Measurement of surface & lamb waves with application on acoustic sensing & non-destructive evaluation

Yung Chun Lee, Shi Hoa Kuo, Cheng Hsien Chung

研究成果: Conference contribution

1 引文 斯高帕斯(Scopus)

摘要

This paper summarizes the design and fabrication of several novel ultrasound transducers for measuring surface and Lamb waves. The experimental setup and measurement method for each developed transducer are also addressed. According to piezoelectric materials being used, two types of ultrasound transducers are discussed which are PVDF focusing transducers and micro-machined PZT transducers. For the PVDF transducers, a defocusing measurement along with a V(f,z) waveform processing technique are developed which allow accurately determination of dispersion curves of either surface waves of a layered medium or Lamb waves of a thin plate. Elastic properties of coating layers and thin plates are therefore non-destructive determined. For the micro-machined PZT transducers, a differential type wave velocity measurement is developed which is extremely sensitive to small wave velocity variation. Hence, the mechanical and dielectric loading effects of a fluid to the Lamb waves of a piezoelectric plate are experimentally and theoretically characterized, which can be used for acoustic sensing of fluids.

原文English
主出版物標題IUTAM Symposium on Recent Advances of Acoustic Waves in Solids - Proceedings of the IUTAM Symposium on Recent Advances of Acoustic Waves in Solids
編輯Tsung-Tsong Wu, Chien-Ching Ma
發行者Springer Verlag
頁面95-103
頁數9
ISBN(列印)9789048198924
DOIs
出版狀態Published - 2010
事件IUTAM Symposium on Recent Advances of Acoustic Waves in Solids, 2009 - Taipei, Taiwan
持續時間: 2009 五月 252009 五月 28

出版系列

名字IUTAM Bookseries
26
ISSN(列印)1875-3507

Other

OtherIUTAM Symposium on Recent Advances of Acoustic Waves in Solids, 2009
國家/地區Taiwan
城市Taipei
期間09-05-2509-05-28

All Science Journal Classification (ASJC) codes

  • 土木與結構工程
  • 汽車工程
  • 航空工程
  • 聲學與超音波
  • 機械工業

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