A combination of PZT and EMAT transducers for interface inspection

Won Bae Na, Tribikram Kundu

Research output: Contribution to journalArticle

23 Citations (Scopus)

Abstract

A PZT (Lead Zirconate-Titanate) transducer requires a couplant to send and receive mechanical waves. This requirement is a major shortcoming of the PZT technique for use in field applications. In the laboratory environment careful considerations and surface treatments are required to use PZT because the couplant can affect the consistency of experimental results. One alternative to overcome this shortcoming is the use of EMAT (ElectroMagnetic Acoustic Transducer). However, EMAT gives relatively low transmitted ultrasonic energy, with low signal to noise ratio, and the induced energy is critically dependent on the probe proximity to the test object. These are not desirable properties for NDT (nondestructive testing) of civil infrastructures. That is why, in this paper, a combination of PZT and EMAT is introduced for investigating reinforced concrete structures. Interface defects between steel bars and concrete are investigated by this technique. It is shown that the PZT-EMAT combination is very effective for steel bar-concrete interface inspection and the guided waves are useful for nondestructive testing of civil infrastructures.

Original languageEnglish (US)
Pages (from-to)2128-2139
Number of pages12
JournalJournal of the Acoustical Society of America
Volume111
Issue number5 I
DOIs
StatePublished - 2002

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inspection
transducers
electromagnetism
acoustics
steels
concrete structures
surface treatment
proximity
signal to noise ratios
ultrasonics
Acoustics
Electromagnetic
requirements
energy
probes
defects
Waves
Nondestructive Testing
Energy
Steel

ASJC Scopus subject areas

  • Acoustics and Ultrasonics

Cite this

A combination of PZT and EMAT transducers for interface inspection. / Na, Won Bae; Kundu, Tribikram.

In: Journal of the Acoustical Society of America, Vol. 111, No. 5 I, 2002, p. 2128-2139.

Research output: Contribution to journalArticle

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