• Journal of the Korea Computer Industry Society
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• v.2 no.12
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• pp.1517-1522
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• 2001

In this paper, We propose digital protective relay which monitors the status of distribution line and controls power apparatus with real time operation. Digital protective relay improves the performance of basic functions which are measurement, display and communication. The Int one we consider is that the protective device has the standard method for protecting the distribution systems which are circuit brakers, switch and emergency generators. These are Protected by analog type Protective relay and devices. The security requirements should be activated within a few seconds, and with real time operation. The second one is an efficient method for adapting the one chip micro-processor(PIC16F84) which is enable to digital control system. The proposed methods are implemented with experimental results and have an high fidelity characteristics in local experiment tests.

• Journal of the Institute of Convergence Signal Processing
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• v.22 no.1
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• pp.1-6
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• 2021

Recently, unmanned facilities have been introduced and operated in a way that reduces the cost and development of IT technology. Although unmanned facilities have advantages in terms of efficiency and economy, they have disadvantages such as failure of unmanned facilities and malfunctions, causing damage to facilities caused by intruders, and information leakage. In addition, it is necessary to visit the person in charge at all times to inspect the unmanned facilities, resulting in management costs. In this paper, we designed a system that checks the status of unmanned surveillance facilities in real time to check and automatically recover problems such as malfunctions, and to notify managers of situations by text messages in real time. The system to be designed consists of an integrated network video server (NVR) that receives and determines information on the operation status of the main equipment such as video, sound, and lighting, and a real-time text message using an SMS server.

• Journal of the Korean Society for Railway
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• v.19 no.4
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• pp.445-455
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• 2016

A goal of the Real-time railway safety supervision system is to improve the safety oversight efficiency and to prevent accidents by integrating existing distributed monitoring systems, train, signal, power and facilities. So, the system require better performance regarding real-time processing based on big data. The disk-based database that is used in existing railway control systems has a problem with real-time processing; memory-based databases haves a limitation in terms of big-data processing; and time series databases haves a limitation in terms of real-time processing. So, we need a new database architecture for simultaneous real-time processing based on big data. In this study, we review the existing railway monitoring systems and propose a new database architecture for a real-time railway safety supervision system.

• Proceedings of the Korea Information Processing Society Conference
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• 2007.05a
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• pp.1502-1505
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• 2007

인터넷 및 네트워크 환경의 비약적인 발전으로 기업체의 모든 기반 Application은 사용의 편리함과 시스템 및 데이터관리의 용이성 때문에 웹 기반모델로 변경되어 사용되고 있다. 그러나, 산업현장설비를 실시간 원격제어 감시하는 시스템인 SCADA(Supervisory Control and Data Acquisition)는 웹의 여러 한계성 때문에 아직까지 기존 Client-Server 모델로 대부분 활용되고 있다. 본 논문에서는 이러한 웹의 한계성 중 Client 시스템의 실시간 통신 방식 및 속도, 부하 등을 기존 Client-Server 방식과 동일한 성능을 갖도록 설계 구현하여 적용하고 성능을 평가 하였다.

• Journal of the Korean Society for Railway
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• v.19 no.4
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• pp.526-538
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• 2016

The government of South Korea has made great efforts in the area of railway safety management by means of a railway safety law and an integrated railway safety plan established in 2004 after the Daegu subway fire accident. However, after certain railway incidents, a reactive railway safety management system has been implemented that has led to fatal accidents caused by the collision, derailment, and fire every year. Hence, this study is intended to propose a framework that integrates data from distributed detection devices into a real-time railway safety monitoring and control system for proactive safety management. Furthermore, we will provide a future development direction for safety performance monitoring indicators to determine whether the railway safety monitoring and control system works effectively. The proposed framework is expected to be a cornerstone for the real-time railway safety monitoring and control system to be implemented in the future.

• The Proceedings of the Korean Institute of Illuminating and Electrical Installation Engineers
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• v.9 no.2
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• pp.68-78
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• 1995

Until now, the electrical monitoring system had been used of the Graphic-Mosaic panel, which is located to the cellar at the apartment complex. it was inappropriated to man-power and system-organization at apartment complex. for that reason, in this paper IMS is presented. An Intelligent Monitoring System can provide and explanation of real-time opera- state of an electric power apparatus to its operators in apartment complex. IMS is proposed as a model for integration supervisory system whose primary tasks are to communicate line data with host-computer and slave-controller it is based on a generalized version of use-career and a trouble shoot knowledge base for diagnostic problem solving. to operate it, both of controller and its operator-view is deigned by the real-tune O.S TREND 940.

