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LIU Lijun, ZHOU Bintao, DAI Hongbin, BI Shujuan, LAN Hu, ZHANG Huajun. Dual-channel signal acquisition and characteristics analysis of arc sound in pipe MIG welding[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2012, (8): 41-44.
Citation: LIU Lijun, ZHOU Bintao, DAI Hongbin, BI Shujuan, LAN Hu, ZHANG Huajun. Dual-channel signal acquisition and characteristics analysis of arc sound in pipe MIG welding[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2012, (8): 41-44.
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Dual-channel signal acquisition and characteristics analysis of arc sound in pipe MIG welding

  • 1.

    School of Material Science & Engineering, Harbin University of Science and Technology, Harbin 150080, China;Ningbo Institute of Technology, Zhejiang University, Ningbo 315100, China

  • 2.

    School of Material Science & Engineering, Harbin University of Science and Technology, Harbin 150080, China

  • 3.

    School of Material Science & Engineering, Harbin University of Science and Technology, Harbin 150080, China;School of Science, Harbin Institute, Harbin 150086, China

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  • Received Date: October 31, 2011
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    • Abstract
  • Dual-channel signal acquisition and characteristic analysis was investigated in pipe MIG welding.Since the echo interference is relatively large in the closed space within pipe, the two-channel arc sound signals were studied with the independent component analysis(ICA).The ICA signals were de-noised with wavelet.The signal-to-noise ratio was obviously improved.The relationship between the arc sound signals inside and outside the pipe and weld penetration status was analyzed from time, frequency and time-frequency domain, respectively.The experimental results showed that the amplitude of signal energy was related to the weld penetration status.The signal energy increased with the increasing of weld penetration.The research in this paper provides technical basis for monitoring welding quality with arc signal.
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