• 한국전산구조공학회논문집
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• 제22권1호
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• pp.73-79
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• 2009

본 논문에서는 승객 보호용으로 지하철 역사에 설치된 PSD(승강장 스크린 도어)의 상부 헤더박스 내에 부착되어 개폐용 유리문을 지지하는 알루미늄 구동(레일)부재에 대한 구조해석과 최적설계를 수행하였다. 구동부재의 볼트 체결부에 대한 엄밀한 구조해석을 위하여 물리적 현상과 일치하도록 상세 유한요소 모델링하여 해석의 정확도를 높였다. 또한 유리문이 구동부재에 걸려 있으면서 개폐될 때 발생하는 하중의 이동상태를 고려한 구조해석 결과, 설계 목표치인 내구 수명 20년이 만족되었다. 구동부재 단면의 단면 길이를 설계변수로 하고 설계제약조건(응력의 최소화, 중량의 감소)에 만족할 수 있도록 반응표면법을 적용한 최적화를 수행하여 15%의 감량 결과를 도출하였다.

• 한국철도학회:학술대회논문집
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• 한국철도학회 2010년도 춘계학술대회 논문집
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• pp.157-160
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• 2010

Management of indoor air quality of underground subway station is an important issue since the limited natural ventilation, limited sunshine incoming, and highly moistured atmosphere. The improvement in IAQ of platform is expected because most stations were installed with platform screen door currently, however, the poor air quality in tunnel might be affecting subway cabin indoor. In this study, we developed the air quality assessment model based on computational fluid dynamics. The geometry of air ventilation unit, seat, LCD monitors, and passengers were modeled using commercial software (Design Modeler) and fluid pattern and pollutants trajectories were analyzed by using CFX. We predicted the thermal comfort by predicted mean vote (PMV), distribution of CO2 and PM10 concentration. It is expected that this model can be used for the performance test of air cleaners which are under development.

• 한국안전학회지
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• 제32권5호
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• pp.122-128
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• 2017

Korean government announced long-term railway safety investment plan for the safety improvement by 2020. But no research have been done about differential analysis on railroad safety investment and safety improvement. In this study, recent 10 year data on safety investments and accident data are analysed for the differential analysis. Three main safety investments are analysed on regard to accident rate and accident fatalities. Three safety measures include level crossing accident, platform fatalities, and track trespass fatalities. About 90% of railway accident fatalities are caused by these three kind of accidents. Differential analysis shows about 4 to 6 years delay after railroad safety investment and safety improvement. This result can be utilized for the decision making on safety measures and safety target. Which required long term approach.

• 한국터널지하공간학회 논문집
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• 제20권2호
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• pp.527-539
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• 2018

다수의 승객들이 이용하는 지하철은 안전과 공간의 쾌적한 환경관리가 필수적이며, 2003년 이후 기준 강화로 승강장 내에 스크린도어(PSD)를 반드시 설치해야 한다. 선행연구에 따르면 지하철 화재 시에 화재연기의 배연을 위해 배연설비의 설비용량 최적설계가 필요하다. 따라서 본 연구에서는 선행연구의 실험 결과를 바탕으로 3차원 수치해석기법을 이용하여 PSD가 설치된 승강장 내에서 화재발생 시 배연시스템 별로 CO가스와 Smoke의 유동을 분석하였다. 본 연구의 결과 비상시 상부 배연설비만 가동한 경우에는 CO 가스와 Smoke 농도는 653.8 ppm과 $768.4mg/m^3$로 피난 시 승객들의 위험이 큰 것으로 분석되었으며, 모든 배연설비를 가동하고 화재측 PSD만을 개방한 경우 CO 가스와 Smoke 농도 36.0 ppm 및 $26.2mg/m^3$를 보이며 화재연기의 전파범위가 줄어드는 것으로 분석되었다. 모든 배연설비를 가동하고 화재측 PSD를 미개방한 경우에는 화재연기 유입이 발생하지 않아서 대피환경에 있어 가장 효과적인 배연모드로 분석되었다.

• 한국철도학회:학술대회논문집
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• 한국철도학회 2007년도 춘계학술대회 논문집
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• pp.1678-1684
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• 2007

Platform Screen Door(PSD) has been installed in train manual operation section(ATS/ATC) by SeoulMetro since 2005. PSDs are now operating at 17 stations in SeoulMetro lines. As a result, it increases the safety of passenger, makes a comfortable platform and saves the energy of air conditioning. For PSD operation, train shall stop within 600mm of the train stop reference point. In train manual operation section, the detection system of train position is required to notify the train driver of train position and to ensure the condition that train stops the correct position for PSD operation. To detect the train stop position, the optical sensor shall be installed at platform. However, in case of SeoulMetro lines, the detection criterions of the train correct position stop are different because of using various types of trains which have different size and shape of front cars. In this paper, to solve this problem, the precise detection algorithm of the train stop at the correct position is used, and Laser distance measure sensor is introduced to notify the distance form the reference point of the train correct stop to train driver. This system has been applying to Seoul Metro line total.

