@inproceedings{62aaff9f8ea24c8e86180ef63b07d957,
title = "Long range ultrasonic guided wave focusing in pipe using a phased-array system",
abstract = "Guided wave focusing in pipe is discussed from three aspects: theoretical calculations, numerical FEM simulations, and experimental verifications. The guided wave focusing techniques are used to provide us with higher wave penetration power and defect circumferential resolution. An ultrasonic multi-channel phased-array system is employed to achieve guided wave focusing at a predetermined position in a pipe. When appropriate amplitudes and time-delays are applied to different channels of the phased array system, a constructive interference can be realized at the pre-determined focal spot. FEM simulations are performed to verify the theories and visualize the focusing phenomenon. The increase in penetration power is verified by experiments.",
author = "Jing Mu and Rose, {Joseph L.}",
year = "2007",
doi = "10.1063/1.2717968",
language = "English (US)",
isbn = "0735403996",
series = "AIP Conference Proceedings",
pages = "158--162",
booktitle = "Review of Progress in Quantitative Nondestructive Evaluation",
note = "REVIEW OF PROGRESS IN QUANTITATIVE NONDESTRUCTIVE EVALUATION ; Conference date: 30-07-2006 Through 04-08-2006",
}