Guided waves can be used in pipe inspection over long distances. Presented in this paper is a beam focusing technique to improve the S/N ratio of the reflection from a tiny defect. Focusing is accomplished by using non-axisymmetric waveforms and subsequent time delayed superposition at a specific point in a pipe. A semi-analytical finite element method is used to present wave structure in the pipe. Focusing potential is also studied with various modes and frequencies.
- Pressure Vessels and Piping Division
Guided Wave Focusing Mechanics in Pipe
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Hayashi, T, Kawashima, K, Sun, Z, & Rose, JL. "Guided Wave Focusing Mechanics in Pipe." Proceedings of the ASME 2003 Pressure Vessels and Piping Conference. Ultrasonic Nondestructive Evaluation for Material Science and Industries. Cleveland, Ohio, USA. July 20–24, 2003. pp. 35-41. ASME. https://doi.org/10.1115/PVP2003-1850
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