• 한국전자통신학회논문지
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• 제8권3호
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• pp.471-477
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• 2013

본 논문에서는 하이브리드 궤도회로를 이용한 정위치 정차시스템에 대한 가능성에 대해 연구하였다. 하이브리드 궤도회로는 UHF대역의 RFID시스템을 이용하고 실시간 운영체제를 기반으로 철도차상시스템과의 통신이 가능한 차세대 철도신호시스템의 한 부분이다. 본 논문에서 사용된 UHF대역 RFID 시스템은 원형편파의 태그와 리더 안테나가 사용되고 일체형 리더기는 송신출력 25dBm에서 우수한 인식회수를 얻었다. 현재 수동운행중인 지하철 차량에 이 시스템을 적용하여 정위치 정차를 하게 되면 기존 수동운전에서 기관사의 실수로 역을 지나거나 PSD(Platform Screen Door)와 열차출입문이 Mismatch 되는 현상을 방지할 수 있다.

• 한국철도학회:학술대회논문집
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• 한국철도학회 2007년도 춘계학술대회 논문집
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• pp.1408-1415
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• 2007

To operate Platform Screen Door (PSD) automatically, the operational data of PSD and the train must be interfaced properly. PSD and train are operated together by the signaling system in Automatic Train Operation (ATO) signaling system zone where interfaces are provided between PSD and train. However, the additional PSD interface system with train is required in train operating zone without the interface between PSD and train. For the PSD interface, the wireless communication system or the train status (train correct stop status / train door status) detection system has been used. Seoul Metro line No.2. has the PSD wireless communication system using 447MHz band RF. For the safety of PSD operation, it is required to prevent RF interference in the subway environment where many frequencies exist. In this paper, the PSD wireless communication system is developed using 2.4GHz band RF to prevent the interference of the wireless communication and increase the traffic of the PSD interface. Furthermore, the improved system can store, manage and display the PSD and train operational data using Human Machine Interface (HMI) in the train's driver cab.

• 한국철도학회논문집
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• 제10권5호
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• pp.511-519
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• 2007

대구지하철 방화사건 이후 방재시설이 많이 개선되었지만 아직 인명안전에 대한 확실한 대안을 제시하지 못한 상태이다. 본 논문은 전동차 화재 시 인명안전의 보장을 입증하는 방안에 대하여 정량적으로 평가한 논문으로 화재 열차가 터널 내에 정차할 경우를 가정하여 시나리오를 구성하고, 최악의 시나리오에 대한 가상 화재 및 피난시뮬레이션 기법을 활용하여 대피안전성을 평가하였다. 평가결과 현행 지하철 터널구조하에서의 인명안전을 확보하기 위해 승강장(스크린 도어 설치)에서는 터널상부에서 승강장 천정부를 연결하는 제연환기구(덕트 포함)를 설치할 경우, ASET시간을 연장할 수 있기 때문에 대피안전성 확보가 가능하다. 또한 터널중앙 환기구에서는 배기통과 완전히 분리된 별도의 특별 피난계단을 연결하여 설치하여야만 터널 중앙환기구를 통하여 대피하는 승객의 대피안전성의 확보가 가능한 것으로 입증 제시한바, 실물화재실험의 수행없이 가상화재시뮬레이션에 의하여 대피안전성을 정량적으로 입증하였다.

• 전기학회논문지P
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• 제62권2호
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• pp.57-64
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• 2013

Many accidents are being occurred due to many missteps, etc. at the railway platform. Recently in Korea, efforts to prevent casualties fundamentally are being made by installing and operating the PSD(Platform Screen Door) with underground station building as its center to prevent these casualties of passengers. Although this PSD can solve the problem of public casualties at platform fundamentally, it is impossible to install it at whole station buildings since its installation cost is high, and in case of the ground station building of general railway whose operation speed is higher, installation of PSD is impossible due to the characteristics of railway system. This paper proposes the novel safety equipment using Laser radar sensors for the prevention against casualties of passengers at station buildings where the PSDs are not installed like this. The safety equipment using Laser radar sensors is the safety equipment making an approaching train stopped if the falling object is a person by detecting the obstacle at platform through, and it has the merit possible to apply it to station buildings not only in the underground section but also in the ground section since it may detect accurately under ambient environmental elements such as the snow, rain and yellow dust, etc. also. We developed the prototype of the safety equipment to reduce public casualties at platform by using Laser radar sensors and carried out its performance test, and the result is presented in this paper.

• 한국신뢰성학회지:신뢰성응용연구
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• 제16권4호
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• pp.272-279
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• 2016

Purpose: In order to fulfill the RAMS (Reliability Availability Maintainability and Safety) requirements in Korean railway systems, specific target metrics should be measured and met the requirements when ordering a new system. This paper presents a procedure to predict and demonstrate the availability, maintainability and safety of subway elevators, escalators and PSD (platform screen doors) systems. Methods: The system manufacturer predicts availability and maintainability with lab and field tested data. After installation, availability and maintainability are demonstrated based on the actual operational data. The data was collected from the FRACAS (Failure Report and Corrective Action System). Results: Methods and process of assessing and analyzing the availability, maintainability and safety are presented for elevating services and PSD systems. The data obtained through the actual operation of the equipment is analyzed and maintained to predict the RAMS based on the component and system level failure data acquired. Conclusion: This study presented an application using IEC 62278 and operational data which can be used in the design and development stage to achieve the RAMS target value of the subway elevators, escalators and PSD systems.