Rail Corrugation Broadband Measurement Based on Combination-Chord Model and LS

Li, Yan‐Fu; Liu, Hongli; Ma, Ziji; Wang, Chao; Zhong, Xiaoyun

doi:10.1109/tim.2017.2789067

Cited by 18 publications

(4 citation statements)

References 14 publications

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“…The accuracy of this method can reach 85-90% or higher. Li et al [79] developed a combination-chord model for data sharing. This model is used to measure rail corrugations from 30 mm to 60 m. It combines the advantages of the longwave corrugation measurement of the two-point string model and the shortwave corrugation measurement of the three-point asymmetric string model, and cleverly realizes the broadband waveform measurement of a three-point asymmetric string platform.…”

Section: Other Methodsmentioning

confidence: 99%

Concise Historic Overview of Rail Corrugation Studies: From Formation Mechanisms to Detection Methods

Wang,

Huang,

Wang

et al. 2024

Buildings

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Rail corrugation is a serious problem in a railway transportation system, aggravating the operational risk and shortening the lifetime of train–track system. In order to ensure the safety and reliability of the railway system, the detection of rail corrugation is very important. Thus, this study systematically summarizes the recent research progress of rail corrugation. First, this study introduces the definition of rail corrugation and the classification criteria. Then, the formation mechanism of rail corrugation is analyzed in detail, and its adverse consequences are investigated. Further, this study summarizes several main detection methods, which are corrugation-detection methods based on acceleration measurements, wavelet transform methods for corrugation evaluation, computer-vision-based methods for corrugation automatic detection, digital filtering algorithms for rail corrugation detection, and others. In this study, the formation mechanism and detection methods of rail corrugation are systematically described, and various corrugation-detection methods are also introduced in detail. This study not only provides a scientific basis for railway maintenance, but also lays a solid foundation for future experimental design and data analysis. This study can also guide engineering practice to improve the reliability and safety of railway systems. It also provides useful experience for future railway-engineering design and planning, as well as safer and more reliable operation. In general, this study can provide technical support for the detection of rail corrugation to ensure the safety of the rail–track system.

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Section: Other Methodsmentioning

confidence: 99%

Concise Historic Overview of Rail Corrugation Studies: From Formation Mechanisms to Detection Methods

Wang,

Huang,

Wang

et al. 2024

Buildings

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“…The chord is supported by the first and the third detecting points on the rail, and the distance from the middle detecting point b to the chord a c is taken as the chordbased measurement value   yx. Then, with a corresponding inverse filtering, the real rail corrugation is acquired [10]. The effective waveband of measurable corrugation for 3SCM…”

Section: A Rail Corrugation Measurement Methodsmentioning

confidence: 99%

Vision-Based Position Deviation Measurement of Rail Corrugation Chord Measuring Points Under Bi-Linear Laser Assistance

Chen

et al. 2021

IEEE Access

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During the dynamic measurement of chord-based rail corrugation, with the interferences of curve rail and train snaking movement, it is hard to ensure that the measuring points on the rail surface can trace the railhead centerline well the whole time. This introduces the position deviations to the measurement system, and leads to the measurement results cannot reflect the true rail irregularity state. To solve the problem, a position deviation measurement method based on the assistance of bi-linear laser is proposed in this paper. First, by means of three verifications composed of color, dimension and position, the laser stripe regions on railhead are located from original image effectively. Then, by suppressing stripe highlight texture and modifying the traditional Steger algorithm with flexible-widths Gaussian template, we extract the laser stripe centerline accurately, and depict the railhead boundary fast. Last, by locating three chord-based measuring points and calculating the distances from them to the railhead centerline, we obtain the position deviations of each point. The efficiency and superiority of proposed method are verified by vast experiments. The results show that the accuracy of the position deviation of the chord-based measuring points is limited within 0.4mm. INDEX TERMS Bi-linear laser assistance; chord-based method; vision-based measurement; position deviation; rail corrugation.

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“…However, in the conventional midpoint chord method, when the chord length used for measurement is 2k times the wavelength of the rail irregularity (where k = 0, 1, …), the amplitude gain response becomes zero. When such data are fed into the model recursively, errors gradually accumulate, causing the measurement results to deviate from the actual values and significantly affecting measurement accuracy (Wang, Xu, Zhou, Li, & Chen, 2012; Wang, Xu, Chen, Xiao, & Wang, 2015; Liu, 2016; Xu, Wang, Wang, & Xiao, 2016). These chord methods typically refer to single-point chord reference systems or simplified multi-point chord reference systems (Chen, Xu, Zhou, & Chen, 2011; Mao, Xu, & Zhou, 2013; Yin, Zhu, Wang, Wu, & Jin, 2017).…”

Section: Test Information Overviewmentioning

confidence: 99%

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

Shi,

Wang,

Liu

et al. 2024

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PurposeStraightness 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/approachIn 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.FindingsThe 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/valueThe research compare two methods’ measurement effects in a longer wavelength range and demonstrate the superiority of MCR-method.

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Rail Corrugation Broadband Measurement Based on Combination-Chord Model and LS

Cited by 18 publications

References 14 publications

Concise Historic Overview of Rail Corrugation Studies: From Formation Mechanisms to Detection Methods

Concise Historic Overview of Rail Corrugation Studies: From Formation Mechanisms to Detection Methods

Vision-Based Position Deviation Measurement of Rail Corrugation Chord Measuring Points Under Bi-Linear Laser Assistance

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

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