• Proceedings of the KSR Conference
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• 2003.10c
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• pp.157-163
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• 2003

This paper proposed a new type of vehicle detector using a MR sensor. and addressed detector's apparatuses and detecting algorithms. Proposed detector has been tested on a local highway between Mishiryong and Sokcho in Korea. Through extensive field tests, the outputs of the detector in response to various kinds of passing vehicles have been collected and analyzed. It is verified from the analyses that the outputs of the detector take on very different aspects with each vehicle, so that information on not only traffic count but vehicle types could be extracted from the outputs. And, with the proposed detector, traffic volumes on the two lanes in the tested region were measured and compared when both congested and clear traffic situations.

• Journal of the Korea Safety Management & Science
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• v.4 no.3
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• pp.167-175
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• 2002

There are two methodologies to increase transport capacity of railway. One is to invest railroad equipment or vehicles, and the other is to improve operation efficiency through optimization. All of these is intended to increase transport capacity by improving the line capacity. So far, we treat the line capacity as the criteria for evaluating investment alternatives or for restricting train frequencies, and this criteria is calculated statical and experimental numerical formula. But, line capacity has special attribute that changes dynamically according to operational conditions, so there is a need of new line capacity estimation system. The Purpose of this paper is to present a new estimation system of line capacity based on the probability simulation and its applications.

• Proceedings of the KSR Conference
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• 2002.10a
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• pp.238-243
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• 2002

The maintenance CALS system for car of urban transit is a part of standardization and development of urban transit system, and We have been performed the establishment of maintenance CALS system from 2001 to 2005. These 2D and 3D configuration management system are utilized in a variety of CALS system for user's convenience and safety in maintenance. In this paper, the 2D and 3D configuration system will be discussed for necessity and possibility. This system include RAMS(reliability, availability, maintainability and safety) of the vehicles shall be enhanced in the future.

• Proceedings of the KSR Conference
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• 2006.11b
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• pp.736-741
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• 2006

In this study, a ubiquitous sensor for condition monitoring of insulators and lightning arresters installed in power distribution lines and electric traction vehicles is presented. The sensor consists of two parts; a leakage current measurement and a lightning surge detection. Measured data are transmitted to a supervisory computer through ZigBee protocol based on IEEE 802.15.4. To detect leakage current, a window type Mn-ZCT is used and a low-noise amplifier with a gain of 60dB is designed, and this can measure leakage current in ranges of $100{\mu}A{\sim}5mA$. A sample-hold(S/H) and a Rogowski coil are injected to analyze the magnitude of surge current in ranges from 500A to 10kA with $8/20{\mu}s$-waveform.

• Proceedings of the KSR Conference
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• 2006.11b
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• pp.1165-1171
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• 2006

The purpose of this study is to implement an emergency response procedure based on the scenario of the field of vehicles and provide more rapid and exact response program needed when train accidents happen. Therefore, we have made worst case combinations of accidents and prioritized the combinations. A number of accidents have been analyzed according to the type of, the people affected by, and the location of accident. Both horizontal and vertical response system have also been defined. Furthermore, Activity-Action Diagram has been applied to the emergency response scenario and action procedure of each group has been clearly systematized. Consequently, this paper provides a specific response system useful when train accidents happen.

• Proceedings of the KSR Conference
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• 2006.11b
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• pp.202-206
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• 2006

Although the urban rail vehicle is exposed to the fire disaster, most country, except only a few advanced country, is insufficient to take a measure against the fire accident. Safety regulation modification, fire safety standard of the materials. and each material's fire resistance of the rail vehicle have been upgraded until the Daegu fire disaster in Korea. For that reason, In this study, current techniques of fire safety evaluation are analyzed and fire safety degrees of rail vehicles are compared with the change of interiors which is met to the fire safety standard of urban rail vehicle.

• Proceedings of the KSR Conference
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• 2006.11b
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• pp.964-967
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• 2006

Korea Railroad Research Institute (the following 'KRRI') built AGT test line in Gyeong San-city, Kyongsang-bukdo province, Korea on August, 2004. This test line is exclusively used for the test of the driverless rubber-tired AGT system, and applied with research result of AGT System Development Project like vehicles, power supply, control and signaling, track and infrastructure system. The test line is available for the test of rubber tired AGT system's performance, function, safety. In this paper, we described the operation system of test line for the test of performance, safety, reliability, and also system operation in emergency. Finally we present the operation result of test line.

• The Transactions of The Korean Institute of Electrical Engineers
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• v.61 no.9
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• pp.1368-1373
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• 2012

In this paper, we propose an efficient driving pattern which consumes less energy for driving from one station to next. Three driving patterns for four sections in the No. 5 subway line of Seoul Metropolitan Rapid Transit Corp. are compared for the energy consumption, the maximum speed, and the powering time. It turns out that the powering time and the maximum speed should be decreased as much as possible in order to achieve the efficient driving.

• Proceedings of the KIEE Conference
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• summer
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• pp.1400-1402
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• 2004

The safety of staff, customers and of general Public in general viewed as one of the most important requirements in the urban transit. The maintenance computerization system for car of urban transit is a part of standardization and development of urban transit system. and We have been performed the establishment of maintenance computerization system from 2001 to 2005. The RAMS (reliability. availability. maintainability and safety) estimation for maintenance computerization system are utilized in a variety of computerization system for user's convenience and safety in maintenance. Ever since its inception though. the urban transit has searched for ways to improve reliability. availability. maintainability and safety of the railway subsystem. Provision of a reliable maintenance system include RAMS of the vehicles plays a very important role in achieving a safe system.

• Satellite Communications and Space Industry
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• v.14 no.1 s.29
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• pp.102-109
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• 2007

본 논문은 고속열차와 같은 고속 이동체에서 위성무선연동 전송기술을 이용하여 지상무선망과 동일한 수준의 인터넷 서비스를 제공하기 위한 이동형 위성 인터넷 접속기술에 관한 것이다. 이러한 서비스 제공을 위해서는 터널이나 역사(Railway Station)와 같은 N-LOS 환경에 대한 대처기술이 필요하며, LOS 환경에서도 철로상에 설치되어 있는 Electronic Power Post나 Power Bridge 등으로 인한 주기적이고 짧은 시간동안의 신호열화 현상이나 고속 이동에 따른 도플러 현상에 대한 극복기술이 필요하다. 이러한 기술들이 집약된 본 시스템을 소개한다.