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CSME 2020/06
Volume 41 No.3
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363-372
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Real-time Leak Localization of Pipeline by Acoustic Emission and Variational Mode Decomposition
Wei-Tang Lee a, Andy-Chit Tan a, Jing-Yuen Tey a and Faidz Abdul Rahman b
aDepartment of Mechanical & Material Engineering, Universiti Tunku Abdul Rahman, Selangor, Malaysia.
bDepartment of Electrical & Electronic Engineering, Universiti Tunku Abdul Rahman, Selangor, Malaysia.
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Abstract:
This paper proposes a real-time water pipeline leak detection system using acoustic emission (AE) signal and Variational Mode Decomposition (VMD) for accurate leak detection and localization. The leak generated AE signal is often masked by background noise presence in the pipeline, causing difficulty in locating leak. The leak information in the signal can be effectively extracted by VMD. However, this technique requires a lengthy processing time, which poses a challenge for real-time leak localization. To overcome this, the system incorporates a hit-based leak event recognition technique to capture the segment of signals that contain leak information so that only these small segments of data are needed to be processed as such it enables VMD to be implemented in real-time. In conjunction with VMD, a more reliable wave velocity selection technique is introduced to achieve a better accuracy in leak localization as compared to the traditional method.
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Keywords: acoustic emission, variational mode decomposition, leak detection, leak localization
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*Corresponding author; e-mail:
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©
2020
CSME , ISSN 0257-9731
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