模糊提升小波在脉冲漏磁信号处理中的应用  

Applications of fuzzy lifting wavelet in PMFL signal processing

作　　者：费骏骉[1,2] 左宪章[1] 张云[1] 张韬[1] 

机构地区：[1]军械工程学院电气工程系 [2]77159部队

出　　处：《国外电子测量技术》2011年第8期35-38,65,共5页Foreign Electronic Measurement Technology

摘　　要：在脉冲漏磁检测中,有效抑制信号中的噪声是最终正确识别缺陷的关键环节之一。介绍了提升小波变换的基本理论及传统阈值降噪方法;针对传统硬、软阈值法的局限性,提出了包括带有可变因子的隶属函数的模糊阈值处理方法;运用该方法对仿真和实验信号进行了降噪研究。结果表明,采用模糊提升小波降噪方法能够很好的抑制脉冲漏磁信号中的噪声,在实时信号降噪方面具有很好的应用前景。Effectively inhibit the noise in signal is the key to correctly identify the defects in pulse magnetic flux leakage （PMFL） detection. The basic theory of lifting wavelet transform and the traditional thresholding method are introduced. The fuzzy thresholding method which including a membership function with a variable factor to deal with the limitations of traditional hard and soft threshold method are proposed. The method in simulation and experimental signal are researched. The results show that the fuzzy lifting wavelet denoising method can well inhibit the noise in pulsed magnetic flux leakage signal and has a good prospect in real-time signal denoising.

关 键 词：提升小波 模糊阈值处理 脉冲漏磁检测信号 降噪 

分 类 号：TN911.7[电子电信—通信与信息系统]