• 한국정보통신학회:학술대회논문집
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• 한국정보통신학회 2021년도 추계학술대회
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• pp.292-294
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• 2021

디지털 트윈 기반 스마트 파이프 통합 관리 시스템은 자기진단 및 상태 감시 기능 센서 기능이 있는 수로 파이프를 지하에 매설하여, 이로부터 데이터를 전송받아 효율적인 운영 및 감시를 위한 통합 솔루션으로 스마트한 의사결정을 통하여 지하 상하 수도관을 혁신적으로 운영할 수 있는 시스템이다. 원격제어및 모니터링이 주요한 기능의 하나이기 때문에 어떻게 실시간으로 모니터링을 구성할 것인가 하는 사안은 중요한 이슈이다. 우리는 이를 위하여 특별한 실시간 기반의 에이전트 기능을 설계하였다. 본 논문에서는 이러한 이슈를 해결하기 위하여 센서 데이터들을 주고받는 전송 포인트를 기준으로 계층적 구조(Layered Architecture)를 제안하였다. 각각의 계층들에는 에이전트를 위치시키어 하위 계층을 바라보고 센서의 변화가 있는지를 실시간으로 주기적 감시를 진행하도록 하였다. 이에 대한 에이전트 시스템을 설계하고 개념모델 수준의 구현을 진행하여 우수성을 검증하였다.

• 전기의세계
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• 제62권12호
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• pp.21-27
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• 2013

• International Journal of Internet, Broadcasting and Communication
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• 제12권4호
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• pp.109-121
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• 2020

As a decrease in labor became a serious issue in the manufacturing industry, smart factory technology, which combines IT and the manufacturing business, began to attract attention as a solution. In this study, we have designed and implemented a real-time remote management system for smart factories, which is connected to an IoT sensor and gateway, for plastic manufacturing plants. By implementing the REST API in which an IoT sensor and smart gateway can communicate, the system enabled the data measured from the IoT sensor and equipment status data to the real-time monitoring system through the gateway. Also, a web-based management dashboard enabled remote monitoring and control of the equipment and raw material processing status. A comparative analysis experiment was conducted on the suggested system for the difference in processing speed based on equipment and measurement data number change. The experiment confirmed that saving equipment measurement data using cache mechanisim offered faster processing speed. Through the result our works can provide the basic framework to factory which need implement remote management system.

• 디지털산업정보학회논문지
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• 제8권4호
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• pp.151-157
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• 2012

This paper implements an effective attendance management and monitoring system utilizing the RFID(Radio Frequency IDentification) and Smart phone for student. In this paper, RFID system use 13.56MHz to control the attendance, and we can show that information of RFID and dynamic image through IP camera in Smart phone. We also make up the contents and database utilizing the labview program in computer. Especially, proposed technique can obtain dynamic image by server implementation at real time basis so that it is possible to use simultaneously several Smart phone. From the various and practical experiment, it is confirm that proposed system is useful for attendance management and remotely monitoring.

• Smart Structures and Systems
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• 제1권2호
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• pp.159-184
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• 2005

The paper intends to summarize some guidelines for future smart structure system application in military aircraft. This preview of system integration is based upon a review on approximately one and a half decades of application oriented aerospace related smart structures research. Achievements in the area of structural health monitoring, adaptive shape, adaptive load bearing devices and active vibration control have been reached, potentials have been identified, several feasibility studies have been performed and some smart technologies have been already implemented. However the realization of anticipated visions and previously initial timescales announced have been rather too optimistic. The current development shall be based on a more realistic basis including more emphasis on fundamental aircraft strength, stiffness, static and dynamic load and stability requirements of aircraft and interdisciplinary integration requirements and improvements of integrated actors, actuator systems and control systems including micro controllers.

