• The Journal of the Korea institute of electronic communication sciences
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• v.8 no.10
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• pp.1435-1441
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• 2013

This paper deals a watt-hour meter monitor system applying a Power Line Communication (PLC) MODEM and a Data Concentrator Unit (DCU) which can apply to Internet map based Graphical User Interface (GUI). The PLC MODEM is profitable by saving the cost of installing dedicated wiring, and Internet map GUI also is able to contribute an easy access to monitoring system for non export users. This system makes it possible to monitor the amount of electricity of previous/ current month metering data via Internet mapping service. The implement system can easily apply a PC-management for the electric charges and maintenance with gathering the metering data.

• Proceedings of the Korean Society of Agricultural Engineers Conference
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• 2001.10a
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• pp.417-420
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• 2001

The monitoring system for maintaining on-site wastewater treatment plants(Biofilter) was developed. Proposed system applied PLC(Programmable Logic Controller) technique. In process of development, the research against the monitoring parameters which will be able to represent condition and operation of the plants was accomplished. These parameters are ORP(Oxidation-Reduction Potential), Water Level, Pump and Power on/off. Also, to measure, collect, transfer and display these parameters, DMU(Data Measurement Unit), MCU(Main Controller Unit) and Display Board were produced.

• Journal of Advanced Navigation Technology
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• v.14 no.6
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• pp.824-830
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• 2010

PLC_Zigbee system, implemented in a previous study, uses ZigBee Node based on PLC (Power Line Communication). The weak point of the system is that the long distance powerline communication and PLC is impossible to use in the areas where the powerline is not installed. In this paper, we added CDMA (Code Division Multiple Access) module using a data transfer method of SMS (Short Message Service) and XBee of WSN (Wireless Sensor Network) module to the previous system, and got around the restriction of place and environment of PLC system through the interfacing of each communication media. We, thus, implemented a wide range of real monitoring system.

• Journal of the Semiconductor & Display Technology
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• v.18 no.4
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• pp.92-95
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• 2019

Automation control and the data for control of industrial equipment for the diagnosis and prediction is a key to success in the 4th industrial revolution. It increases process efficiency and productivity through data collection, realtime monitoring, and the data analysis. However, university and research environment are still suffering from logging the data in manual way, and we occasionally loss the equipment data logging due to the lack of automatic data logging system. State variable presents the current condition of the equipment operation which is closely related to process result, and it is valuable to monitor and analyze the data for the equipment health monitoring. In this paper, we demonstrate the collection of equipment state variable data via programmable logic controller (PLC) and the visualization of the collected data over the Web access supervisory control and data acquisition (SCADA). Test vehicle for the implementation of the suggested SCADA system is a relay switched physical vapor deposition system in the university environment.

• Proceedings of the Korean Society of Precision Engineering Conference
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• 1992.10a
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• pp.307-311
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• 1992

종래의 DNC(Direct Numerical Control)에서 가공 Cell의 효율을 높이기 위한 분산 제어 DNC(Distributed Numerical Control)시스템 운용을 위해서는, 운용에 필요한 소프트웨어 외에 공작기계 및 주변기계에 대한 실시간 감시/제어 기능을 가져야 한다. 이를 위해 당 연구실에서는 경제성 및 확장성을 고려 범용 PLC (Programable Logic Controller)와 각 공작기계 및 주변기기를 연결하고, PC(Personal Computer)와 다자간 및 고속 통신이 가능한 전용 통신회선을 이용한 경제성 있는 실시간 가공 Cell 감시/제어시스템 RT-COMOS(Real Time Machine Cell Control and Monitoring System)를 개발했다. 본 논문에서는 이에 대한 연구결과를 소개한다.

• Proceedings of the Korean Society of Computer Information Conference
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• 2009.01a
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• pp.97-100
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• 2009

홈네트워크 환경에서 정보가전기기를 제어하는데 PLC(전력선통신)나 IR컬트롤러가 사용된다. PLC의 경우 가전기기동작이 명확하지만 IR컨트롤러 같은 경우에는 방향이나 여러 조건에 따라 가전기기동작이 불분명하여 사용자의 명령대로 수행되지 못하는 경우가 발생한다. 본 논문에서는 이러한 상황을 해결하기 위해 가전기가의 상태를 모니터링하여 사용자에게 알려주는 방법을 제안하였다. 동작 상태와 대기 상태의 전류량이 다른점을 이용하여 동작 여부를 판별한다. 제안된 방법을 사용하면 IR 컨트롤러로 동작하는 가전기기의 상태 신뢰성 을 높일 수 있다.

• The Transactions of The Korean Institute of Electrical Engineers
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• v.65 no.1
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• pp.219-226
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• 2016

In this paper, adaptive home power peak-cut control system is developed using PLC. The developed scheme provides monitoring of power usage, power peak-cut control and additional function. In test bed, zone is presented by bedroom, living room, kitchen and bathroom. And individual load is presented by lighting, heater and fan in zone. In developed scheme, zone control is implemented by single PLC modem. And individual load control is implemented by key-map table. In addition, power peak-cut control system S/W, which can perform setting of power peak, power peak-cut control and monitoring of power usage.

• Proceedings of the Korean Society of Precision Engineering Conference
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• 2003.06a
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• pp.1672-1675
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• 2003

In this study, we developed full automation test system for pressure vessel. This pressure vessel containing oxygen, nitrogen and carbon is widely used in industrial field. The test items of pressure vessel are divided into three branches which is weight measurement, water-hydraulic, and leakage test. After leakage test is completed, cleaning and dry progress is carried out. And control system is consist of three controller which is PLC, monitoring system and database system. PLC is control all of system. Monitoring system measures weight, pressure, flow etc and display to all conditions. Database system stores tested data. we design system to control all test modules in communication by a second period with three control modules. Finally, we verified this system by field test.

• International Journal of Precision Engineering and Manufacturing
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• v.5 no.1
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• pp.55-59
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• 2004

This study developed a fully automated test system for pressure vessels, containing such as oxygen, nitrogen, which is widely used in many industries. The pressure vessel test has three major parts including weight measurement test, water-hydraulic test and leakage test followed by cleaning and drying. The control system for these tests consists of three parts: a PLC, a monitoring system and a database management system. The PLC oversees overall control of test machines, while the monitoring system measures and displays weight, pressure, flow etc. for every situations, and the database management system stores test data. These three modules are designed to communicate with one another at 1 Hz frequency alerting problematic situations to the operator. The system has gone through actual field tests for verification of performances.

• Proceedings of the KIEE Conference
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• 2000.07d
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• pp.3189-3191
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• 2000

This paper is aimed to handle quick work for all the workers and to improve the productivity by adding more effective content in Crane Monitoring System. The contributing proportion of the increase of port productivity is more increasing concerning not only the port industry, but also all the informations of container crane which is the representative equipment by the rapid increase of the volume of freight of port. The basic of rapid service is the improvement of the productivity, the information of operation as to the productivity of crane for the quick handling within yard and especially the informations of breakdown and to handle breakdown as soon as possible has a great effect on the increase of productivity.