• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2008.05a
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• pp.841-844
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• 2008

This paper describes technical method about remote control and monitoring of local system by use internet web connection system, which connect local system and system manager works in long distance office. The local system, which will be controlled remotely have constructed with analog/digital signal acquisition device, signal control board and their software. The local systems are constructed with several electronic modules need AC or DC power supply to operate the right way. We used NI labview software to control and monitoring of local system. The computer server for remote connection are constructed with Apache web server, PHP and MySQL ODBC. The experiment for the remote control are need internet web browser which load local control software. By use of web system, we have experimented control and monitoring of local electronic module.

• Korean Journal of Ecology and Environment
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• v.54 no.4
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• pp.272-279
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• 2021

A pump-type eDNA filtering system that can control voltage and hydraulic pressure respectively has been developed, and applied a filter case that can filter out without damaging the filter. The filtering performance of the developed system was evaluated by comparing the eDNA concentration with the conventional vacuum-pressured filtering method at the catchment conduit intake reservoir. The developed system was divided into a voltage control (manual pump system) method and a pressure control (automatic pump system) method, and the pressure was measured during filtering and the pressure change of each system was compared. The voltage control method started with 65 [KPa] at the beginning of the filtering, and as the filtering time elapsed, the amount of filtrate accumulated in the filter increased, so the pressure gradually increased. As a result of controlling the pressure control method to maintain a constant pressure according to the designed algorithm, there was a difference in the width of the hydraulic pressure fluctuation during the filtering process according to the feedback time of the hydraulic pressure sensor, and it was confirmed that the pressure was converged to the target pressure. The filtering performance of the developed system was confirmed by measuring the eDNA concentration and comparing the voltage control method and the hydraulic control method with the control group. The voltage control method obtained similar results to the control group, but the hydraulic control method showed lower results than the control group. It is considered that the low eDNA concentration in the hydraulic control method is due to the large pressure deviation during filtering and maintaining a constant pressure during the filtering process. Therefore, rather than maintaining a constant pressure during filtering, it was confirmed that a voltage control method in which the pressure is gradually increased as the filtrate increases with the lapse of filtering time is suitable for collecting eDNA. As a result of comparing the average concentration of eDNA in lentic zone and lotic zone as a control group, it was found to be 96.2 [ng µL^-1] and 88.4 [ng µL^-1l], respectively. The result of comparing the average concentration of eDNA by the pump method was also high in the lentic zone sample as 90.7 [ng µL^-1] and 74.8 [ng µL^-1] in the lentic zone and the lotic zone, respectively. The high eDNA concentration in the lentic zone is thought to be due to the influence of microorganisms including the remaining eDNA.

• Proceedings of the Korea Information Processing Society Conference
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• 2003.11b
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• pp.1015-1018
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• 2003

과거 우리는 플랫폼 독립적인 XML과 GUI 기반의 툴들을 제공하여 장비에 대한 제어 및 모니터링 소프트웨어의 효율적인 생성과 유지보수성을 향상하기 위한 프레임워크[1][2]를 제안하였다. 제안한 프레임워크는 세 가지의 XML 문서(IID, MAP, CMIHL), VI Wizard, Generator로 구성되었다. 본 논문에서는 제안한 프레임워크의 한 구성요소인 Generator에 대한 설계와 구현을 보인다. Generator는 장비의 제어정보 모니터링 정보, 통신 정보, 스케줄 정보, 제어 소프트웨어의 사용자 인터페이스 정보 등을 기술하는 CMIML(Control & Monitor ing Instrument Markup Language) 문서를 이용해서 GUI 기반의 사용자 인터페이스 편집 환경을 제공하고, CMIML 문서를 소프트웨어 코드로 변환함으로써 제어 및 모니터링 소프트웨어를 자동 생성한다.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.13 no.3
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• pp.514-521
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• 2009

The current control for Interior-mounted Permanent Magnet Motor(IPM Motor) is more complicate than Surface-mounted Permanent magnet Motor(SPM Motor) because of its torque characteristic depending on the reluctance. For high performance torque control, it requirs state decoupling between d-axis current and q-axis current dynamics. However the variation of the inductances, which couples the state dynamics of the currents, makes the state decoupling difficult. So some decoupling methods have developed to cope this variation and each current can be regulated independently. This paper proposes a novel approach for fully decoupling the states cross-coupling using sliding mode control with virtual state for IPM Motor. As a result, in spite of the parameter uncertainty and disturbance, the proposed sliding surface can have the dynamics of nominal system controlled by PI controller.

