• Title, Summary, Keyword: ETCS

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Design of 3-D resonator for improvement of interference in ETCS (ETCS 신호 간섭 개선을 위한 3-D 공진기 설계)

  • Kim Ho-Yong;Lee Hong-Min
    • Journal of the Institute of Electronics Engineers of Korea TC
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    • v.43 no.9
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    • pp.99-104
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    • 2006
  • In this paper, the conventional 2 dimensional metamaterial structure has degeneration of shielding characteristic in cross polarization effect. The proposed 3-D resonator is designed for reduction of cross polarization effect. The proposed 3-D resonator using LTCC consists of 2-D parallel resonators on X-axis, Y-axis and Z-axis. The 2-D parallel resonator consists of two plate and one via. When the co-polarization electric filed is excited, the resonance frequency of 3-D resonator is 5.024GHz. The stop bandwidth is 19MHz. When the cross-polarization electric field is excited, the resonance frequency of 3-D resonator is 4.825GHz. The stop bandwidth is 19MHz. The proposed 3-D resonator achieve reduction of cross-polarization effect. The concrete consists of proposed 3-D resonator and absorbtion materials. The concrete will be applied for reduction or interference signal of ETCS(Electric Toll collection system).

An Analysis on the Emission Reduction Effect of Diesel Light-duty Truck by Introducing Electronic Toll Collection System on Highways (고속도로 영업소의 자동 요금 징수 시스템 도입에 따른 소형 경유 화물트럭의 배출가스 저감 효과 분석)

  • Park, Junhong;Lee, Jongtae;Lee, Taewoo;Kim, Jiyoung;Kim, Jeongsoo;Kil, Jihoon
    • Journal of Korean Society for Atmospheric Environment
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    • v.28 no.5
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    • pp.506-517
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    • 2012
  • Electronic Toll Collection System (ETCS), so called "Hi-Pass" in Korea, has improved traffic flow at toll gate of highways. It is known that the improvement of traffic flow should reduce air pollutants and $CO_2$ from vehicles. In this study, real driving emission of a light duty truck with Portable Emission Measurement System(PEMS) has been measured to evaluate the emission reduction effect due to ETCS. The correlations between driving variables and emissions have been analyzed to verify its effect on traffic flow improvement and emission reduction at toll gate. We considered average vehicle speed, Relative Positive Acceleration (RPA), and the distance of queue as driving variables. Compared to passing Manual Toll Collection System (MTCS) lane without queue, ETCS was able to reduce 38.7% of $NO_x$, 21.6% of soot, and 27.7% of $CO_2$. The results showed that the higher the average vehicle speed, the lower RPA and no queue in ETCS contributed to the emission reductions. Linear equation models with RPA and queue have been established by the multiple linear regression method. The linear models resulted in the higher coefficient of determination than those with only average vehicle speed used for establishing vehicle emission factors.

RFID based the SME algorithm for the multi-lane-supproted ETCS (다차선 서비스를 제공하는 자동요금징수시스템을 위한 RFID 기반 SME 알고리즘)

  • Cha, Jin;Jung, Jong-In;Jang, Sang-Woo;Lee, Sang-Sun
    • The Journal of Korean Institute of Communications and Information Sciences
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    • v.37 no.1C
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    • pp.8-16
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    • 2012
  • In order for the support of the ETCS (Electronic Toll Collection System) model, which have been operated successfully till now, with multi-lane service, the wireless communication system of the multi-lane-supported ETCS based on RF-DSRC (Radio Frequency - Dedicated Short Range Communication) was used. In this paper, the SME algorithm attaching data flow and form into RFID communication technology was newly suggested to overcome technical problems on RF-DSRC communication system. In addition, in order to verify the SME algorithm, experiments based on ETCS and 900Mhz RFID were carried out. From the result of realization experiment of RFID dependent on the velocity and precision experiment of information inside of RFID, we can see that RFID is detected below 70Km/h and the precision of estimation is more than 90%.

Headway Comparison between ATS and ERTMS/ETCS system

  • Kim, Y.K.;Lee, Y.H.;Ryu, C.K.
    • 제어로봇시스템학회:학술대회논문집
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    • pp.1333-1337
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    • 2003
  • The present headway on KNR lines varies from 6 to 10 minutes. Therefore, KNR would like to reduce the headway of all the lines by 4 minutes with the implementation of ERTMS/ETCS on-board system. In Korea, thanks to the operation of the High Speed Line in 2004, the bottleneck phenomenon will occur only in a few sections such as Seoul-Siheung, which will be the common route between KTX and conventional trains. Therefore, we will analyze expected braking distance and running time depending on characteristics of conventional passenger and freight trains and high speed train will be operated within electrified conventional line for comparing the headways of ATS trackside and ETRMS/ETCS on-board system within the Seoul-Siheung section.

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Fabrication and Measurement of a Micro strip-Array Antenna for the Electronic Toll Collection System (ETCS)

  • Yoon, Joong-Han;Lee, Sang-Mok;Lee, Hwa-Choon;Kwak, Kyung-Sup;Chun, Su-Mi;Byun, Woo-Sub;Jung, Myung-Nam;Shin, Dong-Hun
    • Proceedings of the IEEK Conference
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    • pp.723-726
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    • 2002
  • This paper describes the design, fabrication, and measurement of a sequential-rotation microstrip-array antenna for the Electronic Toll Collection System (ETCS). The ETCS is made possible by using roadside equipment with radiation pattern that can accurately pinpoint the designated communication area, without interference from other lanes. The sequential-rotation microstrip-array antenna was applied to the absorber to reduce the side lobe level (SLL). Results showed that the antenna yields a return loss at a center frequency of -20.675 dB, an axial ratio of 1.15 dB, and a gain of 20.26 dBi.

