• 한국정밀공학회:학술대회논문집
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• 한국정밀공학회 2008년도 춘계학술대회 논문집
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• pp.299-300
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• 2008

• 한국산학기술학회논문지
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• 제13권9호
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• pp.4341-4348
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• 2012

본 논문은 와이파이 무선 인터페이스를 채택한 웹-기반 실시간 광생물 반응기 모니터링 시스템을 제안한다. 와이파이 무선 네트워크는 11Mbps의 고속 데이터 전송이 가능할 뿐만 아니라 기존 무선 랜 환경과 호환되기 때문에 쉽게 사용자의 요구에 따른 재구성형 광생물 반응기와 모니터링 시스템에 적용이 가능하다. 본 논문에서는 실제 상용 광생물 반응기에 와이파이 무선 데이터 전송 모듈을 탑재하여 무선 네트워크 환경을 구성하였고, 또한 여러 대의 광생물 반응기의 배양 환경을 실시간으로 모니터링 할 수 있는 응용 S/W를 개발하여 동작을 검증하였다. 본 논문의 연구 결과는 미세조류 장치뿐만 아니라 다양한 바이오 장치 산업의 핵심 기기들을 무선 네트워크로 연결하고 모니터링 환경을 구축하는데 적용할 수 있을 것으로 기대된다.

• 한국산학기술학회논문지
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• 제10권11호
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• pp.3098-3103
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• 2009

본 논문에서는 실제 네트워크 트래픽 측정을 통해 트래픽의 Self-similar 특성을 관찰하고, Self-similar 특성을 갖는 TCP-MT 기반 모델과 지수 분포 모델의 트래픽을 비교 분석함으로써, 최적화 된 네트워크 설계 및 성능분석을 이루고자 한다.

• 산업공학
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• 제7권3호
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• pp.69-76
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• 1994

In this paper, we develop a real-time manufacturing control and information management(POP) system that can support realization of CIM and information network of manufacturing system. The POP system systematically collect informal data that is originated from working area and make an offer collected information to planning side. Especially, this study designs a modular POP terminal that directly extract and process momentary information from field source and provide it to control system on real-time. In addition, we apply developed POP system with open architecture to flexibly and optimally operate the manufacturing system based on CIM.

• 한국정보통신학회:학술대회논문집
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• 한국정보통신학회 2021년도 추계학술대회
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• pp.313-316
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• 2021

사물인터넷 환경에서는 기본적으로 사물에서 발생되는 데이터를 수집하기 위하여 네트워크 구성이 필수적이다. 다양한 통신 방식으로 사물의 데이터를 처리하고 있으며, 주로 블루투스, WiFi와 같은 무선 통신 방식을 주로 사용하지만, 데이터 서버에 다양한 센서 데이터를 전달하기 위해 유선/무선 통신을 혼합해서 사용하는 경우도 있다. 사물의 데이터를 수집하려면, 센서나 엣지 장치에서 발생되는 센서 데이터를 실시간으로 수집하기 위해 통신 모듈이 탑재되어야 한다. 그리고 데이터베이스로 데이터를 전달하기 위하여 소프트웨어 아키텍처가 구성되어야 한다. 센서에서 발생된 데이터를 실시간으로 데이터 베이스에 저장하고 관리할 수 있으며, 산업안전에 필요한 데이터를 추출하여 산업안전서비스 응용에 활용할 수 있다. 본 논문에서는 사물 데이터 수집을 위하여 LoRa 게이트웨이를 활용하여 네트워크 환경을 구성하였으며, LoRa 모듈로부터 전달되는 사물 데이터를 수집하기 위하여 클라이언트/서버 방식의 데이터 수집 모델을 설계하였다. 데이터 수집과 저장 관리에 필요한 자원을 데이터 누수 없이 확보하기 위하여 실시간으로 데이터 수집이 가능해야 하며, 응용서비스로는 산업안전에 필요한 위치데이터 등을 실시간으로 데이터베이스에 저장 관리할 수 있도록 설계하였다.

