Optimal frequency-to-bandwidth ratio of wavelet in ultrasonic non-destructive evaluation

被引：26

作者：

Zhang, GM ^{[1
]}

Hou, CG

Wang, YW

Zhang, SY

机构：

[1] Nanjing Univ, Inst Acoust, Lab Modern Acoust, Nanjing 210093, Peoples R China

[2] Xian Jiao Tong Univ, Dept Engn Mech, Xian 710049, Peoples R China

来源：

ULTRASONICS | 2001年 / 39卷 / 01期

关键词：

ultrasonic non-destructive evaluation; wavelet transform; frequency-to-bandwidth ratio; parameter optimization;

D O I：

10.1016/S0041-624X(00)00043-3

中图分类号：

O42 [声学];

学科分类号：

070206 ; 082403 ;

摘要：

The wavelet transform is the most recent technique for processing signals with time-varying spectra. The frequency-to-bandwidth ratio of wavelet is an important factor for getting success in the practical applications of the technique. In this paper, a theoretical model is presented to estimate the optimal frequency-to-bandwidth of the Gaussian wavelet in ultrasonic non-destructive evaluation. Then the experimental verification is performed, and the experimental results confirm the availability of the theoretical model. (C) 2001 Elsevier Science B.V. All rights reserved.

引用

页码：13 / 17

页数：5

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