The core task of intelligent detection in electrified railway catenaries is to detect their supporting components. However, due to the large number and variety of components in catenary inspection images, labeled catenary data is often limited, and few studies have focused on leveraging large amounts of unlabeled datasets in this field. This article proposes a novel self-supervised pretraining model catenary support rod masking-based masked image modeling (CSRM-MIM) for detecting catenary support components (CSCs), which effectively utilizes the valuable information in unlabeled catenary data. Specifically, a new semantic catenary support rod area masking (CSRA masking) strategy based on the CSRA features is proposed to guide the model in learning meaningful catenary semantic information during the pretraining process. Additionally, a new Siamese pretrained network framework is designed, incorporating an information interaction enhancement module (IIEM) and a dual reconstruction network to perform dual reconstruction on the semantic mask, thereby extracting global features in the catenary domain. Finally, a multiscale knowledge distillation (MSKD) strategy optimized by the cross-layer fusion module cross-layer fusion decoding (CLFD) is introduced to assist the self-supervised model in acquiring specific-general representations for the catenary field and transferring multiscale information, which benefits subsequent detection tasks. Experimental results demonstrate that this method significantly enhances the detector’s performance in identifying CSCs, owing to the retained self-supervised learning (SSL) strategy.


    Access

    Check access

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    CSRM-MIM: A Self-Supervised Pretraining Method for Detecting Catenary Support Components in Electrified Railways


    Contributors:
    Yang, Haonan (author) / Liu, Zhigang (author) / Ma, Ning (author) / Wang, Xufan (author) / Liu, Wenqiang (author) / Wang, Hui (author) / Zhan, Dong (author) / Hu, Zeyao (author)

    Published in:

    Publication date :

    2025-08-01


    Size :

    8968618 byte




    Type of media :

    Article (Journal)


    Type of material :

    Electronic Resource


    Language :

    English



    Overview of Catenary Detection of Electrified Railways

    Liu, Zhigang / Liu, Wenqiang / Zhong, Junping | Springer Verlag | 2023


    Elasticity of contact wire catenary fastenings on electrified railways

    Gorochkov, Y.I. | Engineering Index Backfile | 1968




    Catenary Support Components and Their Characteristics in High-Speed Railways

    Liu, Zhigang / Liu, Wenqiang / Zhong, Junping | Springer Verlag | 2023