Results 171 to 180 of about 6,809 (207)
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Application of FTP in flaw detection of rail web
Optik, 2014Abstract In this paper, the author aims to use the Fourier transform profilometry, a three-dimensional non-contact optical measurement method, for recovering the rail profile and defects on the rail web. The deformed fringe pattern, caused by the uneven distribution of the surface's height when a Ronchi grating is projected onto the rail's surface ...
Sheng-xi He +3 more
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Kontrol'. Diagnostika, 2021
The article is devoted to the question of rail ultrasonic testing confidence. At present there is a range of flaw orientation angles in within which the testing is absent and, therefore such flaws can be lost. To except this drawback the current sound testing scheme in flaw detector railcars is to be supplemented with inclined probes exciting ...
A. A. Markov +3 more
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The article is devoted to the question of rail ultrasonic testing confidence. At present there is a range of flaw orientation angles in within which the testing is absent and, therefore such flaws can be lost. To except this drawback the current sound testing scheme in flaw detector railcars is to be supplemented with inclined probes exciting ...
A. A. Markov +3 more
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Rail Flaw Detection Technologies for Safer, Reliable Transportation: A Review
Journal of Dynamic Systems, Measurement, and Control, 2017This paper delivers an in-depth review of the state-of-the-art technologies relevant to rail flaw detection giving emphasis to their use in detection of rail flaw defects at practical inspection vehicle speeds. The review not only looks at the research being carried out but also investigates the commercial products available for rail flaw detection. It
Alahakoon, S +3 more
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Investigation on Structure & Dynamics of Rail Flaw Detection Vehicle
Applied Mechanics and Materials, 2013The rail flaw detection vehicle which is according to a city rail system construction features has been developed. This vehicle has been used for more than two years and all aspects of the vehicle performance reaches design requirements. The vehicle can meet the demand for rail flaw detection.
Qi Gang Yuan, Ji Min Zhang, Li Wen Man
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Detection and classification of rail track flaws using inertial and magnetometric sensors
2018 IEEE Conference of Russian Young Researchers in Electrical and Electronic Engineering (EIConRus), 2018The team of the Department of Laser Measuring and Navigation Systems of SPbGETU LETI proposed a method for diagnosing surface defects based on inertial measurements. This approach was later introduced into the AVIKON-03M flaw detector car produced by the JSC “Radioavionika”, which was equipped with a set of micromechanical inertial modules for this ...
Alexander M. Boronakhin +4 more
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Detection of flaws in used railroad rail by ultrasonic inspection techniques
NDT International, 1979Abstract The qualitative differences in the responses of new and used rail to ultrasonic inspection have been known for some time. The material presented in this paper quantifies the actual responses obtained from a collection of four rail samples which are typical of rail used on United States' railways.
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Eye safety considerations of a laser-based rail flaw detection system
ILSC 2007: Proceedings of the International Laser Safety Conference, 2007The Transportation Technology Center, Inc. (TTCI), a subsidiary of the Association of American Railroads (AAR) and Tecnogamma, SPA are evaluating the efficacy of a non-contact, laser-based rail flaw detection system. Through the photo-acoustic effect, the absorption of nanosecond laser pulses by the rail results in the generation of both bulk and ...
Richard Hughes +2 more
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Use of Laser Ultrasonics for Rail Flaw Detection—An Insight into Preliminary Experiments
ICRT 2017, 2018There is an ever increasing demand for higher tonnages to be transported in heavy haul trains. This means that ensuring safety and reliability of rail tracks becomes an even more critical priority. Early detection of rail flaws ensures transportation safety and averts unplanned downtime.
S. Alahakoon +4 more
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Small-Scale Rail Flaw Detection Car Design and Damage Position Estimation
2017 International Conference on Sensing, Diagnostics, Prognostics, and Control (SDPC), 2017As China's railway transport system is getting busier and the trains are continually speeding up, the rails have to bear more and more heavy cyclic loads generated by the repeat force between the wheels and rails, and the internal damages are easier to be produced, which directly endanger the running safety.
Jinling Yao, Gang Yu
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Groundwork for Rail Flaw Detection Using Ultrasonic Phased Array Inspection
AIP Conference Proceedings, 2003An apparent increase in the detectability of certain flaws results when the ultrasonic inspection beam was oriented off the longitudinal axis of railroad rail. Here, artificial reflectors were used to better define the extent of material “seen” by inspection beams, and determine how surface curvature might affect the inspection.
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