Noise analysis of digital ultrasonic system and elimination of pulse noise

被引：9

作者：

Chen, JZ ^{[1
]}

Shi, YW ^{[1
]}

Shi, S ^{[1
]}

机构：

[1] Xian Jiao Tong Univ, Sch Mech Engn, Xian, Peoples R China

来源：

INTERNATIONAL JOURNAL OF PRESSURE VESSELS AND PIPING | 1998年 / 75卷 / 12期

关键词：

ultrasonic testing; noise; pulse noise; digital signal processing; digital ultrasonic system;

D O I：

10.1016/S0308-0161(98)00091-X

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

the evaluation of a welded joint using a digital ultrasonic system, it is found that it is noise that constitutes the main difficulty in the detection of weak ultrasonic signals. In this work a physical model of a digital ultrasonic system is established and applied to analyze noises encountered in ultrasonic testing. An algorithm of extremum filtering is constructed to suppress the pulse noise. Experiment verifies that the algorithm is simple and efficient, and not only can it eliminate the pulse noise substantially, but it also retains the other components of the signal unchanged. (C) 1998 Elsevier Science Ltd. All rights reserved.

引用

页码：887 / 890

页数：4

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