Parameter and time delay estimation of ultrasonic multi-mode Lamb waves based on wavelet transform

被引：0
|
作者：
Xing, Hong-Yan [1 ]
Liu, Zhao-Quan [1 ]
Wan, Ming-Xi [1 ]
机构：
[1] Dept. of Biomedical Eng., Xi'an Jiaotong Univ., Xi'an 710049, China
来源：
Shengxue Xuebao/Acta Acustica | 2001年 / 26卷 / 03期
关键词：
D O I：
暂无
中图分类号：
O1 [数学];
学科分类号：
0701 ; 070101 ;
摘要：
This paper put forward using Wavelet Instantaneous Parameter Methods (WIPM) and the modulus maxima method of the Wavelet Transform (WTM), respectively, for time delay estimations of narrow-band and wide-band multi-mode (A0 and S0) Lamb waves. The methods are much higher resolution than Hilbert Instantaneous Parameter Methods (HIPM). WTM's resolution is the highest; WIPM's resolution is the second; and HIPM can not magnificently estimate the multi-mode time delay. As well as this paper puts forward the method of the reconstruction based on wavelet Transform modulus maxima to estimate attenuation coefficient of multi-mode ultrasonic Lamb wave A0 and S0. And the method indicated by experiment results is feasible for metal aluminum thin plate.
引用
收藏
页码：239 / 246
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