• 대한전기학회:학술대회논문집
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• 대한전기학회 2006년도 제37회 하계학술대회 논문집 D
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• pp.1983-1986
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• 2006

In this paper, we construct the infrastructure for the teleoperating system of mobile robots. For the stable teleoperating system, we develope an algorithm that measure communication time delay on real-time. We propose the force-reflected teleoperation method that control the stiffness of joystick according to VFH(Vector Field Histogram). Also, an obstacle avoidance method using VFH is presented for the mobile robot to move to the indicated direction without collision. Experiments are conducted to demonstrate the feasibility of the proposed methods.

• 로봇학회논문지
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• 제2권2호
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• pp.161-167
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• 2007

It is dangerous that an inspector overhauls defects and condition of the inner parts of an oil tanker because of many harmful gases, complex structures, and etc. However, these inspections are necessary to many oil tankers over old years. In this study, we proposed the design of mobile robot for inspection of CAS in oil tanker. The developed CAS inspection mobile robot has four modules, a measurement module of oil tanker's thickness, a corrosion inspection module, a climbing module of the surface on a wall, and a monitoring module. In order to get over at a check position, the driving control algorithm was developed. Magnetic wheels are used to move on the surface of a wall. This study constructed a communication network and the monitoring program to operate the developed mobile robot from remote sites. In order to evaluate the inspection ability, the experiments about performance of CAS inspection using the developed mobile robot have been carried out.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2002년도 추계학술대회 논문집 전기기기 및 에너지변환시스템부문
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• pp.144-146
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• 2002

The latest development flow of MCCB(Molded Case Circuit Breaker) is largely separated from which are high capability of interrupting compact of size and multi-ability in functions. As follow of development of industrial system. MCCB which are including communication function and having a ultimate interrupting capability is required in electrical system. to attain an effective limitation of the peak let-through current and the let-through energy, the arc has to move rapidly off the contacts and has to increase the arc voltage which mainly effect to interrupt. In this paper. we made high performance circuit breaker which including current limiting unit which is attached to the main which is simulated by CAE tool that are repulsion force and mechanical dynamics after that we tested and finally selected optimized for circuit breaker.

• Journal of information and communication convergence engineering
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• 제3권1호
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• pp.33-37
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• 2005

One of the most important feature of the Mobile Manipulator is redundant freedom. Using the redundant freedom, Mobile Manipulator can move various mode, perform dexterous motion. In this paper, to improve robot job ability, as two robots perform a job in co-operation control, we studied optimal position and posture of Mobile Manipulator with minimum movement of each robot joint. Kinematics of mobile robot and task robot is solved. Using mobility of Mobile robot, weight vector of robots is determined. Using Gradient methode, global motion trajectory is minimized. so the job which Mobile Manipulator perform is optimized. The proposed algorithm is verified with PURL-II which is Mobile Manipulator combined Mobile robot and task robot. and discussed the result.

• 대한의용생체공학회:의공학회지
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• 제31권1호
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• pp.1-13
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• 2010

There are a great numbers of disabled individuals who cannot freely move or control specific parts of their body because of serious neurological diseases such as spinal cord injury, amyotrophic lateral sclerosis, brainstem stroke, and so on. Brain-computer interfaces (BCIs) can help them to drive and control external devices using only their brain activity, without the need for physical body movements. Over the past 30 years, several Bel research programs have arisen and tried to develop new communication and control technology for those who are completely paralyzed. Thanks to the rapid development of computer science and neuroimaging technology, new understandings of brain functions, and most importantly many researchers' efforts, Bel is now becoming 'practical' to some extent. The present review article summarizes the current state of electroencephalogram (EEG)-based Bel, which have been being studied most widely, with specific emphasis on its basic concepts, system developments, and prospects for the future.

• 한국철도학회:학술대회논문집
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• 한국철도학회 2009년도 춘계학술대회 논문집
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• pp.2017-2022
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• 2009

Sinbundang Line(SBL) Train moves the transition zone where is located between Jeongja station and Migeum station switched over from Communication Based Train Control (CBTC) system area to Automatic Train Control (ATC) system area and viceversa. The SBL train to move the between SBL and Bundang Line is needed to install the Specific Transmission Module (STM) on SBL Line for interface with Bundang Line; STM receives from speed code from Bundang Line. So we suggested the method to ensure mutual compatibility and reliability for train operation on each other signaling system.

