Work

Cross-spectral phase method for time delay estimation in acoustic leak detection

Year: 2025

Type: article

Abstract: In this paper, a method based on linear segmentation of the cross-spectral phase is proposed for estimating time delays between acoustic/vibration leak signals measured in water distribution systems. The method determines the time delay via linear regression of the cross-spectral phase while excluding non-linearities introduced by noise. A simple and fast approach is developed for automatically detecting linear segments in the cross-spectral phase. Experimental results demonstrate the capability of the method to accurately estimate time delays without first filtering the signals even in the presence of multiplicative noise that distorts the cross-spectral phase, in contrast with generalised cross-correlation and generalised phase spectrum methods. The proposed method provides a confidence interval that indicates the region where the leak is likely to be located, thereby improving the reliability of leak localisation.

Source: Applied Acoustics

DOI: 10.1016/j.apacoust.2025.110695

Authors: Ndubuisi Uchendu, Jennifer M. Muggleton, Paul R. White

Institution: University of Southampton

Language: English

Topic: Water Systems and Optimization

Subfield: Civil and Structural Engineering

Field: Engineering

Domain: Physical Sciences

Open Access status: hybrid

Estimated APC paid: $3,820

Funder: Petroleum Technology Development Fund