Design, fabrication of line-focus lens-less polyvinylidene fluoride transducers and applications on measuring surface acoustic waves with V(f, z) analytical method - 文章详情页

作者：

He, Cunfu (He, Cunfu.) (学者：何存富) | Lü, Yan (Lü, Yan.) | Song, Guorong (Song, Guorong.) | Wu, Bin (Wu, Bin.) | Lee, Yungchun (Lee, Yungchun.)

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摘要：

Line-focus-beam　ultrasonic　material　property　characterization　system　enables　accurate　measurements　on　the　phase　velocities　of　leaky　surface　acoustic　waves　(LSAW)　or　rayleigh-type　leaky　surface　acoustic　waves.　But　in　view　of　the　lens　of　the　conventional　acoustic　microscopy　is　expensive　and　difficult　to　produce,　new　method　of　design　and　fabrication　of　two　line-focus　lens-less　polyvinylidene　fluoride　(PVDF)　transducers　is　presented　for　acoustic　microscopy　system　utilizing　a　40　μm　thick　piezoelectric　PVDF　film　to　construct　the　active　element.　The　transducers　introduced　here　centre　around　5　MHz　and　11　MHz　respectively.　Different　from　high　cost　of　equipments　and　measuring　the　oscillation　period　Δz　on　an　operation　of　tone-burst　mode,　an　improved　V(f,　z)　method　based　on　tow-dimensional　Fourier　transform　is　developed　for　the　broadband　measurements.　A　defocusing　system　for　measuring　surface　acoustic　waves　is　established　and　a　non-contact　immersion　experiment　of　a　polished　fused　quartz　is　carried　out.　The　LSAW　velocity　extracted　by　V(f,　z)　analytical　technique　is　compared　with　the　theoretical　one　and　they　both　are　in　good　agreement.　©　2011　Journal　of　Mechanical　Engineering.

关键词：

Acoustic microscopes Acoustic surface wave devices Acoustic variables measurement Acoustic waves Design Fabrication Fluorine compounds Fourier series Transducers Ultrasonic applications Ultrasonic transducers

作者机构：

[ 1 ] [He, Cunfu]College of Mechanical Engineering and Applied Electronics Technology, Beijing University of Technology, Beijing 100124, China
[ 2 ] [Lü, Yan]College of Mechanical Engineering and Applied Electronics Technology, Beijing University of Technology, Beijing 100124, China
[ 3 ] [Song, Guorong]College of Mechanical Engineering and Applied Electronics Technology, Beijing University of Technology, Beijing 100124, China
[ 4 ] [Wu, Bin]College of Mechanical Engineering and Applied Electronics Technology, Beijing University of Technology, Beijing 100124, China
[ 5 ] [Lee, Yungchun]College of Mechanical Engineering and Applied Electronics Technology, Beijing University of Technology, Beijing 100124, China
[ 6 ] [Lee, Yungchun]Department of Mechanical Engineering, Cheng Kung University, Tainan 70101, Taiwan, Taiwan

通讯作者信息：

电子邮件地址：

hecunfu@bjut.edu.cn

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