Results 121 to 130 of about 261 (168)
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The optimization of transducer layout in rail flaw detection
2015 IEEE Far East NDT New Technology & Application Forum (FENDT), 2015The railway is a kind of large volume public transportation, and more and more attention is paid to the safety of rails nowadays. As the rail is subject to heavy cyclic loads of trains, it is easily broken in the long-term operations, and this will seriously affect the safety of the trains. As an important rail flaw detection method, ultrasonic testing
Xiao-Rong Gao
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Rail flaw detection: overview and needs for future developments
NDT and E International, 2004Rail Flaw Detection has an important part to play in ensuring the safety of the world's railroads. Recent accidents caused by broken rails have focused attention on the technologies that enable the detection of flaws in railroad rail. This paper reviews the technologies currently employed, along with examples of recent field applications.
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Rail flaw detection system based on electromagnetic acoustic technique
2010 5th IEEE Conference on Industrial Electronics and Applications, 2010As a result of the development of higher speeds and heavier loads of rail networks, rail defects have been more serious than ever before. Current piezoelectric ultrasonic detection devices are often inadequate for rail inspection, due to high misjudgement or undetected error rate, and complex structure.
Guofu Zhai, Lei Kang
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Non-contact rail flaw detection system: first field test
SPIE Proceedings, 2007Researchers at UCSD, with the initial support of NSF and the current support of the Federal Railroad Administration (FRA), have been working on a flaw detection prototype for rails that uses non-contact ultrasonic probing and robust data processing algorithms to provide high speed and high reliability defect detection in these structures. Besides the
Ivan Bartoli +2 more
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Flaw detection in high speed train's rail based on EMD and PSD
2011 IEEE International Instrumentation and Measurement Technology Conference, 2011This paper proposes a new flaw detection method based on EMD and PSD with application to high speed train's rail. The signals in different scenarios are generated by utilizing the finite element model. In this paper, the empirical mode decomposition method is used to decompose the investigated signals into intrinsic mode functions and the flaw features
Xin Zhang, Yi Shen, Naizhang Feng
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Design of Auto-Centering System for High-Speed Rail Flaw Detection Vehicle
2018 37th Chinese Control Conference (CCC), 2018An auto-centering system for the ultrasonic detector of high-speed rail flaw detection vehicle is designed and tested. The following research contents are completed: 1. An auto-tracking sensor is designed; 2. The hardware and software systems for the highly real-time auto-tracking control system are designed; 3.
Ken Chen +3 more
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Reseach on Super-layer Image Detection Method for Rail Flaw
2021 IEEE Vehicle Power and Propulsion Conference (VPPC), 2021Hao Yuan
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PROBLEMS OF HIGH-SPEED RAIL FLAW DETECTION
Kontrol'. Diagnostika, 2021The main factors that reduce the quality of non-destructive testing of rails during high-speed scanning are considered. The most significant factors are the quality and volume of obtaining primary information about the condition of the monitored rails. It is shown that, at high-speed (up to 120 km/h) control, the compression of the defect location zone
A. A. Markov, E. A. Maksimova
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Vibration Signal Analysis For Rail Flaw Detection
2019 CAA Symposium on Fault Detection, Supervision and Safety for Technical Processes (SAFEPROCESS), 2019Rails are the foundation of rail transport, and any defects of the rails may directly affect the running state of the train or even lead to major safety incidents. However, the existing algorithms for rail crack detection are too expensive and difficult to perform on-line real-time monitoring.
Bin Li +3 more
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Detect the rail track flaw by estimating the camera shaking
17th International IEEE Conference on Intelligent Transportation Systems (ITSC), 2014In this paper, the authors present a method of detecting the rail track bends and flaws. Different from the traditional machine-vision based methods which analyze the images of the rail surface, the authors estimate the shake of the camera - which is caused by the flaw or bend of the rail track - from the video used for railway environment surveillance.
Liang Wang 0018 +4 more
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