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

Yung Chun Lee, Shi Hoa Kuo, Cheng Hsien Chung

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)

Abstract

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.

Original languageEnglish
Title of host publicationIUTAM Symposium on Recent Advances of Acoustic Waves in Solids - Proceedings of the IUTAM Symposium on Recent Advances of Acoustic Waves in Solids
EditorsTsung-Tsong Wu, Chien-Ching Ma
PublisherSpringer Verlag
Pages95-103
Number of pages9
ISBN (Print)9789048198924
DOIs
Publication statusPublished - 2010 Jan 1
EventIUTAM Symposium on Recent Advances of Acoustic Waves in Solids, 2009 - Taipei, Taiwan
Duration: 2009 May 252009 May 28

Publication series

NameIUTAM Bookseries
Volume26
ISSN (Print)1875-3507

Other

OtherIUTAM Symposium on Recent Advances of Acoustic Waves in Solids, 2009
CountryTaiwan
CityTaipei
Period09-05-2509-05-28

All Science Journal Classification (ASJC) codes

  • Civil and Structural Engineering
  • Automotive Engineering
  • Aerospace Engineering
  • Acoustics and Ultrasonics
  • Mechanical Engineering

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  • Cite this

    Lee, Y. C., Kuo, S. H., & Chung, C. H. (2010). Measurement of surface & lamb waves with application on acoustic sensing & non-destructive evaluation. In T-T. Wu, & C-C. Ma (Eds.), IUTAM Symposium on Recent Advances of Acoustic Waves in Solids - Proceedings of the IUTAM Symposium on Recent Advances of Acoustic Waves in Solids (pp. 95-103). (IUTAM Bookseries; Vol. 26). Springer Verlag. https://doi.org/10.1007/978-90-481-9893-1_9