Results 21 to 30 of about 357 (162)
A Cascaded Defect Detection Algorithm for Track Components
Kongzhi Yu Xinxi Jishu, 2022 Track component defect detection has long faced the problem of scarcity of defect samples. In the case of insufficient defect samples, the existing deep learning methods are prone to overfitting the model, and the generalization performance is poor ...
LIN Jun +5 more
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Accelerating, guiding, and compressing skyrmions by defect rails [PDF]
Nanoscale, 2019 Magnetic skyrmions can be guided along rails made by line defects while their speed increased by a factor of ten.
Josep Castell-Queralt +4 more
openaire +3 more sources
Characterization and mitigation of wheel-rail impact at a singular rail defect
Journal of Vibration and Control, 2022 Wheel-rail impact, which arises from structural discontinuities and short-wave defects, becomes more serious with higher train speeds and larger axle loads. The large impact load can accelerate the deterioration of vehicle-track components and induce a high level of impact noise.
Hongyu Tao, Pan Zhang
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Thermal non-destructive characterization of rail networks by using Infrared Thermography and FEM simulation [PDF]
MATEC Web of Conferences, 2022 Because of the repeated passage of trains, anomalies are created inside the rails in the form of cracks of different shapes and position. These are due essentially to the wheel – rail contact. They present a hazard causing at the final stage rail failure,
Noufid Abdelhamid +4 more
doaj +1 more source
Signature analysis on wheel-rail interaction for rail defect detection [PDF]
4th IET International Conference on Railway Condition Monitoring (RCM 2008), 2008 Fibre Bragg Grating (FBG) sensors have been installed along an existing line for the purposes of train detection and weight measurement. The results show fair accuracy and high resolution on the vertical force acted on track when the train wheels are rolling upon. While the sensors are already in place and data is available, further applications beyond
Ho, Mark +7 more
openaire +1 more source
A Review of NDT Methods for Wheel Burn Detection on Rails
Sensors, 2023 Wheel burn can affect the wheel–rail contact state and ride quality. With long-term operation, it can cause rail head spalling or transverse cracking, which will lead to rail breakage.
Yanbo Zhang +4 more
doaj +1 more source
Ultrasonic imaging of buried defects in rails
NDT & E International, 2023 The present work addresses the ultrasonic NDT of rails, more precisely of the rail foot. The practical constraint is that transducers must be located on the rail head, whereas the region of interest is the rail foot. Thus, there is no direct acoustic path between the transducers and the region of interest.
Samuel Rodriguez +4 more
openaire +4 more sources
A Review on Rail Defect Detection Systems Based on Wireless Sensors
Sensors, 2022 Small defects on the rails develop fast under the continuous load of passing trains, and this may lead to train derailment and other disasters. In recent years, many types of wireless sensor systems have been developed for rail defect detection. However,
Yuliang Zhao +8 more
doaj +1 more source
INFLUENCE OF CONTACT STATE ON PROPAGATION PATH OF RAIL SURFACE CRACK
Jixie qiangdu, 2022 In order to investigate the formation mechanism of fishhook shaped spalling defect on rail surface, the fatigue calculation model of wheel/rail rolling contact was established and the prediction method of crack propagation path was proposed based on the ...
MENG RuiJun, ZHAO Rui, WEI XiaoGang
doaj
On the Use of Microwave Holography to Detect Surface Defects of Rails and Measure the Rail Profile [PDF]
Sensors, 2019 The use of microwave holography for detecting rail surface defects is considered in this paper. A brief review of available sources on radar methods for detecting defects on metal surfaces and rails is given. An experimental setup consisting of a two-coordinate electromechanical scanner and a radar with stepped frequency signal in the range from 22.2 ...
Andrey V. Zhuravlev +4 more
openaire +3 more sources