梯形悬臂梁压电振动俘能器的特性研究  

Research on Characteristics of Piezoelectric Vibration Energy Harvester of Trapezoidal Cantilever Beam

作　　者：马天兵[1,2] 贾世盛 丁永静 尹梦涵 MA Tian-bing;JIA Shi-sheng;DING Yong-jing;YIN Meng-han(State Key Laboratory of Mining Response and Disaster Prevention and Control in Deep Coal Mines,Anhui University of Science and Technology,Huainan 232001,China;Department of Mechanical Engineering,Anhui University of Science and Technology,Huainan 232001,China)

机构地区：[1]安徽理工大学深部煤矿采动响应与灾害防控国家重点实验室,安徽淮南232001 [2]安徽理工大学机械工程学院,安徽淮南232001

出　　处：《仪表技术与传感器》2021年第11期43-47,共5页Instrument Technique and Sensor

基　　金：安徽高校协同创新项目(GXXT-2019-048);安徽省自然科学基金资助项目(2008085ME178);安徽高校学科拔尖人才项目(gxbjZD202020063);安徽高校自然科学研究项目资助(KJ2020A0281)。

摘　　要：考虑现有的矩形悬臂梁压电俘能器存在固有频率较高、压电材料利用率较低、输出电压低等缺点,提出一种梯形悬臂梁压电振动俘能结构,建立梯形悬臂梁表面应变分布模型,对其进行梁特性仿真分析,并通过实验验证了梁特性分析结果。研究结果表明:与矩形悬臂梁结构相比,梯形悬臂梁压电振动俘能器的压电材料利用率高、一阶谐振频率低、输出电压以及功率高,在一阶谐振频率下,梯形悬臂梁俘能器的最大输出电压为13.8 V。Considering that the existing rectangular cantilever beam piezoelectric energy harvester has the disadvantages of high natural frequency,low utilization rate of piezoelectric materials,and low output voltage,this paper proposed a trapezoidal cantilever beam piezoelectric vibration energy-trapping structure,established a trapezoidal cantilever beam surface strain distribution model,beam characteristic simulation analysis was conducted on it,and the beam characteristic analysis results were verified through experiments.The research results show that compared with the rectangular cantilever beam structure,the trapezoidal cantilever beam piezoelectric vibration energy harvester has high piezoelectric material utilization,low first-order resonance frequency,high output voltage and high power.At the first-order resonance frequency,the maximum output voltage of the trapezoidal cantilever beam harvester is 13.8 V.

关 键 词：能量收集 压电效应 矩形梁 梯形梁 性能分析 

分 类 号：TM619[电气工程—电力系统及自动化]