• Proceedings of the KIEE Conference
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• summer
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• pp.1454-1456
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• 2004

전기선로전환기는 분기기에 전환력을 공급하기 위한 장치로 전기선로전환기의 선택은 분기기에 연결되는 간류 구조, 침목, 밀착 쇄정기, 밀착 검지기, 연결간 및 벨 크랭크 등에 따른 제약 사항과 함께 검토된다. 본 논문에서는 현재 우리나라에서 사용 중인 전기선로전환기에 대한 특성을 분석한 후, 기존선 속도 향상 및 안전사고 예방을 위한 보안 설비의 추가적인 설치 필요성 분석 및 속도 향상을 위한 요구 사양을 분석하였다.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.10 no.11
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• pp.3115-3120
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• 2009

An electric point-machine which changes over a turnout so that it enables a train to be operated in the routine that a train is to proceed has been installed and used in most of the railways such as not only urban railways but also main-line railways. Most of the maintenance works in this electric point-machine is that the maintenance workers manually measure motor power, control power and display power in the site with the use of portable counters. Especially in case of NS or NS-AM electric point machine, the maintenance cycle is so frequent that during the operation casualty accidents caused by carelessness occurs as well as more staff is required for this measurement. In this paper we propose a system for monitoring the state of electric point machine installed in the site to improve maintenance efficiency and it is expected that this monitoring system confirms any measured values on electric point machines in real-time and improves maintenance efficiency.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.11 no.11
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• pp.4509-4514
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• 2010

In this thesis, the effect of switch maintenance improvement is confirmed after testing and operating the switch monitoring system that were researched and developed originally in order to improve method of electric switch maintenance. However, as in an automatic interlocking station where a ground crew was not placed, repair and inspection could not be carried out until the maintenance person comes in case of switch problems or maintenance. In order to improve this issue, control module was installed in a monitoring system which can communicate through a data radio to a remote computer. Thus, the monitoring device can receive control information which a remote computer commands during the operation of switches. Afterward, it shows information on the real-time status of swith, in particular, anomaly situation through user interface after the switch is operated. By improving performance of the monitoring system in this way which can be managed and controled at a remote place, the prompt countermeasure system in case of disruption will be built and as a result, efficiency and convenience of maintenance improvement will be expected to increase.

• Proceedings of the KIEE Conference
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• 2005.07b
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• pp.1565-1567
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• 2005

본 논문은 듀얼듀플렉스구조로 설계된 한국형고속철도 열차제어시스템의 전자연동장치 선로전환기제어모듈에 대하여 안전성활동 체계에 따라 위험원을 도출하고 분석하여 선로전환기제어모듈에 대한 위험측고장률을 예측하였다. 시스템으로 인해 발생할 수 있는 리스크를 분석하여 리스크를 완화하기 위한 안전대책의 수준인 안전무결성레벨에서 제시하는 정량적인 기준을 만족하기 위한 위험측고장률예측을 선로전환기 제어모듈을 대상으로 연구하였다.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.10 no.12
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• pp.3632-3637
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• 2009

In this paper, we describe the performance results of the field installation test which is required to practicalize the single-phase MJ81 Switch Point Machine. This product has passed the certified test through performance improvement of driving parts in order to use 3 phase MJ81 Switch Point Machine, which is localized by taking over technology from Alstom and Cogifer when constructing Seoul-Busan rapid-transit railway, without change of the electrical equipment at track-side in domestic existing lines which single-phase 220V is used. KRRI and Samsung SDS have localized the single-phase MJ81 Switch Point Machine to improve the speed and safety of the conventional lines through the existing railway technology development project. For practicalization of this, we should, however, verify the performance through not only field installation test in real lines but also interface test with the interlocking. In this paper we verify the practicality of the domestic single-phase MJ81 Switch Point Machine through analysis on the performance result of the field installation test as well as the research contents for this test. Thereby, in Feb 2009 we have received an order from the Korea Rail Network Authority and are currently installing the single-phase MJ81 Switch Point Machine.

