Localization of acoustic-emission sources in objects with small geometric dimensions

被引：3

作者：

Stepanova, L. N. ^{[1
]}

Tenitilov, E. S. ^{[1
]}

机构：

[1] Siberian Transport Univ, Novosibirsk 630049, Russia

来源：

RUSSIAN JOURNAL OF NONDESTRUCTIVE TESTING | 2012年 / 48卷 / 11期

关键词：

acoustic emission; acoustic-emission transducer; piezoelectric antenna; localization; error; difference of times of arrival; velocity of sound; wavelet transformation; window transformation;

D O I：

10.1134/S106183091211006X

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

The problems of the localization of sources of acoustic-emission (AE) signals for objects with small geometric dimensions are considered. The dependence of the localization error for a flaw inside a piezoelectric antenna on the error in determining the difference in the times of signal arrival (DTA) at acoustic transducers was obtained. A method for determining the DTA using wavelet scalograms of AE signals was studied. Experimental studies showed the advantages of this method over the method for determining the rms deviation of AE-signal amplitudes within a "time window.".

引用

页码：662 / 671

页数：10

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