Enhanced acoustoelectric coupling in acoustic energy harvester using dual helmholtz resonators

2013 ◽  
Vol 60 (10) ◽  
pp. 2121-2128 ◽  
Author(s):  
Xiao Peng ◽  
Yumei Wen ◽  
Ping Li ◽  
Aichao Yang ◽  
Xiaoling Bai
Keyword(s):  
Energy Harvester ◽  
Acoustic Energy ◽  
Helmholtz Resonators

scholarly journals Enhanced Quarter Spherical Acoustic Energy Harvester Based on Dual Helmholtz Resonators

Sensors ◽  
2020 ◽  
Vol 20 (24) ◽  
pp. 7275
Author(s):  
Xincun Ji ◽  
Lei Yang ◽  
Zhicheng Xue ◽  
Licheng Deng ◽  
Debo Wang
Keyword(s):  
Output Power ◽  
Frequency Band ◽  
Output Voltage ◽  
Energy Harvester ◽  
Theoretical Models ◽  
Energy Conversion Efficiency ◽  
Acoustic Energy ◽  
Cardiac Pacemakers ◽  
Implantable Medical Devices ◽  
Helmholtz Resonators

An enhanced quarter-spherical acoustic energy harvester (AEH) with dual Helmholtz resonators was designed in this work. Compared with the previous research, this AEH can harvest multi-directional acoustic energy, has a widened resonance frequency band, and has an improved energy conversion efficiency. When the length of resonator’s neck is changed, the acoustic resonant frequency of the two resonators is different. The theoretical models of output voltage and output power were studied, and the relationship of output performance with frequency was obtained. The results showed that this AEH can operate efficiently in a frequency band of about 470 Hz. Its output voltage was found to be about 28 mV, and its output power was found to be about 0.05 μW. The power density of this AEH was found to be about 12.7 µW/cm2. Therefore, this AEH could be widely used in implantable medical devices such as implantable cardiac pacemakers, cochlear implants, and retinal prosthesis.

An omnidirectional acoustic energy harvester based on six Helmholtz resonators

2021 ◽  
pp. 1-13
Author(s):  
Licheng Deng ◽  
Lei Yang ◽  
Zhicheng Xue ◽  
Qingying Ren ◽  
Debo Wang
Keyword(s):  
Conversion Efficiency ◽  
Energy Harvester ◽  
Maximum Output Power ◽  
Load Resistance ◽  
Energy Conversion Efficiency ◽  
Acoustic Energy ◽  
Maximum Output ◽  
Helmholtz Resonators ◽  
Wide Range ◽  
Relationship Of

An omnidirectional acoustic energy harvester (AEH) based on six Helmholtz resonators is proposed in this work. Compared with the previous structure, the insufficiency of the directionality and conversion efficiency of energy collection can be effectively improved due to the coupling of six resonators. Based on the distributed parameter model, the relationship of the electrical output, the input frequency with the structure size is obtained. The simulation results show that the maximum output voltage is 70.95 mV at the resonant frequency of 35 kHz. When the external load resistance is 14 kΩ, the maximum output power is 0.45 μW. Moreover, the energy conversion efficiency of this omnidirectional AEH can reach 23%, which is improved greatly compared with the traditional structure. Therefore, this AEH will have a wide range of application prospects in medical implantation equipment and other fields.

An efficient low-frequency acoustic energy harvester

2017 ◽  
Vol 264 ◽  
pp. 84-89 ◽  
Author(s):  
Ming Yuan ◽  
Ziping Cao ◽  
Jun Luo ◽  
Jinya Zhang ◽  
Cheng Chang
Keyword(s):  
Energy Harvester ◽  
Low Frequency ◽  
Acoustic Energy

scholarly journals The effect of type of sound damper material in the Helmholtz resonator to the output power spectrum of acoustic energy Harvester

2019 ◽  
Vol 3 (2) ◽  
pp. 50
Author(s):  
Hedwigis Harindra ◽  
Agung Bambang Setio Utomo ◽  
Ikhsan Setiawan
Keyword(s):  
Energy Harvesting ◽  
Power Spectrum ◽  
Electric Power ◽  
Energy Harvester ◽  
Helmholtz Resonator ◽  
Acoustic Energy ◽  
Acoustic Energy Harvesting ◽  
Wasted Energy ◽  
Second Peak ◽  
Output Electric Power

