Yuan Ming, Cao Ziping, Luo Jun, Chou Xiujian
School of Automation, Nanjing University of Posts and Telecommunications, Nanjing 210023, China.
School of Telecommunications and Information Engineering, Nanjing University of Posts and Telecommunications, Nanjing 210023, China.
Micromachines (Basel). 2019 Jan 11;10(1):48. doi: 10.3390/mi10010048.
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.
声能是一种环境能源，可以被收集并转化为电能，用于小规模电力应用。一般来说，入射声功率密度较低，因此用于声能收集（AEH）的结构设计至关重要。这篇综述文章总结了声能收集的机制，包括亥姆霍兹共振器方法、四分之一波长共振器方法和声超材料方法。对最近提出的声能收集装置和机制的细节进行了仔细的综述和比较。由于声超材料具有紧凑、有效和灵活的优点，因此建议新兴的基于超材料的声能收集技术非常适合进一步发展。结果表明，声能收集技术将成为环境能源收集研究领域的重要组成部分。作为一个多学科研究课题，主要挑战是将声能收集装置集成到工程结构中，并使复合结构更智能，以实现大规模声能收集。
