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首页> 外文会议>2010 American Water Works Association annual conference amp; exposition (ACE10) >In-pipe Acoustic Characterization of Leak Signals in Plastic Water-filled Pipes
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In-pipe Acoustic Characterization of Leak Signals in Plastic Water-filled Pipes

机译：塑料充水管泄漏信号的管内声学特性

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Acoustic emissions can be sensed to identify and localize leaks in water pipes. Leak noiserncorrelators and listening devices have been reported in literature as successful approachesrnto leak detection but they have practical limitations in terms of cost, sensitivity, reliabilityrnand scalability. A possible efficient solution is the development of an in-pipe travelingrnleak detection system. It has been reported that in-pipe sensing is more accurate andrnefficient since the sensing element can be very close to the sound source. Currently inpipernapproaches are limited to large leaks and larger diameter pipes.rnDevelopment of such a system requires clear understanding of acoustic signalsrngenerated from leaks and their variation with different pipe loading conditions, leak sizesrnand surrounding media. This paper discusses the acoustic characterization of leak signalsrnin controlled environments. A lab experimental setup was designed and built in whichrnmeasurements were taken from inside 4? PVC water pipes using a hydrophone. Signalsrnwere collected for a wide range of conditions: different pressures and leak flow rates tornbetter understand the leak signal signatures. Experiments were conducted with differentrnpipe connecting elements like valves and junctions, and different external conditions suchrnas pipes placed in water, air and soil. Signals were collected at various distances from thernleak location (upstream and downstream) to understand the opportunities of spatial crosscorrelationrntechniques in localizing leaks and the effect of sensor position on the signal.rnCharacterizations of different datasets are presented in frequency domain. Thernimplications of acoustic characterization on the design of algorithms for leak detectionrnare discussed and a simple algorithm to decide whether or not a leak is present near thernsensor location is proposed, based on signal power calculations. The characterizationrngives insights, which will pave ways for the development of smart, autonomous pipetraversingrnsystems capable of detecting and localizing leaks on a city level waterrndistribution network.
机译：可以感觉到声发射，以识别和定位水管中的泄漏。文献中已经报道了泄漏噪声相关器和监听设备是成功进行泄漏检测的方法，但是它们在成本，灵敏度，可靠性和可伸缩性方面存在实际限制。可能的有效解决方案是开发管道内泄漏检测系统。据报道，由于感测元件可以非常靠近声源，因此管道内感测更加准确且效率低下。当前，管道方法仅限于大泄漏和大直径管道。这种系统的开发需要清楚地了解由泄漏产生的声信号及其在不同的管道负载条件，泄漏尺寸和周围介质中的变化。本文讨论了在受控环境中泄漏信号的声学特性。设计并建立了一个实验室实验装置，其中从4个内部进行了哪些测量？使用水听器的PVC水管。收集了各种条件的信号：不同的压力和泄漏流量，更好地了解了泄漏信号的特征。使用不同的管道连接元件（如阀门和接头）以及不同的外部条件（如放置在水，空气和土壤中的管道）进行了实验。在距泄漏位置（上游和下游）不同距离处收集信号，以了解空间互相关技术在定位泄漏中的机会以及传感器位置对信号的影响。rn在频域中表示了不同数据集的特征。讨论了声学表征对检漏算法设计的影响，并基于信号功率计算，提出了一种简单的算法来确定传感器位置附近是否存在泄漏。特征化的见解，将为开发能够在城市级供水网络上检测和定位泄漏的智能，自主的管道穿越系统铺平道路。

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