• Proceedings of the KAIS Fall Conference
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• 2001.11a
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• pp.163-165
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• 2001

본 연구개발은 입력된 항로를 스스로 비행하며 사진 촬영, 국토 및 환경을 감시ㆍ관리할 수 있는 지능형 무인 비행 시스템 개발을 위한 레저 산업용 무선 조종 모형 비행기에 관련된 핵심기술을 확보하고, 상업화를 위한 전 단계의 시작품을 제작하는 것이다. 이와 관련하여 무선 조종 비행 관련 데이터를 확보 및 습득하고, 이의 활용으로 표준조종 기술을 확립하도록 했다. 또한, 자동 비행모드로 전환하기 위한 자동 비행 제어 알고리즘을 개발했으며, 확보된 비행기술을 데이터화하여 다양한 환경에서 시뮬레이션(simulation)을 수행한 정보를 프로그램화하여 자동 비행을 하도록 하고, 마이크로프로세서(microprocessor)를 이용하여 서보모터를 구동할 수 있는 제어기를 개발하였다.

• Journal of Korean Electronics
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• v.4 no.9
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• pp.71-73
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• 1984

• Journal of Biosystems Engineering
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• v.20 no.3
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• pp.226-235
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• 1995

An unmanned speed sprayer was developed using a remote control and an inductive cable guidance systems to protect operators and environment from hazardous pesticides. The sprayer consists of a remote control system, an induction system, obstacle detectors, control actuators and an one-chip microcomputer. The sprayer can be operated by the induction guidance and/or remote control. The following summarize characteristics of the developed speed sprayer. 1) Both the remote control and the induction guidance operation were possible with the developed speed sprayer. 2) Sixteen functions of the forwarding, backing, halting, steering, 3-way valve for nozzles and fan operating etc. were utilized on the remote control system. 3) It was concluded that the DTMF method, having less transmitting error, performed better than the FSK method for an agricultural remote controller. A radio station may be necessary. 4) The digital inductive guidance system, consisting of five low-impedance detection coils and a window comparator circuit, performed better than the analog detecting system, guiding route using inductive voltage differential from tow detection coils.

• Journal of Korean Society for Geospatial Information Science
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• v.1 no.2 s.2
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• pp.177-184
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• 1993

To obtain large scale precise geographical information in local area we determined external orientation parameters of camn exactly and conducted aerial photography using remote control airship loaded 35mm non-metric camera that produced systematic error coefficients. Ground control Points were determined by differential GPS. Therefore we can try to improve accuracy and economical efficiency. Also, it is suggested that remote control airship photogrammetry can be applied to make large scale topographic map using analytical plotter as calibrated accuracy.

• Proceedings of the KIEE Conference
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• 2005.05a
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• pp.246-248
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• 2005

The power plants have a loading dock and unloading device for the diverse kinds of fuel such as the bituminous coal and natural gas imported by the sea from all over the world. To unload the coal in the ship not only in the environment-friendly manner but also in the cost-effective way, the new type of heavy equipment loaded with additional features as well as excavator and the remote controller to maneuver this equipment are developed. This heavy equipment, which can be used to unload the coal in the ship in conjunction with CSU (Continuous Ship Unloader), and the remote controller are endorsed by the related code and laws. With the remote controller, the field workers can operate the unloading equipment at the remote place far from the equipment as well as in the cabin for themselves without tile remote controller.

