The invention discloses a dictionary fusion steel rail damage positioning method based on dynamic time warping, and the method comprises the steps: segmenting a multi-channel AE signal into peak detection frames, and calculating the time difference between adjacent frames, so as to estimate the rolling distance of a wheel. Meanwhile, the multi-channel AE signal can train a sub-dictionary and a reference dictionary in previous work. The multi-dictionary SR algorithm based on the improved DTW is innovated, a unified fusion dictionary is synthesized through sub-dictionary weighting, damage feature information is enhanced, and most WRRN is reduced. In the process, the innovative ADTW-SDM algorithm reflects the global features of the dictionary atoms, and the similarity between the atoms is accurately evaluated through the second-order difference value of the Mahalanobis distance. A double-feature adaptive threshold is designed for detecting and positioning damage on the steel rail. The method provides guidance for follow-up accurate detection and positioning of large-range steel rail damage based on the advanced AE technology.

    本发明公开了一种基于动态时间规整的字典融合钢轨伤损定位方法,所述方法中,车轮滚动距离是通过将多通道AE信号分割成峰值检测帧并计算相邻帧之间的时间差来估算的。同时,多通道AE信号会训练子字典和先前工作中的基准字典。基于改进DTW的多字典SR算法经过创新,通过子字典加权合成了统一的融合字典,增强了损伤特征信息,减少了大部分WRRN。在此过程中,创新的ADTW‑SDM算法体现了字典原子的全局特征,并通过Mahalanobis距离的二阶差值精确评估原子间的相似性。设计了一种双特征自适应阈值,用于检测和定位钢轨上的损坏。本发明为后续基于先进AE技术的大范围钢轨伤损精确检测与定位提供指导。


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    Title :

    Dictionary fusion steel rail damage positioning method based on dynamic time warping


    Additional title:

    一种基于动态时间规整的字典融合钢轨伤损定位方法


    Contributors:
    ZHANG XIN (author) / SONG SHUZHI (author) / SHEN YI (author) / CHEN YIFEI (author)

    Publication date :

    2024-12-13


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Chinese


    Classification :

    IPC:    G01N Untersuchen oder Analysieren von Stoffen durch Bestimmen ihrer chemischen oder physikalischen Eigenschaften , INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES / B61K Andere Hilfseinrichtungen für Eisenbahnen , OTHER AUXILIARY EQUIPMENT FOR RAILWAYS / G06F ELECTRIC DIGITAL DATA PROCESSING , Elektrische digitale Datenverarbeitung



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