Non-contact type non-destructive detection method, terminal equipment and system for ballastless track defects

A ballastless track, non-contact technology, applied in the processing of detection response signals, using sound waves/ultrasonic waves/infrasonic waves to analyze solids, etc., can solve problems such as inaccurate detection results of ballastless track defects

Pending Publication Date: 2019-05-28
SHIJIAZHUANG TIEDAO UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] In view of this, the embodiment of the present invention provides a non-contact non-destructive detection method, terminal equipment and system for ballastless track defects to solve the problem of inaccurate detection results of ballastless track defects in the prior art

Method used

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  • Non-contact type non-destructive detection method, terminal equipment and system for ballastless track defects
  • Non-contact type non-destructive detection method, terminal equipment and system for ballastless track defects
  • Non-contact type non-destructive detection method, terminal equipment and system for ballastless track defects

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Embodiment 1

[0046] Please refer to figure 1 , figure 1 It is a schematic diagram of the implementation flow of a non-contact non-destructive detection method for ballastless track defects provided by Embodiment 1 of the present invention. The non-contact non-destructive detection method for ballastless track defects in this embodiment includes the following steps:

[0047] Step S101, acquiring the elastic wave signal reflected by the ballastless track to be tested.

[0048]In the embodiment of the present invention, when the surface of the ballastless track to be tested is knocked, a low-frequency elastic wave will be generated, and the elastic wave will propagate to the inside of the ballastless track to be tested. The medium surface of the ballast track will produce reflection, and the reflected elastic wave signal can be obtained. In one implementation manner, a small hammer or a small steel ball is used to manually tap the surface of the ballastless track to be tested to generate el...

Embodiment 2

[0065] Please refer to image 3 , image 3 It is a schematic diagram of the implementation flow of a non-contact non-destructive testing method for ballastless track defects provided by Embodiment 2 of the present invention. figure 1 On the basis of the illustrated embodiment, this embodiment describes in detail the implementation of step S105, as image 3 Shown, the present embodiment method comprises the following steps:

[0066] Step S301, according to the expression Determine the upper limit of the first band, according to the expression A lower limit of the first frequency band is determined.

[0067] Step S302, according to the expression Determine the upper limit of the second band, according to the expression A lower limit of the second frequency band is determined.

[0068] Step S303, according to the amplitude spectrum data to determine the first frequency band Δf 1 =[f 11 , f 12 ] to obtain the first amplitude.

[0069] Step S304, according to the amp...

Embodiment 3

[0074] Please refer to Figure 4 , Figure 4 It is a schematic diagram of non-contact non-destructive testing terminal equipment for ballastless track defects provided by Embodiment 3 of the present invention. The ballastless track defect non-contact non-destructive testing terminal device 4 of this embodiment includes: a processor 401 , a memory 402 and a computer program 403 stored in the memory 402 and operable on the processor 401 . When the processor 401 executes the computer program 403, it realizes the steps in the embodiments of the non-contact non-destructive detection method for ballastless track defects, for example figure 1 Steps S101 to S105 are shown.

[0075] Exemplarily, the computer program 403 can be divided into one or more modules / units, and the one or more modules / units are stored in the memory 402 and executed by the processor 401 to complete this invention. The one or more modules / units may be a series of computer program instruction segments capable...

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Abstract

The invention is applicable to the technical field of railway infrastructure detection, and provides a non-contact type non-destructive detection method, terminal equipment and system for ballastlesstrack defects. The method comprises the steps of obtaining an elastic wave signal reflected by a to-be-detected ballastless track; filtering the elastic wave signal; conducting zero-mean processing onthe filtered elastic wave signal; conducting Fourier transformation on the elastic wave signal obtained after zero-mean processing to obtain amplitude frequency spectrum data; according to the amplitude frequency spectrum data, judging whether the ballastless track has the defects or not. By means of the method, an accurate detection result can be obtained.

Description

technical field [0001] The invention belongs to the technical field of road traffic, and in particular relates to a ballastless track defect non-contact nondestructive detection method, terminal equipment and system. Background technique [0002] In order to ensure the stability of the high-speed railway track, the high-speed railway track adopts ballastless track, which is mainly composed of concrete base, mortar layer, track plate and fastener rail. In the case of high passenger traffic and high freight volume, the defects of ballastless track are increasing day by day. In order to ensure the safe operation of high-speed railway, it is necessary to detect the defects of ballastless track. At present, the traditional detection methods of ballastless track defects include ultrasonic method and radar detection method. When detecting the defects of the ballastless track, the detection results are inaccurate. Contents of the invention [0003] In view of this, embodiments o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N29/46G01N29/04
Inventor 赵维刚张广远杨勇田秀淑王保宪王永卫李荣喆
Owner SHIJIAZHUANG TIEDAO UNIV
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