Abstract
Penetration states significantly affect the service performance of weld products. For improving welding quality, it is essential to real-timely monitor the penetration states of molten pool during welding process. This study adopts arc sound signals to identify penetration states of weld seam. Firstly, the time–frequency spectrum images of arc sounds are obtained with short-time Fourier transform. And based on a convolution neural network, the penetration states of weld seam are identified. For improving the anti-interference ability of the proposed identification method, a mathematical model that simulates the functions of human auditory system is developed. The auditory spectrum images of arc sounds are acquired with this model. Based on the auditory spectrum images of arc sounds, the penetration states are identified. The experimental results show that the proposed method has high anti-interference ability. When the signal-to-noise ratio is less than 5 dB, the accuracy rate of identification keeps more than 95%.
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This work was supported by the Natural Science Foundation of Shanghai (21ZR1425900, 21010501600).
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Yanfeng Gao: conceptualization, methodology, writing—original draft preparation, funding acquisition.
Qisheng Wang: investigation.
Jianhua Xiao: data curation, visualization.
Genliang Xiong: writing—review and editing.
Hua Zhang: supervision, project administration.
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Gao, Y., Wang, Q., Xiao, J. et al. Weld penetration identification with deep learning method based on auditory spectrum images of arc sounds. Weld World 66, 2509–2520 (2022). https://doi.org/10.1007/s40194-022-01373-7
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DOI: https://doi.org/10.1007/s40194-022-01373-7