The Application of Infrasonic Wave and Its Signal Processing in the Leakage Detection and Localization for Pipelines

Using infrasonic wave to detect and locate the leakage of pipelines, can not only detect slow leakage of pipelines with little discharge on line, but also detect high compression ratio gas pipeline leak, which overcomes some shortages of detecting methods on line such as negative pressure wave. Infrasonic wave is suitable for leakage detection of all oil gas pipelines. However, owing to the limitation of frequency domain of sensor, when collecting infrasonic wave signals generated by pipe leakage, the tip of signals detected by sensor will be scrapped. In addition, environmental noise in nature intensively disturbs infrasonic wave signals. In order to reduce the rate of false, the tip signals should be compensated and disposed. In this paper, the detected tip signals is compensated by special algorithm which could quickly separate the real leakage signals from interference signals. Then, compensated signal is processed by wavelet transformation, which makes the detected signals have excellent local characteristics in time-domain and frequency-domain and effectively overcomes the shortages of the Fourier exchanges. It has an inhibition effect on noise and precisely extracts catastrophe point of signals with different resolution at different sites in time frequency plane. The rates of misinformation and omission could be absolutely reduced by means of tip compensation and wavelet transformation above.

• Record URL:
  • https://doi.org/10.1061/41202(423)77
• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/isbn/9780784412022
• Supplemental Notes:
  • Copyright © 2011 ASCE
• Corporate Authors:

  American Society of Civil Engineers

  1801 Alexander Bell Drive
  Reston, VA  United States  20191-4400
• Authors:
  • Wu, Weiqiang
  • Zhao, Huijun
  • Wang, Xiaobing
  • Zhou, Ning
  • Wang, Shuli
• Conference:
  • International Conference on Pipelines and Trenchless Technology 2011
  • Location: Beijing , China
  • Date: 2011-10-26 to 2011-10-29
• Publication Date: 2011

Language

• English

Media Info

• Media Type: Digital/other
• Features: Figures; References;
• Pagination: pp 711-724
• Monograph Title: ICPTT 2011: Sustainable Solutions For Water, Sewer, Gas, And Oil Pipelines

Subject/Index Terms

• TRT Terms: Compression tests; Gas pipelines; Infrasound; Leakage; Signal processing; Time domain analysis; Wavelets
• Subject Areas: Pipelines; Terminals and Facilities; I20: Design and Planning of Transport Infrastructure;

Filing Info

• Accession Number: 01457410
• Record Type: Publication
• ISBN: 9780784412022
• Files: TRIS, ASCE
• Created Date: Dec 18 2012 9:36AM