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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.)

Using a geophone as an actuator to estimate the velocity of leak noise propagation in buried water pipes

Full text
Author(s):
Almeida, F. C. L. [1, 2] ; Brennan, M. J. [3] ; de Lima, F. Kroll [3] ; Iwanaga, M. K. [3] ; Scussel, O. [3]
Total Authors: 5
Affiliation:
[1] Sao Paulo State Univ Unesp, Fac Sci & Engn FCE, Dept Biosyst Engn, BR-17602496 Tupa, SP - Brazil
[2] Sao Paulo State Univ Unesp, Sch Engn FEB, Dept Mech Engn, BR-17033360 Bauru, SP - Brazil
[3] Sao Paulo State Univ Unesp, Fac Engn FEIS, Dept Mech Engn, BR-15385000 Ilha Solteira, SP - Brazil
Total Affiliations: 3
Document type: Journal article
Source: APPLIED ACOUSTICS; v. 184, DEC 15 2021.
Web of Science Citations: 0
Abstract

A common way to pinpoint a leak in a buried plastic water pipe is to use a leak noise correlator. This is performed by using the time delay between two measured signals and the velocity at which such signals travel along the pipe. In this paper, an investigation is carried out into the use of a geophone in reverse, driven by an oscillating voltage. It then acts as a tapping device, exciting the wave responsible for leak noise propagation, when it is attached to an access point to estimate leak noise velocity. Two different ways of exciting the geophone were investigated. Initial tests were conducted in the laboratory to determine the effectiveness of the device in generating a force over a wide frequency range. Field tests were then carried out on a buried pipe test rig and the predominantly fluid-borne wave was generated by the tapping device, that travelled at least 7 m. (C) 2021 Elsevier Ltd. All rights reserved. (AU)

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
FAPESP's process: 16/01733-0 - An investigation into the characteristics of leak noise signals in pipes from buried in São Paulo, and the development of a system to measure the speed of noise propagation
Grantee:Fábio Kroll de Lima
Support Opportunities: Scholarships in Brazil - Doctorate
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