• 한국철도학회:학술대회논문집
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• 한국철도학회 2008년도 춘계학술대회 논문집
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• pp.559-571
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• 2008

Platform Screen Door(PSD) has been installed and operated at seoul subway line $1\sim4$ in the manual train operation mode(ATS/ATC) by SeoulMetro since 2005. SeoulMetro uses the wireless (RF) communication system and the train door detection system for the link between the train and PSD doors opening/closing motion in the manual train operation mode. For the convenience and safety of passengers, the train doors and the PSD doors opening/closing shall be synchronized as much as possible. In ATO(Automatic Train Operation) mode which provides the interface between train control system and PSD system, ATO signaling system makes the train doors and PSD doors open/close command signals systematically, so PSD doors can be opened/closed almost simultaneously with the train doors. But, in the manual train control(ATS/ATC) mode, PSD system needs to detect the train doors open/close operation and make PSD open/close command signals to actuate PSD doors. These PSD open/close commanding process cause time delay of PSD doors opening/closing motion in response to the train doors opening/closing motion. Sometimes the response delay time can be over 1 second, which is not proper to operate PSD, and need to be reduced This paper presents the reduction method of the PSD response delay time to improve the convenience and safety of passengers.

• 한국철도학회:학술대회논문집
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• 한국철도학회 2008년도 춘계학술대회 논문집
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• pp.1060-1066
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• 2008

Bi-modal tram is a new conceptual transit mean for public transportation integrating thoroughfare and railroad vehicle's characteristics together. This paper describes about a software design which will be applied to an automatic driving system, which is called NCS (Navigation Control System), considering such multiplicity of mechanical characteristic. The NCS adopts propulsion, braking, and direction control functions for a tram and utilizes various sensors to fully take control over such functions. In this paper, we defined and analyzed the capabilities of the NCS. Those capabilities are designed with a UML 2.0 based object-oriented modeling technique. Moreover, to ensure the complete operation of such capabilities, a communication protocol (which is capable of controlling sensors, propulsion, brakes, and traveling directions) is designed here. Throughout the paper, firstly, all the NCS related functions are discussed in accordance with the equipments they are belonged to; secondly the UML modeling application techniques for the defined functions and protocols for the communications between equipments are introduced; and lastly a validation process for the design specifications is going to be discussed.

• 한국철도학회:학술대회논문집
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• 한국철도학회 2008년도 춘계학술대회 논문집
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• pp.653-658
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• 2008

Service areas in the urban transit need to construct the intelligent integrated surveillance system, because they are the public places that many people get together at one time. In past, analogue, closed-circuit televisions and analogue video recorders are used to construct the surveillance system. Now, a lot parts of the analogue systems that depend on the images have been changed to the complicated system, which consists of sensors and images and also, to be digitalized. In past, the surveillance system was used as an inspection devices to examine the spots after happening some events. But, with a high level of the computer and communication technologies, it is possible that the digitalized data leads the intelligence systems to prevent some accidents by using the various analysis techniques. And the data could be used to decide surveillance policies and provide some information on the safety and management policies as well as surveillance policies. In this paper, we define the intelligent surveillance system and suggest the major functions of the system. Also, we suggest the fundamental functions that every part should get and describe the way to develop the system.

• 한국철도학회:학술대회논문집
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• 한국철도학회 2004년도 추계학술대회 논문집
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• pp.1309-1315
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• 2004

전기철도차량에서 발생하는 고조파는 인접통신선에의 유도장애를 일으키고 철도신호장애의 원인이 될 뿐만 아니라 전원계통에 유입되는 경우에는 전력용 콘덴서의 과열을 유발시키고 주요장치의 계전기를 오동작 시킬 우려가 있다. 따라서 고속철도차량에서의 각 운전 모드별 고조파 실측을 하였으며 한국전력의 규제치를 상회함에 따라 최적대안으로 부하 측에 고조파 저감설비를 기존선 각 변전소(구로, 경산, 밀양)에 설치하였다. 이와 관련하여 본 논문에서는 고조파 저감 설비를 설치하기 전과 설치 후의 고조파 발생현황을 실제 측정하여 도표화하고 얼마만큼의 저감 효과가 있는지를 비교 검토하였다.

• Journal of electromagnetic engineering and science
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• 제10권4호
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• pp.276-281
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• 2010

In this paper, an electromagnetic induction on a telecommunication line by the distribution line of a power provision system or a feeder line of an electrified railway system has been verified through experiments. The basic cause of induction occurrence by these practical power provision systems is the returning current through the earth. This principle has been confirmed by the experiments documented in this paper which implemented these mechanisms to incur an induction. Experimental methods were used to produce the returning current through the earth. The experiment to find a relationship between inducing strength and the distance between the two phase lines in a power provision line has also been included to confirm that, when the distance is enlarged, the induction effect increases as the cross-nullification effect of magnetic fluxes decreases. An experiment for the existence of a shielding effect by another conduction length material has been addedas a protection measure against the induction.

