机械科学与技术2024，Vol.43Issue(1)：110-116,7.DOI:10.13433/j.cnki.1003-8728.20220235
声学超材料和亥姆霍兹共振结构的自供能传感器
A Self-powered Sensor of Acoustic Metamaterial and Helmholtz Resonator Structure
摘要
Abstract
With the development of Internet of Things,self-powered acoustic sensors have attracted extensive attention.However,it is difficult to further improve piezoelectric sensors'sensitivity and other vital indicators.Acoustic metamaterials can manipulate sound waves,while traditional materials cannot,thus providing a new method for designing new acoustic sensors.This paper designs a self-powered sensor of acoustic metamaterial and Helmholtz resonance structure.It also verifies that the defective acoustic metamaterial can focus acoustic energy.In addition,the Helmholtz resonator can further amplify the acoustic energy focused on the defective acoustic metamaterial.Its transmission ratio is more than 40 mV/Pa and meets the demand of a small self-powered sensor.The experimental results show that compared with the acoustic metamaterial sensor,the acoustic metamaterial sensor based on the Helmholtz resonator has higher sensitivity and signal-to-noise ratio.关键词
声学超材料/亥姆霍兹谐振器/声学传感器Key words
acoustic metamaterials/Helmholtz resonator/acoustic sensor分类
机械工程引用本文复制引用
马珂婧,陈虎越,张文明..声学超材料和亥姆霍兹共振结构的自供能传感器[J].机械科学与技术,2024,43(1):110-116,7.基金项目
国家自然科学基金项目(11625208) （11625208）
