Journal of Northeastern University:Natural Science ›› 2013, Vol. 34 ›› Issue (1): 9-12.DOI: -

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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
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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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