| 基于小波变换的低碳钢连铸坯超声探伤 |
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| 引用本文： | 吴楠,张海澜,林伟军,张国星.基于小波变换的低碳钢连铸坯超声探伤[J].声学技术,2006,25(4):299-303. |
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| 作者姓名： | 吴楠 张海澜 林伟军 张国星 |
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| 作者单位： | 1. 中国科学院声学研究所,北京,100080
2. 宝山钢铁股份有限公司,上海,201900 |
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| 摘 要： | 利用离散小波变换对粗晶钢材超声检测信号进行处理,比较了使用不同的小波基,并对不同尺度中突出体现的信息分别进行处理后重构信号的去噪效果。结果表明,对不同尺度系数作不同的阈值处理有利于缺陷的识别,这种方法对粗晶钢材料的检测有积极的意义。
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| 关 键 词： | 粗晶材料 超声检测 小波变换 |
| 文章编号： | 1000-3630（2006）-04-0299-05 |
| 收稿时间： | 2005-06-17 |
| 修稿时间： | 2005-06-172005-09-05 |
Ultrasonic detection of coarse-grained mild steel using wavelets |
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| WU Nan,ZHANG Hai-lan,LIN Wei-jun and ZHANG Guo-xing.Ultrasonic detection of coarse-grained mild steel using wavelets[J].Technical Acoustics,2006,25(4):299-303. |
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| Authors: | WU Nan ZHANG Hai-lan LIN Wei-jun and ZHANG Guo-xing |
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| Affiliation: | Institute of Acoustics, Chinese Academy of Sciences, Beijing 100080;Institute of Acoustics, Chinese Academy of Sciences, Beijing 100080;Institute of Acoustics, Chinese Academy of Sciences, Beijing 100080;Baoshan Iron & Steel Company Limited, Shanghai 201900, China |
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| Abstract: | This paper deals with ultrasonic detection of signals from coarse-grained mild steel with defects,and processing of the signals with discrete wavelet transform.Differences in the noise reduction in the reconstructed signals by using different mother wavelets and scales are studied.The results show that the discussed method is effective,and the defects are easier to detect with a changing threshold for different scales. |
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| Keywords: | coarse-grained material ultrasonic detection wavelet transform |
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