<span>Acoustic energy harvesting is one o</span><span lang="EN-US">f</span><span> many ways to harness </span><span lang="EN-US">acoustic </span><span>noises as wasted energy into use</span><span lang="EN-US">f</span><span>ul </span><span lang="EN-US">electical </span><span>energy using an acoustic </span><span>energy harvester. </span><span>Acoustic </span><span>energy harvester t</span><span lang="EN-US">h</span><span>at tested by Dimastya (2018) </span><span lang="EN-US">which is consisted of loudspeake</span><span>r </span><span lang="EN-US">and Helmholtz resonator, </span><span>produced two-peak spectrum. It is </span><span lang="EN-US">suspected</span><span> that the </span><span lang="EN-US">f</span><span>irst peak </span><span lang="EN-US">is due t</span><span>o </span><span lang="EN-US">Helmholtz</span><span> resonator resonance and the second peak </span><span lang="EN-US">comes</span><span lang="EN-US">from the resonance of the conversion </span><span>loudspeaker. </span><span lang="EN-US">This research is to experimentally confirm the guess of the origin of the first peak. The experiments are performed by adding silencer materials on the resonator inner wall which are expected to be able to reduce the height of first peak and to know </span><span>how </span><span lang="EN-US">they</span><span> a</span><span lang="EN-US">ff</span><span>ect t</span><span>he output electric power spectrum o</span><span lang="EN-US">f</span><span> t</span><span>he acoustic energy harvester. </span><span lang="EN-US">Three different silencer materials are used, those are</span><span> glasswool, acoustic </span><span lang="EN-US">f</span><span>oam, and styro</span><span lang="EN-US">f</span><span>oam</span><span lang="EN-US">,</span><span> with</span><span lang="EN-US"> the same thickness of</span><span> 12 cm. </span><span lang="EN-US">The r</span><span>esult</span><span lang="EN-US">s</span><span> show that glasswool absorb</span><span lang="EN-US">s</span><span> sound more e</span><span lang="EN-US">ff</span><span>ectively than acostic </span><span lang="EN-US">f</span><span>oam and styro</span><span lang="EN-US">f</span><span>oam. The use o</span><span lang="EN-US">f</span><span> glasswool, acoustic </span><span lang="EN-US">f</span><span>oam, and styro</span><span lang="EN-US">f</span><span>oam with 12 cm thickness lowered the </span><span lang="EN-US">f</span><span>irst peak </span><span lang="EN-US">by</span><span> 90% (</span><span lang="EN-US">f</span><span>rom 39 mW to 0,5 mW), 82% (</span><span lang="EN-US">f</span><span>rom 39 mW to 0,7 mW), and 82% (</span><span lang="EN-US">f</span><span>rom 39 mW to 0,7 mW), respectively. </span><span lang="EN-US">Based on these results, it is concluded that the guess of the origin of the first peak is confirmed.</span>

A panel acoustic energy harvester based on the integration of acoustic metasurface and Helmholtz resonator

2021 ◽  
Vol 119 (25) ◽  
pp. 253903
Author(s):  
Xiaobin Cui ◽  
Jinjie Shi ◽  
Xiaozhou Liu ◽  
Yun Lai
Keyword(s):  
Energy Harvester ◽  
Helmholtz Resonator ◽  
Acoustic Energy

A compact and low-frequency acoustic energy harvester using layered acoustic metamaterials

2019 ◽  
Vol 28 (2) ◽  
pp. 025035 ◽  
Author(s):  
Xiaole Wang ◽  
Jiajie Xu ◽  
Jingjing Ding ◽  
Chunyu Zhao ◽  
Zhenyu Huang
Keyword(s):  
Energy Harvester ◽  
Low Frequency ◽  
Acoustic Energy ◽  
Acoustic Metamaterials

Acoustic wave-driven oxidized liquid metal-based energy harvester

2018 ◽  
Vol 81 (2) ◽  
pp. 20902 ◽  
Author(s):  
Jinpyo Jeon ◽  
Sang Kug Chung ◽  
Jeong-Bong Lee ◽  
Seok Joo Doo ◽  
Daeyoung Kim
Keyword(s):  
Liquid Metal ◽  
Acoustic Wave ◽  
Double Layer ◽  
Electrical Double Layer ◽  
Energy Harvester ◽  
Metal Droplet ◽  
Acoustic Energy ◽  
Maximum Output ◽  
Output Current ◽  
Liquid Metal Droplet

We report an oxidized liquid metal droplet-based energy harvester that converts acoustic energy into electrical energy by modulating an electrical double layer that originates from the deformation of the oxidized liquid metal droplet. Gallium-based liquid metal alloy has been developed for various applications owing to the outstanding material properties, such as its high electrical conductivity (metallic property) and unlimited deformability (liquid property). In this study, we demonstrated energy harvesting using an electrical double layer between the acoustic wave-modulated liquid metal droplet and two electrodes. The proposed energy harvester consisted of top and bottom electrodes covered with the dielectric layer and a Gallium-based liquid metal droplet placed between the electrodes. When we applied an external bias voltage and acoustic wave to the proposed device, the contact area between the liquid metal droplet and the electrodes changed, leading to the variation of the capacitance in the electrical double layer and the generation of electrical output current. Using the proposed energy harvester, the maximum output current of 41.2 nA was generated with an applied acoustic wave of 30 Hz. In addition, we studied the relationships between the maximum output current and a variety of factors, such as the size of the liquid metal droplet, the thickness of the hydrophobic layer, and the distance between the top and bottom electrode plates.

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