The invention discloses a COTDR-based track monitoring system, which comprises an optical filter, a photoelectric converter, a signal amplifier, an analog-to-digital converter, a processor, a display module and a system alarm module, and is characterized in that the processor transmits a signal to the system alarm module unidirectionally; optical signals of the pressure measuring optical fiber and the temperature measuring optical fiber sequentially pass through an optical filter, a photoelectric converter and a signal amplifier to obtain an electric signal analog quantity, an analog-to-digital converter converts the electric signal analog quantity into a digital signal quantity, and if a sampling value of the analog-to-digital converter is greater than a threshold, the sampling value is cached to a cache region; the processor acquires a sampling value of the cache region, respectively calculates a cross-correlation curve and an external strain change curve by using a normalized cross-correlation algorithm and a peak value detection algorithm, and transmits the cross-correlation curve and strain values corresponding to the pressure measuring optical fiber and the temperature measuring optical fiber to the display module; the processor sends alarm information to the system alarm module and sends the alarm information to a train dispatching center.

    本发明公开了一种基于COTDR的轨道监测系统,包括光滤波器、光电转换器、信号放大器、模拟数字转换器、处理器和显示模块,以及系统警报模块,处理器向系统警报模块单向传输信号;测压光纤和测温光纤的光信号依次经光滤波器、光电转换器和信号放大器后得到电信号模拟量,模拟数字转换器将电信号模拟量转化为数字信号量,若模拟数字转换器的采样值大于门限,则缓存至缓存区;处理器获取缓存区的采样值,处理器运用归一化互相关算法和峰值检测算法分别计算互相关曲线和外界应变变化曲线,处理器把互相关曲线和测压光纤和测温光纤对应的应变值传输至显示模块上,若应变值大于门限,处理器向系统警报模块发送报警信息并将报警信息发送到列车调度中心。


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    Title :

    Track monitoring system based on COTDR


    Additional title:

    一种基于COTDR的轨道监测系统


    Contributors:
    GAO CHAO (author)

    Publication date :

    2022-11-08


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Chinese


    Classification :

    IPC:    B61L Leiten des Eisenbahnverkehrs , GUIDING RAILWAY TRAFFIC / B61K Andere Hilfseinrichtungen für Eisenbahnen , OTHER AUXILIARY EQUIPMENT FOR RAILWAYS / G01K MEASURING TEMPERATURE , Messen der Temperatur / G01L Messen von Kraft, mechanischer Spannung, Drehmoment, Arbeit, mechanischer Leistung, mechanischem Wirkungsgrad oder des Drucks von Fluiden , MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE



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