The invention discloses a high-speed rail track quality detection method and system based on an optical fiber sensing technology, and relates to the technical field of track quality detection.The method comprises the steps that the time scale and frequency of a vibration signal are extracted at the same time, the signal is filtered, part of white noise can be filtered out, and the signal-to-noise ratio of the system is increased; twice signal differential processing is carried out on the filtered data, white noise is eliminated, and the signal-to-noise ratio of the system is further improved; wavelet decomposition is carried out on the signals, wavelet reconstruction is carried out on a low-frequency part, the accurate positioning characteristic of the system is optimized, and the specific position of an abnormal event can be accurately determined; and finally, threshold selection is carried out, the position of a peak point of the spectrogram is coupled as the abnormal position of the high-speed rail, and a result is output. The signal-to-noise ratio of signal processing is improved, and the extraction quality and accuracy of the time scale and the frequency of the vibration signal are improved.
本发明公开了一种基于光纤传感技术的高铁轨道质量检测方法及系统,涉及轨道质量检测技术领域,包括:对振动信号的时间尺度和频率同时提取,对信号进行滤波处理,可滤除部分白噪声,提高系统信噪比;对滤波完的数据进行两次信号差分处理,消除了白噪声,进一步地提高系统信噪比;对信号进行小波分解,对低频部分进行小波重构,优化系统精确定位特性,可精准确定异常事件发生具体位置;最后进行阈值选择并耦合频谱图峰值点的位置为高铁轨道发生异常的位置并输出结果。提高了信号处理的信噪比,提高了振动信号的时间尺度和频率的提取质量和精准度。
High-speed rail track quality detection method and system based on optical fiber sensing technology
一种基于光纤传感技术的高铁轨道质量检测方法及系统
2024-02-27
Patent
Electronic Resource
Chinese
IPC: | G01H MEASUREMENT OF MECHANICAL VIBRATIONS OR ULTRASONIC, SONIC OR INFRASONIC WAVES , Messen von mechanischen Schwingungen oder Ultraschall-, Schall- oder Infraschallwellen / B61K Andere Hilfseinrichtungen für Eisenbahnen , OTHER AUXILIARY EQUIPMENT FOR RAILWAYS / G06F ELECTRIC DIGITAL DATA PROCESSING , Elektrische digitale Datenverarbeitung |
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