Guided wave thickness measurement with EMATs
- 1 November 2003
- journal article
- Published by British Institute of Non-Destructive Testing (BINDT) in Insight - Non-Destructive Testing and Condition Monitoring
- Vol. 45 (11), 735-739
- https://doi.org/10.1784/insi.45.11.735.52961
Abstract
Guided waves can be used for the thickness measurement of a stainless steel vessel. Commonly used piezoelectric transducers for guided wave generation are often not suitable because of potential couplant contamination. Therefore, a non-contact electromagnetic acoustic transducer (EMAT) was used in this study for non-contact measurement. A sample stainless plate with four different thicknesses was made for the study. A direct and an indirect measurement method based on the relationship between the peak frequency shift and the thickness change were developed. Great accuracy for the thickness measurement was realised.Keywords
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