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Ultrasonic flaw detection using EMD-based signal processing

高技术通讯（英文版）2006，Vol.12Issue(1)：14-17,4.

Ultrasonic flaw detection using EMD-based signal processing

作者信息

1. Institute of Automatic Detection, Shanghai Jiaotong University, Shanghai 200030, P.R. China;Institute of Automatic Detection, Shanghai Jiaotong University, Shanghai 200030, P.R. China
折叠

摘要

Abstract

The precise detection of flaw echoes buried in backscattering noise caused by material microstructure is a problem of great importance in ultrasonic non-destructive testing (NDT). In this work, empirical mode decomposition (EMD) is proposed to deal with ultrasonic signal. A time-frequency filtering method based on EMD is designed to suppress noise and enhance flaw signals. Simulated results are presented,showing that the proposed method has an excellent performance even for a very low signal-to-noise ratio(SNR). The improvement in flaw detection was experimentally verified using stainless steel pipe sample with artificial flaws.

关键词

empirical mode decomposition/ultrasonic NDT/time-frequency filtering

Key words

empirical mode decomposition/ultrasonic NDT/time-frequency filtering

分类

信息技术与安全科学

引用本文复制引用

..Ultrasonic flaw detection using EMD-based signal processing[J].高技术通讯（英文版）,2006,12(1):14-17,4.

基金项目

Supported by the High Technology Research and Development Programme of China (No. 2001AA602021 ). （No. 2001AA602021 ）

高技术通讯（英文版）

OAEI

ISSN：1006-6748

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