Resumo

TRUTIE-CARRERO, Eduardo; DELGADO-HERNANDEZ, Lázaro Ariel; GONZALEZ-ZAMORA, Calixto  e  RAMIREZ-BELTRAN, Jorge. Detection and location of background leakage in plastic water pipes under a noisy environment. EAC [online]. 2019, vol.40, n.3, pp. 1-15.  Epub 08-Set-2019. ISSN 1815-5928.

Detection and location of background leaks in water pipes is an issue of great importance for water distribution systems because this phenomenon is one of the events involved in the loss of this natural resource. This problem has led to great interest by the scientific community in developing procedures that improve the detection and location of the background leak, making for this measurements under a controlled environment. In practice, however, leakage signals coexist with white and colored noise. For this reason, this article proposes a new procedure for detecting and locating background leakage under a noisy environment. In order to carry out the detection, the coherence function was used and in the location a digital band-pass filter was used to apply the cross-correlation function in the frequency range where the best signal-to-noise ratio exists. To validate and compare the proposed procedure with those reported by the scientific community, MATLAB was used and 150 signals were acquired in the laboratory, which were divided into two groups. The first group presents 90 signals with the presence of background leakage and in the other group there is only noise. After finishing the analysis, the new procedure used showed an error of 2.1 % in the location of the background leak.

Palavras-chave : Background leaks; Coherence; Cross correlation; Detection; Noise.

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