• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
• /
• 2021.10a
• /
• pp.606-608
• /
• 2021

Humans and various devices are interconnected using the Internet of Things and are used in various ways. In this study, a synchronization control system with remote locations was constructed using ICT, and a signal system for pedestrians was implemented using the system. PLC circuits were used to implement controllers, through which wireless control signal transmission and reception, LED lamp emission control, and power control were performed. It was confirmed that signal synchronization from the main controller to the remote sub-controller was possible by establishing a controller and pedestrian traffic light system, and lamp signal synchronization of the pedestrian traffic light system installed on both sides of the road was implemented. As a result, it was confirmed that 1:1 remote control or 1:N remote group control was possible, and this result can be used in various fields.

• Journal of the Korea Computer Industry Society
• /
• v.9 no.1
• /
• pp.11-20
• /
• 2008

Home network service, which is a part of Ubiquitous application service provides remote control and monitoring service, other appliance and peristaltic service, security service of appliance is connected to network in the home. <중략> By using gateway which is implemented undertook control of each function and using main server for controlling and monitoring of appliance, implemented system which is able to control the appliance in home from inter/outside is implemented.

• The Journal of The Korea Institute of Intelligent Transport Systems
• /
• v.5 no.3 s.11
• /
• pp.24-28
• /
• 2006

This paper proposed design and implementation of automation system that recognize device module boards automatically that are connected on main control board. The system of this paper is divided to main board and device module boards, and the main board is designed a board by slot structure. The slot structure is possible a extension for upgrade and addition of board ability. Besides, it is easier a establishment and disjointing because it recognizes automatically a device board. The proposed system in this paper compares with K10S1 PLC. The result shows an advantage of extensibility and ability, and it is reduced expense and period for development.

• Proceedings of the KIEE Conference
• /
• 2005.07d
• /
• pp.2696-2698
• /
• 2005

기존 형광램프의 조도 조절이 가능한 조광가변 전자식 안정기의 경우 조광 설정 스위치와 조광가변 전자식 안정기와의 상호 연계 동작을 위해 안정기와 스위치 사이에 전원선 이외에 별도의 통신선로를 포설해야 하고, 이에 따른 비용 증가와 시공상의 어려움이 있다. 이런 단점을 극복하기 위한 방법 중의 하나로 전력선 통신을 사용할 경우 기축 건물에도 보다 쉽게 시공할 수 있으며, 별도의 통신 선로 포설에 의한 비용 부담도 줄일 수 있다. 본 연구에서는 (주)젤라인에서 개발된 ARM9 코어를 내장한 전력선 통신 칩(XPLC30)을 이용하여 기존 조광가변 전자식 안정기에 전력선 통신 기능을 추가하여 조광설정 스위치와 안정기간의 통신이 전력선을 통하여 이루어질 수 있도록 하고, XPLC30의 여분의 프로세싱 능력을 활용하여 기존의 조광가변 전자식 안정기에서 사용하던 조광 제어 칩의 여러 기능을 XPLC30 칩이 대신 할 수 있도록 하는 전력선 기반의 조광 체어 칩의 구현에 대한 연구를 하고자 한다.

• The Transactions of the Korean Institute of Electrical Engineers A
• /
• v.48 no.10
• /
• pp.1293-1302
• /
• 1999

In this paper, an on-line process scheme is presented for implementation of a intelligent on-line modeling of nonlinear complex system. The proposed on-line process scheme is composed of FNN-based model algorithm and PLC-based simulator, Here, an adaptive fuzzy-neural networks and HCM(Hard C-Means) clustering method are used as an intelligent identification algorithm for on-line modeling. The adaptive fuzzy-neural networks consists of two distinct modifiable sturctures such as the premise and the consequence part. The parameters of two structures are adapted by a combined hybrid learning algorithm of gradient decent method and least square method. Also we design an interface S/W between PLC(Proguammable Logic Controller) and main PC computer, and construct a monitoring and control simulator for real process system. Accordingly the on-line identification algorithm and interface S/W are used to obtain the on-line FNN model structure and to accomplish the on-line modeling. And using some I/O data gathered partly in the field(plant), computer simulation is carried out to evaluate the performance of FNN model structure generated by the on-line identification algorithm. This simulation results show that the proposed technique can produce the optimal fuzzy model with higher accuracy and feasibility than other works achieved previously.

