摘要
介绍采用射线方法检测多层电缆内各层介质的偏心情况时,不同信号分析方法的优缺点。其中小波变换法简便、快捷,但受测量噪声影响比较大。参数辨识方法具有计算精度高,辨识结果受测量噪声影响小的优点,有良好的工程应用前景。
Two algorithms for boundary detection of the media in multi-layer cable, named wavelet transform and parameter estimation are introduced. Wavelet transform is easy to use but seriously affected by noise. Parameter estimation is more accurate and less sensitive to noise. So it has a bright prospect in engineering practice.
出处
《无损检测》
北大核心
2005年第7期341-344,共4页
Nondestructive Testing
关键词
射线检测
多层电缆
信号处理
小波变换
参数辨识
偏移量
同心度
Radiographic testing
Multi-layer cable
Signal processing
Wavelet transform
Parameter estimation
Deviation
Concentricity
