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

作　　者：Yifan Shi Yuan Wang Xiaozhou Liu Ping Wang 

机构地区：[1]Track Reasearch Lab,School of Civil Engineering,Southwest Jiaotong University(SWJTU),Chengdu,China [2]Shenzhen EboRail Technology Co.,Ltd.,Shenzhen,China [3]College of Urban Transportation and Logistics,Shenzhen Technology University,Shenzhen,China [4]The Hong Kong Polytechnic University,Hung Hom,China

出　　处：《Railway Sciences》2024年第1期69-83,共15页铁道科学（英文）

摘　　要：Purpose – Straightness measurement of rail weld joint is of essential importance to railway maintenance. Dueto the lack of efficient measurement equipment, there has been limited in-depth research on rail weld joint with a5-m wavelength range, leaving a significant knowledge gap in this field.Design/methodology/approach – In this study, the authors used the well-established inertial referencemethod (IR-method), and the state-of-the-art multi-point chord reference method (MCR-method). Two methodshave been applied in different types of rail straightness measurement trollies, respectively. These instrumentswere tested in a high-speed rail section within a certain region of China. The test results were ultimatelyvalidated through using traditional straightedge and feeler gauge methods as reference data to evaluate the railweld joint straightness within the 5-m wavelength range.Findings – The research reveals that IR-method and MCR-method produce reasonably similar measurementresults for wavelengths below 1 m. However, MCR-method outperforms IR-method in terms of accuracy forwavelengths 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 rangeand demonstrate the superiority of MCR-method.

关 键 词：Rail weld joint Inertial reference method Short-wavelength irregularities Multi-point chord reference method 5-m wavelength range 

分 类 号：U21[交通运输工程—道路与铁道工程]