• Proceedings of the Korean Society for Agricultural Machinery Conference
• /
• 1996.06c
• /
• pp.607-614
• /
• 1996

A computer vision based automatic intelligent sorting system for dried oak mushrooms has been developed. The developed system was composed of automatic devices for mushroom feeding and handling, two sets of computer vision system for grading , and computer with digital I/O board for PLC interface, and pneumatic actuators for the system control. Considering the efficiency of grading process and the real time on-line system implementation, grading was done sequentially at two consecutive independent stages using the captured image of either side. At the first stage, four grades of high quality categories were determined from the cap surface images and at the second stage 8 grades of medium and low quality categories were determined from the gill side images. The previously developed neuro-net based mushroom grading algorithm which allowed real time on-line processing was implemented and tested. Developed system revealed successful performance of sorting capability of approximate y 5, 000 mushrooms/hr per each line i.e. average 0.75 sec/mushroom with the grading accuracy of more than 88%.

• The Journal of the Institute of Internet, Broadcasting and Communication
• /
• v.10 no.3
• /
• pp.159-166
• /
• 2010

As Power Line has been already installed over 60% of a residential area all over the world, Broadband Service has been possible using high-speed PLC(Power Line Communication) without new access line installed for Internet access. Because of such reason, PLC is researched as the most suitable service for Last Mile Solution. But, Power Line is designed for transmitting electric power, so peripheral Wireless Communication System is affected by a leak of electric wave. In this paper, we propose a High Performance Notch Filter algorithm in comparison with a existing notch filter for reduction of interference between existing Wireless Communication Service and Power Line Service. In addition, we implement the Notch Filter emulator appling a High Performance Notch Filter and using a embedded board.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
• /
• 2002.11a
• /
• pp.920-923
• /
• 2002

As the new technologies, such as IEEE 1394, USB, Bluetooth, PLC are appeared, the embedded real time operating system which is satisfied the various technologies is needed. This paper proposed and implemented C standard library which is independently used in real time operating system and which supports an application development interface. The proposed C standard library is based on EL/IX, an Embedded Linux API based on POSIX, which is suitable for other embedded operating systems as well. And because the proposed C standard library has four level, it supports various Internet appliances, such as digital TV, settop box. The developed C library is tested at Qplus-P real time operating system which is developed at ETRI.

• The Transactions of The Korean Institute of Electrical Engineers
• /
• v.64 no.3
• /
• pp.365-369
• /
• 2015

In this paper, geographic information system(GIS) for an intelligent power distribution network was implemented with location informations acquired from automatic meter reading system, where the location informations of power line communication(PLC) modems installed at customer side were collected at data concentration units(DCUs) of headend equipment via PLC and then were transmitted to front end processor server. By displaying the connection status of the power distribution network on GIS map, operation of advanced metering infrastructure(AMI) or management of power grid system could be performed intuitionally and in real time, because the configuration state of the power grid could be easily monitored. The feasibility of the proposed system was confirmed with the especially constructed laboratory-level test bed and the verification test of the system will be carried out for a real power distribution network.

• The Journal of the Institute of Internet, Broadcasting and Communication
• /
• v.11 no.1
• /
• pp.53-59
• /
• 2011

In this paper, the implementation of a production control system has been studied in order to obtain Realtime Cost Calculation using an exact Machine Factor and Man Factor based on RFID reader data transferred through network. For the study, microprocessor built in the controller of production facilities is used and also RFID reader is built additionally. Control part, card reader used for check the beginning and ending working time of workers, and Machine Factor and Man Factor calculated are transferred to server via PLC transmission port, serial transmission port, or Ethernet transmission port. By using the system, the production cost or the production efficiency is calculated exactly. Therefore it is possible to improve production rate and cost reduction by the use of the proposed production control system.