The effects of resonances on time delay estimation for water leak detection in plastic pipes

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dc.contributor.authorAlmeida, Fabrício C.L. [UNESP]
dc.contributor.authorBrennan, Michael J. [UNESP]
dc.contributor.authorJoseph, Phillip F.
dc.contributor.authorGao, Yan
dc.contributor.authorPaschoalini, Amarildo T. [UNESP]
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.contributor.institutionUniversity of Southampton
dc.contributor.institutionChinese Academy of Sciences
dc.date.accessioned2018-12-11T17:16:02Z
dc.date.available2018-12-11T17:16:02Z
dc.date.issued2018-04-28
dc.description.abstractIn the use of acoustic correlation methods for water leak detection, sensors are placed at pipe access points either side of a suspected leak, and the peak in the cross-correlation function of the measured signals gives the time difference (delay) between the arrival times of the leak noise at the sensors. Combining this information with the speed at which the leak noise propagates along the pipe, gives an estimate for the location of the leak with respect to one of the measurement positions. It is possible for the structural dynamics of the pipe system to corrupt the time delay estimate, which results in the leak being incorrectly located. In this paper, data from test-rigs in the United Kingdom and Canada are used to demonstrate this phenomenon, and analytical models of resonators are coupled with a pipe model to replicate the experimental results. The model is then used to investigate which of the two commonly used correlation algorithms, the Basic Cross-Correlation (BCC) function or the Phase Transform (PHAT), is more robust to the undesirable structural dynamics of the pipe system. It is found that time delay estimation is highly sensitive to the frequency bandwidth over which the analysis is conducted. Moreover, it is found that the PHAT is particularly sensitive to the presence of resonances and can give an incorrect time delay estimate, whereas the BCC function is found to be much more robust, giving a consistently accurate time delay estimate for a range of dynamic conditions.en
dc.description.affiliationDepartment of Biosystem Eng. State University of São Paulo (UNESP), Tupã Campus, Av. Rua Domingos da Costa Lopes, Jardim Itaipu, 780
dc.description.affiliationDepartment of Mechanical Eng. State University of São Paulo (UNESP), Ilha Solteira Campus, Av. Brasil Centro, 56
dc.description.affiliationInstitute of Sound and Vibration Research (ISVR) Faculty of Engineering and the Environment University of Southampton, University Road
dc.description.affiliationKey laboratory of Noise and Vibration Research Institute of Acoustics Chinese Academy of Sciences
dc.description.affiliationUnespDepartment of Biosystem Eng. State University of São Paulo (UNESP), Tupã Campus, Av. Rua Domingos da Costa Lopes, Jardim Itaipu, 780
dc.description.affiliationUnespDepartment of Mechanical Eng. State University of São Paulo (UNESP), Ilha Solteira Campus, Av. Brasil Centro, 56
dc.description.sponsorshipFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
dc.description.sponsorshipIdFAPESP: 2013/50412-3
dc.format.extent315-329
dc.identifierhttp://dx.doi.org/10.1016/j.jsv.2017.06.025
dc.identifier.citationJournal of Sound and Vibration, v. 420, p. 315-329.
dc.identifier.doi10.1016/j.jsv.2017.06.025
dc.identifier.issn1095-8568
dc.identifier.issn0022-460X
dc.identifier.scopus2-s2.0-85034110727
dc.identifier.urihttp://hdl.handle.net/11449/175495
dc.language.isoeng
dc.relation.ispartofJournal of Sound and Vibration
dc.relation.ispartofsjr1,360
dc.rights.accessRightsAcesso restrito
dc.sourceScopus
dc.subjectCross-correlation
dc.subjectLeak detection
dc.subjectResonance
dc.subjectTime delay estimation
dc.subjectWater pipes
dc.titleThe effects of resonances on time delay estimation for water leak detection in plastic pipesen
dc.typeArtigo
unesp.author.lattes8272223904033177[5]
unesp.author.orcid0000-0003-1887-2678[5]

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