基于压电陶瓷的俘能技术研究-仪器仪表工程专业论文.docx

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2018-05-05 发布于上海
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基于压电陶瓷的俘能技术研究-仪器仪表工程专业论文.docx

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基于压电陶瓷的俘能技术研究-仪器仪表工程专业论文

AbstractWiththedevelopmentofMEMStechnology,ICtechnologyandwirelesssensingtechnologyinrecentyears,Electronicproductssuchastheembeddedsystem,theRFrecognitionsystem,wirelesssensorsaswellasotherimplantedmicro-sensorscomeintotheageofintegration,miniaturizationandlow powerconsumption. However,the traditionalchemicalbatteriesaredifficulttomeettheneedsoftheenergysupplyofmicro-devicesbecauseofthevariousunfavorablefactorssuchasbulk,shortlifeandlimitedenergystorageaswellasenvironmentalpollution.Therefore,studyonnewpowersupplytechnologyhasbecomeaurgentproblem tobesolved.Asurveyofthepiezoelectrictransducertechnologyathomeandabroadissummarized.Theresearchachievementsofthepiezoelectricmaterialtechnology,piezoelectricvibratorstructuretechnologyandenergystoragetechnologyaredeeplydiscussed.Firstly,piezoelectriceffectprinciple isintroducedindetail.Anequivalentcircuitmodelabouttheenergyoutputofthepiezoelectrictransduceris established,byreferencetotheelectromechanicalcouplingcharacteristicsofthepiezoelectricceramic.Theformulasoftheresonancefrequency,piezoelectricvoltageandpoweroutputare deducedaccordingtothe model.Secondly,thestructureofthepiezoelectrictransducerhasbeenoptimized.Threepiezoelectricmodelshavebeendesignedandthe static analysis ofthethreepiezoelectricmodelsis carriedoutbyusingtheANSYSfiniteelementsimulationsoftware.Theeffectofresonantfrequencyonelectricitygenerationofthepiezoelectrictransducerisanalyzed.Apiezoelectrictransducerwithwidefrequencyresponseisdesignedandamodel ofthepiezoelectrictransducerisestablishedby theANSYSfiniteelementsimulationsoftware.Then,thefirstandsecondordermodesofvibrationandthecurveoftheamplitude-frequencyaregottenviatheanalysisofthesimulation.Finally,acompletesetofexperimentaltestsystemofself-poweredwirelesssensorhasbeenestablished.Electricalenergyofpiezoelectrictransducerissuppliedtothetransmittermoduleofthetemperaturesensor.Thesystemcan continue tosenda temperaturesignalin theabsenceofanyexternalpowersupply.Anoptimizationmodelofthepiezoelectri