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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...
Autores principales: | , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
MDPI
2020
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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. |
format | Online Article Text |
id | pubmed-7248692 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2020 |
publisher | MDPI |
record_format | MEDLINE/PubMed |
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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