Controlling of Welding and Surface Treatment Processes by Real Time Fracture Monitoring

• Project/Area Number: 26820302
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Multi-year Fund
• Research Field: Composite materials/Surface and interface engineering
• Research Institution: The University of Tokyo
• Principal Investigator: Ito Kaita 東京大学, 工学(系)研究科(研究院), 講師 (30554381)
• Project Period (FY): 2014-04-01 – 2016-03-31
• Project Status: Completed (Fiscal Year 2015)
• Budget Amount: ¥3,900,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥900,000); Fiscal Year 2015: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000); Fiscal Year 2014: ¥2,340,000 (Direct Cost: ¥1,800,000、Indirect Cost: ¥540,000)
• Keywords: アコースティック・エミッション法 / 非破壊評価 / 波形解析 / 摩擦攪拌接合 / 懸濁液プラズマ溶射 / プロセスモニタリング / GPGPU

Outline of Final Research Achievements

An acoustic emission (AE) measurement system which includes a novel waveform analysis method with parallel processing by GPGPU was developed for monitoring of materials working processes under noisy environment. Herewith, parameter settings are no longer needed for noise reduction and AE event detection. The whole analysis is done in real time and automatically.
Furthermore, friction stir welding (FSW) and suspension plasma spraying (SPS) processes were monitored by the developed AE measurement system. Defects were detected in real-time and the effectiveness of process controlling which is based on this result was shown.

Research Products

• [Presentation] 連続計測AE波形の解析による接合および表面加工プロセスのモニタリング (2016)
  • Author(s): 伊藤 海太
  • Organizer: 日本鉄鋼協会
  • Place of Presentation: 東京理科大学(東京都葛飾区)
  • Year and Date: 2016-03-24
  • Invited
• [Presentation] AE法を用いた難燃性マグネシウム合金摩擦攪拌接合中の欠陥種の識別 (2015)
  • Author(s): 伊藤 海太
  • Organizer: 軽金属学会
  • Place of Presentation: 日本大学(千葉県習志野市)
  • Year and Date: 2015-11-22
• [Presentation] 多段階AICピッカーを用いた高ノイズ環境におけるAE位置標定の高精度化 (2015)
  • Author(s): 伊藤 海太
  • Organizer: AE総合コンファレンス
  • Place of Presentation: ウインクあいち・愛知県産業労働センター (名古屋市中村区)
  • Year and Date: 2015-11-19
• [Presentation] アコースティック・エミッション法を利用した鋼材溶接時の温度履歴の推定 (2015)
  • Author(s): 伊藤 海太
  • Organizer: 日本鉄鋼協会
  • Place of Presentation: 九州大学 (福岡県糸島市)
  • Year and Date: 2015-09-16
• [Presentation] 炭素鋼板材の摩擦攪拌接合中のアコースティック・エミッション計測 (2015)
  • Author(s): 伊藤 海太, 川口 卓哉, 上路 林太郎, 藤井 英俊, 榎 学
  • Organizer: 日本鉄鋼協会 第169回春期講演大会
  • Place of Presentation: 東京大学, 東京都
  • Year and Date: 2015-03-18 – 2015-03-20
• [Presentation] AE法による懸濁液プラズマ溶射トップコート中のき裂発生モニタリング (2015)
  • Author(s): 米田 直晃, 伊藤 海太, 荒木 弘, 黒田 聖治, 榎 学
  • Organizer: 日本金属学会 第156回春期講演大会
  • Place of Presentation: 東京大学, 東京都
  • Year and Date: 2015-03-18 – 2015-03-20
• [Presentation] Development of advanced AE equipment and its application to friction stir welding (2015)
  • Author(s): Kaita Ito
  • Organizer: KRISS - U. of Tokyo Joint Workshop on Structural Health Monitoring
  • Place of Presentation: Daejeon, Korea
  • Year and Date: 2015-03-13
• [Presentation] Real-time Noise Reduction of Continuously Recorded AE Waveforms using GPU Based Parallel Computing Technique (2014)
  • Author(s): Kaita Ito and Manabu Enoki
  • Organizer: The 22nd International Acoustic Emission Symposium
  • Place of Presentation: 東北大学, 宮城県
  • Year and Date: 2014-11-11 – 2014-11-14