• Proceedings of the KIEE Conference
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• 2009.07a
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• pp.1181_1182
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• 2009

본 논문에서는 단상 MJ81 전기선로전환기 국산화를 위한 구동부의 성능 개선 및 이의 시험에 대한 내용을 기술하고 있다. 한국철도기술연구원 및 삼성 SDS에서는 기존철도기술개발사업을 통해 기존선의 속도 및 안전성 향상을 위해 단상 모터 규격 및 신뢰성 등의 검토를 실시하였으며 국산화 개발의 타당성 검토 및 기능과 성능 규격을 제정하여 이에 따른 시험 절차를 체계화하였다. 또한 이와 병행하여 MJ81형 전기선로전환기에 사용 가능한 단상 220V 모터를 삼성SDS와 공동으로 개발 완료한 후, 종합시험장치에 개발품을 장착하여 총 20만회에 달하는 내구성 시험을 수행하여 성공적으로 성능을 입증하였다.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2019.05a
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• pp.400-402
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• 2019

The electric point machine, which is used for the control of the turnout used to change the track of the train, is very important in the railway system. Various wired and wireless real-time monitoring systems are used to check the status of the point machine, but there is a possibility of malfunction due to sensor or network error. In this paper, a redundant monitoring system was designed that incorporates the point machine monitoring system and the CCTV camera control system to double check the operation of the point machine. In the point machine monitoring system, the operating state of the railway converter is monitored, alarmed and transmitted over the network. The CCTV camera control system, which received this information, was required to record the status of the turnout and the point machine in question and send it to the administrator. The manager of the railway line can check the conversion status of the railway through the monitoring screen for the railway line switcher first, and then confirm the switching status directly through the CCTV camera image, thereby improving the reliability of the point machine operation. It will also enable the safe and efficient operation of personnel for management. It is expected to contribute to preventing a derailment caused by a malfunction of the point machine.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.17 no.9
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• pp.351-358
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• 2016

An Electrical Point Machine (NS:New-type Switch), which is equipped and operated at railways in Korea, has been used since the 1960s after being imported from Japan. On the other hand, although the mechanical configuration has improved the position motor control circuit, the electrical connection has not been improved, so NS may have a problem, such as the interlocking system of automatic train operation. In addition, NS is the most vulnerable part in the railway system and a huge train accident may occur due to minor defects. The existing NS wiring set of the circuit controller should be checked only if fixed. Therefore, an excessive inspection time only by a Railroad Signal expert is required. In this paper, the improvement of electrical connection in a NS wiring set, such as the position motor control circuit, was developed and the prototype was installed at Seoul Metro in the distance to go section. The results can be used to help make appropriate adjustments. The improvement of the NS wiring set enhance the maintenance efficiency, passenger service and the stability of the signal system as well as reducing the maintenance cost.

• Proceedings of the KIEE Conference
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• 2015.07a
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• pp.1591-1592
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• 2015

분기기는 선로가 분기되거나 또는 교차하는 지점에 설치되어 열차의 이동 방향을 안전하게 변경하는 역할을 한다. 그러나, 운영 노선 및 동작 환경에 따라 비정상적인 힘이 분기기에 발생할 경우, 정확한 진단 및 검측을 실시할 수 없는 단점이 있다. 본 논문은 국내에서 사용중인 MJ81 전기선로전환기의 전환기능과 쇄정기능의 특성 분석을 통해 기존에 사용된 분기기 전환력 측정의 문제점을 제시한 후, 이를 해결하기 위한 센서 활용 분기기 전환력 측정 방법을 제시한다.

• Journal of the Korean Society for Railway
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• v.18 no.4
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• pp.335-343
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• 2015

The role of the turnouts installed on the points of railway branches and intersections is to safely switch the directions of trains. In case of abnormal forces applied to the turnouts due to extreme operating conditions, it is difficult in the current system to conduct accurate diagnosis and measuring. Moreover, the existing measurement devices for turnout switching power are mostly based on foreign technologies, which provide only limited information on the switching power; this information is insufficient for effective monitoring and maintenance. In this paper, through an analysis of the characteristics of the switching and locking function, the problems in turnout power measurements of current electrical point machines in Korea are examined. And based on the results, a new sensor-based method for measuring switching power is proposed.