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손형곤,주문갑,우힘찬,강무성,설재훈 대한임베디드공학회 2017 대한임베디드공학회논문지 Vol.12 No.6
As the number of sensors in a ship has increased, studies have been actively conducted to efficiently manage a large amount of data. Sensors in a ship follow the NMEA (National Marine Electronics Association) data format. In particular, NMEA0183 standardized as IEC 61162-1 and NMEA2000 standardized as IEC 61162-3 are widely used. NMEA0183 is a protocol based on serial communication and NMEA2000 is a protocol based on CAN (Controller Area Network) communication. We implemented a gateway that receives data from NMEA0183 sensors and NMEA2000 sensors and then transmits them to the server on TCP/IP network. By using the NMEA2000 0183/2000 gateway to receive the sensor data and manage it through the ship's preventive maintenance system, the sensor data can be utilized efficiently and promptly. This management can reduce crew’s daily tasks and reduce the number of accidents.
우힘찬,손형곤,이승훈,주문갑 대한임베디드공학회 2018 대한임베디드공학회논문지 Vol.13 No.1
In this paper, we describe an sound tracking mobile robot suitable for areas where GPS is not available. Sound sensors are attached to four sides of the robot in order to locate the person in a danger, and the robot is supposed to move to the yelling person. The traveling distance of the mobile robot is calculated by the encoder attached to the wheel of the mobile robot. The moving direction of the mobile robot is measured by a gyro sensor on the robot. When the person in danger pushes a button of the mobile robot, the mobile robot transmits the trajectory data to a designated server.
변의석,임기욱,손형곤 한국경영과학회 2001 한국경영과학회 학술대회논문집 Vol.- No.1(2)
정보화가 발달됨에 따라 정보에 대한 피해가 빈번하게 발생하고 있으며, 해킹 및 컴퓨터 바이러스 유포 등 정보범죄가 늘어나고 있다. 정보보호가 이루어지지 못하면 정보화의 가치와 의미를 상실하게 되며, 정보시스템의 기밀성, 무결성, 또는 가용성에 손실이 오는 경우에는 경제적, 국가적으로 심각한 영향을 초래하게 된다. 특히, 무선 인터넷 보안기술의 수요가 증가하고 있는 현 시점에 본 연구는 기존의 정보보호 기술을 기반기술, 네트워크 보호기술, 응용보호기술 등으로 분류하여 국내외 동향과 향후 발전방향을 전망해 본다.
주문갑,우힘찬,손형곤,Joo, Moon-Gab,Woo, Him-Chan,Son, Hyeong-Gon 대한임베디드공학회 2017 대한임베디드공학회논문지 Vol.12 No.5
A reduced order observer is developed for depth control of a hybrid underwater glider which combines the good aspects of a conventional autonomous underwater vehicle and a underwater glider. State variables include the center of gravity of the robot and the weight of the buoyancy bag, which can not be directly measured. By using the mathematical model and available information such as directional velocities, accelerations, and attitudes, we developed a Luenberger's reduced order observer to estimate the center of gravity and the buoyancy weight. By simulations using Matlab/Simulink, the efficiency of the proposed observer is shown, where a LQR controller using full state variables is adopted as a depth controller.