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

• Grant number: 16/01733-0
• Support Opportunities: Scholarships in Brazil - Doctorate
• Start date: April 01, 2016
• End date: February 28, 2019
• Field of knowledge: Engineering - Mechanical Engineering - Mechanics of Solids
• Agreement: SABESP
• Principal Investigator: Michael John Brennan
• Grantee: Fábio Kroll de Lima
• Host Institution: Faculdade de Engenharia (FEIS). Universidade Estadual Paulista (UNESP). Campus de Ilha Solteira. Ilha Solteira , SP, Brazil
• Company: Universidade Estadual Paulista (UNESP). Campus de Ilha Solteira. Faculdade de Engenharia (FEIS)

Abstract

Vibro-acoustic leak signals vary from case to case depending mainly on the type of pipe used, intensity of leakage and dynamic characteristics of the measuring points. Moreover, resonances related to the water distribution system may cause errors when taken into account in calculating the estimated position of the leak. Another important factor in the correct location of the leak is the estimate of their speed of propagation of the wave. This project has three main goals. The first aims to characterize typical plastic pipes in Brazil to obtain the frequency range in which the energy of the leak is contained, the rate of attenuation of leak noise as it propagates through the pipe. The second objective is to investigate the feasibility of measuring the speed of leak noise propagation in-situ. A prototype of a sensor-actuator device will developed and tested in the laboratory and the field, and its sensitivity to different points of attachment will be determined. The ultimate aim is to embed the new system in a new prototype correlator which will be tested in the field. (AU)

Scientific publications

(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)

ALMEIDA, F. C. L.; BRENNAN, M. J.; DE LIMA, F. KROLL; IWANAGA, M. K.; SCUSSEL, O.. Using a geophone as an actuator to estimate the velocity of leak noise propagation in buried water pipes. APPLIED ACOUSTICS, v. 184, DEC 15 2021. (17/14432-0, 16/01733-0, 17/16953-8)

Academic Publications

(References retrieved automatically from State of São Paulo Research Institutions)

LIMA, Fábio Kroll de. Measurement of the leakage wave-speed in an underground water pipe system. 2019. Doctoral Thesis - Universidade Estadual Paulista (Unesp). Faculdade de Engenharia. Ilha Solteira Ilha Solteira.