Piezoelectric materials for application in low profile interdigital transducer designs

Anthony Gachagan, P. Reynolds, Gordon Hayward, R Monkhouse, P Cawley

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

7 Citations (Scopus)

Abstract

This paper presents a comparative study between piezopolymer (PVDF) and piezo-platelet active layers in flexible interdigital transducer (IDT) designs for the generation of ultrasonic Lamb waves in thin plate structures. Initially, the pulse-echo response in steel was evaluated, where the piezo-platelet transducer demonstrates significant sensitivity advantage over the PVDF devices. The mechanical behaviour of each transducer was further investigated using a laser interferometer scanner to measure surface displacement and evaluate the extent of cross coupling and electrode pattern on the IDT response. Furthermore, finite element modelling has been utilised to evaluate the IDT coupling efficiency for the generation of a particular ultrasonic Lamb wave mode. Interestingly, it is shown that the properties of each transducer tend to be complementary with respect to a particular application. The piezo-platelet materials possess distinct advantages for generation of in plane, symmetric modes, especially for operation in composite plates, while the PVDF, although less efficient, has advantages with regard to cost and flexibility for the generation of anti-symmetric modes in metallic plates.
Original languageEnglish
Title of host publication1997 IEEE Ultrasonics Symposium Proceedings
EditorsS.C. Schneider, M. Levy, B.R. McAvoy
Place of PublicationNew York
PublisherIEEE
Pages1025-1028
Number of pages4
ISBN (Print)0780341538
DOIs
Publication statusPublished - 1997
Event1997 IEEE Ultrasonics Symposium Proceedings - Toronto, Canada
Duration: 5 Oct 19978 Oct 1997

Conference

Conference1997 IEEE Ultrasonics Symposium Proceedings
CountryCanada
CityToronto
Period5/10/978/10/97

Keywords

  • interdigital transducer designs
  • piezoelectric materials
  • application
  • low profile
  • finite element analysis
  • polymer films
  • laser modes
  • optical coupling
  • lamb waves

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  • Cite this

    Gachagan, A., Reynolds, P., Hayward, G., Monkhouse, R., & Cawley, P. (1997). Piezoelectric materials for application in low profile interdigital transducer designs. In S. C. Schneider, M. Levy, & B. R. McAvoy (Eds.), 1997 IEEE Ultrasonics Symposium Proceedings (pp. 1025-1028). IEEE. https://doi.org/10.1109/ULTSYM.1997.661755