• 한국소음진동공학회:학술대회논문집
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• 한국소음진동공학회 2003년도 추계학술대회논문집
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• pp.21-32
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• 2003

Developments and applications of the structural health monitoring (SHM) systems have become active particularity for long-span bridges in Korea. They are composed of sensors, data acquisition system, data transmission system, information processing, damage assessment, and information management. In this paper, current status of research and application activities on SHM systems for civil infra-structures in Korea are briefly introduced by 4 parts: (1) current status of bridge monitoring systems on existing and newly constructed bridges, (2) research and development activities on smart sensors such as optical fiber sensors and piezo-electric sensors, (3) structural damage detection methods using measured data, and (4) a test road project for pavement design verification and enhancement by the Korea Highway Corporation. Finally the R＆D activities of a new engineering research center entitled Smart Infra-Structure Technology Center at Korea Advanced Institute of Science and Technology are also briefly described.

• 한국산업융합학회 논문집
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• 제22권5호
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• pp.561-573
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• 2019

This study proposes a new approach to implement smart factory based on robot monitoring system for a small and medium sized enterprise. The simulator includes the forward kinematics and inverse kinematics analyzes of articulated robots. We also modeled the dynamics of the robot and made it possible to simulate it in the program. We studied the interface between the user and the monitoring programming system using the GUI environment of Windows OS, and it is configured to select the appropriate trajectory planning and control method. The reliability of simulator is illustrated by simulation test.

• 센서학회지
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• 제31권2호
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• pp.79-84
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• 2022

Self-powered sensors play an important role in everyday life, and they cover a wide range of topics. These sensors are meant to measure the amount of relevant motion and transform the biomechanical activities into electrical signals using triboelectric nanogenerators (TENGs) since they are sensitive to external stimuli such as pressure, temperature, wetness, and motion. The present advancement of TENGs-based self-powered wearable, implantable, and patchable sensors for healthcare monitoring, human body motion, and medication delivery systems was carefully emphasized in this study. The use of TENG technology to generate electrical energy in real-time using self-powered sensors has been the topic of considerable research among various leading scholars. TENGs have been used in a variety of applications, including biomedical and healthcare physical sensors, wearable devices, biomedical, human-machine interface, chemical and environmental monitoring, smart traffic, smart cities, robotics, and fiber and fabric sensors, among others, as efficient mechanical-to-electric energy conversion technologies. In this evaluation, the progress accomplished by TENG in several areas is extensively reviewed. There will be a discussion on the future of self-powered sensors.

• 한국멀티미디어학회논문지
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• 제25권8호
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• pp.1085-1096
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• 2022

The manufacturing industry is continuously pursuing advanced technology and smartization as it converges with innovative technology. Improvement of manufacturing productivity is achieved by monitoring, analyzing, and controlling the facilities and processes of the manufacturing site in real time through a network. In this paper, we proposed a new OPC-UA based digital twin model for smart factory facilities. A testbed system for USB flash drive packaging facility was implemented based on the proposed digital twin model and OPC-UA data communication scheme. Through OPC-UA based digital twin model, equipment and process status information is transmitted and received from PLC to monitoring and control 3D digital models and physical models in real time. The usefulness of the developed digital twin testbed system was evaluated through usability test.

• 소프트웨어공학소사이어티 논문지
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• 제28권2호
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• pp.1-6
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• 2019

블록체인 생태계에는 다양한 이해관계자들이 존재한다. 이더리움이 등장한 이후 스마트 컨트랙트를 활용한 거래가 많이 이루어지게 되었고 개발자뿐만 아니라 투자자, 은행, 기업, 일반 사용자 등등 더욱 폭넓은 이해관계자들이 참여하고 활동하고 있다. 하지만 다양한 이해관계자가 스마트 컨트랙트의 상태를 확인하기 위해서는 어렵고 복잡한 과정을 거쳐야 한다는 문제점을 가지고 있다. 상태 확인이 어렵게 된다면 스마트 컨트랙트에 대한 신뢰도가 낮아지게 되어 활용도가 낮아질 것이다. 개발자에게 있어서도 상태 확인이 어렵고 복잡하다면 자신이 개발한 스마트 컨트랙트의 테스팅과 디버깅을 하는데 어려움을 겪어 높은 품질을 제공하기 힘들 것이다. 본 연구에서는 다양한 이해관계자와 개발자들이 스마트 컨트랙트의 상태를 쉽고 지속적으로 확인할 수 있으며 히스토리 데이터를 활용하여 분석할 수 있도록하는 이더리움 스마트 컨트랙트 상태 모니터링 시스템의 설계 및 구현 방법을 제안한다.