东北大学学报:自然科学版 ›› 2013, Vol. 34 ›› Issue (1): 9-12.DOI: -

• 论著 • 上一篇    下一篇

流体管道压力信号的高精度实时滤波方法

刘金海,冯健,马大中   

  1. (东北大学信息科学与工程学院,辽宁沈阳110819)
  • 收稿日期:2012-04-19 修回日期:2012-04-19 出版日期:2013-01-15 发布日期:2013-01-26
  • 通讯作者: 刘金海
  • 作者简介:刘金海(1979-),男,吉林德惠人,东北大学副教授;冯健(1971-),男,辽宁锦州人,东北大学教授.
  • 基金资助:
    国家自然科学基金资助项目(61104021,61203086);国家高技术研究发展计划项目(2012AA040104);中央高校基本科研业务费专项资金资助项目(N100304007).

A High Accurate and Real Time Filter Method for Pressure Signal of Fluid Pipeline

LIU Jin-hai, FENG Jian, MA Da-zhong   

  1. School of Information Science & Engineering, Northeastern University, Shenyang 110819, China.
  • Received:2012-04-19 Revised:2012-04-19 Online:2013-01-15 Published:2013-01-26
  • Contact: LIU Jin-hai
  • About author:-
  • Supported by:
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摘要: 针对流体管道压力数据的特征,设计了管道泄漏实时高精度检测与定位的压力信号采集方法;在此基础上基于对压力信号的分析,设计了一种压力数据高精度实时组合滤波方法,分别应用低通滤波、陷波滤波和小波滤波对压力信号进行实时滤波处理,并给出了滤波方法中每个步骤的选择依据,以及参数选择方法.该滤波方法在滤掉压力信号中噪声的同时,较好地保留了压力变化的幅值和相位信息,从而有效提高泄漏定位精度.通过流体管道试验仿真系统和实际管道数据的仿真验证和试验,证明了该滤波方法的有效性.

关键词: 故障诊断, 组合滤波, 实时滤波, 陷波滤波, 小波

Abstract: A sampling frequency was designed according to the analysis of pressure signal for the purpose of leak detection of fluid pipeline.A united filter method including low-pass filter, notch filter and wavelet filter was proposed, and then the detailed implementary steps and parameters of the united filters were given.The united filters could filter the noise in pressure signal and recover the amplitude and phase of abnormal pressure which could improve the accuracy of leak detection effectively.At last, two cases were used to verify the united filters, and the results showed that the proposed filter method is effective.

Key words: fault diagnosis, united filter, real time filter, notch filter, wavelet filter

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