| 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: | 13/50412-3 - Desenvolvimento de um correlacionador de sinais nacional otimizado para localização e detecção de vazamentos em dutos de água subterrâneos da SABESP, juntamente com dispositivos efetivos para o treinamento de equipes de detecção de vazamento |
| Grantee: | Michael John Brennan |
| Support Opportunities: | Research Grants - Research Partnership for Technological Innovation - PITE |
| 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 |