• 한국철도학회:학술대회논문집
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• 한국철도학회 2006년도 추계학술대회 논문집
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• pp.941-946
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• 2006

It followed in system development and SMRT(Seoul Metropolitan Rapid Transit Co)System reached to an automatic train operation(ATO) and driverless operation(DLM) from the manual operation due to the train driver. The train like the general bus or the car vehicle was not serial riding in a car and the Parallel concept which the numerous passenger rides in a car simultaneously occur frequently the charge of the train driver unmanned bitterly from existing manual handling was a possibility of doing, train open door control(ODM) which bites also ATO, it handles it minimized. Like this ATO/DLM, the control system which bites being a Wayside to Train communication for immediacy, it is a system of the Vital concept the immediacy of the citizen Data evil the radio information transmission and the train of the interface which is accurate from unmanned operation and, will decipher, will accomplish it will guarantee. It respects the passenger accident prevention and an air question environment improvement from subway platform and phul leys the screen door of Platform(PSD) with the fire tube frost it refers and part it treats and to sleep it does, ODM which bites is accuracy and immediacy of altitude and when seeing from the viewpoint which demands the trust of altitude, ODM system the trust of car incest interface in the equipment construction which is safe and the comparative analysis back of the system analysis against the control which bites and case study and other subway system it leads from the research which it sees and signal - train in base grudge to sleep it contributes it does.

• 전기학회논문지
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• 제64권12호
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• pp.1818-1823
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• 2015

In this paper, we analyzed the optimal configuration of protection wire that have been installed in the electric railway power supply system. Protection wires are to suppress the ground potential rise when the short circuit fault between contact wire-rail(C-F), and protect the electronics equipments(signalling and communication) that are facility the wayside. The role of protection wires must be feed back quickly the fault current to the substation when a short circuit fault occurs. In this paper, we proposed that only one line to install the protection wire. Comparing how to newly proposed and existing system, most of the performance is similar. The reason is that most of the current flowing in the protection wire near the location where the fault occurred. There is no problem even if in one line for human safe and the low impedance of the return circuit in dimension to ensure the safety of the facility during the fault. To ensure safety during an fault occurs, it is sufficient even by one line. But, In the protection wire of facilities planning it is necessary to design taking into account the potential utility.

• 한국철도학회:학술대회논문집
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• 한국철도학회 2008년도 추계학술대회 논문집
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• pp.1264-1269
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• 2008

We designed a track circuit of Tag in-tag out type that can be used for light rails and monorails. This method is called RFID-Tag and it literally uses RFID-Tag and replaces a fixed track circuit and implements a moving block. The distance between RFID-Tags is set to the length of a train and thus a train is always in contact with one of the tags. A train runs in RFID-Tag in -RFID-Tag out type at all times and the distance between trains can be precisely controlled through the application of a moving block combined with the basic principle of a fixed block, which enables the continuous speed control and enhances the satisfaction of passengers. When constructing a track circuit using RFID-Tag the Tag in-tag out brings us the cost reduction and is more economical than the existing fixed track circuit in that sense and easy for installation and maintenance. The wireless communication between onboard and wayside makes the continuous control possible and can improve the control capacity of ATP/ATO by the implementation of a moving block on top of a fixed one.

• 사물인터넷융복합논문지
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• 제8권6호
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• pp.55-63
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• 2022

최근 중국에서 중대형 도시철도의 급속한 발전으로 고속철도의 총 운행거리와 총 EMU(Electric Multiple Units) 수가 증가하고 있다. 고속 EMU의 시스템 복잡성은 지속적으로 증가하고 있으며, 이는 장비의 안전성과 유지보수의 효율성에 대한 더 높은 요구사항을 제시한다. 현재 중국의 고속 EMU의 유지보수 모드는 여전히 계획적인 유지보수 및 고장보수에 기반한 사후 유지보수 방식을 채택하고 있어 유지보수가 미흡하거나 과도하게 이루어지며, 장비 고장 처리의 효율성을 떨어뜨리고 유지보수 비용을 증가시킨다. PHM(진단 및 예측관리)의 지능형 운영 및 유지관리 기술을 기반으로 합니다. 본 논문은 고속 EMU의 서로 다른 시나리오의 다중 소스 이기종 데이터를 통합하여 "차량 시스템-통신 시스템-지상 시스템"의 통합 PHM 플랫폼을 구축하고, 장비 고장 메커니즘을 인공지능 알고리즘과 결합하여 고속 EMU의 트랙션 모터에 대한 고장 예측 모델을 구축한다. 고속 EMU의 안전하고 효율적인 작동을 보장하기 위해 고장 예측 및 정확한 유지보수를 사전에 수행해야 한다.

• 한국ITS학회 논문지
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• 제10권1호
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• pp.112-123
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• 2011

본 연구에서는 지속가능한 통행패턴을 제고하기 위해 압축도시개발기법에 정보통신요소를 접목한 새로운 개념의 사이버 압축도시(Cyber-Compact City) 개발방안을 제시하였다. 먼저 정보통신기술과 도시개발 전략을 통합하는 사이버 압축도시의 개념을 기존 문헌 등을 통해 도출하고, 이를 교통의 지속가능성 제고 측면에서 정립하였다. 또한 정보통신기술의 활용과 압축도시개발의 통합적 접근을 시도한 해외사례를 살펴보고, 국내에서 추진될 수 있는 전략적 접근방법을세가지 측면에서 제시하였다. 첫번째는 대중교통 네트워크와 정보통신 네트워크의 융합전략으로 국토 및 도시공간구조의 연결체계를 대중교통과 정보통신 네트워크의 중심으로 재편하는 것이며 철도의 여유공간에 정보통신 인프라를 건설하는 것이다. 두번째는 대중교통 결절점과 정보통신 결절점의 융합전략으로 주요 철도역을 중심으로 지역거점 및 도시거점의 정보통신센터를 구축하는 것이다. 마지막으로 대중교통 영향권과 정보통신 영향권을 통합하여 연계체계 및 정보통신기능이 강화된 대중교통지향형 입체복합개발을 제시하였다.