The invention discloses a rail fastener looseness identification method based on an ultra-weak fiber grating vibration optical cable, and relates to the field of rail engineering. The method comprises the following steps: building a steel rail vibration signal acquisition system based on an ultra-weak fiber grating vibration optical cable to obtain signals of steel rail vibration under various working conditions; acquiring an optimal modal component of the steel rail vibration signal under each working condition; determining influence indexes of steel rail vibration, and calculating time domain characteristic values of the steel rail vibration signals under various working conditions; and constructing a track fastener looseness identification model based on the convolutional neural network and the bidirectional long-short-term memory network to obtain a track fastener looseness identification result. According to the invention, the limitation that a plurality of vibration optical cables cannot be simultaneously used for rail long-line distance detection is broken through, the flexibility of the identification method is improved, the arrangement of the device is simple, and a large number of vibration signals can be collected for rail fastener looseness identification, so that the reliability of rail fastener looseness identification is improved.

    本发明公开了一种基于超弱光纤光栅振动光缆的轨道扣件松动识别方法,涉及轨道工程领域。该方法包括以下步骤:基于超弱光纤光栅振动光缆搭建钢轨振动信号采集系统,以获取钢轨振动在各个工况下的信号;获取钢轨振动信号在各个工况下的最佳模态分量;确定钢轨振动的影响指标,计算钢轨振动信号在各个工况下的时域特征值;基于卷积神经网络和双向长短期记忆网络构建轨道扣件松动识别模型,以获取轨道扣件松动识别结果。本发明突破了无法将多个振动光缆同时用于轨道长线距离检测的限制,提高了识别方法的灵活性,并且装置布设简单,能采集大量振动信号进行轨道扣件松动识别,从而提升轨道扣件松动识别的可靠性。


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    Title :

    Track fastener looseness identification method based on ultra-weak fiber grating vibration optical cable


    Additional title:

    一种基于超弱光纤光栅振动光缆的轨道扣件松动识别方法


    Contributors:
    LIU SHENGCHUN (author) / NING TIGANG (author) / ZHANG BINGBING (author) / FAN WENXIAO (author) / WU JIAOMENG (author) / ZHAI YUANBO (author)

    Publication date :

    2025-03-07


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Chinese


    Classification :

    IPC:    G01H MEASUREMENT OF MECHANICAL VIBRATIONS OR ULTRASONIC, SONIC OR INFRASONIC WAVES , Messen von mechanischen Schwingungen oder Ultraschall-, Schall- oder Infraschallwellen / B61L Leiten des Eisenbahnverkehrs , GUIDING RAILWAY TRAFFIC / G06F ELECTRIC DIGITAL DATA PROCESSING , Elektrische digitale Datenverarbeitung / G06N COMPUTER SYSTEMS BASED ON SPECIFIC COMPUTATIONAL MODELS , Rechnersysteme, basierend auf spezifischen Rechenmodellen




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