• Title, Summary, Keyword: ETCS

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Synoptic Structures and Precipitation Impact of Extratropical Cyclones Influencing on East Asia Megacities: Seoul, Beijing, Tokyo (동아시아 대도시에 영향을 미치는 온대저기압의 특성 및 강수 영향 비교: 서울, 베이징, 도쿄)

  • Kim, Donghyun;Lee, Jaeyeon;Kang, Joonsuk M.;Son, Seok-Woo
    • Atmosphere
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    • v.31 no.1
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    • pp.45-60
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    • 2021
  • The synoptic structures and precipitation impact of extratropical cyclones (ETCs) influencing on the three adjacent megacities in East Asia, i.e., Beijing (Beijing ETCs), Seoul (Seoul ETCs) and Tokyo (Tokyo ETCs), are analyzed using ERA-interim reanalysis data from 1979 to 2018. Individual ETC tracks are identified with the automated tracking algorithm applied to 850-hPa relative vorticity field. Among four seasons, ETCs are the most frequent in spring. In this season, Beijing ETCs are mainly generated at the leeside of Altai-Sayan Mountains and primarily develop through interaction between the upper-level trough and lower-level cyclonic circulation. For Seoul ETCs, the leesides of Altai-Sayan Mountains (Seoul-N ETCs) and Tibetan Plateau (Seoul-S ETCs) are main genesis regions and the features of ETCs are different according to the genesis regions. While Seoul-N ETCs mainly develope by the same mechanism of Beijing ETCs, strong diabatic heating due to vapor transport is responsible for the genesis of Seoul-S ETCs. Tokyo ETCs are originated from the leesides of Tibetan Plateau and Kuroshio-Oyashio Extension regions, and strong diabatic heating as well as interaction between upper and lower levels determines the genesis of these ETCs. The precipitation impact resulting from ETCs become strong in the order of Beijing ETCs, Seoul-N ETCs, Seoul-S ETCs, and Tokyo ETCs and accounts for up to 40%, 27%, 52%, and 70% of regional precipitation, respectively.

A Study on the Design of Onboard Speed Profile of the ETCS-L2 System (ETCS-L2 차상 속도 프로파일 설계에 대한 연구)

  • Lee, Jong-Seong;Jeon, Jae-Hun;Jung, Gyung-Jang;Kang, Deok-Won
    • Journal of the Korean Society for Railway
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    • v.17 no.5
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    • pp.349-354
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    • 2014
  • Other foreign countries already apply ETCS LEVEL 2 in signaling systems. It provides added functions to control a train using wireless communication compared with ETCS LEVEL 1. Nowadays, the ETCS LEVEL 2 system is being applied on revenue services more and more frequently. Therefore, it is necessary to develop ETCS LEVEL 2 to apply in this country. The advanced technology of the ETCS LEVEL 2 system provides continuous control for train protection, and ATP function, by comparing discontinuous controls on ETCS LEVEL 1. ETCS LEVEL 2 is a better system model for improving passenger safety. This paper describes the design of an onboard speed profile for the ETCS LEVEL 2 system and it forecasts the future of ETCS.

A Study on an ETCS Demand Forecasting Model of Toll Roads in Changwon City (유료도로 ETCS 이용수요 예측모형에 관한 연구 (창원시를 중심으로))

  • Kim, Kyung-Whan;Ha, Man-Bok;Jeon, Yeon-Hoo;Lee, Ik-Su
    • International Journal of Highway Engineering
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    • v.9 no.1
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    • pp.17-27
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    • 2007
  • Since early 1990s, several developed countries have applied the Electronic Toll Collection System (ETCS) to toll roads in order to solve traffic congestion and delay problems at toll plazas. For the successful operation of the ETCS, it is important to correctly forecast the ETCS using rate. In this study, it was conceived to develop a sophisticated demand forecasting model of the ETCS for toll roads in Changwon City The Binary Logit and neural network models were tested for the model considering 11 explaining variables. The best results in prediction accuracy and goodness-of-fit were obtained on the neural network model. However, because of the difficulty in predicting the 11 variables and its fitness in wide range, the Binary Logit model which considers three policy variables only is recommended as the model to forecast the ETCS using rate.

