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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

A laboratory-based leak noise simulator for buried water pipes

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Author(s):
Iwanaga, M. K. [1] ; Brennan, M. J. [1] ; Almeida, F. C. L. [2, 3] ; Scussel, O. [1] ; Cezar, S. O. [3]
Total Authors: 5
Affiliation:
[1] UNESP FEIS, Dept Mech Engn, BR-15385000 Ilha Solteira, SP - Brazil
[2] UNESP FCE, Fac Sci & Engn, BR-17602496 Tupa, SP - Brazil
[3] UNESP FEB, Dept Mech Engn, BR-17033360 Bauru, SP - Brazil
Total Affiliations: 3
Document type: Journal article
Source: APPLIED ACOUSTICS; v. 185, JAN 1 2022.
Web of Science Citations: 0
Abstract

Acoustic correlators are often used to pinpoint leaks in water distribution systems. Generally, these devices are tested for their efficacy in bespoke test rigs that are also used for training purposes. However, this can be problematic as it is difficult to expose the correlators to identical conditions, and only a limited number of situations is possible. An alternative approach is described in this paper, in which a bench-top device, called a leak noise simulator (LNS), is used to generate pipe vibration representative of measured leak noise. The LNS comprises a computer to generate and supply the signals, a dual channel power amplifier and two electrodynamic shakers and accelerometers to generate and measure the vibrations. There are two modes of operation. One involves the generation of leak noise signals using a theoretical model of the buried water pipe implemented in the computer, and the other replicates measured signals from the field that are stored in the computer. To faithfully replicate the pipe vibration due to leak noise, the dynamic effects of the power amplifier and shakers are compensated for by using a filter implemented in the computer. The design and testing of the LNS in both modes are reported in detail, demonstrating the potential of the device. (C) 2021 Elsevier Ltd. All rights reserved. (AU)

FAPESP's process: 17/16953-8 - Development of a virtual PIPE test rig for testing acoustic correlators for leak detection in buried water pipes
Grantee:Mauricio Kiotsune Iwanaga
Support Opportunities: Scholarships in Brazil - Master
FAPESP's process: 17/14432-0 - Analysis of sensors and different excitation mechanisms in locating and detecting leaks in buried water distribution pipes
Grantee:Oscar Scussel
Support Opportunities: Scholarships in Brazil - Post-Doctoral