大型溶接構造物における溶接部の安全監視に関する研究　テレメータＡＥの開発と実用化

• 菊田 米男

  大阪大学工学部

• 落合 真一郎

  大阪大学工学部

• 岩永 幹夫

  大阪大学工学部

書誌事項

タイトル別名

• Study on Safety Surveillance of Weld in Large Welded Structures
• テレメーターAEの開発と実用化

抄録

We have developed the world-first 10 channel acoustic emission telemetry system where acoustic emission singals (envelope profile) from incipient crackings are transmitted to signal processing unit by way of FM radio. The system was designed to apply acoustic emission techniqure to the continuous safety surveillance of very large welded structures like oil storage tnaks, line pipes, and chemical reactors where enormous lengths of wiring are required otherwise.<BR>The system was applied to a 17 m diameter spherical tank and a 10⁴ kl cone-roof tank where a pulse simulating acoustic emission was generated at certain point on the surfaces and recieved at the various locations of different distances up to 10 m from the signal source. Both arrival-time triangulation and attenuation calibration method were used to locate acoustic emission events. Sound velocity and attenuation characteristics were obtained by using the leading edge of the FM-radioed acoustic emission envelope and its amplitude respectively. The measured values correspond well with the ones reported in the literatures. Further the system was successfully applied to monitor and locate cracks of hydrogen weld cracking as well as fatigure crack propagation of a 3 m diameter spherical pressure vessel.

収録刊行物

• 溶接学会誌

  溶接学会誌 49 (4), 254-259, 1980

  一般社団法人 溶接学会

キーワード

• Metals and Alloys
• Surfaces, Coatings and Films
• Mechanical Engineering
• Mechanics of Materials

詳細情報

• CRID: 1390001206500271360
• NII論文ID: 130003763541
• DOI: 10.2207/qjjws1943.49.254
• ISSN: 18837204
• ISSN: 00214787
• 本文言語コード: ja
• データソース種別:
  • JaLC
  • Crossref
  • CiNii Articles
• 抄録ライセンスフラグ: 使用不可