• 대한토목학회논문집
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• 제41권4호
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• pp.441-447
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• 2021

건설현장에서는 수많은 중장비와 작업자가 다양한 작업을 동시다발적으로 수행하기 때문에 복잡하고 위험한 상황이 자주 발생한다. 복잡한 현장에서 중장비가 단독으로 작업할 경우 운전자의 시야제한, 판단오류 등으로 인해 안전사고가 발생할 수 있으며, 이에 따라 중장비는 신호수와의 상호작용을 통해 주변 상황에 대한 정보를 수집하면서 작업을 수행해야 한다. 중장비를 자동으로 모니터링하고 위험상황을 탐지하기 위해 많은 컴퓨터비전 기술들이 개발되었지만, 기존의 방법들은 중장비 단독작업 인식에 필요한 중장비와 신호수 간 상호작용을 고려하지 않았다는 한계가 있다. 이러한 한계를 보완하기 위해 본 연구는 중장비-신호수 간의 상호작용을 고려한 컴퓨터비전 기반 중장비의 단독작업 자동 인식 모델을 제안함을 목표로 한다. 개발된 모델을 검증하기 위해 실제 건설현장으로부터 영상 데이터를 수집하여 실험을 수행하였다. 그 결과, 학습된 모델은 중장비와 사람을 83.4 %의 정확도로 인식하였고, 일반 작업자와 신호수를 84.2 %의 정확도로 분류하였으며, 중장비-신호수 간 상호작용 또한 95.1 %의 높은 정확도로 분석하였다. 본 연구결과는 건설현장에서 위험한 상황을 초래할 수 있는 중장비의 단독작업을 사전에 탐지하여 안전사고를 예방할 수 있다.

• 대한기계학회논문집A
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• 제41권7호
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• pp.683-689
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• 2017

고유가, 환경규제 등의 국제무역환경 변화에 따라 수출주력상품인 유압 브레이커의 고부가가치화를 위하여 지능형 전자제어유압시스템 분야인 ICT 융합기술을 활용하여 암반특성을 예측하고 최적모드(다단형)로 구동하는 지능형 파쇄기술 및 에너지 효율을 극대화할 수 있는 유압 브레이커 개발에 관한 연구를 수행하였다. 본 연구에서는 암반의 강도에 따라 최적의 타격력을 제공하기 위해 근접센서를 이용해 암반 타격 시 피스톤의 하강 깊이를 측정하고 이를 통해 암반의 특성을 판별하여 타격력을 결정하는 피스톤 스트로크의 길이를 솔레노이드 밸브를 이용해 제어하였다. 다단 타격시스템을 위해 컨트롤러와 디스플레이/조작장치를 개발하였고, 무선통신을 이용하여 상호 정보교환이 가능하도록 하였다. 최종적으로 암반 강도에 따라 3단으로 타격할 수 있는 제어시스템을 개발하였고, 실차실험을 통해 이를 검증하였다.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2002년도 하계학술대회 논문집 B
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• pp.1376-1378
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• 2002

Compare and examined Full Auto Line of PV module Manufacture Equipment and PV module Manufacture Equipment in the Korea. Full Auto Line has been constructed with Cell Selection. Tabbing & Stringing. Module Setting, Lamination, Curing and Module Testing, and Module Manufacture Line in the Korea has been constructed with Tabbing & Stringing. Module Setting, Lamination and Module Testing. Laminator's temperature Control is the most important Variable in Manufacture of PV module. Temperature Transformation of Center part of PV module is most high at Lamination, and Edge part is most low.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2011년도 제42회 하계학술대회
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• pp.1820-1821
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• 2011

The equipment qualification test was accomplished before application to power generating stations because troubles in applying to real system could be prevented trough the test. That is, if a system was judged to be suitable in the equipment qualification test, the system was expected to be operated stable to the designed life.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2008년도 추계학술대회 논문집 전기설비전문위원
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• pp.305-307
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• 2008

Inundation of substation and ground power equipment breaks out every summer season in low-lying downtown and low-tying shore by heavy rain, typhoon and tidal wave. In case inundation excluding the exchanging cost of equipment, it occurs a great economic and social loss owing to recovery time and events of electric shock occur by inundation electrical equipment (Pad-mounted Transformer and Switch). So we research the flooding prevention countermeasures of electrical facility and Transformer Vault on Foreign. We conform the site facility and related regulation for flooding prevention on Foreign.

• 대한전기학회:학술대회논문집
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• 대한전기학회 1987년도 전기.전자공학 학술대회 논문집(II)
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• pp.954-957
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• 1987

This paper proposes a kind of function-concentrated signaling service equipment structure, in which various kind of signaling service are efficiently made for call processing control. Based upon the typical switching system models, a philosophical study on the capacity, features of structure in world systems, and interfaces with peripheral equipments has been performed in order to provide the rationale on the merits or efficiency of the proposed digital signaling service equipment.

• Nuclear Engineering and Technology
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• 제43권5호
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• pp.469-476
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• 2011

The inner surfaces of bundled inconel tubes from steam generators in South Korean nuclear power plants are contaminated with cobalt and abrasive blasting equipment has been developed to efficiently remove the cobalt. The principal parameters related to the efficient removal using this equipment are the type of abrasive, the distance from the nozzle, and the blasting time. Preliminary tests were performed using oxidized inconel samples which enabled the simulation of cobalt removal from the radioactive inconel samples. The oxygen in the oxidized samples and the cobalt in the radioactive inconel were removed more effectively using the blasting distance, blasting time, and a silicon carbide abrasive. Using the developed abrasive blasting equipment, the optimum decontamination conditions for radioactive inconel samples were blasting for more than 6 minutes using silicon carbides under 5 atmospheric pressures.

• 대한전기학회:학술대회논문집
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• 대한전기학회 1996년도 하계학술대회 논문집 B
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• pp.902-904
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• 1996

In this paper, we proposed the reasonable design standard and countermeasures of Demand Factor for large office buildings, that was made by the statistical way considering actual conditions, such as investicated electric equipment capacity, electric power consumption, etc. So as to save electric equipment investment, the decrease of power loss, the improvement of facilities utilization and the decrease of electric rates, we can be contributed by the application of the design standard. The result of saving effect is showed to confirm the practical use of the proposed Demand Factor, and also, it is believed that this proposed Demand Factor will be useful in electric equipment operation and planning.

• 대한안전경영과학회지
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• 제10권4호
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• pp.135-143
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• 2008

Recently as the testing of fire detector used the testing device for fire detector, there are something the matter in the perception function loss of fire detector, structure and form of the testing device for fire detector. The problem at oxidation of emitting smoke ashes hazardous article part and so on that checking person absorbs be. In this paper the problem or the conventional the examination equipment of fire detectors is analysed and researched. To solve these problems after the theoretical study and design and paint drawing of equipment the prototype of composite examination equipment of fire detectors was made. After compared with the conventional, part that improve of composite examination equipment of fire detectors are verified through the examination. In the future it will be useful the operation state and correct operation time of the fire detectors are measured after the research about the quality of the material and transparency of bellows cover is done.

• 해양환경안전학회:학술대회논문집
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• 해양환경안전학회 2018년도 공동국제학술발표회
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• pp.179-179
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• 2018