Research on Pipeline Leakage Point Positioning Technology Based on IEEMD-IGCC Al-gorithm
The acoustic detection method currently used for detecting leakages in oil and gas pipelines has the disadvantages of weak noise resistance and large positioning errors.Therefore,a pipeline leakage point positioning method based on the IEEMD-IGCC algorithm is proposed.First,on the basis of the EEMD decomposition algorithm,the autocorrelation function of the eigenmode component is ob-tained by calculating the average of each set to determine whether the mode contains noise component,which is judged as the basis for whether to continue to add Gaussian white noise.Then,the generalized quadratic cross correlation is calculated based on different source targets,and the delay value is obtained.Finally,the location of the leakage point is determined according to the time-difference positioning formula.The results show that the leakage signal extracted by the IEEMD algorithm has a good effect,which is consistent with the effective information selection of the kurtosis coefficient.The reconstructed signal not only has a high signal-to-noise ratio and small mean square error,but also greatly reduces the calculation cost.The delay value calculated by the IGCC algorithm is accurate,and the possibility of a large single error is reduced.The IEEMD-IGCC algorithm has good adaptability to different working conditions,the maximum absolute positioning error is no more than 30 m,which greatly improves the positioning accuracy of leakage points.
oil and gas pipelinesleakage pointIEEMDIGCCpositioningadaptability analysis
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