阀门内漏声发射检测信号特征研究  

Research on the Acoustic Emission Signal Feature for the Inner Leakage of Valves

作　　者：刘治超[1] 张悠江 

机构地区：[1]中国石油大学(北京)机械与储运工程学院,北京102249

出　　处：《石油矿场机械》2015年第6期13-16,共4页Oil Field Equipment

摘　　要：阀门在天然气管道运输中具有重要的作用,阀门内漏会给天然气管道运输造成安全隐患。采集阀门内漏的声发射信号,采用改进的小波阈值去噪方法对采集的信号进行降噪处理,提高信号的信噪比,进而提取降噪后信号的频域峰值和峰值频率,探究阀门内漏的信号特征,为阀门内漏检测提供参考。Valves have an important role in the transport of natural gas,and the safety operation of gas pipelines is threatened by valve inner leakage.The acoustic emission signals are collected,and the improved threshold de-noising algorithm is applied to signal analysis,in order to improve the signal-to-noise-ratio,and decrease the root-mean-square-error （RMSE）value.Then,the frequency domain peak and peak frequency of the de-noising signal are extracted to research the acoustic e-mission signal feature for the inner leakage of valve and lay the foundation for the valve leak de-tection.

关 键 词：声发射 小波阈值 信噪比 均方根误差值 频谱特征 

分 类 号：TE973[石油与天然气工程—石油机械设备]