Lamb Wave Dispersion Compensation in Piezoelectric Wafer Active Sensor Phased-Array Applications

被引：3
|
作者：
Xu, Buli [1 ]
Yu, Lingyu [1 ]
Giurgiutiu, Victor [1 ]
机构：
[1] Univ South Carolina, Mech Engn Dept, Columbia, SC 29208 USA
来源：
HEALTH MONITORING OF STRUCTURAL AND BIOLOGICAL SYSTEMS 2009 | 2009年 / 7295卷
基金：
美国国家科学基金会;
关键词：
Dispersion compensation; Lamb wave; Piezoelectric wafer active sensors; structural health monitoring; PWAS; SHM; PWAS phased array; SIGNAL-PROCESSING TECHNIQUE; REMOVE;
D O I：
10.1117/12.816085
中图分类号：
TP301 [理论、方法];
学科分类号：
081202 ;
摘要：
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.
引用
收藏
页数：12
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