The invention relates to the technical field of distributed optical fiber vibration sensing, in particular to a train state monitoring method based on phi-OTDR, which acquires the position, the speed and the running direction of a train in real time by acquiring rail vibration signals in the running process of the train and processing and analyzing signal characteristics. A phi-OTDR distributed optical fiber sensing optical path is combined with a railway track, vibration data along the railway track are collected and demodulated through a signal demodulation module, data processing is carried out through a sliding accumulation movement difference algorithm to locate the running position of a train, demodulated amplitude data and phase data are sent to a host through a high-speed transmission interface, and the host is connected with the railway track. And the state of the train is monitored in real time through data analysis of the host. According to the system, digital domain demodulation is carried out on collected signals through the signal demodulation module, demodulated data are processed through the sliding accumulation and movement difference module, and the real-time monitoring efficiency of the whole system on the train state is improved.

    本发明涉及分布式光纤振动传感技术领域,具体涉及一种基于Φ‑OTDR的列车状态监测方法,通过对列车行进过程中铁轨振动信号采集以及对信号特征的处理与分析,实时获得列车位置、速度和行驶方向。通过将Φ‑OTDR分布式光纤传感光路与铁路轨道结合,采集铁轨沿线的振动数据通过信号解调模块进行解调,通过滑动累加移动差分算法进行数据处理来定位列车的行驶位置,将解调后的振幅数据和相位数据通过高速传输接口发送到主机,通过主机对数据的分析实现对列车状态的实时监测。本发明通过信号解调模块对采集的信号进行数字域解调,通过滑动累加移动差分模块对解调后的数据进行处理,提高了整个系统对列车状态的实时监测效率。


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    Title :

    Train state monitoring method based on phi-OTDR


    Additional title:

    一种基于Φ-OTDR的列车状态监测方法


    Contributors:
    LI DONG (author) / ZOU HUI (author) / LI WEI (author) / PAN NING (author) / ZHANG YUNSHAN (author) / WANG LONGSHENG (author) / YU XIAO (author) / HEO JIN (author) / ZHANG HONGYANG (author) / ZHAO MENGYAO (author)

    Publication date :

    2024-04-05


    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 / G01M TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES , Prüfen der statischen oder dynamischen Massenverteilung rotierender Teile von Maschinen oder Konstruktionen



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