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    • A data management e-infrastructure for the OBSEA cabled observatory 

      Martínez Padró, Enoc; Garcia Benadí, Albert; Toma, Daniel; Carandell Widmer, Matias; Nogueras Cervera, Marc; Río Fernández, Joaquín del (2023)
      Article
      Open Access
      Underwater cabled observatories are a key assets to monitor the oceans, providing high-resolution multi-parametric data from a wide variety of sensor systems. Their outstanding observational capabilities lead to significant ...

    • A new coastal crawler prototype to expand the ecological monitoring radius of OBSEA cabled observatory 

      Falahzadehabarghouee, Ahmad; Toma, Daniel; Francescangeli, Marco; Chatzievangelou, Damianos; Nogueras Cervera, Marc; Martínez Padró, Enoc; Carandell Widmer, Matias; Tangerlini, Michael; Thomsen, Laurenz; Picardi, Giacomo; Le Bris, Marie; Aguzzi, Jacopo; Río Fernández, Joaquín del (Multidisciplinary Digital Publishing Institute (MDPI), 2023-04-18)
      Article
      Open Access
      The use of marine cabled video observatories with multiparametric environmental data collection capability is becoming relevant for ecological monitoring strategies. Their ecosystem surveying can be enforced in real time, ...

    • A new nonlinear compliant mechanism for harvesting energy from ocean waves 

      Liang, Haitong; Carandell Widmer, Matias; Olszewski, Oskar Z.; Hao, Guangbo (Institute of Electrical and Electronics Engineers (IEEE), 2022)
      Conference lecture
      Open Access
      Traditonal linear oscillators, such as cantilevers or pendulums, are only sensitive to specific resonant frequencies. They have then very narrow frequency bandwidths when harvesting energy from ocean waves. In order to ...

    • A nonlinear kinetic energy harvester for light suface ocean drifters 

      Toma, Daniel; Carandell Widmer, Matias; Carbonell Ventura, Montserrat; Vals, Lluis; Río Fernández, Joaquín del (SARTI, 2018)
      Article
      Open Access
      A nonlinear kinetic energy harvester for ocean drifter devices is presented. The design contains a gyroscopic wave energy harvesting system, capable of generating power from the wave-induced translational and rotational ...

    • An integrated biogeochemistry observation system at Besòs estuary 

      Toma, Daniel; Artero Delgado, Carola; Martínez Padró, Enoc; Cadena Muñoz, Francisco Javier; Nogueras Cervera, Marc; Carandell Widmer, Matias; Río Fernández, Joaquín del; Gomáriz Castro, Spartacus (2021)
      Conference report
      Open Access
      Estuaries are coastal indentations where freshwater mixes with seawater (Pritchard 1967), and are found everywhere in the world. Moreover, the estuarine ecosystems are usually characterized by high biological productivity ...

    • An integrated biogeochemistry observation system at Besòs estuary 

      Toma, Daniel; Artero Delgado, Carola; Martínez Padró, Enoc; Cadena Muñoz, Francisco Javier; Nogueras Cervera, Marc; Carandell Widmer, Matias; Río Fernández, Joaquín del; Gomáriz Castro, Spartacus (SARTI, 2021)
      Article
      Open Access
      Estuaries are coastal indentations where freshwater mixes with seawater (Pritchard 1967), and are found everywhere in the world. Moreover, the estuarine ecosystems are usually characterized by high biological productivity ...

    • An open-source control architecture for teleoperated underwater legged robots 

      Picardi, Giacomo; Carandell Widmer, Matias; Nogueras Cervera, Marc; Toma, Daniel; Río Fernández, Joaquín del; Aguzzi, Jacopo (SARTI, 2024)
      Article
      Open Access
      Legged robots have achieved unprecedented performance in the terrestrial environment. The capability of legged agents to harness the contacts with the ground for locomotion, adapt their gait to negotiate regular terrains, ...

    • ANERIS project: OBSEA's contribution to marine biodiversity monitoring 

      Nogueras Cervera, Marc; Carandell Widmer, Matias; Toma, Daniel; Picheral, Marc; Geselschap, Catina; Stuart, Dominic; Río Fernández, Joaquín del (SARTI, 2024)
      Article
      Open Access
      This article outlines the contribution of the Expandable Seafloor Observatory (OBSEA) from the Universitat Politècnica de Catalunya (UPC) to the ANERIS project coordinated by the Consejo Superior de Investigaciones Científicas ...

