Hilbert-Huang变换在管道泄漏监测系统中的应用  

Application of Hilbert-Huang Transformation in pipeline leak detection system

作　　者：王洪超[1] 石志国[2] 许斌[1] 王立坤[1] 谭东杰[1] 余东亮[1] 熊敏[1] 

机构地区：[1]油气管道输送安全国家工程实验室·中国石油管道科技研究中心,河北廊坊065000 [2]中国石油管道公司西安输油气分公司,陕西西安710016

出　　处：《油气储运》2012年第1期20-22,82,共3页Oil & Gas Storage and Transportation

摘　　要：音波管道泄漏监测系统利用管道泄漏产生的音波信号进行泄漏报警定位。为了能够及时发现泄漏并准确定位,需要从管道的背景噪音中检测到音波信号的微弱瞬态变化以及音波传感器接收到信号瞬态变化的准确时刻。Hilbert-Huang变换作为一种时频分析算法,能够同时获得较高的频率分辨率和时间分辨率,利用该特性,选取兰成渝成品油管道进行模拟试验,使用Hilbert-Huang变换对泄漏音波信号进行处理,可以获得信号的时频分布图,分析信号每个时刻的频率特性,进而得到泄漏音波信号到达传感器的准确时刻,并据此计算泄漏点位置。The acoustic pipeline leak detection system locates the leak position of pipeline by acoustic signal generated by the leakage.In order to detect pipeline leakage quickly and locate the leakage position accurately,it is important to detect the weak transient change of acoustic signal and the moment that the signal propagates to the acoustic sensor.Hilbert-Huang Transformation,as a time-frequency algorithm,has high time-frequency resolution.Based on this property,choosing Lanzhoou-Chengdu-Chongqing Products Pipeline as a simulation objective,Hilbert-Huang Transformation is used to process the leakage acoustic signals to get the time-frequency representation.By means of this method,frequency characteristic at each moment is analyzed and the accurate time that leakage acoustic signals get to the sensor can be obtained,and then the leakage location can be determined by calculation.

关 键 词：Hilbert-Huang 变换 音波信号 长输管道 泄漏监测 定位 

分 类 号：TE88[石油与天然气工程—油气储运工程]