• Journal of the Korea Institute of Information and Communication Engineering
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• v.8 no.2
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• pp.494-498
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• 2004

In this paper, a system that implementation of Access Control System Using Biometric System. Biometries is science which deals with verifying or recognizing using physiological or behavioral characteristic Access Control System uses Bionietric system to make an access control system. Biometrics goes under the study of bio-recognition or bio-measurement. It is a technology or study that identifies individuals using one's Biometric character. Access control system is a system used to identify one's entrance and exit, personal management, and security. Access control system can be joined with Biometric system to produce easier use and more sufficient effects. Access control system using Weigand (Data format) signal output, can replace earlier RF Card systems and make an access control (security) system. It uses RS-232, Rs-422 or TCP/IP type communication with the computer so an embedded system can be controlled using the software.

• The Journal of the Institute of Internet, Broadcasting and Communication
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• v.8 no.5
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• pp.73-80
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• 2008

The recent trend in home network system includes intelligent home environments that remote monitoring and control service is achieved without restrictions by device types, time, and place. Also the use of a vacuum robot in homes is gradually generalized on account of the convenience of the use. In this paper, we proposed and realized new home-monitoring system with the employment of an self-movement robot as one trial for realizing an intelligent home under home network environment. The proposed system can freely monitor every where in home, because the system effectively overcame the surveillance limitations of the existing monitoring system by attaching a Wireless Router and WebCam to a commercial vacuum robot. The outdoor users of this system can readily monitor any place which they want to supervise by controlling a vacuum robot with mobile telecommunication devices such as PDA. The wireless router installed with Linux operation system "OpenWrt" made it possible for the system users to transmit images and to control a vacuum robot with RS-232 communication.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.12 no.2
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• pp.247-253
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• 2008

In this paper, we describes the design and implementation of real-time management system for efficient operation via monitoring and control of MCC(Motor Control Center). The real-tine management system can be divided hardware(MCC panel) and software(management program). First, hardware is divided into load attaching motor and MCC components for working together control and data network. Second, software(management system) are consisted of communication interface, environment setting, data processing modules. The produced and implemented reduction model of MCC panel is pretested using m-PRO, iM-PRO devices, and HyperTerminal. For field test, MCC panel is tested by RS-232C/485, communication procedure in management system is certified by transmitting and receiving message using control command. By the experimental results, the implemented real-time management system can be used to operate MCC system.

• Proceedings of the Korea Information Processing Society Conference
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• 2006.05a
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• pp.281-284
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• 2006

최근 산업용 내장형 소프트웨어는 높은 부가가치를 창출할 수 있는 분야로 각광을 받고 있다. 최근 산업용 기기의 하드웨어뿐 아니라 내장형 소프트웨어에 대한 품질 시험 및 인증을 위한 기반 연구가 활발히 수행되고 있다. 본 연구는 산업용 소프트웨어 국제표준 적합성 인증」사업 추진과 관련하여 산업용 소프트웨어의 통신 기능에 대한 성능 평가 시험을 위하여 다양한 통신 프로토콜을 지원하는 시뮬레이션 소프트웨어를 개발한 것이다 소프트웨어는 산업용 통신 프로토콜인 필드버스 방식(Profibus, DeviceNet, CAN, RS232C, RS485, RS422등) 및 이더넷 기반의 TCP/IP 프로토콜에 대한 통신 시뮬레이션 시험 기능을 가지고 있으며, 프로토콜별 패킷 프레임을 사용자가 임의적으로 설정할 수 있게 하여 다양한 통신환경에서의 시뮬레이션 시험을 지원하고 각 프로토콜은 단방향 및 양방향시험을 모두 지원한다. 본 논문에서는 프로토콜별 시험 항목 및 방법을 소개하고 시뮬레이선 시스템의 하드웨어와 소프트웨어 구성 및 운영환경을 기술하였다.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.10 no.5
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• pp.921-927
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• 2006

The current DGPS technique is many problems that is permission of radio station using RF Wireless Modem, that is influence of geographic obstacle using radio wave, that is frequency interference, that is finiteness of frequency resources. In this paper, we are solved many elements, IM(Interface Module) replaces RF Wireless Modem, we suggest transmission technique of correction message using mobile phone, we researched Interface Module development which is linkage of DGPS receiver and mobile phone. IM can transmit correction message passing RS-232 port and modem communication control. IM of base station is initialized RS-232 port and modem to move station for correction message transmission, IM waited response mode. IM of move station is initialized RS-232 port and modem, IM requests hand shaking to base station, completed connection establishment. Users are worked Differential surveying using receiving correction message between mobile phones.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2002.05a
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• pp.545-548
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• 2002

