Acoustic metastructure for effective low-frequency acoustic energy harvesting

In this study, a multifunctional acoustic metastructure is proposed to achieve both effective low-frequency sound isolation and acoustic energy harvesting. A metallic substrate with proof mass is adopted to generate the local resonant phenomenon for the purpose of overcoming the drawbacks of the previous rubber film-based acoustic metastructure; the latter usually requires an elaborate tension process. Numerical simulations show that the proposed structure exhibits excellent noise isolation performance in the low-frequency band. Meanwhile, the incident sound energy can be converted into electrical energy with the help of an added piezoelectric patch. Numerical simulation results indicate that the harvested energy can reach the mW level. The parameters’ influence on the metastructure’s vibro-acoustic and energy harvesting performance are discussed in detail. An optimized configuration is selected and used for experimental study. It is demonstrated that 0.21 mW electrical power at 155 Hz can be harvested by the proposed metastructure under 114 dB sound pressure excitation.

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Optimizing the Electrical Power in an Energy Harvesting System

International Journal of Bifurcation and Chaos ◽

10.1142/s0218127415501710 ◽

2015 ◽

Vol 25 (12) ◽

pp. 1550171 ◽

Cited By ~ 5

Author(s):

Mattia Coccolo ◽

Grzegorz Litak ◽

Jesús M. Seoane ◽

Miguel A. F. Sanjuán

Keyword(s):

Energy Harvesting ◽

Kinetic Energy ◽

High Frequency ◽

Energy Harvester ◽

Electrical Power ◽

Low Frequency ◽

Electrical Energy ◽

Resonance Phenomenon ◽

Vibrational Resonance ◽

Energy Harvesting System

In this paper, we study the vibrational resonance (VR) phenomenon as a useful mechanism for energy harvesting purposes. A system, driven by a low frequency and a high frequency forcing, can give birth to the vibrational resonance phenomenon, when the two forcing amplitudes resonate and a maximum in amplitude is reached. We apply this idea to a bistable oscillator that can convert environmental kinetic energy into electrical energy, that is, an energy harvester. Normally, the VR phenomenon is studied in terms of the forcing amplitudes or of the frequencies, that are not always easy to adjust and change. Here, we study the VR generated by tuning another parameter that is possible to manipulate when the forcing values depend on the environmental conditions. We have investigated the dependence of the maximum response due to the VR for small and large variations in the forcing amplitudes and frequencies. Besides, we have plotted color coded figures in the space of the two forcing amplitudes, in which it is possible to appreciate different patterns in the electrical power generated by the system. These patterns provide useful information on the forcing amplitudes in order to produce the optimal electrical power.

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An Optimal Piezoelectric Beam for Acoustic Energy Harvesting

10.22541/au.161582232.27735705/v1 ◽

2021 ◽

Author(s):

Amir Panahi ◽

Alireza Hassanzadeh ◽

Ali Moulavi ◽

Ata Golparvar

Keyword(s):

Energy Harvesting ◽

Polyvinylidene Fluoride ◽

Maximum Yield ◽

Electrical Energy ◽

Point Sources ◽

Acoustic Energy ◽

Highway Traffic ◽

Piezoelectric Beam ◽

Optimum Placement ◽

Acoustic Energy Harvesting

This study presents a novel piezoelectric beam structure for acoustic energy harvesting. The beams have been designed to maximize output energy in areas where the noise level is loud such as highway traffic. The beam consists of two layers (copper and polyvinylidene fluoride) that convert the ambient noise’s vibration energy to electrical energy. The piezoelectric material’s optimum placement have been studied, and its best positon is obtained on the substrate for the maximum yield. Unlike previous studies, which the entire beam substrate used to be covered by a material, this study presents a modest material usage and contributes to lowering the harvester’s final production cost. Additionally, in this study, an electrical model was developed for the sensor and a read-out circuitry was proposed for the converter. Moreover, the sensor was validated at different noise levels at various lengths and locations. The simulations were performed in COMSOL Multiphysics® and MATLAB® and report a maximum sound pressure of 140 dB from 100 dB point sources in an enclosed air-filled cubic meter chamber.

