Technology for Measurement and Diagnosis. Development of Measuring Apparatus for Contact Wire Wear Using Sodium Vapor Lamps.

Nagasawa, Hiroki; Fukutani, Takahiro; Kusumi, Shunichi

doi:10.2219/rtriqr.41.117

Cited by 4 publications

(2 citation statements)

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“…The significant disadvantage of this method is informational limitation of the regular signal received. Being high-performance these systems [3] are not capable to detect and correctly determine such defects as a "turn" or a "neck" defect and can not process a big set (up to four) of contact wires in one catenary suspension system.…”

Section: Flaw Detection Problemmentioning

confidence: 99%

“…Detection of a contact wire wear and defects of a railroad network is one of the urgent problems taking effective solution. A number of automated systems [1][2][3] utilized by the industry that detect the wear on the go using the noncontact method are put into operation on Italian, Germany and Japanese railroads. At the present time there is no functional automated system in Russia, which meets construction features and operational conditions of our railroads with total length at about 100000 km.…”

Section: Introductionmentioning

confidence: 99%

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Automatic High-Speed Optoelectronic System for Dimensional Inspection of Distant Articles in Industry and Transport

Kalikin

Verkhogliad

Kalichkin

et al. 2010

KEM

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Advanced automated optoelectronic system for contact wire wear inspection on the go using a structured light method is presented. The algorithm of the video stream analysis and approaches to its implementation using high-performance electronic equipment are given. The automated system described has allowed measuring wear parameters with 10 mm interval at the inspection wagon velocity of 60 km per hour. The root-mean-square error for the measurements of the remaining height and contact plot constitutes 0.15 and 1.5 mm2 correspondently that allows one to make a considered decision about changing a worn section of a contact wire network. The system also can be utilized to inspect public transportation network and to measure the geometric parameters of cables and tubes being fabricated with rolling technique.

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Section: Flaw Detection Problemmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Automatic High-Speed Optoelectronic System for Dimensional Inspection of Distant Articles in Industry and Transport

Kalikin

Verkhogliad

Kalichkin

et al. 2010

KEM

View full text Add to dashboard Cite

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Development of measuring apparatus for contact wire wear by sodium vapor lamps

Kusumi

Nagasawa²,

Mochizuka³

Proceedings of the 17th IEEE Instrumentation and Measurement Technology Conference [Cat. No. 00CH37066]

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Performance requestsIn electric railways in Japan, inspection cars are running at commercial speed, in order to measure wear of contact wires. We have developed an apparatus to measure the contact wire wear with a light source of sodium vapor lamps of simpler mechanism and smaller size than that of current apparatus. This appa- ratus measures the width of wear surface by an optical method, and converts it into a residual height, This apparatus has been used for JR Yamagata Shinkansen in JR. On the other hand, we miniaturized this apparatus further, and developed an overhead contact line inspection system for rail-and-road cars. The results of field tests show that it can be used at a standard deviation of measuring error of 0.3 mm in daytime.The apparatus should have the following performance.(1) It can be used in daytime.(2) The measurement frequency is 500Hz or over to make (3) The measurement range for horizontal deviation is (4) It Can meaSUre maximum four Wires at the Same time. 2.2. The method of measurement the measuring pitch 70" in 130kmh running. 700".In Japan, the cross section of the contact wire has a circular shape with two grooves. Fig. 1 shows the cross section of the contact wire. The wear surface of contact wire becomes flat due to the sliding of pantograph and the size in the direction of height decreases. To measure the

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Improvement of Methods and Tools for Overhead Contact Lines Diagnostics

Pereverzyev

2020

MEC

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This paper describes developments of tools and methods in a wear of contact wire aspect, based on optical diagnostic systems and computer vision. In general, such diagnostic systems contribute towards improved service quality, reduced costs and increased security in railways. The contact wire is an important part of the OCL. It interacts with the pantographs which are mounted on the roof of trains and moving at various speeds. It is subject to abrasion, friction, scraping, corrosion, erosion, vibration, arcing and welding at different degrees of severity depending on the wire and collector strip materials, modes of interaction and the environmental conditions that defines the wear of contact wires. Measuring systems which automatically detect the degree of wire wear are necessary in order to carry out efficient OCL infrastructure management and condition-based maintenance of contact wire. The problem of wear measurement characterized by some important determining factors like lighting conditions, background scenery and the disparity of reflexives properties of the contact wire. Besides, in order to conduct an efficient inspection, the measures have to be carried out in a changing speed of inspection train. Finally, an important issues for designing and developing measurement systems are the number of wire in measurement range. Systems have to be able to measure not less than four contact wires which are simultaneously in a range of vision and the contact wire geometric parameters such as height and displacement (stagger). The measuring systems have to acquire, process and store a considerable amount of data in real time. Due to the amount of information to be processed, a high-performance architecture and effective algorithms are needed for real-time monitoring. The hardware and software modernization of a high-speed laser system for a contact wire parameters measurements are examined. Such modernization is fulfilled mostly by implementing a real-time high-speed compression algorithms and using LED backlighting. The results of the measurement of the contact wire’s wear obtained by a modernized high-speed laser system during an inspection trips on a new modern laboratory-car are given in this article. Keywords:, optical diagnostic systems, LED emitter,overhead contact lines of railways

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Technology for Measurement and Diagnosis. Development of Measuring Apparatus for Contact Wire Wear Using Sodium Vapor Lamps.

Cited by 4 publications

References 0 publications

Automatic High-Speed Optoelectronic System for Dimensional Inspection of Distant Articles in Industry and Transport

Automatic High-Speed Optoelectronic System for Dimensional Inspection of Distant Articles in Industry and Transport

Development of measuring apparatus for contact wire wear by sodium vapor lamps

Improvement of Methods and Tools for Overhead Contact Lines Diagnostics

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