Rapid Imaging of Large Steel Plate Structures Using Guided Waves
The use of guided waves in NDE applications is widespread  and can be grouped into three categories according to the propagation distances involved. Long-range applications typically involve one-dimensional waveguide structures such as pipes  where the propagation distances are in the order of tens or even hundreds of metres. Plate inspection, where the propagation distance is a few metres, falls into the category of medium-range applications. Guided wave plate inspection in the form of continuous line scanning between two transducers is ideally suited to continuous monitoring of large areas of, for example, steel plate in rolling mills . However, there has been very little commercial exploitation of guided waves for inspecting large areas of plate-like structures from a single location in a manner analogous to that employed in pipe and rail inspection.
KeywordsAttenuation Deconvolution Acoustics Aliasing EMAT
Unable to display preview. Download preview PDF.
- 2.Alleyne, D., Pavlakovic, B., Lowe, M. and Cawley, P. (2001) Rapid long-range inspection of chemical plant pipework using guided waves, Insight, 43, 93.Google Scholar
- 4.Viktorov, I. (1967) Rayleigh and Lamb waves: Physical theory and applications, Plenum Press, New York.Google Scholar
- 7.Wilcox, P., Lowe, M. and Cawley, P. (2000) Lamb and SH wave transducer arrays for the inspection of large areas of thick plates, in D. Thompson and D. Chimenti (eds.), Review of Progress in Quantitative NDE, Vol. 19B, AIP, New York, pp. 1049–1056.Google Scholar
- 8.Wilcox, P. (2001) A signal processing technique to remove the effect of dispersion from guided wave signals, in D. Thompson and D. Chimenti (eds.), Review of Progress in Quantitative NDE, Vol. 20A, AIP, New York, pp. 555–562.Google Scholar
- 9.Diligent, O., Lowe, M., Cawley, P. (2002) Reflection and scattering of the So Lamb mode from 3-D circular defects in plates, in D. Thompson and D. Chimenti (eds.), Review oof Progress in Quantitative NDE, Vol. 21A, AIP, New York, pp. 231–238.Google Scholar