• TTA Journal
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• s.166
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• pp.72-73
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• 2016

지금은 드론(drone) 시대다. 무선전파로 유도해 비행과 조종이 가능한 무인 비행체 드론은 원래 '낮게 웅웅거림'을 뜻하는 말이다. 벌이 날아다니며 '웅웅'거리는 소리에 칙안에 붙여진 이름. 처음엔 군사용으로 탄생했지만, 이제는 고공영상 사진촬영과 배달, 기상정보 수집, 농약 살포 등 다양한 분야에서 활용되고 있다. 단 하나의 흠이라면 비행 중 휴식을 취할 수 없다는 것. 춤추듯 날아다니는 연약한 나비도 힘들면 식물의 잎에 앉아 쉬고, 여름철 왕성하게 활동하는 모기도 벽에 붙어 쉬면서 먹잇감 공격을 엿보는데, 드론은 공중에 잠시 멈출 때에도 날갯짓을 계속해야 한다. 이러한 드론의 휴식을 위해 과학자들이 다양한 '쉬어가기' 기술을 내놓고 있다.

• Electronics and Telecommunications Trends
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• v.32 no.1
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• pp.82-92
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• 2017

최근 들어 무인기와 무선통신기술의 비약적인 발전은 무인기들을 국가 공역에 진입시켜 운행할 필요성과 택배, 긴급 통신영역 확장, 재해 감시 및 대처, 위험지역 정찰, 항공촬영과 같은 다양한 분야로의 활용에 대한 요구를 크게 증가시켰다. 다수의 무인기를 안전하게 운행 및 조종하기 위해서는 고신뢰성 및 고보안성을 제공하는 무인기 제어 전용 네트워크가 요구되며, 이러한 네트워크를 무인기 제어용 통합 네트워크라고 한다. 본고는 무인기 제어용 통합 네트워크의 보안 적용 구간을 분류하고, 구간별로 보안 요구사항과 요구사항을 달성할 수 있는 보안기술들을 차례로 제시한다. 또한, 향후에 무인기 제어용 통합 네트워크의 보안성을 강화하기 위해 개선되어야 하는 부분들을 제시한다.

• Korean Journal of Optics and Photonics
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• v.30 no.6
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• pp.230-236
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• 2019

We propose and demonstrate a searching and autoalignment method for indoor optical wireless communication, using a cost-effective retroreflective sheet and a microelectromechanical system (MEMS) mirror. We use an extremum-seeking method for a single axis and beam steering with a MEMS mirror to maintain a line of sight (LOS) with the optical link. This autoalignment method shows a receiver sensitivity of -31.87 dBm for a bit rate of 2.5 Gb/s over a 7 m communication link.

• Journal of Drive and Control
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• v.17 no.4
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• pp.103-112
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• 2020

Field robots are used in various fields, such as agriculture, forestry, manufacturing, and construction; their use has recently expanded to include submarine areas. Field robots can aid in various tasks, such as soil transport, ground clearance, and dismantling of buildings. As field robots are used in a variety of different areas, the difficulty of the work is also quite varied. Increased difficulty is associated with an increased risk of accidents involving the field robot. In order to reduce the accident rate of field robot workers, the need for digitalization and automation of field robots is becoming more of an issue. To this end, it is necessary to study a system that enables workers to do their work without directly contacting a field robot. Therefore, in this paper, we introduce a control system for wireless remote control of a small field robot. The field robot can be wirelessly controlled by a worker in a remote location if the worker cannot be present at the work site. The implemented remote system is tested according to the type of work, and the operating characteristics of the remote system are assessed.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2016.10a
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• pp.537-539
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• 2016

Recently, unmanned technologies interest increased. An unmanned boat is not directly on people and radio can be controlled by boat. Used for military unmanned boat was first developed in the United States Navy. In recent years, for hobby, for pesticide application, for water activities, expanding exploration in various ways, including for use. The role of a variety of unmanned boat above, In the case of a variety of unmanned probe of the role of unmanned boat on the boat people who don't be able to come to the vision of the advantage can not be exploring places like blind spot. In this paper, The Blind Spot are explorations of places such as streaming real-time as possible, an unmanned boat using Raspberry Pi that support implementation. Receiver input signals of an unmanned boat to the transmitter under the manipulation of, using smartphones hotspot feature Raspberry Pi and smartphones, network connection. Via Raspberry Pi motion of using real-time streaming using unmanned boat.