    • Calibrating the movement of an underwater crawler using pulse width modulation (PWM) 

      Falahzadehabarghouee, Ahmad; Toma, Daniel; Le Bris, Marie; Martínez Padró, Enoc; Carandell Widmer, Matias; Nogueras Cervera, Marc; Aguzzi, Jacopo; Río Fernández, Joaquín del (SARTI, 2023)
      Article
      Open Access

    • Consumption evaluation of a relaxation oscillator as a control sampling circuit for fast-tracking FOCV-MPPT circuits in wave energy converters 

      Carandell Widmer, Matias; Toma, Daniel; Holmes, Andrew S.; Martínez Padró, Enoc; Gasulla Forner, Manuel; Río Fernández, Joaquín del (SARTI, 2023)
      Article
      Open Access

    • Contributions to the design of energy harvesting systems for autonomous sensors in low power marine applications 

      Carandell Widmer, Matias (Universitat Politècnica de Catalunya, 2022-04-28)
      Doctoral thesis
      Open Access
      Oceanographic sensor platforms provide biological and meteorological data to help understand changes in marine environment and help to preserve it. Lagrangian drifters are autonomous passive floating platforms used in ...

    • Contributions to the pendulum-type wave energy converter system for oceanic drifter applications 

      Carandell Widmer, Matias; Toma, Daniel; Gasulla Forner, Manuel; Río Fernández, Joaquín del (2021)
      Conference report
      Open Access
      Lagrangian Drifters are autonomous floating passive devices that provide oceanographic surface data. They are low-cost, versatile and easy-deployable marine instrumentation used in climate research. One of the main challenges ...

    • Convertidor puente H-NPC con devanados abiertos como inversor central en aplicaciones fotovoltaicas trifásicas de gran escala 

      Carandell Widmer, Matias (Universitat Politècnica de Catalunya / Universidad Técnica Federico Santa María, 2015)
      Master thesis
      Open Access
      Covenantee:   Universidad Técnica Federico Santa María

    • Data comparison between three acoustic doppler current profilers deployed in OBSEA platform in north-western Mediterranean 

      Carandell Widmer, Matias; Nogueras Cervera, Marc; Chumbinho, Rogério; Molina, Cristiobal (2016)
      Conference report
      Open Access
      Three different Acoustic Doppler Current Profilers (ADCP) have been deployed in OBSEA platform, a 20 meters depth underwater observatory cabled with a 4 km mixt cable to Vilanova i la Geltru’s coast. Two months of continuous ...

    • Data comparison between three acoustic doppler current profilers deployed in OBSEA platform in North-Western Mediterranean 

      Carandell Widmer, Matias; Nogueras Cervera, Marc (SARTI, 2016)
      Conference lecture
      Open Access
      Three different Acoustic Doppler Current Profilers (ADCP) have been deployed in OBSEA platform, a 20 meters depth underwater observatory cabled with a 4 km mixt cable to Vilanova i la Geltru’s coast. Two months of ...

    • Design and development of a kinetic energy harvester device for oceanic drifter applications 

      Carandell Widmer, Matias; Toma, Daniel; Carbonell Ventura, Montserrat; Gasulla Forner, Manuel; Río Fernández, Joaquín del (Institute of Electrical and Electronics Engineers (IEEE), 2019)
      Conference report
      Open Access
      A novel electronic energy harvester (EH) has been developed for oceanic undrogued drifter applications. First, spherical body motion simulation has been performed at sea environment in Orcaflex. Results help to understand ...

    • Design and testing of a kinetic energy harvester embedded into an oceanic drifter 

      Carandell Widmer, Matias; Toma, Daniel; Carbonell Ventura, Montserrat; Río Fernández, Joaquín del; Gasulla Forner, Manuel (2020-02-28)
      Article
      Open Access
      A novel Kinetic Energy Harvester (KEH) has been developed for powering oceanic undrogued drifters. It consists on a double pendulum system capable of transforming the wave oscillations into rotation on a flywheel. This ...

    • Detect and follow a custom object, using OBSEA underwater crawler 

      Falahzadehabarghouee, Ahmad; Toma, Daniel; Nogueras Cervera, Marc; Martínez Padró, Enoc; Carandell Widmer, Matias; Aguzzi, Jacopo; Río Fernández, Joaquín del (SARTI, 2024)
      Article
      Open Access
      The strategic advancement of monitoring protocols relies on cabled marine observatories for obtaining real-time multiparametric biological and environmental data. The integration of docked mobile platforms, such as underwater ...

    • Dynamic analysis of a pendulum-type wave energy converter for oceanic drifters by means of a 4 DoF model 

      Ortiz de Haro, Joan; Carandell Widmer, Matias; Barjau Condomines, Ana (SARTI, 2021)
      Article
      Open Access
      Drifters are Lagrangian instrumentation widely used in oceanography and climate research. They are designed to obtain data from oceans by passively following the water currents. They provide information about the ocean ...

    • Dynamic analysis of a pendulum-type wave energy converter for oceanic drifters by means of a 4 DoF model 

      Ortiz de Haro, Joan; Carandell Widmer, Matias; Barjau Condomines, Ana (2021)
      Conference report
      Open Access
      A 4 DoF analytical model for a drifter with an embedded simple pendulum with energy harvesting purposes have been developed. The Lagrange equations have been used to obtain the motion model while Morrison and Airy’s theorems ...