• Title, Summary, Keyword: 검측차

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A Study of Analysis Method for the Track geometry measuring data on High Speed Railway (고속철도 궤도검측자료 분석기법에 관한 연구)

  • Kang, Kee Dong
    • Journal of Korean Society of Steel Construction
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    • v.18 no.1
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    • pp.47-51
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    • 2006
  • Measuring the track geometry of a high-speed railway is the most important task in track construction and track maintenance work. Measuring accuracy is particularly sign the formulation of the maintenance plan and in the assessment of the work quality, and because it can set the train speed limit. To determine the track geometry of a high-speed railway, it is important to use KNR's track recording coach (EM-120). According to the result of the spectrum analysis, noise near the 1-m wave band was found on the track recording data. A new filter was thus applied to remove the noise from the track recording data. A similar result can be acquired when this method is used in real track geometry.

Study on the Maintenance Cost of Railway Infrastructure Using Line Classification and TMV Data (선로등급 및 검측차 검측정보를 고려한 철도시설 유지보수비용 산정에 관한 연구)

  • Kim, In Kyum;Lee, Jun S.;Choi, Il Yoon;Lee, Hoo Seok
    • Journal of the Korean Society for Railway
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    • v.20 no.2
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    • pp.275-287
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    • 2017
  • During the feasibility study of new rail lines, maintenance cost of railway infrastructure has mostly been estimated based on the track length and on simplified parameters; however, the estimation reliability can be improved by employing the correction factor from UIC 715, as well as the line classification in UIC 714. The correlations between maintenance cost and various parameters such as weighted track length based on line classification, radius of curvature, gradient and worn -out rate have been analyzed according to the case studies. Prediction of the maintenance cost has been carried out using the cost data, which were representative of the whole cost data; as a result, it was demonstrated that a cost model based on the line classification and the correction factor was more reliable than the existing models. Furthermore, possibilities of using data from both the track measurement vehicle and from the maintenance information system, which are under development, have been investigated and, based on this investigation, a combined cost model using line classification, radius of curvature, gradient and worn-out rate, among other factors, will be proposed in the near future.

Development of the Program for Reconstruction Profile of Track using the measured Data from EM120 (검측차(EM120) 측정결과를 이용한 원형틀림 복원 프로그램 개발)

  • 정우진;구병춘
    • Proceedings of the KSR Conference
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    • pp.666-671
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    • 2002
  • All work related to maintenance of track has been impletemented on the basis of the measured result from EM series cars in Korea. However, since these types of cars measure only versine value of the track irregularities instead of the real ones, this method will cause the confusion to maintenance operators if commercial speed should increase. This study was showing and explaining the program developed to get the real irregularities from the versine value. Finally, the reconstruction profiles completed by two different methods were compared with artificial track irregularities to confirm the their practicality.

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Technical Trend of Track Irregularities Measuring Systems and Its Application (궤도 검측 시스템의 현황과 응용)

  • Kim, Sang-Soo;Kim, Young-Mo;Han, Young-Jea;Park, Choon-Su
    • Proceedings of the Korean Society for Noise and Vibration Engineering Conference
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    • pp.139-142
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    • 2005
  • High speed railway, KTX has started commercial service last you and passengers is increasing. To secure the safety and reliability of high speed railway, it is necessary to inspect and maintain the rail regularities. Several methods of measuring track irregularities are developed in other railway advanced countries. In this paper, we introduce foreign track Inspection methods and application scheme to Koreans.

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Comparison of Track Recording with Surveying in Track irregularity Measurement (궤도틀림의 검측값과 측량결과 비교)

  • Lee, Jee-Ha;Choi, Ii-Yoon;Kim, Bak-Jin
    • Proceedings of the KSR Conference
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    • pp.1090-1095
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    • 2008
  • Track geometry changes by traffic loads. The bigger the changes are, the worse the riding comfort and running stability of train. This is so-called track irregularity and is the most important quality parameters of ballasted track. To objectively assess track irregularity, track geometry should be able to be measured. Practically, railway companies use moving chord method, which determine versine values via a chord. The versine is the vertical distance to curve measured in the middle of the chord. This type of method measures only versine of track irregularity curve by transfer function from the characteristics of measuring device. In this report, review the characteristics of two types of measuring tools by comparing the measurements. The one is GRP-1000 system, optical surveying system with Total station and lazar prism trolley. This calculates track geometry by surveying absolute coordinates of two points each on both rail heads. The other is EM-120, measures versine with 10m of symmetrical chord length.

