Feature extraction method for switch action current curve and switch fault diagnosis method

Abstract

The invention discloses a feature extraction method for a switch action current curve. The method comprises the following steps: obtaining current data of a switch action to generate the switch action current curve; converting the switch action current curve into a projection coordinate system; determining subsections of various switch action sections in the projection coordinate system; and outputting starting points and end points of current value ranges. The method is simple and efficient; the extracted features can provide bases for feature extraction of a diagnosis model; and the selected features can be taken as input parameters of the model. According to a switch fault diagnosis method employing the feature extraction method disclosed by the invention, maintenance information can be timely and accurately provided when a switch is broken down; and on-site maintenance personnel are guided to carry out a maintenance on the faulty switch in a targeted manner, so that the maintenance cost is reduced; the service efficiency of the switch is improved; various adverse effects caused by faults can be reduced; a fault time delay is compressed; a transport delay is further reduced; and the feature extraction method and the switch fault diagnosis method are of important and practical significance in improvement of the safety and the efficiency of a transportation system.

Description

technical field [0001] The invention relates to a fault diagnosis method of a turnout in the railway field, in particular to a method for extracting features of a turnout action current curve using value projection and a histogram, and a method for diagnosing a turnout by using the feature extraction method. Background technique [0002] The main function of the turnout is to guide the running direction of the wheels to realize the transfer and cross-track operation of the train. It is one of the key equipment to ensure the safety and efficiency of railway transportation. [0003] my country's large-scale railway network covers a vast area, complex and diverse climatic conditions, different operating modes and train equipment conditions, all of which pose great challenges to the application of turnouts. In addition, the railway line is busy, and the turnouts are frequently switched, which will cause wear and tear during long-term use, and because the turnouts are used in the...

AI Technical Summary

Problems solved by technology

The working mechanism of the turnout is complex. During the switching process of the turnout, there are great uncertainties in the change characteristics of the operating current of the switch point machine and the switching resistance of the turnout. How to extract the fault characteristics and realize the fault diagnosis based on the operating current curve of the turnout is extremely important. challenging puzzle

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