| 小波分析在管道缺陷超声检测中的应用 |
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| 引用本文： | 黄晶 阙沛文. 小波分析在管道缺陷超声检测中的应用[J]. 传感技术学报, 2003, 16(3): 263-266 |
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| 作者姓名： | 黄晶 阙沛文 |
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| 作者单位： | 上海交通大学自动检测研究所,上海,200030 |
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| 基金项目： | 国家 8 6 3计划资助项目 ( 2 0 0 1AA6 0 2 0 2 1) |
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| 摘 要： | 在管道缺陷超声无损检测中，作为检测基本数据的脉冲反射回波信号受到电子噪声(包括热噪声和量化噪声)和结构噪声的干扰，使材料的缺陷信号变得难以识别。小波变换借助于时．频局部分析特性，已成为现代信号处理中的一种重要方法。在阐述小波变换基本原理的基础上，研究了管道超声缺陷信号的小波分解与重构。利用此方法对超声信号进行分析，可方便地识别是否存在缺陷以及缺陷的位置。
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| 关 键 词： | 缺陷检测 超声无损检测 小波变换 石油天然气管道 |
| 文章编号： | 1004-1699(2003)03-0263-04 |
| 修稿时间： | 2003-04-15 |
The Application of Wavelet Analysis in Ultrasonic Testing of Pipeline Defect |
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| HUANG Jing,QUE Peiwen. The Application of Wavelet Analysis in Ultrasonic Testing of Pipeline Defect[J]. Journal of Transduction Technology, 2003, 16(3): 263-266 |
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| Authors: | HUANG Jing QUE Peiwen |
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| Abstract: | In ultrasonic nondestructive testing of pipeline defect, the echo signal of pulse reflection, which is used as a basic testing data, is disturbed by electronic noise (including thermal noise and digitalization noise), and structure noise. It is difficult to identify the ultrasonic defect signal. In virtue of the time frequency analyzing characteristic, wavelet transform has been used as an important method of modern signal processing. Based on the basic principles of wavelet transform, the decomposition and recomposition of ultrasonic signals about pipeline defect is analyzed. The experimental results show that the SNR can be improved highly by this method. It is convenient to identify whether there are defect and the location of the defect. |
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| Keywords: | wavelet transform pipeline defect ultrasonic wave nondestructive testing |
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