基于EEMD的负压波法管道泄漏定位信号降噪

Pipeline Leakage Location Signal Denoising Using Negative Pressure Wave Method Based on EEMD

针对输油管道负压波法泄漏检测噪声干扰大,定位误差大的问题,提出了一种适合负压波泄漏定位降噪的方法。这种降噪方法在原有的经验模态分解基础上加入了白噪声,并运用了集合平均经验模态分解算法,改进了模态混叠现象。根据降噪后的数据进行负压波定位提高了精度,利用现场数据对比未降噪后的信号结果表明:该方法能够有效滤除噪声,提高信号的信噪比,使得负压波法泄漏定位精度提高。

Due to the problems of large noise In order to solve the problems of large interference and positioning error in detecting oil pipeline leakage by negative pressure wave method,a noise reduction method suitable for leakage positioning by negative pressure wave method is proposed.In this method,white noise is added to the original signal,and integrated average empirical mode decomposition algorithm is used to improve the mode aliasin。The localization of negative pressure wave based on denoised data can improve the accuracy,and the comparison of the field data with the signals without denoising shows that the method can effectively filter out the noise,improve the signal-to-noise ratio of the signals,and improve the accuracy of the negative pressure wave leakage localization.