碰撞式微型压电风能采集器实验研究.pdf

第11卷第3期纳米技术与精密工程Vol．11No．3
2013年5月NanotechnologyandPrecisionEngineeringMay2013

ExperimentStudiesonImpact-BasedPiezoelectricWindEnergyHarvester

HeXuefeng1，2，GaoJun1，2，XiaHuilu1
(1．KeyLaboratoryofOptoelectronicTechnologyandSystemsofMinistryofEducation，
ChongqingUniversity，Chongqing400044，China;
2．MicrosystemResearchCenter，ChongqingUniversity，Chongqing400044，China)

Abstract:Toimprovetheoutputperformancesofwindenergyharvestersunderlowspeedwind，apiezoe-
lectricwindenergyharvesterbasedonimpactwasproposed．Theharvesterconsistsofacylindricalbluff
body，ahinged-splitterplate，apiezoelectriccompositecantileverbeamandafixture．Byutilizingtheim-
pactbetweenthesplitterplatehingedonthecylindricalbluffbodyandthepiezoelectriccantilever，the
workingwindspeediseffectivelydecreased．Theprototypeofthewindenergyharvesterwasassembled
andmeasuredtoevaluatetheperformances．Experimentalresultsshowedthattheinitialdistancebetween
thesplitterplateandthecantileverbeamsignificantlyaffectedtheworkingwindspeedandtheoutput
poweroftheharvester．Theproofmassonthepiezoelectriccantilevercanincreasetheoutputpower．The
measuredmaximumoutputpowerofthewindenergyharvesterwas64μWforamatchedresistorof200
kΩwhenwindspeedwas15m/s．
Keywords:wind-induced-vibration;impact;piezoelectricity;windenergyharvester

碰撞式微型压电风能采集器实验研究

贺学锋1，2，高军1，2，夏辉露1
(1．重庆大学光电技术及系统教育部重点实验室，重庆400044;
2．重庆大学微系统研究中心，重庆400044)

摘要:为提高基于风致振动机理的微型风能采集器在低风速下的输出功率，设计了一种新型的碰撞式微型压电
风能采集器．采集器主要由圆柱形钝体、铰接分隔板、压电悬臂梁和支架组成．通过铰接分隔板和压电悬臂梁的碰
撞有效降低了采集器的工作风速．加工制作了采集器的原理样机并在小型风洞内进行了实验测量．通过实验发现
分隔板与压电片横向间距对采集器的工作风速和输出功率有很大的影响．压电悬臂梁自由端添加质量块可以提高
输出功率．风速15m/s、外接200kΩ优化负载时，采集器最大输出功率为64μW．
关键词:风致振动;碰撞;压电;风能采集器
中图分类号:TM387文献标志码:A文章编号:1672-6030(2013)03-0191-05

WiththedevelopmentofMEMStechnologyandul-vesterswhichconverttheambientphysicalenergyinto
tra-lowpowerconsumptionintegrationcircuits(ICs)，electricalenergyhavebeenstudiedextensively．Dueto
self-poweredsensornodesofwirelesssensornetworkstheubiquitouswindenergyinnaturalenvironment，wind
(WSNs)attractmoreandmoreattention［1