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Research paper | Open Access

Comparison study on measurement of rail weld joint between inertial reference method and multi-point chord reference method

Yifan Shi1( ), Yuan Wang2, Xiaozhou Liu3, Ping Wang4
Track Reasearch Lab, School of Civil Engineering, Southwest Jiaotong University (SWJTU), Chengdu, China
Shenzhen EboRail Technology Co., Ltd., Shenzhen, China
College of Urban Transportation and Logistics, Shenzhen Technology University, Shenzhen, China
The Hong Kong Polytechnic University, Hung Hom, China
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Abstract

Purpose

Straightness measurement of rail weld joint is of essential importance to railway maintenance. Due to the lack of efficient measurement equipment, there has been limited in-depth research on rail weld joint with a 5-m wavelength range, leaving a significant knowledge gap in this field.

Design/methodology/approach

In this study, the authors used the well-established inertial reference method (IR-method), and the state-of-the-art multi-point chord reference method (MCR-method). Two methods have been applied in different types of rail straightness measurement trollies, respectively. These instruments were tested in a high-speed rail section within a certain region of China. The test results were ultimately validated through using traditional straightedge and feeler gauge methods as reference data to evaluate the rail weld joint straightness within the 5-m wavelength range.

Findings

The research reveals that IR-method and MCR-method produce reasonably similar measurement results for wavelengths below 1 m. However, MCR-method outperforms IR-method in terms of accuracy for wavelengths exceeding 3 m. Furthermore, it was observed that IR-method, while operating at a slower speed, carries the risk of derailing and is incapable of detecting rail weld joints and low joints within the track.

Originality/value

The research compare two methods’ measurement effects in a longer wavelength range and demonstrate the superiority of MCR-method.

Keywords

Rail weld jointInertial reference methodShort-wavelength irregularitiesMulti-point chord reference method5-m wavelength range

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Railway Sciences
Volume 3 Issue 1,
February 2024
Pages 69-83
DOI: 10.1108/RS-10-2023-0038
Cite this article:
Shi Y, Wang Y, Liu X, et al. Comparison study on measurement of rail weld joint between inertial reference method and multi-point chord reference method. Railway Sciences, 2024, 3(1): 69-83. https://doi.org/10.1108/RS-10-2023-0038

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Received: 13 October 2023
Revised: 07 December 2023
Accepted: 12 December 2023
Published: 10 January 2024
© Yifan Shi, Yuan Wang, Xiaozhou Liu and Ping Wang. Published in Railway Sciences.

This article is published under the Creative Commons Attribution (CC BY 4.0) licence. Anyone may reproduce, distribute, translate and create derivative works of this article (for both commercial and non-commercial purposes), subject to full attribution to the original publication and authors. The full terms of this licence may be seen at http://creativecommons.org/licences/by/4.0/legalcode
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