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Proceedings Paper

Phased annular array transducers for ultrasonic guided wave applications
Author(s): Fei Yan; Cody Borigo; Yue Liang; Jaya P. Koduru; Joseph L. Rose
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Paper Abstract

Mode and frequency control always plays an important role in ultrasonic guided wave applications. In this paper, theoretical understanding of guided wave excitations of axisymmetric sources on plate structures is established. It is shown that a wave number spectrum can be used to investigate the guided wave excitations of an axisymmetric source. The wave number spectrum is calculated from a Hankel transform of the axial source loading profile. On the basis of the theoretical understanding, phased annular array transducers are developed as a powerful tool for guided wave mode and frequency control. By applying appropriate time delays to phase the multiple elements of an annular array transducer, guided wave mode and frequency tuning can be achieved fully electronically. The phased annular array transducers have been successfully used for various applications. Example applications presented in this paper include phased annular arrays for guided wave beamforming and a novel ultrasonic vibration modal analysis technique for damage detection.

Paper Details

Date Published: 31 March 2011
PDF: 10 pages
Proc. SPIE 7984, Health Monitoring of Structural and Biological Systems 2011, 79840S (31 March 2011); doi: 10.1117/12.882099
Show Author Affiliations
Fei Yan, FBS Inc. (United States)
Cody Borigo, The Pennsylvania State Univ. (United States)
Yue Liang, The Pennsylvania State Univ. (United States)
Jaya P. Koduru, The Pennsylvania State Univ. (United States)
Joseph L. Rose, FBS Inc. (United States)
The Pennsylvania State Univ. (United States)


Published in SPIE Proceedings Vol. 7984:
Health Monitoring of Structural and Biological Systems 2011
Tribikram Kundu, Editor(s)

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