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A Study of Analysis Method for the Track Geometry Measuring Data on High Speed Railway (고속철도 궤도검측 자료 분석기법에 관한 연구)

  • 강기동
    • Journal of the Korean Society for Railway
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    • v.7 no.4
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    • pp.291-295
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    • 2004
  • The Track geometry measuring on High-speed railway is the most important subject for the track construction and track maintenance work. Also the measuring accuracy is so significant part because it provides principle data for the maintenance plan and the assesment of working quality and can control the train speed limitation. From this point of view, it is very important to verify for the track recording coach(EM120) in KNR. According to the result of spectrum analysis, the noise near 1m waveband was found on the track recording data from EM120. So, New filter has been applied to remove the noise form track recording data. and it makes possible to acquire resembling result to real track geometry.

A Study of the Long Wave Track Defect Analysis for High Speed Railway (고속철도의 장파장 제도틀림 분석에 대한 연구)

  • Kang Kee-Dong
    • Journal of the Korean Society for Railway
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    • v.8 no.2
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    • pp.111-115
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    • 2005
  • The Study provides the technical background and calculation method f3r the long wave track defect. On high speed railway, It is necessary to manage the long wave band up to 80m track defect fur improving a riding quality. For this reason, Track recording methods for highspeed railway are used 10m and 30m recording bases, these are covered middle wave band and long wave band successfully. Extended base recording data is calculated by geometrical model and this data provides a good result for KTX riding index.

An Analysis of Electric Noise of Railway Electric Inspection Car Measurement Module (종합검측차 검측모듈의 차상노이즈 분석)

  • Park, Young;Kwon, Sam-Young;Cho, Chul-Jin;Chae, Won Kyu;Lee, Jae-Hyeong
    • The Transactions of The Korean Institute of Electrical Engineers
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    • v.64 no.5
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    • pp.812-816
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    • 2015
  • Recently, various monitoring systems have been proposed to detect interaction performance between trains and infrastructure, as well as, various techniques to improve the accuracy and performance of such inspection equipment in high speeds. Especially, it is important to predict electric noise of high speed trains due to its effect on detection system accuracy. In this paper, we analyze various types of electrical noise in electric vehicles to improve the accuracy of the detection module of the inspection car. In detail, analysis of electric noise of high speed railway is performed as a function of speed based on field tests that were carried out by HEMU-430X (Highspeed Eletric Multiple Unit - 430 km/h eXperiment).

Characteristics of Track Irregularities on Kyoungbu High-speed Line (경부고속선 궤도틀림 분포특성)

  • Choi, Il-Yoon;Lee, Jun S.;Um, Ju-Hwan;Kang, Tae-Ku;Choi, Min-Ji
    • Journal of the Korean Society for Railway
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    • v.18 no.1
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    • pp.63-70
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    • 2015
  • Track irregularities have a strong influence on the safety and the ride comfort of trains as well as track maintenance work. A statistical analysis was conducted for track irregularities data measured in Kyoungbu high speed line using a track recording car(EM120). First, the characteristics of EM120, which adopted versine measurement system, were investigated and the transfer function of EM120 was examined. The distributions of the surface and the alignment which have short wavelength were considerably high and the distribution decreased as wavelength increases. A distribution analysis of the wavelength was carried out according to EN standards and most of the track irregularities were in a D1 wavelength range. The distributions of the amplitude of track irregularities were also investigated and the results show that the distributions of track irregularities decrease rapidly as amplitude increases. These results may be helpful in making track maintenance plans and revising track irregularities criteria.