ...

    • FPGA-based digital signal processing for an optical interferometer thermometer 

      Manuel Pasoot, Alicia (Universitat Politècnica de Catalunya, 2023-07-04)
      Treball Final de Grau
      Accés obert
      Realitzat a/amb:   Institut d'Estudis Espacials de Catalunya / ESA European Astronaut Centre (EAC)
      This thesis takes part in the LIRA project. This project is an ESA's contract, with the aim to implement a fiber optic temperature sensor which fulfils the requirements of the LISA project, which is based in the detection ...

    • GPON unbundling for multioperator access 

      Carmona, David; Prat Gomà, Josep Joan; Tomkos, Ioannis; PILAR, SANCHEZ MARCO (Institute of Electrical and Electronics Engineers (IEEE), 2010)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      This work aims at considering different unbundling options for the Local Loop Unbundling (LLU) in order to provide multi-operator access and consider the economical impact for the FTTH NGA entrants to deploy such alternatives. ...

    • Health monitoring of real structures by distributed optical fiber 

      Barrias, Antonio Jose de Sousa; Casas Rius, Joan Ramon; Villalba Herrero, Sergi; Rodríguez, Gerardo (2016)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      Two different existing structures monitored with distributed optical fiber sensors, are described in this paper. The principal Structural Health Monitoring (SHM) results of a valuable hospital rehabilitation and the ...

    • Identificación estructural en elementos a flexión mediante sensores de fibra óptica distribuida 

      Espinet Barquets, Alexandre (Universitat Politècnica de Catalunya, 2021-06-21)
      Projecte Final de Màster Oficial
      Accés obert
      El present treball posa de manifest que la monitorització amb fibra òptica distribuïda permet identificar els canvis que es produeixen en determinats paràmetres resistents i deformacionals en elements a flexió. Això es ...

    • Investigation of reflective optical network units for bidirectional passive optical access networks 

      Arellano Pinilla, Cristina (Universitat Politècnica de Catalunya, 2007-07-25)
      Tesi
      Accés obert
      Esta investigación está conducida a la resolución del problema de encontrar soluciones rentables para el despliegue de redes de fibra hasta el hogar (Fibre to the Home - FTTH). En una red de FTTH, el equipo transmisor-receptor ...

    • Long-distance and continuous horizontal displacement sensor of deep excavation based on distributed optical fiber sensing 

      Li, Shengtao; Sun, Yangyang; Casas Rius, Joan Ramon; Chen, Xudong; Wang, Hao; Zeng, Jie; Ma, Linjian (2023-10)
      Article
      Accés obert
      A long-distance displacement and continuous sensor based on distributed optical fiber sensing (DOFS) with the ability to measure the horizontal displacement of deep excavation was investigated herein. The feasibility and ...

    • Long-term reliability assessment of OBR based DOFS on reinforced concrete elements 

      Barrias, Antonio Jose de Sousa; Casas Rius, Joan Ramon; Villalba Herrero, Sergi (International Association for Structural Control and Monitoring (IASCM), 2018)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      The authors conducted a laboratory experiment where two reinforced concrete beams were instrumented with a Distributed Optical Fiber Sensors that were adhered to allow the measuring of strain on four different longitudinal ...

    • Microcantilever Displacement Measurement Using a Mechanically Modulated Optical Feedback Interferometer 

      Azcona Guerrero, Francisco Javier; Jha, Ajit; Yáñez Alvarado, Carlos René; Atashkhooei, Reza; Royo Royo, Santiago (2016-06-29)
      Article
      Accés obert
      Microcantilever motion detection is a useful tool for the characterization of the physical, chemical and biological properties of materials. In the past, different approaches have been proposed and tested to enhance the ...

    • Monitoring of flexural and shear crack pattern in concrete structures by distributed optical fiber 

      Rodríguez, Gerardo; Casas Rius, Joan Ramon; Villalba Herrero, Sergi (International Society for Structural Health Monitoring of Intelligent Infrastructure (ISHMII), 2015)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      In the present paper, two methodologies to obtain flexural and shear crack pattern in concrete elements using distributed optical fiber are proposed. The first has been validated through experimental results of tests carried ...

