Towards Guided Wave Robotic NDT Inspection: EMAT Size Matters

Oksana Trushkevych, S. Dixon, M. Tabatabaeipour, G. Dobie, M.D.G. Potter, Anthony Gachagan, Charles MacLeod, R.S. Edwards, Gareth Pierce

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

3 Citations (Scopus)


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 SH1 wavemodes 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
Title of host publicationIEEE International Ultrasonics Symposium, IUS
Number of pages4
ISBN (Electronic)978-1-7281-4596-9
ISBN (Print)978-1-7281-4597-6
Publication statusPublished online - 8 Dec 2019

Bibliographical note

This work was funded by the EPSRC “UK Research Centre in Non-Destructive Evaluation (RCNDE)” (EP/L022125/1), Core Research 2018-20, “Remote and Automated Delivery of Non-Contact NDE”.


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