埋設低圧ガス導管の破損に伴う漏洩音響信号の特性と破損箇所の探査

• 今泉　博之・神宮司　元治・国松　直・井清　武弘

  資源環境技術総合研究所安全工学部

Bibliographic Information

Other Title

• <b>埋設低圧ガス導管の破損に伴う漏洩音響信号 </b><b>の特性と破損箇所の探査</b>
• マイセツ テイアツ ガス ドウカン ノ ハソン ニ トモナウ ロウエイ オンキョウ シンゴウ ノ トクセイ ト ハソン カショ ノ タンサ

Abstract

<tt>By examinations of acoustical characteristics of the leak sounds due to a damage in an underground gas pipeline, detection methods of the leak position were studied. Frequency characteristics of the leak sounds out of the pipeline were shown as well as the frequency spectrums due to changes of diameters of the pinholes Though the leak location in the pipaline could identify by sound intensity measurernent on the ground surface, the detectability extensively depended on the depth of the underground pipeline from the surface From measuring and analyzing frequency spectrums af the leak sounds propagating inside the pipeline, the existence of the damages as well a~. the situation of those such as pinholes ar looseness of the joint between the pipes could be detected It was shown that the cross correlation method using the time delay of the leak sounds measured at two distant point*- would be effective to detect location of the damage by analyzing sound </tt><tt>attenuation in distance of the leak sounds in the pipeline </tt>

Journal

• Journal of Japan Society for Safety Enginennring

  Journal of Japan Society for Safety Enginennring 39 (4), 256-263, 2000

  Japan Soceiety for Safety Engineering

Keywords

• Gas pipeline
• Leak sound
• Leak position
• Sound intensity
• Cross correlation

Details

• CRID: 1390001206243775360
• NII Article ID: 10004563016
• NII Book ID: AN00012812
• DOI: 10.18943/safety.39.4_256
• ISSN: 24240656
• ISSN: 05704480
• NDL BIB ID: 5436595
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I5436595
• Text Lang: ja
• Data Source:
  • JaLC
  • NDL
  • CiNii Articles
• Abstract License Flag: Disallowed