• 한국산업정보학회논문지
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• 제17권3호
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• pp.59-68
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• 2012

제로 클라이언트 체제는 기업의 문서 중앙화를 위해 제시된 최신의 방법이며, 이를 기업의 현실에 보다 적합하도록 토착화시키는 작업은 필수적이다. 본 연구는 제로 클라이언트 체제의 잘 알려진 보안 및 프라이버시 상의 문제점을 제외한, 사용 상의 문제점을 보완하고자 고안되었다. 즉, 작업자가 작업한 문서를 기업 클라우드 스토리지에 저장하고자 저장 카테고리를 검색하는 과정의 부담과 정확성을 향상시키기 위하여, 작업 문서의 주제어를 자동으로 파악하고, 이를 바탕으로 해당 문서가 저장되어야 하는 카테고리를 자동으로 검색하여 작업자의 확인을 통해 자동 저장되도록 하는, 지능적 아카이빙 방식을 제시한다. 본 연구에서 제시하는 주제어 자동 파악 및 자동 아카이빙을 위한 방법론과 프로토타입 시스템은 기업 환경에 적용이 가능할 정도로 정확성과 확장성을 갖추고 있다.

• 연구논문집
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• 통권27호
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• pp.119-126
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• 1997

In this paper, an information management system is developed to systematically maintain facilities which include AS/RS(Automatic Storage & Retrieval System). Stacker Crane, Tool Transport system and Machining Center in FMS pilot plant. It supports various activities such as periodical inspection, maintenance, management of daily operation time, analysis of existing condition and management of information related to facilities.

• 한국식품과학회지
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• 제20권6호
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• pp.845-849
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• 1988

저장실, 저장상자, 공기분배장치 등을 포함한 실험실 규모의 저장실을 설계, 제작하였다. 과실류를 수용할 수 있는 저장상자(1.7 l)는 투명아크릴을 재질로 일정 공기가 계속해서 순환되도록 하고 저장실은 $0{\sim}30^{\circ}C$ 범위내에서 ${\pm}0.5^{\circ}C$의 정확도로 온도제어가 가능하였다. 저장상자로 유입되는 공기는 공기분배 장치를 통하여 예냉과 공기압의 균일화가 이루어지도록 하였고 Solenoid valve를 사용한 저장상자 선택장치를 제작하였다. 이와 같은 저장시설의 환경제어와 계측을 전담할 수 있는 마이크로프로셰서 시스템을 8 bit 마이크로프로쎄서와 기억장치, 그리고 입출력장치 등의 IC chip을 이용하여 설계 제작하였다. 동 시스템을 활용하기 위하여 저장환경의 제어를 위한 소프트웨어를 개발하고 운영프로그램을 ROM화 할 수 있었다. 제작된 저장 자동제어장치 시스템을 이용 밀감류 저장에 적용하여 저장시설의 운영 및 온도의 자료수집을 성공적으로 수행할 수 있었다.

• 한국산업융합학회 논문집
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• 제21권6호
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• pp.329-335
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• 2018

In an electric vehicle and Energy Storage System(ESS), a large number of batteries are connected in series or parallel to obtain high voltage and current. The battery management system(BMS) is needed because battery has a characteristic that explode in overcharging and overcurrent situations due to the nature of the battery material and the battery life is dramatically reduced when the battery is overdischarged below the specified voltage. In this paper, we proposed a system that can manage a large amount of batteries through the communication of master-slave type with multiple microcontroller. We confirmed the stable operation of the proposed system through the balancing-charging and storage mode experiments.

• Fisheries and Aquatic Sciences
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• 제17권2호
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• pp.189-195
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• 2014

Headspace volatile compounds of cold-stored and freeze-dried Krill Eupausia superba were analyzed to investigate their flavor qualities using a system combining a dynamic headspace isolator, an automatic thermal desorber, and a gas chromatograph-mass-selective detector. Levels of oxidation products of polyunsaturated fatty acids such as aldehydes, alcohols, and ketones, which are known to give seafood a nasty smell because of their low flavor threshold values, increased during cold storage of krill. Notably, levels of 2-methylpropanal, 3-methylbutanal, 2-methylbutanal and 2-butanone increased during its storage. They can be considered index compounds of off-odor according to freshness degradation during storage. By contrast, in freeze-dried krill powder, levels of aldehydes, ketones, and aromatic compounds decreased rapidly. Only alcohols, which did not greatly affect the food flavor, were isolated in large amounts. It was confirmed that levels of oxidized compounds of krill increased during cold storage, but decreased in freeze-dried krill.

