Browsing by Keyword "Energy harvesting"
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Item Electrical Response Analysis of a Piezoelectric Energy Harvester Power Source Based on Electromechanical Parameters(2022-11-11) Perez-Alfaro, Irene; Gil-Hernandez, Daniel; Hernando, Eduardo; Quero, Fernando; Bernal, Carlos; Tecnalia Research & Innovation; SMART_MON; MercadoA piezoelectric energy harvester generator is a device capable of transforming environmental mechanical energy into electrical energy. The piezoelectric electromechanical parameters determine the maximum electrical power which is able to be transferred to an electric load. In this research work, an exhaustive study of the electromechanical parameters related to the piezoelectric material is carried out, modeling them as components of an electrical circuit, in order to analyze their influence on the transmitted power. On the other hand, some electrical loads are simulated to determine different matrix scenarios for a model developed by state-space equations in the Laplace transform domain. The results obtained have allowed to know how the piezoelectric material properties and mechanical characteristics influence the electrical power output of the energy harvester generator and the energy transmission behavior for different electric loads. The conclusions show how the different electromechanical parameters are related to each other, and how their combination transforms the mechanical environmental energy into the required electrical energy. The novelty of this research is the presentation of a model capable of obtaining the optimized working point of the harvester, taking into account not only the electric loads and current demands but also the piezoelectric material parameters.Item ENERGY HARVESTING: CAPTANDO ENERGIA PARA EL INTERNET DE LAS COSAS Y LOS SENSORES QUE LAS VIGILAN: Captando energía para el internet de las cosas y los sensores que las vigilan(2015-05-01) Arakistain, Ivan; DIGITALIZACIÓN Y AUTOMATIZACIÓN DE LA CONSTRUCCIÓNLos sistemas de sensorización basados en energy harvesting resultan muy atractivos tanto para usuarios como desarrolladores dada su autonomía energética y una conectividad con nodos que disponen de acceso a internet.En este artículo se analizan algunas de las consideraciones más relevantes para el diseño de sistemas electrónicos energéticamente autosuficientes, basándose en una fuente de captación de energía ambiental. Entre los aspectos analizados están el ultra bajo consumo de energía de los componentes utilizados, el diseño del software así como de la tarjeta de circuito impreso entre otras y se presenta un ejemplo práctico de aplicación.Por último se analiza el modo en el que la tecnología de energy harvesting y la electrónica de ultra bajo consumo pueden impulsar el desarrollo del Internet de las Cosas, mostrándose su relevancia tecnológica para el futuro.Item On Mechanical and Electrical Coupling Determination at Piezoelectric Harvester by Customized Algorithm Modeling and Measurable Properties(2022-04-17) Perez-Alfaro, Irene; Gil-Hernandez, Daniel; Murillo, Nieves; Bernal, Carlos; Tecnalia Research & Innovation; SMART_MONPiezoelectric harvesters use the actuation potential of the piezoelectric material to transform mechanical and vibrational energies into electrical power, scavenging energy from their environment. Few research has been focused on the development and understanding of the piezoelectric harvesters from the material themselves and the real piezoelectric and mechanical properties of the harvester. In the present work, the authors propose a behavior real model based on the experimentally measured electromechanical parameters of a homemade PZT bimorph harvester with the aim to predict its Vrms output. To adjust the harvester behavior, an iterative customized algorithm has been developed in order to adapt the electromechanical coupling coefficient, finding the relationship between the harvester actuator and generator behavior. It has been demonstrated that the harvester adapts its elongation and its piezoelectric coefficients combining the effect of the applied mechanical strain and the electrical behavior as a more realistic behavior due to the electromechanical nature of the material. The complex rms voltage output of the homemade bimorph harvester in the frequency domain has been successfully reproduced by the proposed model. The Behavior Real Model, BRM, developed could become a powerful tool for the design and manufacturing of a piezoelectric harvester based on its customized dimensions, configuration, and the piezoelectric properties of the smart materials.