Results 181 to 190 of about 1,967 (202)
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Defect detection on rail surfaces by a vision based system
IEEE Intelligent Vehicles Symposium, 2004, 2004A new vision based inspection technique for rail surface defects is presented. It replaces visual checks with an automatic inspection system. Colour line-scan cameras and a special image acquisition method- the so called spectral image differencing procedure (SIDP- allow the automatic detection of defects on rail surfaces, like flakes, cracks, grooves ...
E. Deutschl +3 more
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Defect detection in rails using ultrasonic surface waves
Insight - Non-Destructive Testing and Condition Monitoring, 2007Defects in rails caused by rolling contact fatigue (RCF) are of growing concern to the railway industry. Conventional ultrasonic inspection methods are often not reliable in detecting critical RCF defects. The aim of this work was to develop a reliable screening tool that discriminates between critical and tolerable defects and therefore complements ...
D Hesse, P Cawley
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Proceedings of the Institution of Mechanical Engineers, Part F: Journal of Rail and Rapid Transit, 2011
A validated three-dimensional (3D) transient finite element model is used to evaluate the wheel–rail impact at singular rail surface defects and the resulted high-frequency dynamic forces at the discrete supports of the rail. A typical ballasted railway track is modeled, in which the supports of the rail are composed of the fastenings, the sleepers ...
X Zhao, Z Li, J Liu
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A validated three-dimensional (3D) transient finite element model is used to evaluate the wheel–rail impact at singular rail surface defects and the resulted high-frequency dynamic forces at the discrete supports of the rail. A typical ballasted railway track is modeled, in which the supports of the rail are composed of the fastenings, the sleepers ...
X Zhao, Z Li, J Liu
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Multi-Structural Instrument for Identifying Surface Defects on Rails
Metallurgist, 2016A multi-structural instrument for identifying surface defects on rails has been developed. The instrument operates based on intelligent analysis of video data, and it opens up a wide range of possibilities for using neural-network analysis of images in real time.
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An adaptive clustering method detecting the surface defects on linear guide rails
International Journal of Computer Integrated Manufacturing, 2019Linear guides are widely used in automation, aerospace production, and medical care. It is currently one of the most concerning issues how to monitor its surface quality in the manufacturing proces...
Youhang Zhou +3 more
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Rail Defect Detection Using Ultrasonic Surface Waves
AIP Conference Proceedings, 2006Current testing of the rail network is limited in terms of both speed of testing and accuracy of detecting surface defects such as gauge corner cracking. By using ultrasonic surface waves generated and detected in a pitch‐catch manner we can detect such defects with a much higher accuracy.
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Rail Surface Defect Detection and Localisation System
SSRN Electronic Journal, 2023Binsiya C, Baburaj M
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Rail surface defect detection based on improved YOLOv8n
Engineering Research ExpressAbstract Rail surface defects such as scratches, spalling, cracks, wear, corrugation, and depressions pose serious risks to railway safety and require fast, reliable inspection. In practice, defect images often exhibit low contrast, strong texture noise, and large scale variations. These issues cause missed detections and false alarms,
Li Song, Dexin Song
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Deep Learning and Machine Vision-Based Inspection of Rail Surface Defects
IEEE Transactions on Instrumentation and Measurement, 2022Hongfei Yang +5 more
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