• 한국산업융합학회 논문집
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• 제21권5호
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• pp.207-217
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• 2018

Recently, the importance of energy demand management, particularly peak load control, has been increasing due to the policy changes of the Second Energy Basic Plan. Even though the installation of distributed generation systems such as Photovoltaic and energy storage systems (ESS) are encouraged, high initial installation costs make it difficult to expand their supply. In this study, the power consumption of a university building was measured in real time and the measured power consumption data was used to calculate the optimal installation capacity of the Photovoltaic and ESS, respectively. In order to calculate the optimal capacity, it is necessary to analyze the operation methods of the Photovoltaic and ESS while considering the KEPCO electricity billing system, power consumption patterns of the building, installation costs of the Photovoltaic and ESS, estimated savings on electric charges, and life time. In this study, the power consumption of the university building with a daily power consumption of approximately 200kWh and a peak power of approximately 20kW was measured per minute. An economic analysis conducted using these measured data showed that the optimal capacity was approximately 30kW for Photovoltaic and approximately 7kWh for ESS.

• KEPCO Journal on Electric Power and Energy
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• 제1권1호
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• pp.9-13
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• 2015

Energy storage systems (ESS) can be used to provide frequency regulation services in a power system to replace traditional frequency regulation power plants. Battery ESS, in particular, can provide "fast-responding frequency regulation," wherein the facility can respond immediately and accurately to the frequency regulation signal sent by the system operator. This paper presents the development and the trial run results of a frequency regulation control system that uses large-scale ESS for use in a large power system. The control system was developed initially for the 4 MW ESS demonstration facility in Jocheon Jeju Island, and was further developed for use in the 28 MW ESS facility at the Seo-Anseong substation and the 24 MW ESS facility at the Shin-Yongin substation to provide frequency regulation services within mainland Korea. The ESS facility in Seo-Anseong substation responds to a sudden drop in frequency via governor-free control, while the ESS facility in Shin-Yongin responds via automatic generator control (AGC).

• 로봇학회논문지
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• 제6권1호
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• pp.49-57
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• 2011

In many industries, the accurate and quick checking of goods in storage is of great importance. Most today's inventory checking is based on bar code scanning, but the relative position between a bar code and an optical scanner should be maintained in close distance and proper angle for the successful scanning. This requirement makes it difficult to fully automate the inventory information/control systems. The use of RFID technology can be a solution for overcoming this problem. The mobile robot presented in this paper is equipped with an RFID tag scanning system, that automates the otherwise manual or semi-automatic inventory checking process. We designed the robot system in a quite practical approach, and the developed system is close to the commercialization stage. In our experiments, the robot could collect information of goods stacked on shelves autonomously without any failure and maintain corresponding database while it navigated predefined paths between the shelves using vision.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2001년도 하계학술대회 논문집 A
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• pp.38-40
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• 2001

Measuring technology based on the computer and software is used worldwideiy by the aids of remarkably improved digital technology and measuring devices, and the electro- magnetic interference due to high currents and high voltages is being solved by the helps of applied optic instrumentation technology. The automatic acquisition, analysis and storage system of test data is available for utilizing the numerical computation technology. The measuring accuracy and testing efficiency are thus much higher because of the developed technologies. In this paper, the construction of data acquisition system in KERI including measuring devices and its application to the short circuit test are described, and additionally the algorithm of the analyzing program for the automatic process of test data and the results of analyses are described.

• 한국인터넷방송통신학회논문지
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• 제18권5호
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• pp.237-244
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• 2018

중소기업 제조공장의 스마트팩토리 수준이 현재에는 기초 수준으로 창고를 관리하기 위해 재고 입출입에 따른 정확한 재고량을 파악하는 시스템이 부족하다. 또한 근로자 수작업과 경험에 의한 생산방식으로 데이터 손실로 정확한 자재를 관리하기 어려운 상황이다. 이를 해결하기 위해 근로자의 재고 파악을 위한 수작업을 최소화하며 자동화를 향상시키기 위해 재고량 자동 수집을 진행한다. 본 논문에서는 IoT기반의 자율이동모듈을 이용한 스마트 창고관리 시스템으로 자율이동모듈이 창고를 이동하면서 재고 보관함의 데이터를 수집한다. 이는 해당 보관함의 자재들 파악하기 위해 카메라 모듈이 비전처리 방식 통해 재고보관함의 네임텍을 인지한다. 인지한 문자화 처리 결과가 일치할 때 센서에 의해 측정된 데이터가 서버로 전달되고 데이터를 처리하여 데이터베이스에 저장한다. 저장된 데이터는 관리자용 웹 기반 모니터링 환경에서 실시간 재고량을 파악할 수 있다. 이를 통해 수작업을 줄이고 자동화된 재고관리시스템의 효과를 기대한다.