• Journal of the Korean Society for Nondestructive Testing
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• v.23 no.1
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• pp.21-29
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• 2003

It is very important to reduce the computational time in estimating the parameters of vision control algorithm for robot's position control in real time. Unfortunately, the batch estimation commonly used requires too murk computational time because it is iteration method. So, the batch estimation has difficulty for robot's position control in real time. On the other hand, the Extended Kalman Filtering(EKF) has many advantages to calculate the parameters of vision system in that it is a simple and efficient recursive procedures. Thus, this study is to develop the EKF algorithm for the robot's vision control in real time. The vision system model used in this study involves six parameters to account for the inner(orientation, focal length etc) and outer (the relative location between robot and camera) parameters of camera. Then, EKF has been first applied to estimate these parameters, and then with these estimated parameters, also to estimate the robot's joint angles used for robot's operation. finally, the practicality of vision control scheme based on the EKF has been experimentally verified by performing the robot's position control.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.20 no.11
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• pp.2100-2106
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• 2016

The automation system uses PLC to monitor the manufacturing process status of the production product and processes the sensor information transmitted from the sensor. In this paper, we propose a remote surveillance system to monitor the status of control relay used in automation system. The proposed system consists of a control relay module, a one-chip processor module, a computer monitoring system, and a database system that inputs and manages the details of the control relay. The computer monitoring system is configured to monitor the operating condition and life time of the control relay. The database is configured so that the input date of the control relay can be input and corrected, and the operating state information of the control relay can be automatically printed. In the remote monitoring system, the failure status of the control relay is recognized in real time, and the time required for normal operation can be minimized by quickly replacing faulty parts.

• Journal of KIISE:Computer Systems and Theory
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• v.32 no.7
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• pp.359-367
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• 2005

This paper presents a scheduling approach for synthesizing pipelined datapaths under resource constraints. The proposed approach evaluates whether or not a scheduling solution can exist in case an operation temporarily is assigned to the earliest or latest control step among the assignable steps for the operation. If a solution cannot be found, it is impossible to assign the operation to that control step due to a violation against resource constraints, and so we can eliminate that control step among candidate assignable control steps. The proposed algorithm builds up a schedule based on gradual mobility reduction and finds a solution that yields high performance by evaluating on the impact on register assignment. Experiments on benchmarks show that this approach gains a considerable improvement over previous approaches.

• Proceedings of the Optical Society of Korea Conference
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• 2002.07a
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• pp.198-199
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• 2002

진공 증착장비에서 다층박막으로 구성된 광학필터를 증착할 경우, 증착되는 동안 설계된 최종 광학필터의 성능을 구현하기 위해서는 실시간으로 각각의 층들에 대한 굴절률(n)과 물리적 두께(d)를 제어하거나 또는 광학적 두께(nd)를 제어해야 한다. 광학적 두께를 제어하는 대표적인 예로 광모니터링 방법이 있는데, 증착되는 기판에 직접 빛을 입사시켜 기판에서 반사된 빛이나 투과된 빛의 세기를 측정하여 증착과정을 제어하는 방법이다. (중략)

• Journal of Internet of Things and Convergence
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• v.6 no.3
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• pp.7-13
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• 2020

In this paper, we propose a system that monitors and controls the environment of a server room in real-time based on IoT. Recently, as the information society has been maximized, the damage has been significant when the computer system is down. In particular, damage such as a fire in the server room leads to loss of data and data recovery becomes impossible. In order to reduce such damage, a node capable of real-time monitoring using an IoT system was proposed. In addition, we proposed a coordinator node that can collect and monitor node information. In order to verify that the proposed system works, we have developed software that can control node monitoring and air conditioning. As a result of the experiment, we confirmed that the proposed system detects fire and controls the air conditioner.

• Proceedings of the Korean Society of Computer Information Conference
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• 2015.01a
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• pp.213-216
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• 2015

본 연구에서는 정보 수집을 기반으로 멀티미디어 서비스의 QoS를 효과적으로 지원하기 위한 프로파일 모니터링 방법을 제시하고자 한다. 가입자 단말기는 모니터링을 통하여 자신의 현재 상태 및 주변 기지국 정보를 수집하며, 기지국은 내부 및 인접한 기지국 모니터링으로 수집된 정보를 기반으로 관련 제어 데이터를 공유하고 이를 종합 분석함으로써 QoS를 자체적으로 제어할 수 있다. 제안되는 모니터링 기법은 단말기 및 기지국의 상태 정보 변화에 따라 관련 기능의 설정을 동적으로 제어하고, 각각의 기능들이 변화에 적응하여 조정되고 재구성하는 과정을 반복함으로써 각 기능들이 상호 작용하도록 유도한다.