Eventos Anais de eventos
DINAME2019
DINAME2019
Phenomenological models to investigate phase characteristics of pipe and ground vibration due to leak noise excitation in buried water pipes
Submission Author:
Fabricio Cesar Lobato de Almeida , SP
Co-Authors:
Fabricio Cesar Lobato de Almeida, Michael Brennan, Oscar Scussel
Presenter: Fabricio Cesar Lobato de Almeida
doi://10.26678/ABCM.DINAME2019.DIN2019-0140
Abstract
Old water metallic pipes have been replaced by plastic ones in many current pipe network systems. This has been done to reduce water wastage due to the deterioration of metallic pipe systems. However, plastic pipes are still susceptible to leakage, and potable water which is a scarce source, is lost, increasing the cost of water treatment and pumping, as well as affecting the environment. Acoustic techniques are widely used to detect leaks in buried pipes. They can be deployed by placing sensors on the pipe, such as using the cross-correlation technique or can be carried out by measuring the ground vibration caused by the presence of a leak by using geophones. Reflections, wave interactions and the system dynamics, however, can jeopardize the use of such techniques. This paper investigates the use of phenomenological models based on wave theory to understand the effects that such features can cause in the measured phase. The phase gradient is used to estimate the time delay, which is used to calculate the leak location, so that, if it is affected, then the estimation is compromised
Keywords
Leak, buried pipe, Wave model, Phase behaviour
