Journal of Mechanical Science and Technology

  • 제15권2호
  • /
  • Pages.232-238
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  • 2001
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  • 1738-494X(pISSN)
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  • 1976-3824(eISSN)
대한기계학회 (The Korean Society of Mechanical Engineers)
권호 표지

Detection of Leakage Point via Frequency Analysis of a Pipeline Flow

  • Kim, Sanghyun (Assistant Professor, Environmental Engineering, Pusan National University) ;
  • Wansuk Yoo (Professor, Mechanical Engineering, Pusan National University) ;
  • Injoon Kang (Professor, Civil Engineering, Pusan National University)
  • 발행 : 2001.02.01
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초록

Fast Fourier Transformation is employed to convert the head variation of a pipeline in the time domain to the amplitude of the frequency domain. Applying method of characteristics to a pipeline provides a significant frequency range for a surge introduced from the valve modulation. Inverse Fast Fourier Transformation and a Finite Impulse Response Filter can be used to remove any possible noise existing from the significant frequency range of an unsteady condition. A filtered signal shows higher potential for the inverse calculation of leakage detection than the noise-added signal does. The respective performances of Inverse Fast Fourier Transformation and a Finite Impulse Response Filter are compared in terms of leakage detection capability. Characteristics of the frequency range for multiple leakages were investigated to validate the effectiveness of the noise control method in the frequency domain.

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참고문헌

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