    • Monitoring of shear cracking in partially prestressed concrete beams by distributed optical fiber sensors 

      Rodríguez, Gerardo; Casas Rius, Joan Ramon; Villalba Herrero, Sergi; Barrias, Antonio Jose de Sousa (CRC Press Taylor, 2016)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      In the present paper, a novel technique is used to monitor shear crack patterns in Partially Prestressed Concrete (PPC) beams. The proposed technique is based on experimental data obtained in two PPC beams tested in ...

    • Monitorización continua-gestión estructural: monitorización del viaducto de la carretera BP-1413 (Cerdanyola del Vallés) 

      Villalba Herrero, Vicenç; Casas Rius, Joan Ramon (Asociacion Científica del Hormigón Estructural (ACHE), 2011)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      Se presenta la aplicación en un viaducto de un sistema de monitorización continúo (en el espacio y tiempo) de fibra óptica (OBR) que suministra datos a tiempo real para poder controlar y conocer el estado/comportamiento ...

    • Monitorización estructural con sensores de fibra óptica distribuida: aplicaciones en estructuras de hormigón 

      Rodríguez Gutiérrez, Gerardo; Casas Rius, Joan Ramon (2019)
      Llibre
      Accés restringit per política de l'editorial
      Se presenta el uso de un reflectómetro óptico de retrodispersión denominado sistema OBR (Optical Backscattered Reflectometer por sus siglas en inglés), como una herramienta de monitorización de la salud estructural (MSE) ...

    • Monitorización y salud estructural: aplicación de la fibra óptica distribuida (OBR) en estructuras de hormigón 

      Villalba Herrero, Sergi; Casas Rius, Joan Ramon (Asociacion Científica del Hormigón Estructural (ACHE), 2011)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      El uso de la fibra óptica Optical Backscatter Reflectometer (OBR), es una tecnología de sensores de medición prometedora para la monitorización estructural (SHM) “Structural Health Monitoring”, ya que ofrece la posibilidad ...

    • On the bonding performance of Distributed Optical Fiber Sensors (DOFS) in structural concrete 

      Barrias, Antonio; Casas Rius, Joan Ramon; Villalba Herrero, Sergi (CRC Press, 2018)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      Distributed optical fiber sensors (DOFS) is one of the most promising and exciting technolo-gies under research to be applied in civil engineering infrastructures structural health monitoring (SHM). There-fore, in this ...

    • Optimal sensor placement methods and criteria in dynamic testing: comparison and implementation on a pedestrian bridge 

      Lizana Vilaseca, Marc; Casas Rius, Joan Ramon (2021)
      Text en actes de congrés
      Accés obert
      Structural health monitoring (SHM) is being widely used for the safety assessment and management of existing bridges and structures. One of the objectives related to SHM is to maximize the information gained from the ...

    • Performance analysis of distributed optical fiber bonding adhesives to concrete 

      Barrias, Antonio; Casas Rius, Joan Ramon; Villalba Herrero, Sergi (2018)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      In this paper, the authors conducted an experiment where a reinforced concrete beam was in-strumented with a single DOFS performing four equal segments externally bonded to the bottom surface of the element. Each segment ...

    • Performance analysis of Distributed Optical Fiber Sensors on reinforced concrete elements under fatigue testing 

      Barrias, Antonio; Casas Rius, Joan Ramon; Villalba Herrero, Sergi (International Federation for Structural Concrete (fib), 2018)
      Text en actes de congrés
      Accés obert
      Optical fiber sensors (OFS) have become increasingly popular on civil engineering structural health monitoring (SHM) applications in the last two decades. This is due to several advantages when compared to the more ...

    • Performance of Distributed Optical Fiber Sensors (DOFS) and Digital Image Correlation (DIC) in the monitoring of RC structures 

      Bado, Mattia Francesco; Kaklauskas, Gintaris; Casas Rius, Joan Ramon (Institute of Physics (IOP), 2019)
      Comunicació de congrés
      Accés obert
      Distributed Optical Fiber Sensors (DOFS) are strain measuring tools whose potential had been discovered in the latest years only, in particular related to the civil engineering field. A unique utility lies in the possibility ...