• Proceedings of the KIEE Conference
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• 2007.07a
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• pp.343-344
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• 2007

소화기관의 질병 진단 및 질료의 목적으로 사용되어지는 기존의 일반적인 내시경은 의사의 숙련도를 요하고 환자에게 고통 및 공포감을 수반한다. 이러한 문제점을 해결하기 위하여 캡슐형 내시경이 사용되고 있지만 소화기관의 연동운동에 의존한 내시경의 이동으로 인하여 시술 시간이 길고 지나온 기관에 대한 재검사가 불가능 하다는 단점을 가지고 있다. 이에 대한 대안으로 체내 능동구동이 가능한 캡슐형 내시경의 개발이 활발히 진행되어지고 있다. 본 논문은 소형 직류 전동기를 이용한 체내 능동 구동 메커니즘을 제안하고 캡슐 내시경 로봇을 무선 구동하기 위한 직류 전동기 구동 장치 및 무선 데이터 송수신 모듈, 집적된 시스템의 배터리 구동 기술을 제안한다. 개발된 마이크로 로봇은 In-vitro 실험을 통하여 체내 능동 구동가능성을 검증 하였다.

• The Journal of Korean Institute of Electromagnetic Engineering and Science
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• v.14 no.1
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• pp.62-67
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• 2003

This paper is concerned with the design of the beam forming module that is a key unit of the active phased array antenna(APAA) system for mobile satellite communications. This module includes two blocks for main signal and tracking signal. Main signal block has the role of transmitting input signal from phased array antenna to tracking signal block. And, tracking signal block executes main roles, beam forming of tracking signal and electronic beam control. The several electrical performances of this module, phase characteristics and linear gain, etc., agreed with specifications needed fur APAA, and for more clear verification of the performances, the satellite communication test of the APAA including the modules was accomplished in the outdoors.

• Journal of Convergence for Information Technology
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• v.7 no.5
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• pp.95-102
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• 2017

Modular toys for creative education require functional blocks to create various types of movements. An active drive module and a lot of passive connection blocks are needed to express motion with combination. In this paper, we propose the design of modular toys to produce various creative movements and controller structure working with them. In order to facilitate the connection between the designed modules, a connection method and a suitable mechanism are suggested. We also dealt with the design of various types of sensor modules that can work in conjunction with modular toys. Using these toys, typical standard application form that can be imitated educationally is suggested and showed the usefulness of the modular toy by actually applying it with designed modules and components. The proposed method is applied to actual educational toys, and the operation is effectively performed by recording operation and playing repetitive operation.

• Proceedings of the Korean Society for Noise and Vibration Engineering Conference
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• 2008.11a
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• pp.243-244
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• 2008

• Proceedings of the Korean Society for Noise and Vibration Engineering Conference
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• 2010.05a
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• pp.500-501
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• 2010

• Proceedings of the Korean Society of Precision Engineering Conference
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• 2004.05a
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• pp.183-183
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• 2004

기능적/공간적 통합 원리를 이용하여 기존 Multi-coordinate 드라이브 모듈들을 통합 구현하려는 시도들이 보고되고 있다. 본 논문에서는 선형 유도 구동기에서 에지 효과를 줄이기 위해 개발된, 이동 자장의 방향과 폐자로의 방향이 수직인 횡자속 선형 유도 구동기(TFLIM)를 대상으로 이러한 통합 원리를 이용하여 구동기에 인가되는 3상 입력을 조절하여 공극의 자기 상호 작용에 기인하여 부수적으로 발생되는 흡인력/부상력을 능동적으로 이용할 수 있는 방법을 제안한다.(중략)

• Proceedings of the KIEE Conference
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• 2001.07d
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• pp.2442-2445
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• 2001

현재까지의 자율 주행 로봇에 대한 연구는 완전히 지능화된 로봇으로 작업을 수행하는 연구가 대부분이었다. 자율 주행 로봇이 완전한 지능을 지니기 위해서는 고비용, 고성능의 센서가 필요하다. 본 논문은 지능화 공간의 개념을 사용하여 네트워크 기반의 자율 주행 로봇을 구동하기 위한 능동적인 시스템 구조를 제안하며 고성능의 센서가 없어도 효과적인 주행을 함을 보인다. 본 논문에서 제안하는 시스템 구조에서 네트워크상의 여러 가지 자원들(로봇, 비전 시스템, 디스플레이시스템)은 서비스가 되어 서로의 기능을 능동적으로 사용할 수 있다. 네트워크상에서 각 서비스를 공유하기 위하여 JAVA기반의 프로토콜 Jini를 사용하였다. 본 논문에서 제안한 자율 주행 로봇은 주변 환경 및 주어진 작업에 따라 기능적으로 모듈화된 서비스를 환경상의 여러 자원들과 공유하여 운용된다.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.9 no.2
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• pp.327-332
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• 2008

New RF matcher module has been proposed in this paper for improvement of RF matcher in plasma etcher system using in semiconductor and display panel manufacturing process. New designed warm gear was used instead of bevel gear in new driving module, and control system was re-arranged with one-chip micro-process technique. The matching performance of new match module was improved in various process condition with reduction of backlash and matching time, and flexible motion of motor compared commercial match module. However this new type RF match module will improve the productivity in etching process of the mass production line.

• Journal of the Korean Society for Aeronautical & Space Sciences
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• v.46 no.1
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• pp.10-17
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• 2018

The size of commercial wind turbines has been increased. Generally, the pitch control is used to increase the efficiency of wind turbine. However, the pitch control has difficulty to control the local unsteady flow control which makes fatigue load and decreases the efficiency. In this research, Synthetic Jet Actuators(SJAs) are manufactured and applied into a wing section to delay flow separation and increase aerodynamic performances. The SJAs as a kind of zero-net mass-flux actuators injects and removes fluid through a small orifice with a given frequency. The SJA modules actuated by piezoelectric disks are manufactured and the aerodynamic performances are measured according to the shape of the orifice and the velocity of the jets through the wind tunnel test. It is confirmed that as the velocity of the jets are increased using rectangular shape orifice, drag force is decreased and lift force in increased.

• Journal of the Korea Society of Computer and Information
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• v.16 no.9
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• pp.131-143
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• 2011

Previous alerting service based on LBS was caused severe overload problem of server by using the method to confirm the location of each moving object on server. In this paper, by loading an App on smart moving object, we proposed a novel algorithm named ADAS(Active Disaster Alert Service) for accessing to the server site with oneself location information as needed and implemented the disaster alerting service system with visualization for user. In the proposed method, running App access to the server periodically with the present location coordinate gained from GPS module or network module and the ID of moving object. Then, the server compare the present location coordinate of moving object and the coordinates of disasters registered in DIDB and transmit the n NDIs existed in near distance orderly from the coordinate of present moving object to the client. The App compares the coordinate of present location for moving object and the coordinates of NDI is transmitted from server by real time and executes the service with classifying levels of alert into three steps such as danger, carefulness and safety. And new NDIs are gained by accessing DIDB on Server periodically during running App. Therefore, this will be become a novel method for reducing fundamentally the server overload problem in comparison with previous alerting service that the career of moving object is managed on server.