Now showing items 1-20 of 27

    • 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 Fernandez, 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 Fernandez, 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 Fernandez, 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 ...
    • 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 Fernandez, 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 (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 ...
    • 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 ...
    • 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 Fernandez, 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 Fernandez, 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 ...
    • 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 ...
    • 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 ...
    • Effect of the sampling parameters in FOCV-MPPT circuits for fast-varying EH sources 

      Carandell Widmer, Matias; Holmes, Andrew S.; Toma, Daniel; Río Fernandez, Joaquín del; Gasulla Forner, Manuel (Institute of Electrical and Electronics Engineers (IEEE), 2022-10-20)
      Article
      Restricted access - publisher's policy
      The fractional open circuit voltage (FOCV) method is extensively used in low-power energy harvesting (EH) sources to extract maximum power. For fast-varying EH sources a fast sampling rate is required. This work theoretically ...
    • Electromagnetic rolling mass wave energy harvester for oceanic drifter applications 

      Carandell Widmer, Matias; Tichy, Jiri; Smilek, Jan; Toma, Daniel; Gasulla Forner, Manuel; Río Fernandez, Joaquín del; Hadas, Zdenek (Springer, 2022-03-05)
      Article
      Open Access
      Ocean monitoring requirements have fomented the evolution of sensor platforms such as Lagrangian drifters, whose autonomy is a critical factor in the design process. Energy Harvesting (EH) has proven to be a sound option ...
    • Evaluation of SigFox LPWAN technology for autonomous sensors in coastal applications 

      Carandell Widmer, Matias; Toma, Daniel; Río Fernandez, Joaquín del; Ganchev, Kaloyan; Peudennier, Julien (SARTI, 2018)
      Article
      Open Access
      A low-power wide-area network (LPWAN) is a wireless communication network designed to send low bit rates in a long-range communication. SigFox is a LPWAN technology that uses Ultra Narrow Band to communicate packages of ...
    • Evaluation of two MPPT techniques in low-power pendulum-type wave energy converters 

      Carandell Widmer, Matias; Toma, Daniel; Gasulla Forner, Manuel; Río Fernandez, Joaquín del (SARTI, 2021)
      Article
      Open Access
      Lagrangian Drifters are autonomous foating passive devices that provide oceanographic surface data. They are low-cost, low-power and easy-deployable marine instrumentation used in climate research. One of the main challenges ...
    • Experimental validation of a kinetic energy harvester device for oceanic drifter applications 

      Carandell Widmer, Matias; Toma, Daniel; Gasulla Forner, Manuel; Río Fernandez, Joaquín del (2019)
      Conference lecture
      Open Access
      A Kinetic Energy Harvester (KEH) device under design for drifter applications has been tested at real sea conditions in a controlled area. The KEH consists on a pendulum system capable to transform the oscillations of the ...
    • Impact on the wave parameters estimation of a kinetic energy harvester embedded into a drifter 

      Carandell Widmer, Matias; Toma, Daniel; Pinto, José P.; Gasulla Forner, Manuel; Río Fernandez, Joaquín del (Institute of Electrical and Electronics Engineers (IEEE), 2020)
      Conference lecture
      Restricted access - publisher's policy
      The effect of a Kinetic Energy Harvester (KEH) on the wave parameters estimation at a WAVY Ocean (WO) drifter is being studied. An algorithm has been developed to calculate the wave parameters from the Inertial Measuring ...
    • Nonlinear dynamic analysis of pendulum-type Wave Energy Converter for low-power marine monitoring applications 

      Carandell Widmer, Matias; Toma, Daniel; Alevras, Panagiotis; Gasulla Forner, Manuel; Río Fernandez, Joaquín del; Barjau Condomines, Ana (European Wave and Tidal Energy Conference (EWTEC), 2021)
      Conference report
      Open Access
      A model for a double pendulum Wave Energy Converter (WEC) for drifter applications has been developed and validated. The WEC is composed by an articulated arm, a gear train, a flywheel, a one-way bearing and a DC generator. ...