• 한국방송∙미디어공학회:학술대회논문집
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• 한국방송공학회 2010년도 하계학술대회
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• pp.42-45
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• 2010

This paper proposes an intelligent video surveillance system for human object tracking. The proposed system integrates the object extraction, human object recognition, face detection, and camera control. First, the object in the video signals is extracted using the background subtraction. Then, the object region is examined whether it is human or not. For this recognition, the region-based shape descriptor, angular radial transform (ART) in MPEG-7, is used to learn and train the shapes of human bodies. When it is decided that the object is human or something to be investigated, the face region is detected. Finally, the face or object region is tracked in the video, and the pan/tilt/zoom (PTZ) controllable camera tracks the moving object with the motion information of the object. This paper performs the simulation with the real CCTV cameras and their communication protocol. According to the experiments, the proposed system is able to track the moving object(human) automatically not only in the image domain but also in the real 3-D space. The proposed system reduces the human supervisors and improves the surveillance efficiency with the computer vision techniques.

• 제어로봇시스템학회:학술대회논문집
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• 제어로봇시스템학회 2001년도 ICCAS
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• pp.114.2-114
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• 2001

In steel works, Locomotives and torpedo ladle cars are used to convey the smelted iron that comes out Blast Furnace to the steel-making mill. Above conveying vehicles are operated in all steel works area. And to trace their positions, after partitioned their areas, Automatic Vehicle Identification(RF-ID method) is installed on the railroad and identifies vehicle numbers. But AVI facilities have many problem that means that are too expensive, cost too much maintenance fee and inefficient management. This paper is to revamp those inefficient operations and state the status of operations of train positioning system, get to know what the problem is. And also when we use GPS to monitor and trace the vehicle position ...

• 한국철도학회:학술대회논문집
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• 한국철도학회 2004년도 추계학술대회 논문집
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• pp.1461-1466
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• 2004

Recently Domestic EMU's on board signal systems are gradually changed form Cab signal(Fix Block) to Distance-to-go. Interfaces with on board signal system, TCMS Redundancy structure is mainly required. This paper suggest Manaul/Automatic Driving based on TCMS-ATC interface and design of backup system which is operated by Stan-by Computer when one of it's Local Interface Unit(LIU) is out of oder. For the purpose of Precision Train Stop, Distance-to-go signal system require accuracy speed. Free-axle structure is required for this system This paper suggest Free-axle braking system that lack of brake-force is compensated by the distributed brake-force using TCMS. And one of braking system has out of order, compensation of brake-force for Free-axle system. Then we prove our design to Complete Car Test

• 한국철도학회:학술대회논문집
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• 한국철도학회 2003년도 추계학술대회 논문집(III)
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• pp.265-271
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• 2003

System engineering is one of the most important research topics in railway system for developing new railway system or improving existed system. The system engineering methods have been applied to innovate railway system. The system engineering activities, which are requirement analysis, functional analysis, system synthesis and analysis, sometimes requires longtime and tiresome works to fix some ideas level into some concrete forms. The system engineering using objected oriented method relieves the hard works of system engineering and clarifies the system engineering objects from its ambiguities. In this paper, we presented requirement model, analysis model and design model using objected oriented approach and showed the consistency of the system engineering work with an example of Automatic Train Control System.

• 한국철도학회논문집
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• 제5권2호
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• pp.104-111
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• 2002

The purpose of interlocking system was to prevent the route for a train being set up and its protecting signal cleared if there was already another, conflicting route set up and the protecting signal for that route cleared. This paper proposed Interlocking Inspection System(IIS) consisting of interlocking simulator and field simulator to operate interlocking test of computer based Electronic Interlocking System(EIS) in this paper. Interlocking simulator consists of Design Edit System(DES), Logical Database Management Tool(LDMT) and real-time confirming system, field simulator is a equipment to simulate a control object of EIS and constitutes configuration operated in 19 inch standard rack. As a result of test to prove capacity of this IIS, the efficiency was shown as excellent. Therefore by using inspection system, we obtain every advantages. It has the functions for test data generation and automatic test execution based on personal computer. Time and cost for test work can be reduced more efficiently by using this developed inspection system

• 전자공학회논문지SC
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• 제48권4호
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• pp.47-53
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• 2011

전동차 출입문은 포켓 슬라이딩 도어, 아웃 슬라이딩 도어, 플러그 도어로 구분된다. 현재 국내 전동차의 표준규격으로 제시되어 있는 포켓 슬라이딩 도어는 철도차량이 고속화됨에 따라 소음 및 외풍의 차단이 어려운 단점이 있으며, 아웃 슬라이딩 도어 역시 소음 및 외풍차단이 어려운 시스템이다. 반면에 플러그 도어는 최근 철도차량이 고급화됨에 따라 고속철도에 적용되던 출입문을 전동차에 적용하면서 쓰이게 된 도어시스템으로 승차감 개선에 소음이 중요한 위치를 차지함에 따라 소음에 강한 플러그 도어 시스템이 주목받고 있다. 이러한 이유로 차세대전동차에 적용할 목적으로 전기식 플러그 도어를 개발하여 시험 진행 중에 있다. 플러그 도어를 구성하는 하부 부품으로는 출입문 제어 장치 (DCU : Door Control Unit), 모터, 스크루 기어, 볼 너트, 레일, 리미트 스위치, 각종 전기 장치, 비상 수동 개폐장치, 코디네이션 바 등이 있는데 이중 DCU는 전동차 출입문을 개폐하기 위한 제어장치로 량당 8개인 전동차 출입문이 동시에 열리고 닫히기 위해서는 각 출입문간의 인터페이스가 필요하며, 승객의 승하차와 직접적으로 관련되어 있기 때문에 신뢰성 및 안전성 확보가 매우 중요한 시스템이다. DCU의 기능으로는 자동 문 여닫음 제어, 출입문 제어 및 장애 감지, 출입문 상태 제어, 저전압/고전압 감시 등이 있으며, 본 논문에서는 전기식 플러그 도어에 적용하기 위해 개발된 DCU의 기능, 개발요구사양, 시스템 구성 및 시험결과에 대해 논하고자 한다.

