Abstract
Inspection and preservation of buried water pipelines is of importance in the modern world. The wastage of water due to leaks is a global problem and existing technologies/methods to detect leaks in buried pipelines still face challenges, such as how to predict the bandwidth of measured leak noise using acoustic correlators, and what are the main factors affecting this frequency range. The leak noise bandwidth is useful information for operators to know before carrying out tests in the field, and currently there is no practical way of predicting this frequency range. This paper presents an approach to predict the bandwidth and investigates the main factors affecting it such as the distance between the sensors, wave speed and attenuation of the fluid-dominated wave, which is the main carrier of leak noise. To achieve this, a water-pipe-soil-sensor model is represented in terms of filters, allowing an investigation into the corresponding physical/geometric characteristics that affect the bandwidth of the measured leak noise. It is shown that the dominant factors are the material and geometry of the pipe, the properties of the surrounding soil and the type of transducer used.
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Acknowledgments
The authors are grateful for the financial support provided by the Engineering and Physical Sciences Research Council (EPSRC) under reference EP/V028111/1, entitled RAINDROP: tRansforming Acoustic SensINg for leak detection in trunk mains and water DistRibutiOn Pipelines. The authors also would like to thank the São Paulo Research Foundation (FAPESP) under Grant numbers 2018/25360–3 and 2019/00745–2. Oscar Scussel is grateful for the support from Coordination for the Improvement of Higher Education Personnel (CAPES) under Grant number 88887.374001/2019–00. The authors also thank the Brazilian water and waste management company (Sabesp) for part-funding this work and for providing one of the test rigs, and Osama Hunaidi from the National Research Council of Canada who provided the test data for the Ottawa test rig.
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Scussel, O. et al. (2023). An Investigation into the Factors Affecting the Bandwidth of Measured Leak Noise in Buried Plastic Water Pipes. In: Dimitrovová, Z., Biswas, P., Gonçalves, R., Silva, T. (eds) Recent Trends in Wave Mechanics and Vibrations. WMVC 2022. Mechanisms and Machine Science, vol 125. Springer, Cham. https://doi.org/10.1007/978-3-031-15758-5_106
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DOI: https://doi.org/10.1007/978-3-031-15758-5_106
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