Turnout steel rail damage identification method

An identification method and technology of turnout, applied in the field of rail transit, can solve the problem that the detection scheme cannot be applied to the rail of the turnout.

Inactive Publication Date: 2021-04-02
SOUTHWEST JIAOTONG UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, for turnout rails with continuously variable cross-sections, this detection scheme cannot be applied to turnout rails. Therefore, a damage identification method for turnout rails is needed

Method used

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  • Turnout steel rail damage identification method
  • Turnout steel rail damage identification method
  • Turnout steel rail damage identification method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Such as figure 1 As shown, this embodiment provides a method for identifying damage to a turnout rail, which includes the following steps:

[0023] 1. Detection of rail bottom defects: use a pair of linear array transducers, which are placed statically on both sides of the rail bottom, and perform sectoral scanning on the rail bottom area by setting different angles, and electronically scan and detect defects under the coverage area ;

[0024] 2. Detection of rail waist defects: Considering the characteristics of the continuously variable section of the turnout rail, the phased array device cannot be placed smoothly on the rail head of some sections, and considering the length and width of the rail waist area, a single linear array transducer is used The device uses fan-shaped scanning and sets different scanning angles to cover the rail waist area of ​​the entire turnout rail; the detection scheme for the bottom of the rail is as follows: image 3 shown;

[0025] 3....

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PUM

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Abstract

The invention relates to the technical field of rail transit, and particularly relates to a turnout steel rail damage identification method. The method comprises the steps of 1, detecting defects of the rail bottom, specifically, respectively statically placing a pair of linear array transducers on two sides of a rail bottom, performing sector scanning on a rail bottom area by setting different angles, and performing electronic scanning detection on defects under a coverage area; 2, detecting defects of a rail web, specifically, using a single linear array transducer, scanning in a fan-shapedmanner, and setting different scanning angles to cover the rail web area of the whole turnout steel rail; and 3, detecting defects of a rail head, specifically, placing a single linear array transducer at stable positions of different rail head sections, completely covering the rail head area of the turnout steel rail by setting different scanning angles and different placing positions, and detecting by fan-shaped scanning. According to the invention, the areas of the rail head, the rail web and the rail bottom can be comprehensively covered, and the damage of the rail head and the rail bottomof the steel rail can be recognized more clearly.

Description

technical field [0001] The invention relates to the technical field of rail transit, in particular to a method for identifying damage to a turnout rail. Background technique [0002] The defects in rail weld detection are mainly volume type (point shape) defects and area type defects. Volume defects include inclusions, porosity, shrinkage cavities, overburning, etc., and area defects include light spots, gray spots, cracks, incomplete penetration, fatigue cracks, etc. [0003] Phased array ultrasonic detection technology is a multi-channel imaging scanning technology. The ultrasonic phased array transducer combines several independent piezoelectric chips into an array according to a certain arrangement. By controlling the excitation sequence of the piezoelectric chips and Time delay, to realize the deflection and focusing of the sound beam. Using this technology to detect the turnout rail can improve the detection coverage, simplify the detection scheme, and improve the det...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N29/04G01N29/265
CPCG01N29/04G01N29/265
Inventor 徐井芒陈嵘王平江文强王树国胡辰阳方嘉晟安博洋
Owner SOUTHWEST JIAOTONG UNIV
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