Abstract
Weld defect detection is an important task in the welding process. Although there are many excellent weld defect detection models, there is still much room for improvement in stability and accuracy. In this study, a lightweight deep learning model called WeldNet is proposed to improve the existing weld defect recognition network for its poor generalization performance, overfitting, and large memory occupation, using a design with a small number of parameters but with better performance. We also proposed an ensemble-distillation strategy in the training process, which effectively improved the accuracy rate and proposed an improved model ensemble scheme. The experimental results show that the final designed WeldNet model performs well in detecting weld defects and achieves state-of-the-art performance. Its number of parameters is only 26.8% of that of ResNet18, but the accuracy is 8.9% higher, while achieving a 24.2 ms inference time on CPU to meet the demand of real-time operation. The study is of guiding significance for solving practical problems in weld defect detection, and provides new ideas for the application of deep learning in industry. The code used in this article is available at https://github.com/Wanglaoban3/WeldNet.git.
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Abbreviations
- TIG:
-
Tungsten inert gas
- CNN:
-
Convolutional neural network
- SVM:
-
Support vector machine
- CPU:
-
Central processing unit
- GPU:
-
Graph processing unit
- FCN:
-
Fully connected network
- HDR:
-
High dynamic range
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This study is supported by Shandong Province Key Research and Development Program, No. 2020CXGC011201.
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Wang, R., Wang, H., He, Z. et al. WeldNet: a lightweight deep learning model for welding defect recognition. Weld World (2024). https://doi.org/10.1007/s40194-024-01759-9
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DOI: https://doi.org/10.1007/s40194-024-01759-9