Abstract
When locating the position of pipeline leaks with the traditional negative pressure wave method (NPW), the inflection point of the sudden change of the pressure signal must be accurately obtained. If the inflection point cannot be obtained, it is impossible to locate leaks with time difference. To overcome the shortcomings of NPW, a method of leak localization for pipeline based on fusion signal is proposed. By deriving the motion equation and the continuity equation, the leak localization method for the fusion of pressure and flow signals is established. The proposed method depend on the pressure difference and flow difference at the end of pipeline rather than the time difference of a negative pressure wave arriving upstream and downstream. By analyzing the data obtained from leaks in an experimental pipeline, the maximum localization error is 10 m and the minimum localization error is 5 m. The experimental results show that the proposed method can be used to locate the leak of short distance pipeline.
Published Version
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