• 한국정보통신학회:학술대회논문집
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• 한국해양정보통신학회 2009년도 추계학술대회
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• pp.773-776
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• 2009

최근의 차량 산업은 차량 내 전자장비들을 하나로 묶을 수 있는 네트워크들이 발달되고, 이에 따라 각각의 네트워크간의 통신이 중요시 되고 있다. 현재 차량에 사용되고 있는 네트워크로는 CAN, LIN, MOST, FlexRay 등이 사용되고 있다. 여러 가지 네트워크들이 생겨나면서 네트워크를 이용한 여러 가지 응용들도 생겨나게 되었고, 이로 인해 운전자들도 좀 더 편리한 환경에서 차량을 운전하고자 하는 욕구가 많아지고 있다. 차량내의 다른 네트워크 환경을 하나의 통합된 환경으로 만들어주기 위한 게이트웨이 연구가 활발히 이루어진다면, 보다 많은 응용들이 개발될 것으로 예상된다. 본 논문에서는 주로 차량의 Body Train 쪽 제어에 사용되는 CAN bus 네트워크와 인포테인먼트 시스템을 제공해주는 MOST 네트워크간의 게이트웨이를 이용한다. 통신을 통해 CAN Node중의 하나인 차량속도를 MOST Navigation 으로 전송하여 차량이 터널에 진입하여 GPS 정보를 얻어올 수 없을 때도 차량의 현재 속도정보를 Gateway를 통해 Navigation으로 실시간으로 전송하는 기술을 이용하는 차량 자동 안전제어 시뮬레이션 시스템 설계하고 구현하고자 한다.

• 한국철도학회:학술대회논문집
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• 한국철도학회 2011년도 정기총회 및 추계학술대회 논문집
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• pp.3180-3186
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• 2011

A segmented scissors type switch has been developed for the urban transit maglev demonstration line to be commercialized near Incheon International Airport in 2013. Based on the design of the previous segmented 3-way switch, the scissors switch is composed of four segmented 2-way switches up/down and left/right and a turn table in the mid point. The main function of the scissors switch is to change the running direction of the train at end terminals. The developed scissors switch is planned to be installed in front of the 102 station, which has a side platform, of the demonstration line. The total length of the switch is 65m and the distance between the up and down track centerlines is 6m. The 2-way switches and turn table are made of steel box type beams, and have their own driving unit, locking unit, control unit, levitation and propulsion rails, and so on. Installed in the factory, a 100,000-cycle continuous operation test was carried out after manual and automatic test operations. The applicapability of the developed switch was verified through the measurements of the linearity of the track after repetitive operations, the mechanical operation noise, the load of the main driving motor, the safety of the control panel, the natural frequency of the girder, the deformation of the girder, and so on.

• Journal of Electrical Engineering and Technology
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• 제1권4호
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• pp.513-519
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• 2006

As a very important part in development of the protocol, verifications for developed protocol specification are complementary techniques that are used to increase the level of confidence in the system functions by their specifications. Using the informal method for specifying the protocol, some ambiguity may be contained therein. This indwelling ambiguity in control systems can cause the occurrence of accidents, especially in the case of safety-critical systems. To clear the vagueness contained in the designed protocol, we use the LTS (Labeled Transition System) model to design the protocol for railway signaling. And then, we verify the safety and the liveness properties formally through the model checking method. The modal ${\mu}$-calculus, which is an expressive method of temporal logic, has been applied to the model checking method. We verify the safety and liveness properties of Korean standard protocol for railway signaling systems. To perform automatic verification of the safety and liveness properties of the designed protocol, a communication verification tool is implemented. The developed tools are implemented by C++ language under Windows XP. It is expected to increase the safety and reliability of communication protocol for signaling systems by using the developed communication verification tool.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2001년도 추계학술대회 논문집 전기기기 및 에너지변환시스템부문
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• pp.271-274
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• 2001

The purpose of interlocking system was to prevent the route for a train being set up and its protecting signal cleared if there was already another, conflicting route set up and the protecting signal for that route cleared. Recently, the computer based control systems instead of conventional relays circuitry are widely used to industrial systems, therefore, interlocking system are rapidly changing from relay interlocking system to Electronic Interlocking System(EIS) that control requirements of interlocking at junctions using electronic circuits. In this paper, by examine checking technique of EIS, we will to acquire interlocking inspection algorithm and method for EIS and to develope inspection system for EIS. By using inspection system we obtain every advantage. It has the functions for test data generation and automatic test execution, and it can operate on personal computer. Time and cost for test work can be reduced to more of those now required by using this developed inspection system.