Research On The Application Of Infrasound Detection Technology In Long Oil Pipeline

In recent years,the aging and man-made damage of long oil pipeline are common around the world.Explosion accidents caused by leakage occur from time to time,which have a great impact on the safety of human life and property.Rapid and accurate location of the leakage has become an urgent problem to be solved.The research shows that infrasound detection technology is one of the more accurate detection technologies at present.Firstly,this paper introduces the leak location principle of infrasound detection method and the propagation characteristics of infrasound signal.At the same time,it improves the accuracy of long oil pipeline leak detection and location by modifying the positioning formula.Secondly,aiming at the problem that there are a large number of noise signals in the infrasound signals collected during pipeline leakage,the paper proposes to use the wavelet denoising method to denoise the signals,so as to improve the detection accuracy.At the same time,the estimation algorithm of infrasound time delay is solved,and the time difference between the first and last ends of the infrasound sensor is determined by the cross-correlation analysis method,and the algorithm is improved,which greatly improves the calculation efficiency and the estimation accuracy of the time delay.Finally,a set of infrasound pipeline leak detection system based on LabVIEW is designed.The whole system consists of four modules,which can carry out real-time detection of the pipeline operation.The feasibility of this detection system is confirmed through the analysis and comparison of multiple experiments and experimental results.