• 한국정보시스템학회지:정보시스템연구
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• 제17권1호
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• pp.155-171
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• 2008

This thesis proposed a method that connecting step motor to image send board which can acquire image to move and remote controlling via streaming image board of PDA(personal digital assistant) based on embedded Linux which is using wireless network There are three embedded Linux system to embody movable image send board. First, though the wireless network a signal of PDA is transmitted to the board which has embedded Linux and a system which is controlled by the expansion I/O port of the board. Second, it's a system streaming realtime image at a PDA which has embedded Linux. The last is a system which controls a process of image board using TCP/IP communication and image send board at PC. These are the system which can use industrial settings and homes. It can also make use of an embodiment method about travelling image robot.

• 정보처리학회논문지D
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• 제11D권1호
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• pp.203-210
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• 2004

지리정보시스템에 대한 연구는 개방형 구조, 상호운영성과 확장 가능성에 초점을 두고 발전되어 왔다. 이 연구들은 기존에 구축된 하나의 통합시스템의 형태에서 대용량의 데이터, 고차원 구조의 데이터 그리고, 서로 다른 지리 포멧의 데이터를 처리하기 위하여, 응용 프로그램과 사용자 인터페이스를 레이어 별로 구분하여 각기 관리하는 개방형 구조로 시스템이 구현되어야 함을 의미한다. 현재 구현되는 개방형 지리정보시스템을 위한 미들웨어들 중 CORBA 미들웨어는 특정 운영체제를 기반으로 하지 않아 많은 개발자들이 이용하고 있다. 이때, CORBA의 서비스는 점대점 통신만을 지원하고, 다른 미들웨어보다 데이터 제공 시간이 많이 소요되는 문제점을 가지고 있다. 따라서 이 논문에서는 점대점 통신기법의 수정 방법을 제안하고, 구현한다. 제시된 방법은 클라이언트가 서버의 데이터를 한번의 연결로 데이터를 제공함으로써 그룹 통신과 빠른 데이터 제공 속도를 보장할 수 있게 한다.

• 한국정보전자통신기술학회논문지
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• 제2권3호
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• pp.61-69
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• 2009

본 논문에서는 새로운 실시간 시선 추적 방식을 제안하고자한다. 기존의 시선추적 방식은 사용자가 머리를 조금만 움직여도 잘못된 결과를 얻을 수가 있었고 각각의 사용자에 대하여 교정 과정을 수행할 필요가 있었다. 제안된 시선 추적 방법은 적외선 조명과 Generalized Regression Neural Networks(GRNN)를 이용함으로써 교정 과정 없이 머리의 움직임이 큰 경우에도 견실하고 정확한 시선 추적을 가능하도록 하였고 매핑 기능을 일반화함으로써 각각의 교정과정을 생략 할 수 있게 하여 학습에 참여하지 않은 다른 사용자도 시선 추적을 가능케 하였다. 실험결과 얼굴의 움직임이 있는 경우에는 평균 90%, 다른 사용자에 대해서는 평균 85%의 시선 추적 결과를 나타내었다.

• 한국전자통신학회논문지
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• 제13권5호
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• pp.1085-1092
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• 2018

최근에 의료, 군사, 스포츠 등의 다양한 분야에서 사물인터넷(IoT)와 빅데이터가 활용되고 있다. 나사렛대학교는 여러 형태의 장애 등급과 장애 유형을 가지고 있는 약 300여명의 장애학생이 있는 재활복지 중심대학이다. 본 논문은 캠퍼스 내에서 장애 학생들이 실내와 실외를 이동할 시에 BLE비콘과 3축 가속도 센서를 이용하여 이동경로 산정과 위험상황 회피를 위한 최적의 경로를 제공하는 스마트 캠퍼스를 제안한다. 이를 위하여 센서기반 IoT 기술을 이용한 장애학생 보행 데이터를 빅데이터로 관리한다.