• 한국조명전기설비학회:학술대회논문집
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• 한국조명전기설비학회 2006년도 춘계학술대회 논문집
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• pp.302-308
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• 2006

We introduce the concept of a remote distributed embedded system to integrated fieldbus based control systems in internet/Intranet. As a result fieldbus systems are opened up for remote monitoring, remote maintenance, and remote control applications using state of the art Web-technology. This paper addresses the design of a remote distributed embedded system using Internet and CAN for multi-Induction motor of Building and Industrial field. The fieldbus used the CAN based networked intelligent multi-motor control system using DSP2812 microprocessor. To build such a system, the TCP/IP-CAN Gateway which convert a CAN protocol to TCP/IP protocol and vice verse, was designed. A experimental simulation system consists of a TCP/IP-CAN Gateway in remote place and a command PC ti be connected ti Ethernet.

• 한국조명전기설비학회지:조명전기설비
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• 제6권1호
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• pp.49-56
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• 1992

This paper has analyzed various aspects of electric shock accidents on th base of the published statistical data of the Ministry of labour between 1982 and 1990. The number of electric shock accidents has suddenly been increased in 1990, because of the booming business of the building construction. It was found that many temporal electric wirings and movable electric devices in the field of construction have bee na leading cause of the electric shock accidents. In order to reduce the rate of electric shock accidents the proper authorities will have to establish the safety measures, to educate workers to prevent the accidents and to supervise more carefully.

• 조명전기설비학회논문지
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• 제20권6호
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• pp.26-34
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• 2006

본 논문에서는 고 해상도의 CCD카메라를 이용하여 정밀 소자인 BGA(Ball Grid Array)의 2차원 영상을 얻어 BGA소자의 볼 높이 결함을 검출하기 위한 스테레오 영상 모델링 기법에 관하여 연구하고 결함 검출 알고리즘을 제안한다. 논문에서 BGA 소자의 패키지/볼 영역 검출 알고리즘, FOV 조정(calibration), 정점 정합 알고리즘과 높이 측정 방법을 제안한다. 각각의 BGA소자의 결함에 따른 검출 방법을 제안하고 실험을 통해서 성능을 검증하였다.

• 조명전기설비학회논문지
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• 제25권5호
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• pp.104-109
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• 2011

In this paper, after an acceleration typed ion wind generator which could format strong electric field in air was manufactured and installed, the effects of the electrode configuration and distance of acceleration type ion wind generator with triangle structure on the ion wind generation characteristics were investigated. As a result, the ion wind generator with curvature multipoint electrode could generate higher ion wind velocity and ion wind generation yield than others with multipoint electrode, curvature line electrode, line electrode structure. The ion wind generator with curvature multipoint electrode showed a peak ion wind velocity of 1.33[m/s] at 19.0[kV] and a ion wind generation yield of 0.12[m/Ws] at 15.0[kV].

• 조명전기설비학회논문지
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• 제25권5호
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• pp.15-21
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• 2011

This paper presents an analyzing method of the capacitance of the power transformer for initial voltage distribution and insulation design. When a high incoming surge voltage is accidently occurred in windings of transformer, it does not distribute equally in the windings. This phenomenon makes electric field concentration and the insulating material could be break. Initial voltage distribute mostly depends on capacitances between winding to winding or winding to core in the transformer. If the C network can be structuralized into the equivalent circuit model and be calculated each capacitance element value by circuit analysis and FEM(Finite Element Method) simulation program, the transformer designer could know the place where the structure is to be modified or the insulation to be reinforced. This method quickly provides the data of the voltage distribution in each winding to the designer.

• 한국조명전기설비학회:학술대회논문집
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• 한국조명전기설비학회 2009년도 춘계학술대회 논문집
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• pp.344-347
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• 2009

Surge protective devices (SPD) have a special position because of the expectation that they perform an effective protective function against various kinds of surges. However, there exists a misconception that the SPD satisfying lower measured limiting voltage (MLV) should also protect equipment against temporary overvoltages (TOVs) as well. This paper inspects various types of MOV based SPDs and carry out experiments on the side effects of the low MLV characteristics. The experiment results show that a low MLV could cause a higher TOV-induced SPD failure rate in the field.

• 한국조명전기설비학회:학술대회논문집
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• 한국조명전기설비학회 2009년도 춘계학술대회 논문집
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• pp.263-266
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• 2009

IEC 61850 based substation automation system is operating with Generic Object Oriented Substation Event message when an IED need to send an important signal to other IEDs or receive the signals from another IED such as trip and interlock. So interoperability of substation automation system may be assured throughout the verification of IED GOOSE. This paper shows a testing contents for GOOSE subscription and publish of IEC 61850 based IED and describes how to analysis the result of GOOSE testing. Now domestic IED completed by GOOSE test of this study are working in KEPCO test field.

• 한국안전학회지
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• 제23권6호
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• pp.164-170
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• 2008

This research was verified detection way of intercept vehicles and performance evaluation after system installation using image detector as detection way of ground installation. By image recognition algorithm was on the trace of moving orbit of violation vehicles for detection way of intercept vehicles. When moving orbit is located special site, utilized geometric image calibration and DC-notch filter. These are cognitive system of license plate by making signal. Then, Bright Evidence Detection and Dark Evidence Detection were applied to after mixing. It is applied to way of Backward tracking for detection way of intercept vehicles. After the field evaluation of developed system, it should be analyzed the more high than recognition rate of minimum standards 80%. It should rise in the estimation of the site applicability is highly from now.

• 한국조명전기설비학회:학술대회논문집
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• 한국조명전기설비학회 2009년도 춘계학술대회 논문집
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• pp.63-66
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• 2009

Lighting currents are one of major influences on the dynamic performance of ground electrodes. High lighting current intensity changes in the dynamic grounding performance due to ionization of the soil and very fast fronted pulses. The previous analysis has often been based on quasi-static approximation that is not applicable to very fast fronted pulses. To extend the analysis to fast fronted pulses in this paper, the full-wave analysis method based in the rigorous electromagnetic-field theory approach is used and the effects of the ionization of the soil me disregarded. Based on the simulation results, the empirical formulas applicable for slow and very fast fronted lightning current pulses me reviewed; therefore the validity of the theoretical approach is verified through comparison between the calculated and measured results.

• 조명전기설비학회논문지
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• 제30권1호
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• pp.14-20
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• 2016

The accurate analysis of the outside sky conditions is necessary to increase the efficiency of blind PV system. To conduct the accurate analysis, this paper suggested a method to analyze the sky condition using a specific image processing technique. While a fisheye lens has a wide field-of-views, it causes a large distortion to the sky images. Therefore, this paper calculated the exchange ratio of sky images to consider a lens distortion. As results of the study, there was a difference of 7% to cloud area ratio F4 and F11. Also, it had a different result depending on the position of the cloud.