Results 21 to 30 of about 1,967 (202)
A Study on Railway Surface Defects Detection Based on Machine Vision
Entropy, 2021 The detection of rail surface defects is an important tool to ensure the safe operation of rail transit. Due to the complex diversity of track surface defect features and the small size of the defect area, it is difficult to obtain satisfying detection ...
Tangbo Bai +3 more
doaj +1 more source
Известия высших учебных заведений России: Радиоэлектроника, 2022 Introduction. Efficient operation of a system for measuring rail surface short-wavelength irregularities depends on evaluation of the signal length with respect to travelled distances, i.e., the standard maximum defect length and the distance between the
A. V. Bolshakova +6 more
doaj +1 more source
An initial investigation on the potential applicability of Acoustic Emission to rail track fault detection. [PDF]
, 2004 In light of recent accidents in the rail industry, the assessment of the mechanical integrity of rail-track is of vital importance. This encompasses the integrity of the track due to rolling contact fatigue and surface wear. Whilst numerous techniques
Mba, David, Bruzelius, Kristoffer
core +1 more source
Near field enhancements from angled surface defects : a comparison of scanning laser source and scanning laser detection techniques [PDF]
, 2011 Enhancement of the Rayleigh wave signal amplitude at a surface defect, due to interference of incident, reflected and mode converted waves, has been reported by several authors, and it has been suggested that this could be used as a fingerprint of the ...
Edwards, R. S. (Rachel S.) +5 more
core +1 more source
Adaptive noise cancelling and time–frequency techniques for rail surface defect detection [PDF]
, 2015 Adaptive noise cancelling (ANC) is a technique which is very effective to remove additive noises from the contaminated signals. It has been widely used in the fields of telecommunication, radar and sonar signal processing.
Liang, B. +11 more
core +1 more source
Вестник Научно-исследовательского института железнодорожного транспорта, 2021 The review analyzes a monograph published by Springer Vieweg publishing house, which presents scientific approaches to the problems of defect formation in railway rails.
E. A. Shur
doaj +1 more source
Railway wheel-flat and rail surface defect modelling and analysis by time–frequency techniques [PDF]
, 2013 Damage to the surface of railway wheels and rails commonly occurs in most railways. If not detected, it can result in rapid deterioration and possible failure of rolling stock and infrastructure components causing higher maintenance costs.
Liang, B. +7 more
core +1 more source
The effects of surface defects on the fatigue of water and oil lubricated contacts [PDF]
, 2000 A study into effects of surface defects on the rolling contact fatigue of brass and rail steel has been undertaken on a twin-disc rolling-sliding test machine with both oil and water lubrication.
Gao, N., Dwyer-Joyce, R. S.
core +1 more source
Data fusion for defect characterisation using a dual probe system [PDF]
, 2008 We present recent work on a dual probe system containing electromagnetic acoustic transducers (EMATs) generating and detecting surface ultrasonic waves, and a pulsed eddy current (PEC) probe.
Dixon, S. +6 more
core +1 more source
MONITORING OF TRACK SECTIONS WITH LONG-PITCH CORRUGATION
Acta Polytechnica CTU Proceedings, 2016 The focus of this paper lies on monitoring of the track sections with rail corrugations caused by wheel sliding. Short waves on the running surface of the rail head on low rail are typical for this defect. Long-pitch corrugation is a significant cause of
Jan Valehrach, Jaroslav Šmíd
doaj +1 more source