선박의 안전한 항해를 위해서 필수 장비 중 하나인 기상 팩스 장비는 연안국에서 FSK 방식으로 변조된 무선 주파수를 통해서 보내는 기상도를 선박에서 수신하여 이미지화 하는 장비이다. 연안국에서는 기상도를 스캔 한 후에 중심 주파수를 1900Hz로 하고, 흑점을 1500Hz, 백점을 2300Hz 신호로 FSK 변조하여 방송하면 선박에서 이 신호를 수신한다. 따라서 현재는 기상 팩스를 받기 위해서는 기상 팩스 장비가 필요하다. 본 논문에서는 선박에 일반적으로 설치되어 있는 IBM-PC를 이용하여 소프트웨어만을 사용하여 기존의 기상 팩스 장비가 가지고 있는 모든 기능을 구현하고, 기상도의 출력, 편집, 저장 기능을 추가로 설계 및 구현하였다. IBM-PC에서는 RS-232C 보트를 통해 수신된 신호를 Timer Interrupt와 Serial Interrupt를 사용하여 이미지화 하고 주파수를 선택할 수 있게 하고, 실시간 처리 등을 소프트웨어적으로 가능하게 하였다. IBM-PC를 사용함으로 기상도의 수신 및 상태를 개선하는 이미지의 보정이 가능하며, 저장 후 처리가 용이하고, 별도의 기상 팩스 장비를 구입할 필요가 없는 경제적인 기상 팩스 시스템이다.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2002.11a
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• pp.539-542
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• 2002

본 논문에서 는 64채널 DWDM(Dense Wavelength Division Multiplexing)용 광원(Optical Source)을 구현하고, 이를 효율적으로 제어하기 위하여 I$^2$C Bus interface를 이용한 제어기를 설계하였다. 채널은 독립적으로 동작될 수 있도록 각각 Laser Diode 구동 회로와 마이크로프로세서, A/D 및 D/A 컨버터로 구성하였으며, 또한 각 채널들은 하나의 I$^2$C Bus를 통해 주 제어기와 연결된다 주 제어기는 RS-232 및 LAN을 통해 틀어오는 사용자의 명령을 I$^2$C Bus를 이용하여 각 채널에 전달하고, 채널로부터 들어오는 정보를 사용자에게 제공한다. RS-232C 및 LAN을 통한 PC와의 전송속도는 57600BPS로 구현하였다.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2008.10a
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• pp.842-845
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• 2008

This paper propose a dormitory management system based on 13.56MHz RFID system. The proposed dormitory management system consists of three parts, the RFID hardware system the middleware, and the application. RFID hardware system uses 13.56MHz frequency which is suitable for a close range. The middleware is implemented to accept the RFID hardware system values using RS-232c communication method and forward the values to the application. The application is designed to make the DB using the forwarded values, and works based on the DB. The efficacy of the proposed dormitory management system is verified by means of experiments. In the experiments, we set up the system to the dormitory of Daeduk College to show the improvement results of proposed system.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2003.05a
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• pp.179-182
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• 2003

This study is about the development of a system related to the CATV network. It intends to develop an automatically centralized Headend system and a distributive system to remove the ineffectiveness of the established manual system. To achieve this goal, we took a part of bandwidth, which is not used for the transmission of video signals in the established frequency bandwidth, and used it for the transmission and receiver and a automatic distributive system. We developed an information management system for the 9600bps CATV using RS-232 of forward/backward communication and backward communication. Based on window, It consist of ID generation, transmitter/receiver, control and backup part.

• The Journal of the Korea Contents Association
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• v.4 no.1
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• pp.1-7
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• 2004

In addition to wired communication technology, wireless communication technology has been driving communication revolution nowadays. Bluetooth technology carries out data/voice communication making pico-net and the various application services are supported by access network connected to public network. This paper presents educational software development of bluetooth protocol stack including HCI, L2CAP, RFCOMM, SDP and profiles including GAP, SPP, GEOP, FTP. This software which supports programming environment of these protocol monitoring and emulation is implemented basically step by step for education based on H connected to the bluetooth device through RS-232-C, UART or USB cable. Application program coded by Visual C is operated over the firmware loaded on the bluetooth device connected to the PC. Additionally ftp and chatting function are developed to enhance educational efficiency.