小波变换在管道泄漏在线监测中去噪的应用

摘要

This paper firstly introduces the principle of the wavelet transform and the relationship between the wavelet function and scale function. The wavelet max modular method is given. Furthermore advantage of the wavelet max modular is taken to analyze the information induced by the pipeline leakage. The result shows the wavelet max modular method is more efficient than other traditional signal analysis methods.%对小波变换的基本理论进行了简要的阐述， 并提出了利用小波变换模极大值消除工程背景噪声的方法，给出了小波变换模极大值的算法 。最后本文将小波分析方法与波动法结合起来应用到管道泄漏的在线监测中，实验结果证明 了该方法可以有效地提高波动法对管道泄漏诊断的精度，显示了小波变换对信号的去噪声、 滤波以及定位等方面具有广泛的应用前景。