61975 20231108202258.0 doi 10.3390/s17081794 sideral 100779 ART-2017-100779 eng Antolín, Diego (orcid)0000-0003-4404-776X A compact energy harvesting system for outdoor wireless sensor nodes based on a low-cost in situ photovoltaic panel characterization-modelling unit 2017 Access copy available to the general public Unrestricted This paper presents a low-cost high-efficiency solar energy harvesting system to power outdoor wireless sensor nodes. It is based on a Voltage Open Circuit (VOC) algorithm that estimates the open-circuit voltage by means of a multilayer perceptron neural network model trained using local experimental characterization data, which are acquired through a novel low cost characterization system incorporated into the deployed node. Both units—characterization and modelling—are controlled by the same low-cost microcontroller, providing a complete solution which can be understood as a virtual pilot cell, with identical characteristics to those of the specific small solar cell installed on the sensor node, that besides allows an easy adaptation to changes in the actual environmental conditions, panel aging, etc. Experimental comparison to a classical pilot panel based VOC algorithm show better efficiency under the same tested conditions. info:eu-repo/grantAgreement/ES/MINECO-FEDER/TEC2015-65750-R info:eu-repo/grantAgreement/ES/UZ/JIUZ-2016-TEC-06 info:eu-repo/semantics/openAccess by http://creativecommons.org/licenses/by/3.0/es/ 2.475 2017 CHEMISTRY, ANALYTICAL 30 / 78 = 0.385 2017 Q2 T2 INSTRUMENTS & INSTRUMENTATION 16 / 61 = 0.262 2017 Q2 T1 ELECTROCHEMISTRY 15 / 28 = 0.536 2017 Q3 T2 0.584 2017 Analytical Chemistry 2017 Q2 Atomic and Molecular Physics, and Optics 2017 Q2 Medicine (miscellaneous) 2017 Q2 Electrical and Electronic Engineering 2017 Q2 Instrumentation 2017 Q2 Biochemistry 2017 Q3 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Medrano, Nicolás Universidad de Zaragoza (orcid)0000-0002-5380-3013 Calvo, Belén Universidad de Zaragoza (orcid)0000-0003-2361-1077 Martínez, Pedro A. Universidad de Zaragoza (orcid)0000-0001-6642-3792 5008 250 Universidad de Zaragoza Dpto. Ingeniería Electrón.Com. Área Electrónica 17, 8 (2017), [18 pp] Sensors Sensors 1424-8220 10789540 http://zaguan.unizar.es/record/61975/files/texto_completo.pdf Versión publicada 108090 http://zaguan.unizar.es/record/61975/files/texto_completo.jpg?subformat=icon icon Versión publicada oai:zaguan.unizar.es:61975 articulos driver 2023-11-08-20:13:43 ARTICLE