Wheel polygon identification method based on wheel-rail vertical force and device thereof

A technology of wheel-rail vertical force and identification method, which is applied in the direction of measuring device, rim measurement/measurement, instrument, etc., can solve the problems of endangering driving safety, restricting, affecting passenger comfort, etc., and achieve the effect of avoiding safety accidents

Inactive Publication Date: 2018-02-02
EAST CHINA JIAOTONG UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, with the increase of the operation time of my country's railways, various diseases that affect the comfort of passengers and endanger the safety...

Method used

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  • Wheel polygon identification method based on wheel-rail vertical force and device thereof
  • Wheel polygon identification method based on wheel-rail vertical force and device thereof
  • Wheel polygon identification method based on wheel-rail vertical force and device thereof

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Embodiment 1

[0056] Embodiment 1: as Figure 1-7 As shown, this embodiment specifically relates to a wheel polygon recognition method and device based on wheel-rail vertical force, which specifically includes the following steps:

[0057] (step 1)

[0058] 1.1) If figure 1 , 2 , 3, carry out the installation and layout of the wheel polygon recognition device, the wheel polygon recognition device specifically includes a strain acquisition module, a train speed acquisition module, a data long-distance transmission module and a remote monitoring module; wherein, the strain acquisition module includes several sets of For the resistance strain gauges 3 at the rail waist of the rail 1, five groups of resistance strain gauges 3 are arranged in total in this embodiment, and the setting positions of each resistance strain gauge 3 are located at the mid-span position between adjacent sleepers 2; the train speed acquisition module is specifically The speed measuring instrument on the train is used...

Embodiment 2

[0091] Embodiment 2: This embodiment specifically relates to a wheel polygon recognition method based on the wheel-rail vertical force. On the basis of Embodiment 1, it will be described in conjunction with a specific case, including the following steps:

[0092] (step 1) as in image 3 As shown in , it is preliminarily estimated that a certain wheel has been ovalized, and the wheel-rail vertical force signal is measured through the strain acquisition module set on the rail 1, as shown in Figure 5 Shown; then the wheel-rail vertical force signal is decomposed by EEMD to obtain the lumped intrinsic mode function IMF component, as shown in Figure 6 as shown; similarly, the other three wheel polygons use the same method for signal decomposition;

[0093] (Step 2) Integrate the lumped intrinsic mode function IMF components in the time domain to obtain the signal marginal spectrum, such as Figure 7 It can be seen from the figure that the damage characteristic frequency f of th...

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Abstract

The invention discloses a wheel polygon identification method based on the wheel-rail vertical force and a device thereof. The identification method comprises the following steps: collecting the wheel-rail vertical force signal by the shear stress method; and analyzing the collected wheel-rail vertical force signal Carry out the EEMD decomposition of the ensemble empirical mode to obtain the aggregated intrinsic mode function IMF component; calculate the marginal spectrum of the intrinsic mode function IMF containing the wheel polygonal disease characteristic information; according to the obtained marginal spectrum of the intrinsic mode function IMF, obtain The damage characteristic frequency f is used to identify whether the wheel has polygons and the type of polygons according to the preset judgment criteria. Its advantages are: it can carry out real-time monitoring and damage evaluation on the vehicles passing through the monitoring section, and it has the characteristics of fast and accurate; The marginal spectrum of the wheel-rail vertical force damage characteristic frequency after polygonal damage of the wheel is obtained.

Description

technical field [0001] The invention belongs to the technical field of railway safety monitoring, and in particular relates to a wheel polygon recognition method based on wheel-rail vertical force and a device thereof. Background technique [0002] In the past ten years, high-speed railway and urban rail transit have developed rapidly due to their advantages of large capacity, energy saving and environmental protection. According to the "13th Five-Year Development Plan" of railways, the period of the 13th Five-Year Plan is still the peak period of railway construction and development , will build a high-speed railway network with "eight vertical and eight horizontal" passages as the backbone and intercity railways as supplements. At the same time, the number of cities under construction and operation of urban rail transit has doubled, and the mileage has increased by about half. However, with the increase of the operation time of my country's railways, various diseases that...

Claims

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Application Information

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IPC IPC(8): B61K9/12G01B21/20
CPCB61K9/12G01B21/20
Inventor 冯青松孙魁刘庆杰王威黎子荣
Owner EAST CHINA JIAOTONG UNIVERSITY
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