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 

作者机构：Track Reasearch LabSchool of Civil EngineeringSouthwest Jiaotong University(SWJTU)ChengduChina Shenzhen EboRail Technology Co.Ltd.ShenzhenChina College of Urban Transportation and LogisticsShenzhen Technology UniversityShenzhenChina The Hong Kong Polytechnic UniversityHung HomChina 

出 版 物：《Railway Sciences》 (铁道科学（英文）)

年 卷 期：2024年第3卷第1期

页      面：69-83页

学科分类：08[工学] 0814[工学-土木工程] 082301[工学-道路与铁道工程] 0823[工学-交通运输工程] 

主　　题：Rail weld joint Inertial reference method Short-wavelength irregularities Multi-point chord reference method 5-m wavelength range 

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 ***/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 *** – 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 ***/value – The research compare two methods’ measurement effects in a longer wavelength rangeand demonstrate the superiority of MCR-method.