Computer and Modernization ›› 2024, Vol. 0 ›› Issue (06): 89-94.doi: 10.3969/j.issn.1006-2475.2024.06.015

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Rail Surface State Identification Based on Improved Metric Learning under Small Samples

  



  1. (1. School of Rail Transportation, Hunan University of Technology, Zhuzhou 412007, China;
    2. School of Intelligent Control, Hunan Railway Professional Technology College, Zhuzhou 412012, China)
  • Online:2024-06-30 Published:2024-07-17

Abstract: Abstract: In order to solve the problems of insufficient extraction of key feature information and easy loss of discrimination information in the process of rail surface state identification under small sample conditions, a rail surface state identification method based on improved metric learning is proposed. This method incorporates a pyramid split attention mechanism in the feature extraction network to achieve multi-scale extraction of feature map spatial information, cross-dimensional channel attention and spatial attention feature interaction, so as to solve the problem of insufficient extraction of key feature information caused by the small number of track state samples. Additionally, a deep local splicing operator is employed to splice the local features of the query set and various support set feature maps in pairs, replacing the global feature splicing used in traditional metric learning. This helps fitter out filtering interference information such as background noise, and retains significant distinguishing feature information to a greater extent. Experimental results show that the proposed method can effectively identify the rail surface status, and the recognition accuracy, precision, recall rate, and F1 value reach 97.96%, 98.61%, 98.07%, and 98.34%, respectively. Compared with the small sample learning method the DN4 network with better performance, these indicators increased by 5.75, 5.83, 5.95, and 5.89 percentage points, respectively.

Key words: Key words: rail surface state recognition, small sample, metric learning, pyramid split attention, deep local splicing

CLC Number: