• Title/Summary/Keyword: drone system

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A Real Time Quadrotor Autonomous Navigation and Remote Control Method (실시간 쿼드로터 자율주행과 원격제어 기법)

  • Son, Byung-Rak;Kang, Seok-Min;Lee, Hyun;Lee, Dong-Ha
    • IEMEK Journal of Embedded Systems and Applications
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    • v.8 no.4
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    • pp.205-212
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    • 2013
  • In recent, the demand of Unmanned Aerial Vehicles (UAVs) that can autonomous navigation and remote control has been increased in military, civil and commercial field. Particularly, existing researches focused on autonomous navigation method based on vanish point and remote control method based on event processing in indoor environments. However, the existing methods have some problems. For instance, a detected vanish point in intersection point has too much detection errors. In addition, the delay is increased in existing remote control system for processing images in real time. Thus, we propose improved vanish point algorithm by removing detection errors in intersection point. We also develop a remote control system with android platform by separating flying control and image process. Finally, we compare the proposed methods with existing methods to show the improvement of our approaches.

Study on the current direction of our country in accordance with the basic conditions for the commercialization of the UAV

  • Jo, Jong Deok;Lee, Chang Hee
    • International Journal of Internet, Broadcasting and Communication
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    • v.8 no.4
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    • pp.58-62
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    • 2016
  • Shipping related services is attracting attention as a UAV (Unmanned Aerial Vehicle) application with the recent economy has been generally accepted drones. UAV of the existing military-driven logistics delivery, aerial photography, wireless Internet connection, broadcasting, disaster research, digital maps, transportation, advertising, meteorological, border surveillance, agricultural use, such as hobbies range of uses from up military are diverse and growing. The advantage of delivery drones seems to be an important feature of delivery of the goods, including labor-saving, long-distance transportation in cold weather. UAV is demanded by competitive performance development for commercialization. Privacy issues that may arise during the drone operation, ensuring marketability issues, control system, regulations, operational standards and specifications, etc. should be addressed. Development direction of Korea UAV based in current technology, regulation, and growth potential presented by deriving from the idea of 'GIF 2016 Gang-won Hackathon.

Tests of Characteristics of Wind Sensors for Multicopter Drone Uses (멀티콥터 드론 적용을 위한 바람 센서의 특성 실험)

  • Jin, Jaehyun
    • Journal of Aerospace System Engineering
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    • v.15 no.3
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    • pp.99-104
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    • 2021
  • The characteristics of wind sensors were experimentally analyzed and compared for purposes of application in multicopter type drones. For rotating wind sensors, the dynamics effect causes measurement errors, while manufacturing errors and signal processing errors were found to constitute significant errors in ultrasonic sensors. In the ultrasonic sensor, the errors decrease as the distance of the transducer increases. These characteristics were experimentally confirmed, and it was established that ultrasonic sensors capable of outputting voltage or data of 10 Hz or more are suitable for use in multicopters.

Recent R&D Trends of Mobile FSO Technologies (모바일 자유공간 광전송(FSO) 기술 동향)

  • Yeo, C.I.;Heo, Y.S.;Ryu, J.H.;Lee, M.S.;Kang, H.S.;Park, S.W.;Kim, K.E.;Kim, S.C.
    • Electronics and Telecommunications Trends
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    • v.33 no.6
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    • pp.118-128
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    • 2018
  • With the massive increase in bandwidth for wireless communications, free space optical (FSO) communication has attracted significant interest owing to its outstanding strengths over conventional radio frequency wireless communication such as a wide bandwidth, unlicensed spectrum, low power consumption, small size, electromagnetic interference immunity, long-range propagation, and improved security. In recent years, FSO technology has been studied intensively for use in terrestrial and underwater autonomous and unmanned mobile systems, a rapidly growing application area, including robots, drones, unmanned aerial vehicles, autonomous vehicles, unmanned trains, and unmanned submarines. In this report, we review the recent trends and key technologies for the mobile FSO system, and introduce our drone-based mobile FSO system, which is currently under development.

A Study of UWB Placement Optimization Based on Genetic Algorithm

  • Jung, Doyeon;Kim, Euiho
    • Journal of Positioning, Navigation, and Timing
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    • v.11 no.2
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    • pp.99-107
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    • 2022
  • Urban Air Mobility (UAM) such as a drone taxi is one of the future transportations that have recently been attracting attention. Along with the construction of an urban terminal, an accurate landing system for UAM is also essential. However, in urban environments, reliable Global Navigation Satellite Systems (GNSS) signals cannot be received due to obstacles such as high-rise buildings which causes multipath and non-line of sight signal. Thus, the positioning result in urban environments from the GNSS signal is unreliable. Consequently, we propose the Ultra-Wideband (UWB) network to assist the soft landing of UAM on a vertiport. Since the positioning performance of UWB network depends on the layout of UWB anchors, it is necessary to optimize the layout of UWB anchors. In this paper, we propose a two-steps genetic algorithm that consists of binary genetic algorithm involved multi objectives fitness function and integer genetic algorithm involved robust solution searching fitness function in order to optimize taking into account Fresnel hole effects.

A Literature Review of Unmanned Aircraft System (UAS) Integrated Constructed Facility Condition Inspections (무인항공체계 기반 시설물 상태점검 최근 연구동향 분석)

  • Kwon, Jin-Hyeok;Yun, Jiyeong;Youn, JongYoung;Lee, Donghoon;Kim, Sungjin
    • Proceedings of the Korean Institute of Building Construction Conference
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    • 2021.05a
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    • pp.172-173
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    • 2021
  • In recent, unmanned Aircraft Systems (UAS) have been widely used for various purposes, such as safety inspection, facility condition inspection, progress monitoring, in the architecture engineering, and construction (AEC) industry. This technology can provide visual assets regarding the conditions of construction jobsites as well as constructed facilities during flying over the point of interests. With the significant interests in this advancement, the recent studies have presented how the UAS can be applied fro different types of facilities (e.g., buildings, power genereation systems, roads, or bridges) to inspect the current conditions of them for safe operations as well as public's safety. This study reviewed the receent studies to document their scientific findings and practical contributions, as well as provided the overview of further implications for future studies.

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Histogram Learning-based Solar Power Plant Failure Reading System (히스토그램 학습 기반 태양광발전소 고장 판독 시스템)

  • Youm, SungKwan;Shin, Kwang-Seong
    • Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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    • 2021.10a
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    • pp.572-573
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    • 2021
  • By optimizing the development of IoT-type thermal image-based photovoltaic fault detection equipment and interworking with drones using a drone with an intelligent path movement function, real-time analysis of the acquired image data facilitates fault reading of solar power plants. , design a system that can read out the failure of a solar panel using the image subtraction analysis technique and the presentation of the basic technology that can improve the power generation rate of the solar power plant and make an efficient maintenance model.

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A Consideration of Accuracy Correction Methods in RTLS for Indoor Facility Management with Drones

  • Yeo, ChangJae;yu, Jungho
    • International conference on construction engineering and project management
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    • 2017.10a
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    • pp.210-213
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    • 2017
  • The construction industry has witnessed an exponential growth of drones used in the field over the past few years. Likewise, the field of maintenance has paid increasing attention to using drones with a view to improving the efficiency of condition checks in high-rise buildings and major space. Although operators manipulate drones to inspect buildings at present, drones are expected to autonomously move around without operators in a few years. Also, for indoor maintenance, it is important for drones to find accurate locations, which is implemented by real-time locating systems(RTLS). Yet, the accuracy of RTLS varies across the types of systems and indoor settings, which warrants a locating system suitable for indoor space and a location correction system designed to improve the accuracy. Hence, the current study investigated the accuracy of real-time locating systems(RTLS) for the maintenance of indoor space of buildings with drones and delved into the methods of correcting the location information to improve the accuracy of RTLS.

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Ultrawideband coupled relative positioning algorithm applicable to flight controller for multidrone collaboration

  • Jeonggi Yang;Soojeon Lee
    • ETRI Journal
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    • v.45 no.5
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    • pp.758-767
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    • 2023
  • In this study, we introduce a loosely coupled relative position estimation method that utilizes a decentralized ultrawideband (UWB), Global Navigation Support System and inertial navigation system for flight controllers (FCs). Key obstacles to multidrone collaboration include relative position errors and the absence of communication devices. To address this, we provide an extended Kalman filter-based algorithm and module that correct distance errors by fusing UWB data acquired through random communications. Via simulations, we confirm the feasibility of the algorithm and verify its distance error correction performance according to the amount of communications. Real-world tests confirm the algorithm's effectiveness on FCs and the potential for multidrone collaboration in real environments. This method can be used to correct relative multidrone positions during collaborative transportation and simultaneous localization and mapping applications.

Smart Integrated Monitoring System for Ensuring Indenpendent Network in Disaster Site (재난현장의 독립적 통신망 확보를 위한 스마트 통합 관제시스템)

  • Lee, Yang Sun
    • Journal of Digital Contents Society
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    • v.18 no.5
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    • pp.905-910
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    • 2017
  • In this paper, we were proposed an on-site smart integrated monitoring system for securing an independent network infrastructure (wireless communication, image transmission and site situation detection) in disaster area. The proposed system was designed not only for the entire structure of the disaster safety communication network but also for the effective exchange of information between the field crew team and the field command and control center at the disaster site. Also, the proposed Smart Integrated Monitoring System supports wireless communication between field crews at the disaster site and supports communication with the drone to collect disaster scene video information. Therefore, the on-site smart integrated monitoring system enables to obtain the complete image of the surrounding area in case of a disaster and to efficiently command the field crew.