A Method of Using Sound Waves to Detect Pipeline Leaks

Abstract

The invention discloses a method for detecting leakage of a pipeline by utilizing sound waves. The method is used for locating the leakage position of the pipeline. The method comprises the followingsteps that a sound wave signals which is propagated on the surface of a to-be-detected pipeline are collected; a power spectrum is obtained through short-time fourier transform; the center frequency of the sound wave signals are calculated by using a formula; according to the center frequency, a band-pass range of band-pass filtering is set, and the sound wave signals are filtered in the band-passrange; hilbert transform is carried out on the filtered sound wave signals, and the phase of the filtered sound wave signals is obtained through calculation; and arrival time of the signals are determined according to the phase position of the filtered sound wave signals, and the position where the to-be-detected pipeline leaks is determined according to the arrival time of the signals. By meansof the method, errors caused by manual setting parameters can be avoided in actual detection, the accuracy and the stability of a detection result are guaranteed, so that operation is simplified, andthe efficiency is improved.

Description

technical field [0001] The invention relates to the field of oil and gas pipeline leakage detection, in particular to a method for detecting pipeline leakage by using sound waves. Background technique [0002] Oil and gas pipelines play an extremely critical role in the long-distance transportation of important resources such as oil and natural gas. However, since most pipelines are laid in the wild or underground and other harsh natural environments, they are easily damaged, and once the pipeline leaks, both Cause serious pollution, will bring heavy economic loss again. Therefore, it is of great application value to be able to quickly detect and locate pipeline leaks. [0003] For the problem of pipeline leakage, there are many detection schemes used in practice, such as pressure distribution method, negative pressure wave detection method, mass balance method, cable detection method, etc., and of course acoustic wave detection method. Because the components used in acous...

AI Technical Summary

Problems solved by technology

At present, in the process of using acoustic waves to detect pipeline leaks, the original data collected are mostly denoised by wavelet, which can effectively solve the problem of inaccurate positioning in traditional detection

[0004] However, since wavelet denoising requires artificially selecting basis functions and setting thresholds, this will generate detection errors and affect the stability of detection results, and artificially setting parameters will also increase the difficulty of data processing operations, thereby limiting acoustic detection. application of law

Images