Features of Contact Wire Wear and Measures for Local Wear on Simple Catenary with Copper-Steel Contact Wire

Tsunemoto, Mizuki; Harada, Shinji; Shimizu, Mitsuaki

doi:10.2219/rtriqr.48.83

Cited by 4 publications

(4 citation statements)

References 2 publications

(4 reference statements)

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“…The same method was employed to select the thresholds appearing in Eq. (7-10) and (12)(13)(14)(15)(16)(17).…”

Section: Error Correctionmentioning

confidence: 99%

“…(12), and for detection of error frames, respectively for each type of sequences, in Eq. (13)(14)(15)(16)(17). Starting from five incorrect measurement frames appearing in a sequence, the correction algorithm works only for type I and II of wrong measurement images.…”

Section: Error Correctionmentioning

confidence: 99%

“…Sometimes a combination of measurement current collectors and cameras is employed [4,7,11]. The measurement of contact wire wear is performed, as a rule, with the use of laser scanners [4][5][6][7][12][13][14].…”

Section: Introductionmentioning

confidence: 99%

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Robustness of contact-less optical method, used for measuring contact wire position in changeable lighting conditions

Skibicki

2017

Teh. vjesn.

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Original scientific paperThe article presents verification of robustness of contactless method based on 2D image camera, which is used to measure catenary contact wire position in changeable ambient lighting conditions. Robustness in changeable lighting conditions is ensured through the combination of advanced image processing for background information removal and the algorithm of error correction. This algorithm detects incorrect images and substitutes information from these images with proper measurement data obtained from correct images which precede and follow the incorrect one. The paper presents and discusses the processing algorithms used, as well as shows examples of measurement results obtained on a full scale laboratory stand. Keywords: contact line; diagnostic systems; electric traction; measurement systemsRobustnost bezkontaktne optičke metode korištene za mjerenje položaja žice spoja u promjenjivim uvjetima osvjetljenja Izvorni znanstveni članak U članku je prikazana provjera robustnosti bezkontktne metode utemeljene na 2D fotoaparatu, koja se koristi za mjerenje položaja žice spoja u promjenjivim uvjetima osvjetljenja okoline. Robustnost u promjenjivim uvjetima osvjetljenja osigurana je kombinacijom napredne obrade slike za uklanjanje pozadinskih informacija i algoritma ispravljanja pogrešaka. Ovaj algoritam otkriva netočne slike i nadomješta informacije s ovih slika s odgovarajućim mjernim podacima dobivenim od ispravnih slika koje prethode i slijede pogrešnu. Rad prikazuje i raspravlja o korištenim algoritmima za obradu, te pokazuje primjere rezultata mjerenja dobivenih na laboratorijskom mjernom pultu.

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“…The same method was employed to select the thresholds appearing in Eq. (7-10) and (12)(13)(14)(15)(16)(17).…”

Section: Error Correctionmentioning

confidence: 99%

Section: Error Correctionmentioning

confidence: 99%

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Robustness of contact-less optical method, used for measuring contact wire position in changeable lighting conditions

Skibicki

2017

Teh. vjesn.

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“…The local wear limit is achieved several times faster than that which is achieved over the rest of the length of the contact wire. The length of the local wear section is up to 0.5 m. The wear surface width is usually about 10 mm [1][2][3][4][5][6]. At present, on conventional railway lines, a worn-out section of a contact wire is cut out, and a piece of a new, not worn-out contact wire is inserted [7].…”

Section: Introductionmentioning

confidence: 99%

Properties of Cold Spray Coatings for Restoration of Worn-Out Contact Wires

Grigoriev

Гершман

et al. 2021

Coatings

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The influence of Cu-Al2O3-Zn powder mixtures for cold spraying on the properties of the coatings is studied. The coatings were deposited to restore worn-out copper contact wires, which were used as a substrate. The main parameters, such as adhesion, specific electrical conductivity, hardness, and wear resistance, were examined. The content of Al2O3 in the mixture varied from 30% to 60%, and the content of Zn, from 0% to 20%. The results obtained indicate that the 60Cu-40Al2O3 coating was the most adhesive and showed the best conductivity, while 40% Cu-50% Al2O3-10% Zn was found to be the most wear-resistant. The optimum spraying temperature was 500 °C.

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Analysis of measurement uncertainty for contact-less method used to measure the position of catenary contact wire, performed with the use of Monte Carlo method

Skibicki

Bartłomiejczyk

2017

Measurement

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Features of Contact Wire Wear and Measures for Local Wear on Simple Catenary with Copper-Steel Contact Wire

Cited by 4 publications

References 2 publications

Robustness of contact-less optical method, used for measuring contact wire position in changeable lighting conditions

Robustness of contact-less optical method, used for measuring contact wire position in changeable lighting conditions

Properties of Cold Spray Coatings for Restoration of Worn-Out Contact Wires

Analysis of measurement uncertainty for contact-less method used to measure the position of catenary contact wire, performed with the use of Monte Carlo method

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