Lamb wave dispersion compensation in piezoelectric wafer active sensor phased-array applications

Buli Xu; Lingyu Yu; Victor Giurgiutiu

doi:10.1117/12.816085

8 April 2009 Lamb wave dispersion compensation in piezoelectric wafer active sensor phased-array applications

Buli Xu, Lingyu Yu, Victor Giurgiutiu

Proceedings Volume 7295, Health Monitoring of Structural and Biological Systems 2009; 729516 (2009) https://doi.org/10.1117/12.816085
Event: SPIE Smart Structures and Materials + Nondestructive Evaluation and Health Monitoring, 2009, San Diego, California, United States

Abstract

Lamb-wave testing for structural health monitoring is complicated by the dispersion nature of the wave modes. The dispersion effect will result in a propagated wave with longer time duration, deformed envelop shape as compared to its excitation counterpart, and hard to be interpreted. This paper first reviews the dispersion compensation and removal algorithms. Second, it compares these two methods by applying them to two widely used low-frequency Lamb wave modes: S0 and A0. Numerical simulations are compared in parallel with experimental results. Finally, the dispersion compensation algorithm is applied to 1-D PWAS phased array and demonstrated to improve the phase array's spatial resolution.

Citation Download Citation

Buli Xu, Lingyu Yu, and Victor Giurgiutiu "Lamb wave dispersion compensation in piezoelectric wafer active sensor phased-array applications", Proc. SPIE 7295, Health Monitoring of Structural and Biological Systems 2009, 729516 (8 April 2009); https://doi.org/10.1117/12.816085

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