Vibrational signal based railway track geometric deformation detection method

Abstract

The invention relates to a vibrational signal based railway track geometric deformation detection method and belongs to the technical field of train track failure monitoring and diagnosis. The method comprises the following steps: allowing the data to be subjected to short-time Fourier transform based on vibrational data of geometric deformation types of the train at different positions, so as to obtain the vibrational spectrum; extracting the spectrum characteristics, allowing the extracted characteristics to be subjected to dimension reduction through principal component analysis, so as to obtain master spectrum characteristics; building a reliability computation module of each geometric deformation type for a support vector machine of each geometric deformation type; when on-line detection is performed, extracting the spectrum characteristics according to the real-time measured vibrational data, so as to obtain the master spectrum characteristics, obtaining the reliability models of the geometric deformation types through off-line calculation so as to obtain the reliability affiliated to each type, and gaining a diagnosis reliability vector based on the reliability. The detection method can accurately diagnose and position conditions of the geometric deformation types, and can perform on-line analysis and diagnose of the track geometric deformation types when being applied to a real-time operating high-speed train.

Description

technical field [0001] The invention relates to a method for detecting geometric deformation of railway rails based on vibration signals, and belongs to the technical field of train track fault monitoring and diagnosis. Background technique [0002] Railway rails are the foundation of driving, and they directly bear the huge force transmitted by the train wheels. Under the action of these forces, the track will undergo various deformations, which will affect driving safety. With the development of dedicated passenger lines, the contradiction between transportation and line maintenance has become increasingly prominent. Static track irregularities cannot reflect the state of the track well. The track irregularities that really affect driving safety, wheel-rail force, and vehicle vibration are dynamic track irregularities. The manual static inspection data based on the maintenance and repair method of the maintenance plan can no longer meet the requirements of the railway. A...

AI Technical Summary

Problems solved by technology

The manual static inspection data based on the maintenance and repair method of the maintenance plan can no longer meet the requirements of the railway. At the same time, the dynamic inspection vehicle used to repair the dynamic irregularity of the high-speed railway needs to occupy the operation diagram, the cost is high, the detection frequency is low, and it is difficult to meet the requirements of the line. diagnostic needs

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