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A Self-Adaptive and Self-Sufficient Energy Harvesting System

Self-adaptive vibration energy harvesters convert the kinetic energy from vibration sources into electrical energy and continuously adapt their resonance frequency to the vibration frequency. Only when the two frequencies match can the system harvest energy efficiently. The harvesting of vibration s...

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Detalles Bibliográficos
Autores principales: Mösch, Mario, Fischerauer, Gerhard, Hoffmann, Daniel
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2020
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7248692/
https://www.ncbi.nlm.nih.gov/pubmed/32365593
http://dx.doi.org/10.3390/s20092519
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author Mösch, Mario
Fischerauer, Gerhard
Hoffmann, Daniel
author_facet Mösch, Mario
Fischerauer, Gerhard
Hoffmann, Daniel
author_sort Mösch, Mario
collection PubMed
description Self-adaptive vibration energy harvesters convert the kinetic energy from vibration sources into electrical energy and continuously adapt their resonance frequency to the vibration frequency. Only when the two frequencies match can the system harvest energy efficiently. The harvesting of vibration sources with a time-variant frequency therefore requires self-adaptive vibration harvesting systems without human intervention. This work presents a self-adaptive energy harvesting system that works completely self-sufficiently. Using magnetic forces, the axial load on a bending beam is changed and thus the resonance frequency is set. The system achieves a relative tuning range of 23% at a center frequency of 36.4 Hz. Within this range, the resonance frequency of the harvester can be set continuously and precisely. With a novel optimized method for frequency measurement and with customized electronics, the system only needs 22 µW to monitor the external vibration frequency and is therefore also suitable for environments with low vibration amplitudes. The system was verified on a vibrational test bench and can easily be tailored to a specific vibration source.
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spelling pubmed-72486922020-08-13 A Self-Adaptive and Self-Sufficient Energy Harvesting System Mösch, Mario Fischerauer, Gerhard Hoffmann, Daniel Sensors (Basel) Article Self-adaptive vibration energy harvesters convert the kinetic energy from vibration sources into electrical energy and continuously adapt their resonance frequency to the vibration frequency. Only when the two frequencies match can the system harvest energy efficiently. The harvesting of vibration sources with a time-variant frequency therefore requires self-adaptive vibration harvesting systems without human intervention. This work presents a self-adaptive energy harvesting system that works completely self-sufficiently. Using magnetic forces, the axial load on a bending beam is changed and thus the resonance frequency is set. The system achieves a relative tuning range of 23% at a center frequency of 36.4 Hz. Within this range, the resonance frequency of the harvester can be set continuously and precisely. With a novel optimized method for frequency measurement and with customized electronics, the system only needs 22 µW to monitor the external vibration frequency and is therefore also suitable for environments with low vibration amplitudes. The system was verified on a vibrational test bench and can easily be tailored to a specific vibration source. MDPI 2020-04-29 /pmc/articles/PMC7248692/ /pubmed/32365593 http://dx.doi.org/10.3390/s20092519 Text en © 2020 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Mösch, Mario
Fischerauer, Gerhard
Hoffmann, Daniel
A Self-Adaptive and Self-Sufficient Energy Harvesting System
title A Self-Adaptive and Self-Sufficient Energy Harvesting System
title_full A Self-Adaptive and Self-Sufficient Energy Harvesting System
title_fullStr A Self-Adaptive and Self-Sufficient Energy Harvesting System
title_full_unstemmed A Self-Adaptive and Self-Sufficient Energy Harvesting System
title_short A Self-Adaptive and Self-Sufficient Energy Harvesting System
title_sort self-adaptive and self-sufficient energy harvesting system
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7248692/
https://www.ncbi.nlm.nih.gov/pubmed/32365593
http://dx.doi.org/10.3390/s20092519
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