石油矿场机械
石油礦場機械
석유광장궤계
OIL FIELD EQUIPMENT
2015年
6期
13-16
,共4页
声发射%小波阈值%信噪比%均方根误差值%频谱特征
聲髮射%小波閾值%信譟比%均方根誤差值%頻譜特徵
성발사%소파역치%신조비%균방근오차치%빈보특정
acoustic emission%threshold de-noising algorithm%signal-to-noise-ratio%RMSE%sp ectral characteristics
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。
閥門在天然氣管道運輸中具有重要的作用，閥門內漏會給天然氣管道運輸造成安全隱患。採集閥門內漏的聲髮射信號，採用改進的小波閾值去譟方法對採集的信號進行降譟處理，提高信號的信譟比，進而提取降譟後信號的頻域峰值和峰值頻率，探究閥門內漏的信號特徵，為閥門內漏檢測提供參攷。
벌문재천연기관도운수중구유중요적작용，벌문내루회급천연기관도운수조성안전은환。채집벌문내루적성발사신호，채용개진적소파역치거조방법대채집적신호진행강조처리，제고신호적신조비，진이제취강조후신호적빈역봉치화봉치빈솔，탐구벌문내루적신호특정，위벌문내루검측제공삼고。
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.
