The invention discloses a rail transit structure health monitoring method, and belongs to the technical field of rail transit structure health monitoring. According to the method, vibration sensors are symmetrically arranged on tracks on the two sides to obtain a pair of vibration signals, cepstrum is extracted from each section of vibration signals, real part and imaginary part cepstrum data are obtained, cepstrum features of the real part and imaginary part are extracted respectively, and corresponding feature vectors are constructed. And the mismatching degree of the pair of vibration signals on the feature vector is obtained, and the mismatching degree of the real part and the imaginary part is obtained. Dividing each mismatching degree into three parts according to the time sequence, extracting a mean value, and calculating a change coefficient; and extracting real part and imaginary part feature values of the mismatching degree of each part, performing feature enhancement by using a change coefficient, and finally obtaining a health value of the rail transit structure. According to the method, the vibration signals are processed and analyzed through multiple steps, and the accuracy of rail transit structure health monitoring is improved.
本发明公开了一种轨道交通结构健康监测方法,属于轨道交通结构健康监测技术领域。本方法在两侧轨道对称布置振动传感器获取一对振动信号,对每段振动信号提取倒频谱,得到实部与虚部倒频谱数据,分别提取两者的倒频谱特征并构建相应特征向量。进而获取一对振动信号在特征向量上的不匹配度,得到实部和虚部不匹配度。将各不匹配度按时间先后均分为三部分并提取均值,计算变化系数。提取每部分不匹配度的实部与虚部特征值,利用变化系数进行特征强化,最终得到轨道交通结构健康值。该方法通过多步骤对振动信号进行处理分析,提高了轨道交通结构健康监测的准确度。
Rail transit structure health monitoring method
一种轨道交通结构健康监测方法
2025-05-23
Patent
Electronic Resource
Chinese
IPC: | B61L Leiten des Eisenbahnverkehrs , GUIDING RAILWAY TRAFFIC / B61K Andere Hilfseinrichtungen für Eisenbahnen , OTHER AUXILIARY EQUIPMENT FOR RAILWAYS / G01H MEASUREMENT OF MECHANICAL VIBRATIONS OR ULTRASONIC, SONIC OR INFRASONIC WAVES , Messen von mechanischen Schwingungen oder Ultraschall-, Schall- oder Infraschallwellen |
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