Towards guided wave robotic NDT inspection: EMAT size matters

Oksana Trushkevych, Steven Dixon, Morteza Tabatabaeipour, Gordon Dobie, Mark D. G. Potter, Charles MacLeod, Anthony Gachagan, S. Gareth Pierce, Rachel S. Edwards

Research output: Contribution to conferencePaperpeer-review

3 Citations (Scopus)
35 Downloads (Pure)


The first steps towards fast robotic screening of wall thinning in the industrially relevant example of 10mm thick steel plates are reported. Electromagnetic acoustic transducers (EMATs) are used to generate and detect guided shear horizontal wavemodes, as these show promise for this type of inspection. EMATs are miniaturised to reduce magnetic drag on ferritic steels, and are designed to produce SH0 and SH1wavemodes with 22mm wavelength, which is suitable for testing wall thinning in these samples. Miniaturisation and the resulting reduction of magnetic drag force allows the EMATs to be mounted on a small crawler robot which can then be used to scan the sample/structure.
Original languageEnglish
Number of pages4
Publication statusPublished - 6 Oct 2019
Event2019 IEEE International Ultrasonics Symposium: IEEE UFFC - SECC, Glasgow, United Kingdom
Duration: 6 Oct 20199 Oct 2019


Conference2019 IEEE International Ultrasonics Symposium
Abbreviated titleIUS 2019
Country/TerritoryUnited Kingdom
Internet address


  • EMAT
  • SH guided waves
  • NDT
  • robotic inspection


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