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System and method for monitoring integrity of steel rails of cloud platforms on basis of guide wave technologies

A cloud platform and monitoring system technology, which is applied in the direction of railway vehicle shape measuring devices, railway car body parts, railway auxiliary equipment, etc., can solve complex, difficult to meet timeliness, cloud online reliability, and strict requirements across a wide range of regions , manual detection and monitoring technology is difficult to meet the detection and monitoring needs and other issues

Active Publication Date: 2019-04-19
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, considering that the rail structure features are more complex and there are many overlapping fasteners, traditional point-to-point non-destructive testing methods such as ultrasonic testing, magnetic flux leakage testing, machine vision and penetration testing are difficult to meet the timeliness and cloud-based online testing requirements in actual monitoring. , reliability, and strict requirements across a wide range of regions
At the same time, considering the busy operation of railway lines, the offline manual detection and monitoring technology of the track during the skylight period has been difficult to meet the growing actual detection and monitoring needs of railways.

Method used

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  • System and method for monitoring integrity of steel rails of cloud platforms on basis of guide wave technologies
  • System and method for monitoring integrity of steel rails of cloud platforms on basis of guide wave technologies
  • System and method for monitoring integrity of steel rails of cloud platforms on basis of guide wave technologies

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0097] Such as Figure 3 to Figure 7 , the cloud platform performs monitoring, processing and analysis based on the guided wave data obtained from the monitoring front-end monitoring.

[0098] Here, a large amount of guided wave monitoring data, that is, guided wave big data, is further mined and analyzed through cross-processing. Here, two sets of rail waist monitoring data Y with an interval of E are taken. i and Y j Carry out monitoring analysis, wherein i=22, j=22 monitoring data, carry out standardization process according to step S1.3, after processing according to step S1.4.1 in claim 5 to step S1.4.3, the coefficient matrix W* that obtains The dimension is 44×23, for the guided wave signal of 44 dimensions, after step S1.4.4 process in claim 5, a total of 23 characteristic sound source information are obtained, after programming in MATLAB, each of the characteristic signal Group coefficient data are visualized, a total of 23 groups.

[0099] In order to get θ i =|1...

Embodiment 2

[0106] Figure 11 Shown is the actual rail waist monitoring signal, the signal-to-noise ratio is low, and it is difficult to distinguish damage.

[0107] The present invention can also monitor, evaluate and locate multiple damages. Here, for example, the actual situation of rails containing 4 damages and growing into 5 damages is compared based on the detection and analysis of the present invention and the traditional reference library method, that is, the damage growth The process was monitored by cross-treatment analysis. In actual monitoring, the guided wave acquisition mode is set to the transducer at one end of the rail to stimulate the emission, and the transducer at the other end receives the rail guided wave signal to obtain the collected data, which is transmitted from the front-end monitoring module to the cloud monitoring server.

[0108] The specific implementation of the present invention adopts the cross processing method, and four damaged guided wave signals an...

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Abstract

The invention discloses a system and a method for monitoring the integrity of steel rails of cloud platforms on the basis of guide wave technologies. The system comprises a front-end monitoring module, a cloud monitoring server and a browsing terminal. The front-end monitoring module comprises a guide wave energy transducer, a temperature sensor and a control cabinet, and a solar panel module, a charge and discharge control circuit, an energy storage module, a transmission interface circuit module, a lower computer control circuit module, a communication interface circuit module, a guide wavereceiving and transmitting module and a signal conditioning module are arranged in the control cabinet. The method includes extracting strong-correlation characteristic signals and coefficient matrixes by means of noise reduction; carrying out dimensionality reduction and noise reduction reconstruction to obtain guide wave signals and acquiring damage locations so as to monitor the integrity of the steel rails. Acoustic emission sources at different structural locations of the steel rails can be represented by the characteristic signals and the coefficient matrixes. Damage of the steel rails can be represented by the guide wave signals. The system and the method have the advantages that the integrity of the steel rails can be effectively reliably monitored by the aid of the system and themethod, the monitoring cross-regionalism and timeliness can be greatly improved, and the system and the method have important practical significance and engineering values.

Description

technical field [0001] The present invention relates to a rail integrity monitoring system and method, in particular to a cloud platform rail integrity monitoring system and method based on guided wave technology. Background technique [0002] In recent years, on the one hand, with the rapid development of the national economy, the railway traffic, which is the lifeline of the national economy, has achieved unprecedented rapid development; on the other hand, with the rapid development of the With a substantial increase, the load and impact on the rail as an important part of the track will also increase, which will inevitably lead to an increase in the probability of damage to the rail, and put forward stricter requirements for the reliable and safe operation of the track. Therefore, there is an urgent need to propose effective and reliable technologies and methods for the detection and service status monitoring of in-service railway rails. [0003] Ultrasonic guided wave t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B61K9/08
CPCB61K9/08
Inventor 柳伟续唐志峰吕福在伍建军张鹏飞
Owner ZHEJIANG UNIV
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