• Proceedings of the Korean Society of Disaster Information Conference
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• 2017.11a
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• pp.217-218
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• 2017

침수상황감시/현장안내시스템은 핸드폰망(CDMA)등 다양한 통신채널과 이들의 DTMF, SMS, Data 통신 등을 활용하여 수위 등 현장위험 상황을 실시간으로 감시 위험요인 발생 시 비즈니스 룰(Business Rule)을 이용 자동으로 현장안내 및 관리자, 지역주민, 수문 인근 경작지 농민에게 SMS를 이용 즉각 위험 상황을 전달하고, 상황실에 현장 상황 자동표출을 통하여 관계기관 및 국민들이 재난상황에 신속히 대응할 수 있도록 하는 시스템이다. 지방자치단체에서 재난상황 관리에 있어 유형별 표준행동 매뉴얼을 관리 시군구재난관리시스템을 이용 운영하고 있으나, 많은 분야별 자료들이 행정적인 업무지시 및 응답에 치중되고 있는 게 현실이다. 이에 지방자치단체에서 관리중인 배수문, 잠수교, 하상주차장 등 위험지역의 침수상황을 실시간으로 감시하며 공무원, 민원인, 인근주민에게 상황단계에 따른 안내 및 관리에 대한 업무프로세스는 상황에 따른 변화가 있어 단순한 프로그래밍에 의한 전산화하기 힘들다. 본 논문에서는 재난전문가의 전문지식을 적극 활용하여 다양한 상황에 대처할 수 있는 BRMS(Business Rule Management System)를 이용하여 침수상황감시/현장안내시스템의 설계를 제안하고자 한다.

• The Journal of Korean Institute of Communications and Information Sciences
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• v.32 no.4C
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• pp.401-410
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• 2007

In this paper, we propose water quality monitoring system using vision camera and multiple objects tracking method. The proposed system analyzes object individually using vision camera unlike monitoring system using sensor method. The system using vision camera consists of individual object segmentation part and objects tracking part based on interrelation between successive frames. For real-time processing, we make background image using non-parametric estimation and extract objects using background image. If we use non-parametric estimation, objects extraction method can reduce large amount of computation complexity, as well as extract objects more effectively. Multiple objects tracking method predicts next motion using moving direction, velocity and acceleration of individual object then carries out tracking based on the predicted motion. And we apply exception handling algorithms to improve tracking performance. From experiment results under various conditions, it shows that the proposed system can be available for real-time water quality monitoring system since it has very short processing time and correct multiple objects tracking.

• Journal of Radiation Protection and Research
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• v.28 no.3
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• pp.255-261
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• 2003

An environmental radiation monitoring system based on high pressurized ionization chamber has been used for on-line gamma monitoring surrounding the KAERI (Korea Atomic Energy Research Institute), which transmits the dose data measured from ion chamber on the site via radio frequency to a central processing computer and stores the transmitted real-time data. Although communication using radio frequency has several advantages such as effective and economical transmission, storage, and data process, there is one main disadvantage that data loss during transmission often happens because of unexpected communication problems. It is possible to restore the loss data by off-line such as floppy disk but the simultaneous process and display of current data as well as the backup data are very difficult in the present on-line system. In this work, a new electronic circuit board and the operation software applicable to the conventional environmental radiation monitoring system are developed and the automatical synchronization of the ion chamber unit and the central processing computer is carried out every day. This system is automatically able to restore the backup data within 34 hours without additional equipments and also display together the current data as well as the transmitted backup data after checking time flag.

• Proceedings of the IEEK Conference
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• 2003.07c
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• pp.2815-2818
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• 2003

본 논문에서는 윈도우 운영체제 기반에서 CCD 카메라를 통해 얻은 영상 정보를 TCP/IP 네트워크를 통해 전송하고 카메라를 제어하는 원격 감시 시스템을 구성한다 지금까지의 감시 시스템은 영상 정보를 얻어서 저장하고 검색하는 정도의 제한된 기능을 가지고 있었다. 또 거리상의 한계성이 있어서 그 활용도가 높지 않았다. 그러나 디지털 광통신망 시대가 열린 지금, 네트워크를 통한 원격 감시 시스템으로의 발전 요구는 날로 증가하고 있다. 따라서, 이러한 요구에 따라 원거리에서 인터넷을 통해 영상을 실시간으로 전송 받아 즉각적으로 상황을 판단하고 능동적으로 대처할 수 있는 시스템을 구현하는 것이 필요하다.