A flexible piezoelectric transducer design for efficient generation and reception of ultrasonic lamb waves

A. Gachagan, G. Hayward, R.A. Banks

Research output: Contribution to journalArticle

27 Citations (Scopus)

Abstract

This paper describes the development of a flexible piezoelectric transducer for the generation and detection of ultrasonic symmetrical Lamb waves in plate-like structures. This piezoplatelet transducer structure comprises an array of miniature piezoceramic plates embedded within a soft setting polymer filler material, combining the efficiency of the active piezoceramic phase with a degree of flexibility, which is a function of the platelet/polymer dimensions. For many condition-monitoring applications, the generation of ultrasonic Lamb waves is often appropriate, and this was achieved by incorporating interdigital design techniques via the transducer electrode pattern. The performance of the piezoplatelet transducer structure was evaluated using a combination of linear systems and finite-element modeling, substantiated by experimental results. Importantly, the transducer is shown to operate as an ensemble of platelets, each operating in the thickness mode and well decoupled from neighboring piezoelectric elements. Using this transducer configuration, an unimodal s/sub 1/ Lamb wave, at 1.45 MHz, has been generated and detected in a 3-mm thick steel plate. Furthermore, a propagation distance of almost 1 m was recorded for s/sub 0/ Lamb wave generation/detection in a fiber-reinforced composite plate.
LanguageEnglish
Pages1175-1182
Number of pages7
JournalIEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control
Volume52
Issue number7
DOIs
Publication statusPublished - 2005

Fingerprint

Piezoelectric transducers
Lamb waves
piezoelectric transducers
Ultrasonic waves
Surface waves
Transducers
transducers
ultrasonics
Platelets
platelets
wave generation
polymers
Condition monitoring
Polymers
linear systems
fillers
Linear systems
Fillers
flexibility
steels

Keywords

  • fibre reinforced plastics
  • polymers
  • element analysis interdigital transducers
  • piezoceramics
  • waves
  • ultrasonic propagation

Cite this

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title = "A flexible piezoelectric transducer design for efficient generation and reception of ultrasonic lamb waves",
abstract = "This paper describes the development of a flexible piezoelectric transducer for the generation and detection of ultrasonic symmetrical Lamb waves in plate-like structures. This piezoplatelet transducer structure comprises an array of miniature piezoceramic plates embedded within a soft setting polymer filler material, combining the efficiency of the active piezoceramic phase with a degree of flexibility, which is a function of the platelet/polymer dimensions. For many condition-monitoring applications, the generation of ultrasonic Lamb waves is often appropriate, and this was achieved by incorporating interdigital design techniques via the transducer electrode pattern. The performance of the piezoplatelet transducer structure was evaluated using a combination of linear systems and finite-element modeling, substantiated by experimental results. Importantly, the transducer is shown to operate as an ensemble of platelets, each operating in the thickness mode and well decoupled from neighboring piezoelectric elements. Using this transducer configuration, an unimodal s/sub 1/ Lamb wave, at 1.45 MHz, has been generated and detected in a 3-mm thick steel plate. Furthermore, a propagation distance of almost 1 m was recorded for s/sub 0/ Lamb wave generation/detection in a fiber-reinforced composite plate.",
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AB - This paper describes the development of a flexible piezoelectric transducer for the generation and detection of ultrasonic symmetrical Lamb waves in plate-like structures. This piezoplatelet transducer structure comprises an array of miniature piezoceramic plates embedded within a soft setting polymer filler material, combining the efficiency of the active piezoceramic phase with a degree of flexibility, which is a function of the platelet/polymer dimensions. For many condition-monitoring applications, the generation of ultrasonic Lamb waves is often appropriate, and this was achieved by incorporating interdigital design techniques via the transducer electrode pattern. The performance of the piezoplatelet transducer structure was evaluated using a combination of linear systems and finite-element modeling, substantiated by experimental results. Importantly, the transducer is shown to operate as an ensemble of platelets, each operating in the thickness mode and well decoupled from neighboring piezoelectric elements. Using this transducer configuration, an unimodal s/sub 1/ Lamb wave, at 1.45 MHz, has been generated and detected in a 3-mm thick steel plate. Furthermore, a propagation distance of almost 1 m was recorded for s/sub 0/ Lamb wave generation/detection in a fiber-reinforced composite plate.

KW - fibre reinforced plastics

KW - polymers

KW - element analysis interdigital transducers

KW - piezoceramics

KW - waves

KW - ultrasonic propagation

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