Linear Segmented Arc-Shaped Piezoelectric Branch Beam Energy Harvester for Ultra-Low Frequency Vibrations

Piezoelectric energy harvesting systems have been drawing the attention of the research community over recent years due to their potential for recharging/replacing batteries embedded in low-power-consuming smart electronic devices and wireless sensor networks. However, conventional linear piezoelect...

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Bibliographic Details
Published in:Sensors (Basel, Switzerland) Switzerland), 2023-06, Vol.23 (11), p.5257
Main Authors: Piyarathna, Iresha Erangani, Thabet, Ahmed Mostafa, Ucgul, Mustafa, Lemckert, Charles, Lim, Yee Yan, Tang, Zi Sheng
Format: Article
Language:English
Subjects:
Analysis
arc-shaped branch beam harvester
Bandwidths
Cantilever beams
curved beam
Curved beams
Design
Electric power production
Energy harvesting
Energy resources
Frequency ranges
Frequency spectrum
Human motion
Internet of Things
Knee
Low voltage
macro-fibre composite (MFC)
Medical equipment
piezoelectric energy harvesting
Power management
Resonant frequencies
Sensors
Wireless sensor networks
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Summary:Piezoelectric energy harvesting systems have been drawing the attention of the research community over recent years due to their potential for recharging/replacing batteries embedded in low-power-consuming smart electronic devices and wireless sensor networks. However, conventional linear piezoelectric energy harvesters (PEH) are often not a viable solution in such advanced practices, as they suffer from a narrow operating bandwidth, having a single resonance peak present in the frequency spectrum and very low voltage generation, which limits their ability to function as a standalone energy harvester. Generally, the most common PEH is the conventional cantilever beam harvester (CBH) attached with a piezoelectric patch and a proof mass. This study investigated a novel multimode harvester design named the arc-shaped branch beam harvester (ASBBH), which combined the concepts of the curved beam and branch beam to improve the energy-harvesting capability of PEH in ultra-low-frequency applications, in particular, human motion. The key objectives of the study were to broaden the operating bandwidth and enhance the harvester's effectiveness in terms of voltage and power generation. The ASBBH was first studied using the finite element method (FEM) to understand the operating bandwidth of the harvester. Then, the ASBBH was experimentally assessed using a mechanical shaker and real-life human motion as excitation sources. It was found that ASBBH achieved six natural frequencies within the ultra-low frequency range (
ISSN:1424-8220
1424-8220
DOI:10.3390/s23115257