小波变换及其在无损检测中的应用
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摘要
介绍小波变换的基本概念和特性。用小波变换对钢丝绳断丝检测信号和岩体超声波检测信号进行的时频分析和处理。实验结果表明,该法是分析处理具有时变谱特性的非平稳信号的一种有效方法。
Concept and characteristics of wavelet transform is described. It is used to make time-frequency analysis and processing of the signals from both the broken wires in a steel rope and rock ultrasonic testing. Experiments show that the technique is effective for processing unstable signals of time-variation spectra.
Concept and characteristics of wavelet transform is described. It is used to make time-frequency analysis and processing of the signals from both the broken wires in a steel rope and rock ultrasonic testing. Experiments show that the technique is effective for processing unstable signals of time-variation spectra.
引文
1 Daubechies I. The wavelet transform, time-frequency localization and signal analysis. IEEE Trans (Information Theory), 1990,36:961--1004
2 张晓春等.矿山岩体超声波实测技术的研究.国际煤炭技术学术研讨会论文集,黑龙江科学技术出版社.1993.
3 Mauats. A theory for multiresolution signal decomposition: the wavelet representation. IEEE Trans (Patern Anal Machine Intell),1989,31:674--693
4 张晓春.电磁法检测钢丝绳断丝.大学物理学.学苑出版社,1993.
5 余厚全等.小波变换用于地震测井信号的多分辨力分析.石油地球物理勘探,1994,29(4):441—448
2 张晓春等.矿山岩体超声波实测技术的研究.国际煤炭技术学术研讨会论文集,黑龙江科学技术出版社.1993.
3 Mauats. A theory for multiresolution signal decomposition: the wavelet representation. IEEE Trans (Patern Anal Machine Intell),1989,31:674--693
4 张晓春.电磁法检测钢丝绳断丝.大学物理学.学苑出版社,1993.
5 余厚全等.小波变换用于地震测井信号的多分辨力分析.石油地球物理勘探,1994,29(4):441—448
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