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State of Research on Negative Pressure Wave Techniques Applied to Leak Detection in Liquid Pipelines

2004; Linguagem: Inglês

Zhaohui Wang,

Geotechnical Engineering and Underground Structures

The negative pressure wave techniques are widely used in China to diagnose the leakage in liquid pipelines.Many assumptive and uncertain factors are often involved in the process of leak detection,which can easily result in errors,even if only one of the factors is not correctly assumed or known.Thus the negative pressure wave techniques should be integrated with other dating techniques to drive a more accurate leak location.Additionally,the development trends of negative pressure wave techniques are as follows:First,negative pressure wave detection techniques will be integrated with other compatible detection techniques and modern signal processing methods to solve the complex problems encountered in leak detection.Second,studies of negative pressure wave techniques have advanced to a new stage.The deductions on propagation mechanism of negative pressure wave have been successfully applied to determine leaks qualitatively.Third,analysis on negative pressure wave detection techniques will be made from a quantitative point of view.The quantitative data have been used to deduce leak amounts and location.