Analysis of 70° Ghost Echo of Bolt Hole in High-speed Rail Flaw Detection Ultrasonic Examination

Pin WANG; Jingwei CAO; Hongliang LI; Lang XIA

doi:10.13890/j.issn.1000-128x.2021.03.005

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Analysis of 70° Ghost Echo of Bolt Hole in High-speed Rail Flaw Detection Ultrasonic Examination

Rail Engineering Vehicle Column | 更新时间：2021-12-09

- Analysis of 70° Ghost Echo of Bolt Hole in High-speed Rail Flaw Detection Ultrasonic Examination
- Electric Drive for Locomotives Issue 3, Pages: 28-31(2021)
- 作者机构：
  
  1.株洲时代电子技术有限公司，湖南　株洲　412007
- 作者简介：
- 基金信息：
- DOI：10.13890/j.issn.1000-128x.2021.03.005
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Pin WANG, Jingwei CAO, Hongliang LI, et al. Analysis of 70° Ghost Echo of Bolt Hole in High-speed Rail Flaw Detection Ultrasonic Examination. [J]. Electric Drive for Locomotives (3):28-31(2021)
DOI：

Pin WANG, Jingwei CAO, Hongliang LI, et al. Analysis of 70° Ghost Echo of Bolt Hole in High-speed Rail Flaw Detection Ultrasonic Examination. [J]. Electric Drive for Locomotives (3):28-31(2021) DOI： 10.13890/j.issn.1000-128x.2021.03.005.

摘要

在高速钢轨超声波探伤过程中，B型显示中有时会在螺孔附近的钢轨轨头出现一些异常回波信号点，但该信号实际并非伤损回波，而是螺孔幻象波，该信号与较严重的轨头核伤有很高的相似性，因此容易被误判为重伤。根据幻象波的产生原理，基于钢轨探伤车检测的60 kg/m钢轨的B型显示数据，对螺孔幻象波进行了传播路径分析，并通过与实际数据相比较和CIVA软件仿真，验证了分析的正确性。对该幻象波的特点进行了总结，为工程应用中对螺孔幻象波的识别提供了理论支持，可提高钢轨探伤的准确性，降低检测误报率。

Abstract

In the detection process of high-speed rail flaw by ultrasonic flaw, there are some abnormal echoes in rail head near the bolt holes in B scan sometimes, however, they are not echoes from defects but ghost echoes actually. They are so similar to transverse defects in rail head that they can be easily misidentified as serious defects. According to the principle of ghost echoes, the propagation paths of ghost echoes was analyzed based on the B scan data of 60 kg/m rail detected by rail flaw detection vehicle. Ghost echoes from bolt holes were finally verified by the comparison of the calculated result with actual data and the simulation with CIVA software. Furthermore, the characteristics of ghost echos were summarized in this paper, which can provide theoretical support for the recognition of ghost echoes from bolt holes, improve detection rate and reduce false alarming rate.

关键词

钢轨探伤车超声波探伤幻象波螺孔B型显示钢轨

Keywords

rail flaw detection vehicleultrasonic detectionghost echorail bolt holeB Scanrail

references

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