基于金属磁记忆法的焊接缺陷特征值提取

英文篇名：Feature Extraction of Welding Defects Based on Metal Magnetic Memory
中文刊名：无损检测
英文刊名：Nondestructive Testing
作者：王进 ; 任吉林 ; 罗声彩 ; 胡智 ; 张路根 ; 刘伟成
英文作者：WANG Jin~1 ; REN Ji-Lin~1 ; LUO Sheng-Cai~1 ; HU Zhi~2 ; ZHANG Lu-Gen~2 ; LIU Wei-Cheng~21. Key Lab of Nondestructive Testing ; Ministry of Education ; Nanchang Hangkong University ; Nanchang 330063 ; China ; 2. Inspection and Research Institute of Boiler and Pressure of Jiangxi Province ; Nanchang 330029 ; China
中文关键词：金属磁记忆检测 ; 焊接缺陷 ; 小波包 ; 能量谱
英文关键词：Metal magnetic memory testing ; Welding defects ; Wavelet packet ; Energy spectrum
出版日期：2009-12-10
机构：南昌航空大学无损检测技术教育部重点实验室;江西省锅炉压力容器检验检测研究院;
年：2009
期：12
出版单位：无损检测

摘要

研究了磁记忆检测技术在焊缝检测中的应用情况。采集了有缺陷和无缺陷试件分别在无应力作用下和加栽后的磁记忆信号,并进行对比分析。以小波包变换为理论基础,对磁记忆信号进行小波包分解和小波包能量谱特征分析。试验证明,采用磁记忆信号的能量集中位置来判断缺陷的区域是可行的。
The application of metal magnetic memory testing (MMMT) in weld inspection was investigated. Through experiments,MMMT signals of two samples of being stress free and load imposed were gathered respectively,and comparative analysis was carried out On the theoretical basis of wavelet packet transform, MMMT signals were processed by wavelet packet decomposition and wavelet energy spectrum analysis. The feasibility of judging the area of defect by the position of energy concentration was proved.

引文

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