An Intelligent Methodology for Railways Monitoring Using Ultrasonic Guided Waves

Moustakidis, Serafeim; Kappatos, Vassilios; Karlsson, Patrik; Selcuk, Cem; Gan, Tat-Hean; Hrissagis, Kostas

doi:10.1007/s10921-014-0264-6

Cited by 38 publications

(29 citation statements)

References 22 publications

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“…Advantages of such a technique were successfully demonstrated on the long range applications for rapid screening of pipes [9][10][11][12], rails [13,14] and transmission lines [15]. At present, UGW technology is used primarily to detect and locate defective areas.…”

Section: Introductionmentioning

confidence: 99%

Ultrasonic Guided Wave Propagation through Welded Lap Joints

Jankauskas

Mažeika

2016

Metals

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Abstract:The objective of the research presented here is the investigation of ultrasonic guided wave (UGW) propagation through the lap joint welded plates used in the construction of a storage tank floors. The investigations have been performed using numerical simulation by finite element method (FEM) and tested by measurement of the transmission losses of the guided waves transmitted through the welded lap joints. Propagation of the symmetric S 0 mode in the welded stainless steel plates in the cases of different lap joint overlap width, operation frequency, and additional plate bonding caused by corrosion were investigated. It was shown that the transmission losses of the S 0 mode can vary in the range of 2 dB to 8 dB depending on the ratio between lap joint width and wavelength. It was also demonstrated that additional bonding in the overlap zone caused by corrosion can essentially reduce transmission losses.

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Section: Introductionmentioning

confidence: 99%

Ultrasonic Guided Wave Propagation through Welded Lap Joints

Jankauskas

Mažeika

2016

Metals

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“…This process attempts to compensate for temperature induced variations in group velocity. Attenuation and energy scaling [4] was then performed to compensate for variations in transducer sensitivities with temperature and to remove the exponential decay that would render effects from further defects to be smaller. Once the signal envelopes had been pre-processed, the envelopes were multiplied by a constant frequency sine wave of arbitrary frequency.…”

Section: Signal Processing and Resultsmentioning

confidence: 99%

Monitoring the reflection from an artificial defect in rail track using guided wave ultrasound

Loveday

Taylor

Long

et al. 2018

AIP Conference Proceedings

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Abstract. Guided wave ultrasound has the potential to detect relatively large defects in continuously welded rail track at long range. As monitoring can be performed in near real time it would be acceptable to only detect fairly large cracks provided this is achieved prior to complete rail breakage. Heavy haul rail lines are inspected periodically by conventional ultrasound and sections with even relatively small cracks are removed; therefore, no sizable defects are available to demonstrate monitoring in the presence of realistic environmental operating conditions. Instead, we glued a small mass to the rail to simulate reflection from a crack and monitored the guided wave signals as the glue joint deteriorated over time. Data was collected over a two week period on an operational heavy haul line. A piezoelectric transducer mounted under the head of the rail was used in pulse-echo mode to transmit and receive a mode of propagation with energy confined mainly in the head of the rail. The small mass was attached under the head of the rail, at a distance of 375m from the transducer, using a cyanoacrylate glue, which was not expected to remain intact for long. Pre-processing of the collected signals involved rejection of signals containing train noise, averaging, filtering and dispersion compensation. Reflections from aluminothermic welds were used to stretch and scale the signals to reduce the influence of temperature variations. Singular value decomposition and independent component analysis were then applied to the signals with the aim of separating the reflection caused by the artificial defect from the background signal. The performance of these techniques was compared for different time spans. The reflection from the artificial defect showed unanticipated fluctuations.

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“…Next, we present a mathematical estimate of the dependence of the appearance of additional vibrational modes in a rail due to the formation of a defect in it by the example of the calculation of standing waves depending on the position of the defect in the rail scourge. For ease of calculation, the length of the rail is taken equal to 1 m. The calculation is given by expression (1). We will carry out the calculation for a "cracked" defect, and simulate this defect using an example of gash in a rail of various sizes [7].…”

Section: Math Modelingmentioning

confidence: 99%

“…Currently, for the implementation of robotic flaw detection systems, various systems are used, including both GPR, ultrasound and laser systems [1][2][3][4]. But these systems cannot solve the problems of detecting defects at high speed, which leads to an increase in the cost of work and an overall decrease in the efficiency of such systems.…”

Section: Introductionmentioning

confidence: 99%

Analysis and Development of a Digital Radar Flaw Detector for Robotic Defect Detection Systems

Potylitsyn

Kokhonkova

Romanov

2019

2019 International Siberian Conference on Control and Communications (SIBCON)

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The purpose of this study is to develop a software and hardware complex for robotic defect detection systems, which will reduce the measurement time and reduce labor costs. The main method of detecting defects in this article is the registration of the effect of a change in the resonant frequency of oscillations of rail lashes due to the formation of defects. Simulation and evaluation of the effect of linear dimensions of defects for a regular cylinder and a sphere is given. It is shown that even defects with sizes up to 1 mm give frequency shifts for the first harmonic up to 10 Hz, and also data are given on the formation of additional oscillatory modes from the position of the defect relative to the edges of the rail lash. The second part of the article contains materials on the development of software and hardware for recording vibration data by a radar method Keywords-robotic system, radar method, defectoscopy, railway rails, frequency of free oscillations, acoustic waves.

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An Intelligent Methodology for Railways Monitoring Using Ultrasonic Guided Waves

Cited by 38 publications

References 22 publications

Ultrasonic Guided Wave Propagation through Welded Lap Joints

Ultrasonic Guided Wave Propagation through Welded Lap Joints

Monitoring the reflection from an artificial defect in rail track using guided wave ultrasound

Analysis and Development of a Digital Radar Flaw Detector for Robotic Defect Detection Systems

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