WANGHai-tao,GEQi,JIANGAn-hua,et al.Application of Hydrophone Infrasound Waves in Leak Detection of Large-diameter Water Supply Pipelines[J].China Water & Wastewater,2024,40(19):39-44.
水听器次声波在大口径供水管道探漏中的应用研究
- Title:
- Application of Hydrophone Infrasound Waves in Leak Detection of Large-diameter Water Supply Pipelines
- Keywords:
- water supply pipeline; leak detection; hydrophone; infrasound wave; feature analysis method; energy accumulation method; AI learning algorithms
- 摘要:
- 大口径供水管道由于高频振动噪声衰减快、埋地深、检查井间距大，人工听漏或使用噪声仪等常规手段无法奏效。针对此问题，通过对次声波水听器采集的不同大小漏点、不同外部介质、不同口径管道的模拟渗漏信号分析，发现大口径管道渗漏信号以低频分量为主，多为次声波成分；进一步运用特征值法、能量积累法及AI等分析方法，可以获得较好的检测效果。研究表明，应用水听器探漏，能及时发现远端漏点，弥补了常规手段对大口径供水管道探漏的短板，能够更好地保障城市供水系统的安全运行。
- Abstract:
- Due to the fast attenuation of high-frequency vibration noise, deep burial, and large spacing between inspection wells, conventional methods such as manual leak detection or noise logger cannot be effective for large-diameter water pipelines. In response to this issue, through the analysis of simulated leakage signals collected by infrasonic hydrophones with different leak sizes, external media at different leak points, and pipelines with different diameters, it was found that the leakage signals of large-diameter pipelines were mainly low-frequency components, mostly infrasonic components. Further application of analysis methods such as eigenvalue method, energy accumulation method, and AI could achieve good detection results. Research has shown that using hydrophones to detect leaks can timely detect remote leakage points, filling the gap of conventional methods for detecting leaks in large-diameter water supply pipelines and better ensuring the safe operation of urban water supply systems.
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