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Requirements and Functional Analysis of the ERTMS/ETCS Trackside System using HARMONY Process (HARMONY 프로세스를 이용한 ERTMS/ETCS 지상 시스템의 요구 및 기능 분석)

  • Um, Jung-Kyou;Yang, Chan-Seok;Kim, Hyoung-Hoon;Cho, Yong-Gi;Kim, Chi-Jo
    • Proceedings of the KSR Conference
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    • pp.1382-1387
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    • 2007
  • ERTMS/ETCS is a signalling and control system designed for interoperability between railway networks. In this paper, SysML was used for modeling of the ERTMS/ETCS trackside system. We used use case diagrams and sequence diagrams for requirements analysis and functional analysis. By doing this, we could show that main functions of the ERTMS/ETCS trackside can be described and verified based on scenarios.

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Analysis of the RF Link Design for ETCS and Study on the Communication Zone by the Antenna Beam Pattern (ETCS용 RF 링크 설계와 안테나 빔 패턴에 의한 통신 영역 연구)

  • Yim Choon-Sik;Ha Jae-Kwon;Ahn Dong-Hyun
    • The Journal of The Korea Institute of Intelligent Transport Systems
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    • v.3 no.1
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    • pp.21-30
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    • 2004
  • This paper describes the design of RF link between RSE and OBU of ETCS and the analysis of the antenna beam pattern to get a proper communication area in the cross direction and traveling direction of lanes. This stage should be performed prior to determination of system requirements of ITS service based on active DSRC. This study is important and fundamental technical analysis to design and implement base station of ETCS.

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The ETCS Convergence Terminal for Eco-driving and Vehicle Diagnostics (에코-드라이빙과 차량 진단 겸용 ETCS 융합 단말기)

  • Kim, Sam-Taek
    • The Journal of the Institute of Internet, Broadcasting and Communication
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    • v.12 no.2
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    • pp.29-34
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    • 2012
  • Nowadays, the problem of ETCS terminal in becoming popular gradually is that there is no services except for ETC. Therefore, we need new system that provide many type of additional services at one-terminal. In this paper, we study the additory function of ETCS terminal to afford many type of the vehicle administration beside collection and provider of traffic information. We descrived the method of Eco-driving function beside to save fuel signing instant and mean fuel-efficiency, measurement of section fuel-efficiency on OLED and then brings out the best driving habit in people and to prevent dangerous at the wheel as diagnosing engine oil, cooling water, fan belt, the point of changing consumables, diagnoses to an overheated engine, charges on generator through ECU. The multi-services terminal consist of the vehicle diagnosis module base on OBD-II and ETCS terminal.

Electronic Credit Card Processing Methods for Contactless Toll Collection (비접촉식 도로통행료 징수를 위한 전자 신용카드 처리 방법)

  • Park, Jin-Sung;Kwon, Byeong-Heon
    • Journal of Advanced Navigation Technology
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    • v.11 no.3
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    • pp.337-342
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    • 2007
  • This paper proposes Electronic Credit Card(EMV) processing procedures for a credit payment method which can be applied to Korean ETCS(Electrical Toll Collection System). In Korea, Korea Highway Corporation services contactless ETCS's called by Hi-Pass and Touch-Pass system at present. These systems operate on a pre-paid payment method similar to electronic money. On the other side, a credit payment method based on credit card has an advantage which does not require pre-paid. The introduction of credit payment method to ETCS is in preparation. In this paper, we propose EMV processing methods based on a credit payment method which can be applied on ETCS.

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Design and Fabrication of Base Station Antenna for ETCS based on DSRC (DSRC 기반의 ETCS 기지국 안테나 설계 및 제작)

  • Ko Jin-Hyun;Kim Nam-Ki;Ha Jae-Kwon
    • The Journal of The Korea Institute of Intelligent Transport Systems
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    • v.3 no.1
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    • pp.75-83
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    • 2004
  • This paper describes the design, fabrication, and measurement of a low side lobe antenna for RSE base station of the ETCS which is one of the ITS services. The antenna is installed on the gantry of road side and provides the wireless communication lint between vehicles and RSE. The required characteristics of ETCS base station antenna are low sidelobe and specific beam pattern by the road and install environment and installed place of OBU. To minimize the affects of multipath signal by reflection, Circular polarization is required. To get low sidelobe of antenna, array configuration and weighting factor by Taylor distribution in radiator elements are applied. The measured results of fabricated antenna are as follows; return loss of 130MHz by -10dB, an axial ratio of 2.6dB, and a gain of 17dBi. It is found that the measured beam patterns are similar to design results.

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