Application of Cross-Correlation in Pipe Condition Assessment and Leak Detection; Using Transient Pressure and Acoustic Waves

摘要

Leak detection and location in pipeline network is a major problem and has been the focus of water authorities for many years Application of cross-correlation of pressure transient and acoustic waves have been investigated in this research. For this purpose, the cross-correlation of acoustic waves measured at either sides of a leakage which are generated as a result of existence of that leakage in a pipeline system can provide us with an adequate source of data that gives the time delay of signals. Subsequently, it has been verified that the leakage can be located considering the time delay of signals and the acoustic wave speed. In addition, this research has also recognized pressure waves as an important source of data that can be used in conjunction with acoustic waves. Accordingly Cross-correlation of pressure transient waves has also been verified via numerical simulation and field experiments as an applicable technique in pipe condition assessment. Thus, it has been introduced as an innovative method and also paralleled with the previously recognized method; cross-correlation of acoustic wave in locating leakage or blockage in pipeline systems.