Vibration monitoring method of train compartment, establishment and application of vibration signal feature library

Abstract

The invention discloses a vibration monitoring method for a train compartment, a method for establishing and applying a vibration signal feature library, and adopts a non-invasive vibration monitoring method for a train compartment. During actual monitoring, only the vibration signals of the total measuring points in the train compartment need to be obtained, avoiding Redundant sensors, cost saving, conducive to train light weight, accurately and truly reflect the relationship between the position of the vibration source, phase offset, and amplitude attenuation, can monitor the vibration of unknown vibration sources, and can identify abnormal vibrations of the vibration source , so as to provide a basis for abnormal vibration processing; the vibration source signal can be reconstructed on the basis of only measuring the vibration signal of the total measuring point, so as to realize the real-time update of its multi-element vibration signal feature library, and the multi-element vibration signal feature library can be a vibration signal Optimized decomposition, vibration signal image identification, abnormal vibration signal identification, etc. provide data basis.

Description

technical field [0001] The invention belongs to the technical field of train compartment vibration identification, in particular to a train compartment vibration monitoring method, a vibration signal feature database establishment and application method. Background technique [0002] In recent years, my country's high-speed trains have continued to develop. During the high-speed operation of the train, the interior of the train compartment will be affected by external vibration sources, resulting in vibration. On the one hand, the vibration of the compartment can reflect the operation of the train components that are in contact with the compartment. On the one hand, it will affect passenger comfort and ride experience. [0003] Existing train compartment vibration real-time monitoring methods have the following disadvantages: [0004] First, only installing sensors in key parts cannot realize the monitoring of unknown vibration sources. For example, the patent whose publica...

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Problems solved by technology

[0004] First, only installing sensors in key parts cannot realize the monitoring of unknown vibration sources

For example, the patent whose publication number is CN111044303A proposes a method for diagnosing abnormal vibration in the passenger compartment of a maglev train. This method installs a large number of sensors in the passenger compartment of the train to realize the monitoring of abnormal vibration in the passenger compartment of the train, but the patent does not involve the detection of unknown vibration sources. monitor

[0005] Second, the current monitoring method is mainly to directly monitor a large number of sensors installed intrusively on the train. Although the accuracy is high, it will inevitably lead to redundant and wasteful sensors.

For example, the patent whose publication number is CN110879102A proposes a rail train vibration monitoring system. The system sets multiple vibration monitoring terminals in each car and transmits data to the general control center in real time to determine whether the car vibration is abnormal. The method does not involve the monitoring of the vibration source of the train, and more monitoring equipment such as sensors are required, and the cost is relatively high

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