• 산업경영시스템학회지
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• 제13권22호
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• pp.87-98
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• 1990

The performance analysis and capacity planning of Service Control Point which is real time response system is studied. The system is modeled by multiclass open queueing network. The analytical method is used to solve the queueing network. The solution of the model has product form solution. The focus of this paper is to investigate the capacity of system under the restriction of response time. To get the reasonable capacities, nonlinear programming problem is formulated and is solved by GINO. And the simulation model using SLAM II is formulated.

• 대한임베디드공학회논문지
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• 제11권3호
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• pp.143-151
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• 2016

In this paper, a real-time air quality monitoring system based on wireless network is designed and implemented for industrial park or multiuse facilities. The existing gas detector is high price and hard to apply the remote monitoring system. On the other hand, demand for air quality monitoring is increasing because of industrial gas accident, air pollution, and so on. In Korea, indoor air regulation was established by law. According to indoor air regulation, CO2, CO, and NO2 are important gases as the air quality standard. So we study the gas detector for indoor air quality and the wireless network system. The wireless network consist of sensor network and WCDMA to apply various place. To verify the performance of the implemented gas detector, the gas measurement experiment is performed in laboratory environment by using the realized gas detecting wireless sensor node. And we evaluate the experiment results.

• International Journal of Internet, Broadcasting and Communication
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• 제8권1호
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• pp.64-68
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• 2016

These fields are integrated to visualize and finalize the proposed development, in simulation environment. SCADA (supervisory control and data acquisition) systems and distributed control systems (DCSs) are widely deployed in all over the world, which are designed to control the industrial infrastructures, in real ways. To supervise and control the various parts of designed systems; trends to require a deep knowledge to understand the overall functional needs of industries, which could be a big challenge. Industrial field devices (or network sensors) are usually distributed in many locations and are controlled from centralized site (or main control center); the communication provides various signs of security issues. To handle these issues, the research contribution will twofold: a method using cryptography is deployed in critical systems for security purposes and overall transmission is controlled from main controller site. At controller site, multimedia components are employed to control the overall transmission graphically, such as system communication, bytes flows, security embedded parameters and others, by the means of multimedia technology.

• 한국공작기계학회:학술대회논문집
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• 한국공작기계학회 1996년도 추계학술대회 논문
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• pp.133-137
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• 1996

This paper presents a new approach to the design of neural control system using digital signal processors in order to improve the precision and robustness. Robotic manipulators have bevome increasingly important in the field of flexible automation. High speed and high-precision trajectory tracking arre indispensable capabilities for their versatile application. the need to meet demanding control requirement in increasingly complex dynamical control systems under sygnificant uncertainties leads toward design of implementing real time neural control to provide an enhanced motion control for robotic manipulators. In this control scheme the ntworks intrduced are neural nets with dynamic neurouns whose dynamics are distributed over all the network nodes. The nets are trained by the distributed dynamic are distributed over all the network nodes. The nets are trained by the distributed dynamic back propagation algorithm. The proposed neural network control scheme is simple in structure fast in computation and suitable for implementation of real-time control, Performance of the neural controller is illustrated by simulation and experimental results for a SCAEA robot.

• 대한산업공학회지
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• 제41권5호
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• pp.414-424
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• 2015

In this research, we consider a smart grid network of electricity with multiple consumers connected to a monopolistic provider. Each consumer can be informed the real time price changes through the smart meter and updates his consumption schedule to minimize the energy consumption expenditures by which the required power demand should be satisfied under the given real time pricing scheme. This real-time decision making problem has been recently studied through game-theoretic approach. The present paper contributes to the existing literature by incorporating storage appliance into the set of available household appliances which has somewhat distinctive functions compared to other types of appliances and would be regarded to play a significant role in energy consumption scheduling for the future smart grid. We propose a game-theoretic algorithm which could draw the optimal energy consumption scheduling for each household appliances including storage. Results on simulation data showed that the storage contributed to increase the efficiency of energy consumption pattern in the viewpoint of not only individual consumer but also whole system.