3D machine vision system for inspection of contact strips in railway vehicle current collectors

Jarzębowicz, Leszek; Judek, Sławomir

doi:10.1109/ae.2014.7011686

Cited by 32 publications

(12 citation statements)

References 7 publications

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“…The possibility to work in reverse mode, as generators of electric energy, is a characteristic feature of electric motors [3][4][5][6]. It allows to change kinetic energy of a vehicle into electric energy, which can then be returned to the traction supply system and consumed by other vehicles.…”

Section: Bilateral Supply Systemmentioning

confidence: 99%

Bilateral power supply of the traction network as a first stage of Smart Grid technology implementation in electric traction

Bartłomiejczyk

2018

MATEC Web Conf.

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Section: Bilateral Supply Systemmentioning

confidence: 99%

Bilateral power supply of the traction network as a first stage of Smart Grid technology implementation in electric traction

Bartłomiejczyk

2018

MATEC Web Conf.

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“…However, in order to increase the resolution of height determination, more sophisticated algorithms are usually used, e.g. center-of-gravity method, which is featured by 1/16 subpixel resolution [8].…”

Section: Laser Scanning Inspection Systemmentioning

confidence: 99%

“…LSIS applies Ranger E camera with an image sensor resolution of 1536/512 pixels, and recording frequency up to 35,000 frames/s [8]. Dimensions of typical CCS and LSIS measurement resolution resulting from a designated spatial setup are presented in Table I.…”

Section: Laser Scanning Inspection Systemmentioning

confidence: 99%

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Analysis of Measurement Errors in Rail Vehicles’ Pantograph Inspection System

Judek¹,

Jarzębowicz²

2016

ElAEE

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The paper presents an approach to evaluation of height measurement errors in laser scanning inspection system. The system, consisting of a laser line generator and a specialized camera, is dedicated to diagnosing carbon contact strips of railway vehicles' pantographs. While height measurement resolution is easily computable based on system parameters, determining the measurement error is troublesome due to numerous impacts. As width-to-height ratio of the scanned object is very high, typical patterns applied in references for error determination cannot be used. A set of real-case contact strips have been selected and used as patterns for determining scanning system errors. Both peak and RMS errors have been quantified to evaluate accuracy of wear estimation and defect identification, respectively. Index Terms-Current collector; fault diagnosis; measurement by laser beam; pantograph; railway transportation.http://dx.

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“…In contrast, diagnostics of current collectors is usually performed with the use of stationary diagnostic stands, where static characteristics of the collector and suspension of the slipper are tested [9]. Evaluation of the technical condition of strips is carried out using 3D visualization devices [10][11][12][13]. On the other hand, correctness of cooperation between the collector and the contact line can be monitored with the use of stationary measurement points which help to determine the correctness of the collector's adjustments based on displacements of the contact line caused by its impact when a vehicle passes through the diagnostic stand.…”

Section: Introductionmentioning

confidence: 99%

Experimental verification of visual method for measuring displacements of contact line elements

Skibicki

2018

MATEC Web of Conferences

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Abstract. The increase of rail vehicles speed, as well as the increase of their power, puts high demands on the power delivery system for traction vehicles The most critical point in the vehicle's power supply circuit is the contact between the current collector and contact wires. Ensuring a reliable co-operation of the current collector and contact line, requires technical development of the contact line and current collector construction, as well as improvement of diagnostic systems of these components. This is translated into the need to develop new measurement methods, which allow for more complete definition of the parameters of these elements of traction vehicle power supply system. Each new measurement method requires verification, performed by calibrating or comparing the results with another measurement method which has already been tested. The article presents results of experimental verification of a visual method for measuring the displacement of contact wires, with a proven method based on short range laser rangefinders and calliper as reference measurement.

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3D machine vision system for inspection of contact strips in railway vehicle current collectors

Cited by 32 publications

References 7 publications

Bilateral power supply of the traction network as a first stage of Smart Grid technology implementation in electric traction

Bilateral power supply of the traction network as a first stage of Smart Grid technology implementation in electric traction

Analysis of Measurement Errors in Rail Vehicles’ Pantograph Inspection System

Experimental verification of visual method for measuring displacements of contact line elements

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