NDLI: Study on the Characteristics of the Leakage Acoustic Emission in Cast Iron Pipe by Experiment

Content Provider	IEEE Xplore Digital Library
Author	Zhang Jian-li Guo Wei-xing
Copyright Year	2011
Abstract	The correlator based on acoustic signals is widely used in leak detection and location in water distribution pipe. The accuracy of the localization results depend heavily on the signal-to-noise ratio (SNR) of the acoustic signals that used for calculation. But at present, the study on characteristics of leak acoustic emission in the cast iron pipe is insufficient. So in this paper, taken the cast iron pipe as the research object, several cases of acoustic emission phenomenon in the leaking pipe were studied by experiment in the municipal pipeline test bench. They are the different characteristic of the signals from the pipe with leakage and no-leakage, the different acoustic emission characteristics of the leakage in cast iron pipe under different hydraulic conditions, and some of the external interference to the acquisition of signals, etc. The experiment results show that the acoustic emission phenomenon of leakage in the pipe is very complex and the components of the frequencies in the leak noises are very rich. The autocorrelation of leak signals is poor, however the autocorrelation of the ambient noises is very strong. And the impact of different hydraulic conditions on amplitude is evident but the distribution of the spectrum is not obvious.
Starting Page	122
Ending Page	125
File Size	373203
Page Count	4
File Format	PDF
ISBN	9780769545196
DOI	10.1109/IMCCC.2011.39
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2011-10-21
Publisher Place	China
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Noise Orifices Cast iron Acoustic emission Time frequency analysis Autocorrelation Leak detection Joint time-frequency analysis
Content Type	Text
Resource Type	Article

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