基于EMD和相关分析的管道泄漏定位检测研究

针对长输管道泄漏检测与定位中噪声干扰问题,提出了一种基于EMD分解和相关分析的管道泄漏检测与定位方法.该方法利用EMD分解特性和相关分析技术,提取了包含故障信息的主要固有模态函数(IMF)分量,增强了泄漏信号的本质特征.通过对所提取的IMF主分量进行重构,消除了不相关分量的干扰,提高了泄漏信号的相关程度,从而提高了定位精度.实验验证了该方法的有效性.

Investigation of method for pipeline leak detection and location

With the problem of noise disturbance in leak detection and location of pipeline, a signal process method based on empirical mode decomposition (EMD) and cross-correlation was presented. Using EMD, the leak signal can be decomposed into a sum of finite intrinsic mode functions (IMF), among which some IMF components containing typical characteristic can be selected to reconstruct the signal, thus intrinsic characteristic of leak signal can be extracted and noise signal can be eliminated. So the accuracy of location was improved greatly. The result of investigation showed the effectiveness of the method.