• Journal of information and communication convergence engineering
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• 제18권1호
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• pp.61-68
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• 2020

In the era of the fourth industrial revolution, many production plants are gradually evolving into smart factories that apply information and communication technology to manufacturing, distribution, production, and quality management. The conversion from conventional factories to smart factories has resulted in the automation of production sites using the internet and the internet of things (IoT) technology. Thus, labor-intensive production can easily collect necessary information. However, implementing a smart factory required a significant amount of time, effort, and money. In particular, labor-intensive production industries are not automated, and productivity is determined by human skill. A representative industry of such industries is sewing the industry. In the sewing industry, wherein productivity is determined by the operator's skills. This study suggests that production performance, inventory management and product delivery of the sewing industries can be managed efficiently with existing production method by using smart buttons incorporating IoT functions, without using automated machinery.

• 대한전기학회:학술대회논문집
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• 대한전기학회 1993년도 하계학술대회 논문집 B
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• pp.1084-1087
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• 1993

The importance of reliable electric power has increased rapidly with the proliferation of sophisticated communication systems, computers and critical surgical operations and it considered as one of the most important issues which must be reflected on initial engineering for construction. In this connection, this paper describes the basic conception of peak shaving and cogeneration which are widely used to control the electric power supply recently.

• International Journal of Advanced Culture Technology
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• 제9권4호
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• pp.355-362
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• 2021

Through the Korean version of the New Deal 2.0, manufacturing-oriented SMEs are facing a new environmental change called smart factory construction. In addition, SMEs are facing new security threats along with a contactless environment due to COVID-19. However, it is practically impossible to apply the previously researched and developed security management system to protect the core technology of manufacturing-oriented SMEs due to the lack of economic capacity of SMEs. Therefore, through research on security management systems suitable for SMEs, it is necessary to strengthen their business competitiveness and ensure sustainability through proactive responses to security threats faced by SMEs. The security management system presented in this study is a security management system to prevent technology leakage applicable to SMEs by deriving and reflecting the minimum security requirements in consideration of technology protection point of view, smart factory, and remote access in a non-contact environment. It is also designed in a modular form. The proposed security management system is standardized and can be selectively used by SMEs.

• 한국건축시공학회:학술대회논문집
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• 한국건축시공학회 2021년도 봄 학술논문 발표대회
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• pp.289-290
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• 2021

The PC system has advantages in terms of project management, such as shortening the construction period and reducing costs. However, it is difficult to activate the technology due to insufficient application of the technology. Therefore, there is a need for a strategy to expand and activate the PC system. This study is a basic research for PC construction project management, and its purpose is to derive the entire construction process from factory production of PC components to on-site construction. In this study, the construction process of the PC system was derived through literature review, and the main matters for the construction process management of PC system were confirmed in the analysis process. In the future, the results of this study are expected to be used as basic data for research for PC project management, such as deriving construction classification and calculating construction periods.

• International Journal of Internet, Broadcasting and Communication
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• 제13권3호
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• pp.148-154
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• 2021

We propose the AI Smart Factory Model for integrated management of production processes in this paper .It is an integrated platform system for the production of food packaging containers, consisting of a platform system for the main producer, one or more production partner platform systems, and one or more raw material partner platform systems while each subsystem of the three systems consists of an integrated storage server platform that can be expanded infinitely with flexible systems that can extend client PCs and main servers according to size and integrated management of overall raw materials and production-related information. The hardware collects production site information in real time by using various equipment such as PLCs, on-site PCs, barcode printers, and wireless APs at the production site. MES and e-SCM data are stored in the cloud database server to ensure security and high availability of data, and accumulated as big data. It was built based on the project focused on dissemination and diffusion of the smart factory construction, advancement, and easy maintenance system promoted by the Ministry of SMEs and Startups to enhance the competitiveness of small and medium-sized enterprises (SMEs) manufacturing sites while we plan to propose this model in the paper to state funding projects for SMEs.

• 융합정보논문지
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• 제11권9호
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• pp.138-144
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• 2021

전자부품 조립사업은 제품불량이 발생했을 때, 입고된 원자재불량 또는 작업불량을 추적하는 것이 중요하며, 결과에 따라 납품업체 또는 작업현장 개선이 중요하다. 스마트팩토리의 핵심 과제는 데이터 통합허브를 구축하여 저장·관리·분석을 실시간으로 처리하고 클러스터공정, 에너지, 환경, 안전을 통합관리 하는 것이다. 전자부품 관련 중소기업에 생산현장관리를 실시간 모니터링하여 생산데이터의 정확한 분석과 수집으로 신뢰도를 향상시키기 위해서는 스마트팩토리 구축이 필수적이다. 본 논문은 스마트팩토리를 도입하고자 하는 전자 부품관련 중소기업의 특성을 고려해 시스템 구성방법, 스마트팩토리 관련기술 과 적용사례 등을 정의하여 구축에 활용토록 개발되었다.