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Study on the Headway by ERTMS/ETCS On-board signal in Seoul-Shihung section (ERTMS/ETCS 차상신호에 따른 서울-시흥 구간 운전 시격 연구)

  • Kim, Yong-Kyu;Byun, Yeun-Sub
    • Proceedings of the KIEE Conference
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    • pp.1297-1299
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    • 2003
  • The Present headway on KNR lines varies from 6 to 10 minutes depending on the each line. Therefore KNR would like to reduce the headway of the all lines by 4 minutes with the implementation of ERTMS/ECTS on-board system. With the operation of HSR lines in 2004 the bottleneck would be expected within a few sections such as Seoul-Siheung which will be the common route between KTX and conventional lines. This study will analyze and compare the optimal headway can be accomplished by the ATS trackside and that of ETRMS/ETCS on-board system within the Seoul-Siheung section.

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Basic Design of CBTC System Based on ERTMS/ETCS (ERTMS/ETCS 기반의 CBTC 시스템 기본설계)

  • Yang, Chan-Seok;Lim, Jae-Shik;Um, Jung-Kyou;Han, Jae-Mun;Bang, Yung;Kim, Hyoung-Hoon
    • Proceedings of the KSR Conference
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    • pp.629-632
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    • 2007
  • Communications Based Train Control(CBTC) is a continuous, automatic train control system utilizing high-resolution, train location determination independent of track circuits; continuous, high capacity, bi-directional train-to-wayside data communications; and trainborne and wayside processors capable of implementing vital functions. In this paper, we present a basic design of CBTC system based on ERTMS/ETCS specifications. The basic design is composed of system requirements analysis, system functional analysis, system architectural design, sub-system requirements analysis, sub-system functional analysis. Each deliverable has been produced according to a development process based on UML/SysML.

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A study of eatablishing ETCS Level 1 to speed up conventional lines (기존선 속도향상을 위한 ETCS Level 1 구축방안 연구)

  • Yoon, Yong-Ki;Jeong, Rag-Gyo;Kim, Chae-Duck
    • Proceedings of the KSR Conference
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    • pp.666-670
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    • 2011
  • ATS(Automatic Train Stop)s are is effected by track environment, signal distance and train braking distance. So onboard signaling systems such as ATP(Automatic Train Protection) are installed on conventional lines by some train operation companies. With the mixed signalling, the onboard signaling system is overlaid on a conventional line with ATS, it is possible to run the line with conventional trains and ATP trains and to use the advantages of ATP(higher speed or more trains on the line). This paper includes guidelines a mixed signalling(ETCS and ATS) system architecture, operation concepts and infill balise installation.

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A Study on the Headway by ERTMS/ETCS On-board Signal in Seoul-Daejeon Section (ERTMS/ETCS 차상 신호에 의한 서울-대전 구간의 운전 시격 연구)

  • 김용규;유창근
    • The Transactions of the Korean Institute of Electrical Engineers B
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    • v.53 no.7
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    • pp.417-423
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    • 2004
  • The headway in Korean national railway normally runs from 6 to 10 minutes. It turns out that the current signal system can not decrease the running headway of the High Speed trains, which are scheduled to set out in April, 2004, between Seoul and Daejeon, since both the existing classical trains and the High Speed ones run on the section. Thus, a new signal system is to be introduced to secure safe and reduced headway. The present paper attempts to analyze the headway between this particular section Seoul-Daejeon of the classical line, where we expect the most severe bottleneck situation to occur. We employed two modes in our analysis : the Ground Signal mode and the On-board Signal mode. which are to be adopted starting from 2006.

Field Test Analysis of Electronic Toll Collection System, Hi-Pass (자동요금징수 시스템(ETCS)의 통신방식별 성능평가 결과 분석)

  • Cho yong sung;Bae Myoung Hwan;Oh won il;Lee Seung Hwan
    • The Journal of The Korea Institute of Intelligent Transport Systems
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    • v.3 no.2
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    • pp.41-53
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    • 2004
  • This study introduces the process of the field test of ETCS that has been performed by six enterprises for selecting the type of ETCS that will be applied to the internal tall roads. The main communication modes of six enterprises are active RF(radio wave)type and IR(optical wave)type. In this study, communication modes and systems, which are being used by each enterprises, have been compared and analyzed. Besides this, the configuration and the basic performances of the system have been checked. After those, the contents of the field performance test classified by the items of the test and the results of the test, finally, have been analyzed. Through analyzing the test, it is found that an enterprise using IR type and two enterprises using RF type satisfied the standards of the test and the others failed to meet the standards. However, the enterprises seem to be becoming stable by a large number of tests and the effort for improving from general point of view. Although the methods of performance evaluation in this field test considered enough patterns that are used in the present highway or Hi-Pass, there might possibly be some problems in the results because Korea Highway Corporation had decided the method and the number of times of the test according to their own standards about the various situations that can happen. Therefore, it will be needed to develop the method of standards for testing the performance which can be correspond with driver's behavior that can actually happen on the highway or the methods of transportation management.

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