• The Transactions of the Korean Institute of Electrical Engineers P
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• v.62 no.2
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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.

• Proceedings of the KOR-KST Conference
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• 2007.11a
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• pp.861-869
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• 2007

• Proceedings of the KSR Conference
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• 2004.06a
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• pp.1124-1131
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• 2004

Great impetus has come from the renewed emphasis on improving public transport in many countries. In Korea, built over 12 years at a cost of ${\$}12$ billion and modeled on the TGV of France, the Korea Train Express will open for regular traffic on April, 2004. The schematic design of terminal building for Kwang-Myeong station was chosen by the international competition in 1997. Mooyoung Architects and Engineers joined with AREP, French Architect awarded.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2009.10a
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• pp.843-846
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• 2009

경부고속전철의 급전선에 의한 전력유도 대책을 위하여 건설 당시 정보통신부 고시에 의하여 시행되었다. 통신선에 장애를 유발할 수 있는 전자유도 대책을 위해서는 국가 기술기준에 의한 유도전압 한계치가 정해져 있고 현장 대책 상 이 제한치를 초과할 때에 필요한 것이므로 상기 정부 고시의 기술 근거에 의해 유도전압을 계산하여 조치하고 있다. 전기철도시스템에서 지역 구간상의 전력 공급을 위한 일정 거리마다 급전소가 시설되어 있어서 이로부터 전철에 전력이 공급되고 있다. 전철의 유도현상에 의한 유도전압 분포 분석을 위한 전국 구간 유도측정을 수행하여 급전구간에서의 유도전압 특성을 파악하였다. 구간 중심점상에서 낮아지는 전압에 대해 급전소 근접 구간에 이르렀을 때의 전압 상승 특성을 분석하였다. 급전소로부터 귀로되는 전류의 양이 집합됨으로 유도전압이 높아지고 거리가 멀어질수록 전압은 떨어진다. 유도대책을 전압 분석에 있어서와 차폐시설물의 연계 활용 시 이러한 전압의 영향성을 고려할 필요가 있다.

• KSCE Journal of Civil and Environmental Engineering Research
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• v.28 no.4D
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• pp.539-543
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• 2008

The Directional sign system in Korean high speed railway stations has a lot of problems. For an example, It lacks of consistency in the shape or allocation. Also, the signs do not match with the actual directions sometimes. Last but not least, the view is blocked by the other signs such as advertisement or other barriers. We suggested the methods to standardize the sign systems that include visibility, accuracy, consistency, and simplicity. First, we categorized signs into directional signs, locational signs, and infomational signs. Then, we examined the actual high speed railway stations in Korea to learn the real situation. Finally, we suggested the methods to standardize the sign systems considering the factors that are visibility, accuracy, consistency, and simplicity.

• Proceedings of the KSR Conference
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• 2010.06a
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• pp.2319-2344
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• 2010

Accumulated deficits resulting from managing the Korean Railroad and debts from the construction of the KTX (Korea Train Express which is a high-speed rail system) have left the Korean Railroad faced with great troubles. Since it changed into a public corporation Korail on January 1st, 2005, the Korea Railroad has been making unceasing efforts to overcome the troubles and improve its management. However, even these efforts haven't worked in the face of the improved conditions of other transportation methods such as better networks of land roads and air ways. The Korea Railroad had its revenue from its railway transportation limited, and has tried to expand its business to non-transportational areas. In some metropolitan cities, the Korea Railroad made investments in real estate by constructing station buildings based on private money. Yet, in small and medium size cities, the Korea Railroad has little particular strategic projects for business development. Recently certain small and medium size regional cities began to plan on business developments for the ex-railway land, and some small towns have developed real estate on the ex-railway land. Nevertheless, there have been no systematic case studies to classify these real estate developments.

• Journal of the Korean Institute of Illuminating and Electrical Installation Engineers
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• v.27 no.12
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• pp.87-92
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• 2013

In high-speed train, the EMI is generated by pantograph detachment and switching device of motor-block. Especially, the conductive noise flows through rail as return feeder influences unintended results to sub-station, transformer, etc. These phenomena were investigated by PSIM circuit analysis tool and each part of railway system is modeled by circuit elements and switching devices. Consequently, the distorted wave in return feeder current occurs by the high speed switching frequency, and the overvoltage is applied by the pantograph detachment. Also the distortion of return current is high in starting point and it decreases from the proximity of a starting point ro the end of terminal.

• The Transactions of The Korean Institute of Electrical Engineers
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• v.62 no.9
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• pp.1324-1328
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• 2013

The reason of train location detection is generally the train interval control between the railway stations and the train path control in the railway station yard in order to avoid train collision. It is very important to know the train location for shortening the train headway, and improving the efficiency of railway maintenance as well as the safe operation of trains. Therefore, the accurate detection of train location is the prerequisite technology in railway signalling system. The track circuit and the wheel sensor of rolling stock have been used to detect the train location widely in urban railway as well as high speed train. The track circuit is continuously monitored by electrical equipment to detect the absence of the train and the tachometer and encoder is used for the wheel sensor to measure the train speed. But speed sensor failures are frequent due to the extremely harsh operating conditions encountered in rail vehicle. The CBTC(Communication based Train Control) system has been used in urban railway system recently. But the installation of CBTC system is very high and the modification of design is difficult. This paper deals with the feasibility of new train location detection method using magnetic sensors.

• Proceedings of the Korean Society for Noise and Vibration Engineering Conference
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• 2005.05a
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• pp.861-864
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• 2005

Brake noise has been one of the most difficult concerns in the automotive industry. Although substantial research has been conducted to predict and eliminate brake noise, there is yet no method to completely suppress brake noise. Furthermore, little effort has been made to improve noise and vibration characteristics of the railway brake system. The amount of sound energy radiated from the railway brake system is much larger than that from the automobile, and it causes discomfort of passengers in the station. In this paper, noise and vibration caused by the braking force of the KTX vehicle have been measured and analysed. Results show that noise level increases abruptly right before a train comes to a complete stop. Furthermore, typical characteristics of the disk brake squeal have been observed.

• Proceedings of the KSR Conference
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• 2010.06a
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• pp.273-281
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• 2010

To install turnout on the main line of high speed railway running 300km/h, measures of rail destressing of existing line, speed-up plan, shortening the installation time and other important technical measures should be considered to reduce the inconvenience of passenger. In particular, for the newly constructing Ohsong and Kimcheon-Gumi station in KyongBu high speed line, it must be difficult to install divided turnout part because it should be done within short night block out hours (6 hours per day) and KTX trains are safely serviced just in time, which is not only the first time in the domestic and but also very rare practical experience in the world. This thesis is covered with experienced work conditions, required equipments and various safety measures, etc.