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Low frequency acoustic energy harvesting using PZT piezoelectric plates in a straight tube resonator

Smart Materials and Structures ◽

10.1088/0964-1726/22/5/055013 ◽

2013 ◽

Vol 22 (5) ◽

pp. 055013 ◽

Cited By ~ 56

Author(s):

Bin Li ◽

Jeong Ho You ◽

Yong-Joe Kim

Keyword(s):

Energy Harvesting ◽

Low Frequency ◽

Acoustic Energy ◽

Straight Tube ◽

Acoustic Energy Harvesting ◽

Piezoelectric Plates

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Performance of K0.5Na0.5NbO3-LiSbO3-CaTiO3 ceramics in acoustic energy harvesting exposed to sound pressure

Ferroelectrics ◽

10.1080/00150193.2016.1240569 ◽

2016 ◽

Vol 504 (1) ◽

pp. 149-159 ◽

Cited By ~ 1

Author(s):

Anuruddh Kumar ◽

Anshul Sharma ◽

Rajeev Kumar ◽

Rahul Vaish ◽

C. R. Bowen

Keyword(s):

Energy Harvesting ◽

Sound Pressure ◽

Acoustic Energy ◽

Acoustic Energy Harvesting

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Recent acoustic energy harvesting methods and mechanisms: A review

Noise & Vibration Worldwide ◽

10.1177/09574565211030702 ◽

2021 ◽

pp. 095745652110307

Author(s):

Avadhut T Patil ◽

Maruti B Mandale

Keyword(s):

Energy Harvesting ◽

Energy Conversion ◽

Piezoelectric Element ◽

Helmholtz Resonator ◽

Electrical Energy ◽

Research Field ◽

Acoustic Energy ◽

Compact Structure ◽

Acoustic Metamaterial ◽

Acoustic Energy Harvesting

This review article summarises the mechanism of the acoustic energy harvester or converter which includes the compact structure of the piezoelectric element, electromagnetic transducer and Helmholtz resonator; different shapes of Helmholtz resonators, piezoelectric cantilever, acoustic metamaterial-based approach, electrostatic transduction method, auxetic structure of material and other techniques. The recently established methods of acoustic energy harvesting and converting mechanisms; devices are carefully reviewed, and their results are compared and listed in the table. The technique of energy conversion by using acoustic metamaterial will tend to be more efficacious due to its complexity and the structure. Even in the few noise attenuation applications, more metamaterial is used, where, with the help of the conversion mechanism, the noise or sound energy can be converted into electrical energy for small electronic applications. It is demonstrated that the acoustic energy-conversion technique will become an essential part of the environmental energy harvesting research field.

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Helix structure for low frequency acoustic energy harvesting

Review of Scientific Instruments ◽

10.1063/1.5021526 ◽

2018 ◽

Vol 89 (5) ◽

pp. 055002 ◽

Cited By ~ 11

Author(s):

Ming Yuan ◽

Ziping Cao ◽

Jun Luo ◽

Zongqiang Pang

Keyword(s):

Energy Harvesting ◽

Low Frequency ◽

Acoustic Energy ◽

Helix Structure ◽

Acoustic Energy Harvesting

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Recent Developments of Acoustic Energy Harvesting: A Review

Micromachines ◽

10.3390/mi10010048 ◽

2019 ◽

Vol 10 (1) ◽

pp. 48 ◽

Cited By ~ 21

Author(s):

Ming Yuan ◽

Ziping Cao ◽

Jun Luo ◽

Xiujian Chou

Keyword(s):

Energy Harvesting ◽

Composite Structures ◽

Large Scale ◽

Electrical Energy ◽

Research Field ◽

Acoustic Energy ◽

Small Scale ◽

Acoustic Metamaterials ◽

Engineering Structures ◽

Acoustic Energy Harvesting

Acoustic energy is a type of environmental energy source that can be scavenged and converted into electrical energy for small-scale power applications. In general, incident sound power density is low and structural design for acoustic energy harvesting (AEH) is crucial. This review article summarizes the mechanisms of AEH, which include the Helmholtz resonator approach, the quarter-wavelength resonator approach, and the acoustic metamaterial approach. The details of recently proposed AEH devices and mechanisms are carefully reviewed and compared. Because acoustic metamaterials have the advantages of compactness, effectiveness, and flexibility, it is suggested that the emerging metamaterial-based AEH technique is highly suitable for further development. It is demonstrated that the AEH technique will become an essential part of the environmental energy-harvesting research field. As a multidisciplinary research topic, the major challenge is to integrate AEH devices into engineering structures and make composite structures smarter to achieve large-scale AEH.

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