Signal processing of magnetic flux leakage surface flaw inspect in pipeline steel

被引：19
|
作者：
Chen, Liang [1 ]
Li, Xunbo [1 ]
Qin, Guangxu [1 ]
Lu, Qiang [1 ]
机构：
[1] Univ Elect Sci & Technol China, Sch Mechatron Engn, Chengdu 610054, Peoples R China
来源：
RUSSIAN JOURNAL OF NONDESTRUCTIVE TESTING | 2008年 / 44卷 / 12期
关键词：
Nondestructive Test; Empirical Mode Decomposition; Axial Component; Intrinsic Mode Function; Magnetic Flux Leakage;
D O I：
10.1134/S1061830908120097
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
The magnetic flux leakage (MFL) method has established itself as the most widely used inline inspection technique for the evaluation of pipelines. The MFL signal is usually contaminated by various noise sources This paper presents the empirical mode decomposition (EMD) for enhancing signal-to-noise ratio. Experiments are conducted on the pipeline steel samples with different depth artificial defects. The MFL signal is decomposed into several intrinsic mode functions by EMD. Some modes are selected to reconstruct a new signal considering their frequencies and energy. The reconstructed signal has a better signal-to-noise ration. The results show that EMD technology is efficient in eliminating noise in the MFL signal.
引用
收藏
页码：859 / 867
页数：9
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