• 대한건축학회논문집:계획계
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• 제34권12호
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• pp.145-156
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• 2018

This study explores changes of industrial scales and building activities in the semi-industrial area of Seoul's Seong-su, responding to the shifts of industrial structures and policies in the Korean society. The purpose of this study is to investigate patterns of construction activities of factory buildings in the Seong-su semi-industrial area by analyzing changes in industrial facilities. As a result of the analysis, the change of the factory building area come out from the recent survey implies the possibility of entrepreneurial inflow as much and the new constructions and some remodeling cases which are characterized by complexity seem to correspond to the industrial structure. However, it is unreasonable to believe that this phenomenon is a mainstream movement involving small-scale factory buildings and companies. This is because there are aspects that are not included in this movement, such as changing the use of buildings without accompanying physical changes. On the other hand, compared to various movements of individual companies in response to the industrial structure, the physical plan suggests a limited alternative centering on the floor area ratio and the building area ratio. This means that the efforts to attract and grow the power of knowledge based-industry through the designation of the Industrial Development Promotion District in part of the case sites, overlook the natural change through remodeling and reuse of existing buildings. In addition, considering the fact that the production space of industrial use can be greatly influenced by the behavior of users compared to general buildings such as residential and commercial, it is necessary to pay attention to various phenomena occurring in the area more locally than the uniform supply policy. Based on these findings, this study contributes to illuminate the legal system related to building act in the Seong-su semi-industrial area and the potential direction of architectural suggestions in related policies and researches.

• 한국정보통신학회:학술대회논문집
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• 한국정보통신학회 2021년도 춘계학술대회
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• pp.252-254
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• 2021

산업안전보건연구원에 따르면 2019년 산업재해자 수가 109,242명으로 2018년에 비해 6.8% 증가하였다. 이러한 산업 안전보건 분야는 질병보다 사고가 더 자주 발생하고 있다. 이러한 상황에서 정부와 기업은 건설 시공 분야에서 ICT 기반 현장 안전사고 예방 핵심 기술 개발이 논의되고 있는 실정이다. 이러한 분야에서 최근 컴퓨터 비전과 인공지능을 활용한 기술들이 많이 사용되고 있다. 본 논문에서는 공장 근로자들의 안전관리를 위한 학습 데이터를 구축하고 YOLOv4를 기반으로 모델을 학습시켰다. 이를 통해 공장에서 근로자들의 위험 상황을 예측하는 초기 연구로써 활용할 수 있을 것으로 사료된다.

• Structural Monitoring and Maintenance
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• 제10권3호
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• pp.261-281
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• 2023

Magnetic flux sensors are commonly used in monitoring the cable force, but the application of the sensors in large diameter non-closed Galfan cables, as those adopted in Yueqing Gymnasium which is located in Yueqing City, Zhejiang Province, China and is the largest span hybrid space structure in the world, is seldom done in engineering. Based on the construction of Yueqing Gymnasium, this paper studies the cable tension monitoring using the magnetic flux method across two stages, namely, the pre-calibration stage before the cable leaves the rigging factory and the field tension formation stage of the cable system. In the pre-calibration stage in the cable factory, a series of 1:1 full-scale comparative tests were carried out to study the feasibility and relability of this kind of monitoring method, and the influence on the monitoring results of charging and discharging voltage, sensor location, cable diameter and fitting method were also studied. Some meaningful conclusions were obtained. On this basis, the real-time cable tension monitoring system of the structure based on the magnetic flux method is established. During the construction process, the monitoring results of the cables are in good agreement with the data of the on-site pressure gauge.The work of this paper will provide a useful reference for cable force monitoring in the construction process of long-span spatial structures.

• 전기전자학회논문지
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• 제23권3호
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• pp.1096-1099
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• 2019

본 논문에서는 스마트 팩토리 구축을 위한 프로토콜을 제안한다. 제안하는 스마트 팩토리 구축을 위한 프로토콜은 OPC UA Server/Client, TSN 실시간 통신 기술, NTP & PTP 시간 동기화 프로토콜, 필드버스(Field Bus) 프로토콜 및 컨버젼 모듈, 데이터 전송지연에 대한 저장기술 및 동기화 프로토콜로 구성된다. OPC UA Server/Client 는 산업용 하드웨어 디바이스와 인터페이스 하기 위한 시스템 통합 프로토콜로써 플랫폼에 의존적이지 않고 다방면에서 사용할 수 있는 표준을 지원한다. TSN 실시간 통신 기술은 고속 네트워크 환경에서 디바이스들 간 정확한 시간을 공유함으로써 생산라인 등의 정밀한 시간관리 및 제어기술을 제공한다. NTP & PTP 시간 동기화 프로토콜은 IEEE1588 표준화 기술을 제공한다. 필드버스 프로토콜 및 컨버젼 모듈은 산업에서 주로 사용하는 프로토콜을 OPC로 변환하여 연결의 확장성을 제공한다. 데이터 전송 지연에 대한 저장기술 및 동기화 프로토콜은 데이터 전송 지연과 데이터의 손실에 대한 해결 기능을 제공한다. 제안된 스마트 팩토리 구축을 위한 프로토콜의 성능을 평가하기 위하여 시험기관에서 실험한 결과 응답시간은 0.1367ms, 동기시간은 0.404ms, 동시접속 수는 100개, 프로토콜의 연동개수 5개, 데이터 저장 및 동기화는 1,000노드로 세계최고 수준과 동일한 결과를 산출하였다.