基于HHT变换和近似熵的管道泄漏检测方法  

Pipeline leakage detection method based on HHT and approximate entropy

作　　者：钟华[1] 邢懿鹏 丁颖铖 赵荣华 ZHONG Hua;XING Yipeng;DING Yingcheng;ZHAO Ronghua(School of Communication Engineering,Hangzhou Danzi University,Hangzhou Zhejiang 310018,China)

机构地区：[1]杭州电子科技大学通信工程学院,浙江杭州310018

出　　处：《杭州电子科技大学学报（自然科学版）》2022年第1期34-39,共6页Journal of Hangzhou Dianzi University：Natural Sciences

基　　金：国家自然科学基金资助项目(61301248);浙江省公益技术研究资助项目(LGG18F010009);浙江省教育厅一般科研资助项目(Y201942113)。

摘　　要：为了提高供水管泄漏检测准确率,提出一种基于希尔伯特黄变换(Hilbert-Huang Transform,HHT)与近似熵的管道泄漏检测方法。首先,对泄漏信号进行HHT处理,得到信号的Hilbert边际谱,从频率上将泄漏信号和噪声信号区分开;然后,将泄漏信号的Hilbert边际谱作为输入对象,求解有效频段内的近似熵,并将近似熵作为泄漏检测的判决对象。实验结果表明,提出方法的泄漏检测准确率达95%以上。To improve the accuracy of leakage detection of water supply pipe,a pipeline leakage detection method based on Hilbert-Huang Transform(HHT)and approximate entropy is proposed.Firstly,the Hilbert marginal spectrum of the leakage signal is obtained by HHT transform,the leakage signal and noise signal are distinguished from each other by frequency.Then,the Hilbert marginal spectrum of the leakage signal is taken as the input signal,the approximate entropy in the effective frequency band is computed and taken as the criterion of the leakage detection.Experimental results show that the accuracy of the proposed method is more than 95%.

关 键 词：希尔伯特黄变换(HHT) 近似熵 Hilbert边际谱 泄漏检测 

分 类 号：TU991.61[建筑科学—市政工程]