埋入式压电陶瓷厚度对激励声能影响的有限元分析.pdf

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1、第27卷第2期传感技术学报Vo1．27No．22014年2月CHINESEJOURNALOFSENSORSANDACTUATORSFeb．2014TheFiniteElementAnalysisontheInfluenceoftheThicknessoftheEmbeddedPZTCeramictotheEnergyofAcousticSignalZHAOAirong，CHEN，LIULi，XUZhilong，WANGQin(School’ElectronicsAndInformationEngineering，SichuanUniversity，Chengdu610064，Chi

2、na)Abstract：Usingtheinversepiezoelectriceffectofpiezoelectricceramicwhichisembeddedinconcrete，wecanmakethereal—timedetectionforthehealthofconcretestructure．Toguaranteethequalityofreceivedsignalatthereceiver，theperiodicpulsewiththeresonantfrequencyofpiezoelectricceramicisusedtoinspirethepiezoel

3、ectricceramic．Butthepiezoelectricceramicwithdifferentthicknesshasdifferentresonantfrequency．UsingAnsyssoftwaretheinfluenceofthicknessofpiezoelectricceramictotheresonantfrequencyhasbeenstudied．Makingthesimulationresearchoftheultrasonicbeamedbypiezoelectricceramictheinfluenceofthicknessofpiezoel

4、ectricceramictoultrasonichasbeenresearchedtoo．Experimentsshowedthatthespectrumofresonantfrequencyhasseveralinflectionpointswhenthethicknessofpiezoelectricceramicislessthan1mm．Forthepiezoelectricceramic，thethicknessofwhichisgreaterthan1mm，ifthethicknesskeepsincreasing，themaximumvibrationamplitu

5、deofpiezoelectricceramicdecreased，andtheresonantfrequencyalsodecreases，usingtheresonantfrequencyofpiezoelectric，withdifferentthickness，toinspirethecorrespondingpiezoelectricceramic，themaximumsoundpressureofultrasonicatthepointofcenterbeamedbypiezoelectricceramicwillincreasewithincreasingthethi

6、cknessofpiezoelectricceramic．Keywords：piezoelectricceramic；thickness；finiteelement；resonantfrequency；ultrasonic；ConcreteEEACC：2860；7810Cdoi：10．3969／j．issn．1004-1699．2014．02．006埋人式压电陶瓷厚度对激励声能影响的有限元分析木赵爱荣，陈雨，刘丽，徐志龙，汪琴(四川大学电子信息学院，成都610064)摘要：将压电陶瓷埋入混凝土构成压电埋人式混凝土机敏模块，利用压电陶瓷的逆压电效应实现对混凝土结构的实时健康检测为保证

7、接收信号质量，采用具有压电陶瓷谐振频率的周期脉冲作为激励。而不同厚度的压电陶瓷具有不同的谐振频率，对于不同厚度的压电陶瓷，激励频率的选择对接收端的超声波信号有较大影响。通过Ansys软件仿真研究压电陶瓷谐振频率随厚度的变化规律，模拟混凝土中压电陶瓷振动辐射的超声波，分析压电陶瓷厚度对辐射超声波的影响。研究表明：压电陶瓷的振幅随厚度的增加逐渐减小；压电陶瓷的厚度小于1mm时，最大振幅对应的谐振频率变化趋势出现多个拐点；厚度大于1mm时，谐振频率随着厚度的增加而减小，辐射