• Title/Summary/Keyword: Sensor orientation

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Digital Image Stabilization of Robot Buoy Using the Image of Mechanism (기구 메커니즘의 영상 정보를 이용한 부표 로봇의 영상 안정화)

  • Im, Eun;Myeong, Ho-Jun;Kim, Young-Jin;Yim, Choong-Hyuk;Kim, Dong-Hwan
    • Transactions of the Korean Society of Mechanical Engineers A
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    • v.36 no.6
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    • pp.645-651
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    • 2012
  • In this paper, we propose a new method for stabilizing the image captured from a camera mounted on a buoy robot. In this study, in order to solve the problem of cumulative errors and noise produced by a general gyro sensor measuring the orientation angle of the buoy robot, we propose new method for stabilizing the image. In this method, image processing techniques are combined with a newly designed target mounting mechanism that adapts to wave fluctuations. New target extraction and angle estimation techniques are introduced, along with the new mounting mechanism used for the camera and the target, which produce a stabilized image even if the buoy robot is on fluctuating waves.

Effect of the hetero-epitaxial ZnO buffer layer for the formation of As-doped ZnO thin films (Hetero-epitaxial ZnO 버퍼층이 As-doped ZnO 박막의 증착조건에 미치는 영향)

  • Lee, Hong-Chan;Choi, Won-Kook;Shim, Kwang-Bo;Oh, Young-Jei
    • Journal of Sensor Science and Technology
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    • v.15 no.3
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    • pp.216-221
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    • 2006
  • ZnO thin films prepared by PLD method exhibit an excellent optical property, but may have some problems such as incomplete surface roughness and crystallinity. In this study, undoped ZnO buffer layers were deposited on (0001) sapphire substrates by ultra high vacuum pulse laser deposition (UHV-PLD) and molecular beam epitaxy (MBE) methods, respectively. After post annealing of ZnO buffer layer, undoped ZnO thin films were deposited under different oxygen pressure ($35{\sim}350$ mtorr) conditions. The Arsenic-doped (1, 3 wt%) ZnO thin layers were deposited on the buffer layer of undoped ZnO by UHV-PLD method. The optical property of the ZnO thin films was analyzed by photoluminescence (PL) measurement. The ${\theta}-2{\theta}$ XRD analysis exhibited a strong (002)-peak, which indicates c-axis preferred orientation. Field emission-scanning electron microscope (FE-SEM) revealed that microstructures of the ZnO thin films were varied by oxygen partial pressure, Arsenic doping concentration, and deposition method of the undoped ZnO buffer layer. The denser and smoother films were obtained when employing MBE-buffer layer under lower oxygen partial pressure. It was also found that higher Arsenic concentration gave the enhanced growing of columnar structure of the ZnO thin films.

Preparation of $NbS_2$ thin film using PLD method (PLD 장치를 이용한 $NbS_2$ 박막의 제작)

  • Park, Jong-Man;Lee, Hea-Yeon;Jeong, Jung-Hyun
    • Journal of Sensor Science and Technology
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    • v.7 no.5
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    • pp.372-376
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    • 1998
  • We developed a pulsed laser deposition(PLD) apparatus for depositing various thin films. In this study, the formation of $NbS_2$ thin film was performed in the vacuum chamber by PLD method. $Al_2O_3$(012) and Si(111) were used as the substrates. In order to investigate the growth conditions of a high crystalline $NbS_2$ thin film, the S/Nb composition ratio was varied from 2.0 to 5.25 and the substrate temperature was varied from the room temperature to $600^{\circ}C$. From the result of X-ray diffraction studies of the prepared $NbS_2$ thin films, it was reported that the $NbS_2$, thin film showed a good crystallinity at substrate temperature $600^{\circ}C$ and with S/Nb composition ratio 4.0 on $Al_2O_3$(012) but did not on Si(111). The films exhibited c-axis orientation.

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A Development of Home Mess-Cleanup Robot

  • Cha, Hyun-Koo;Jang, Kyung-Jun;Im, Chan-Young;Kim, Seung-Woo
    • 제어로봇시스템학회:학술대회논문집
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    • 2005.06a
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    • pp.1612-1616
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    • 2005
  • In this paper, a Home Mess-Cleanup Robot(HMR), which has a practical function of the automatic mess-cleanup, is developed. The vacuum-cleaner had made the burden of house chore lighten but the operation labour of a vacuum-cleaner had been so severe. Recently, the cleaning robot was producted to perfectly solve the cleaning labour of a house but it also was not successful because it still had a problem of mess-cleaning, which was the clean-up of big trash and the arrangement of newspapers, clothes, etc. The cleaning robot is to just vacuum dust and small trash but has no function to arrange and take away before the automatic vacuum-cleaning. For this reason, the market for the cleaning robot is not yet built up. So, we need a design method and technological algorithm of new automatic machine to solve the problem of mess-cleanup in house. It needs functions of agile automatic navigation, novel manipulation system for mess-cleanup. The automatic navigation system has to be controlled for the full scanning of living room, to recognize the absolute position and orientation of the self, the precise tracking of the desired path, and to distinguish the mess object to clean-up from obstacle object to just avoid. The manipulator, which is not needed in the vacuum-cleaning robot, must have the functions, how to distinguish big trash to clean from mess objects to arrange, how to grasp in according to the form of mess objects, how to move to the destination in according to mess objects and arrange them. We use the RFID system to solve the problems in this paper and propose the reading algorithm of RFID tags installed in indoor objects and environments. Then, it should be an intelligent system so that the mess cleaning task can be autonomously performed in a wide variety of situations and environments. It needs to also has the entertainment functions for the good communication between the human and HMR. Finally, the good performance of the designed HMR is confirmed through the results of the mess clean-up and arrangement.

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Smart Phone Picture Recognition Algorithm Using Electronic Maps of Architecture Configuration (건물 배치 전자도면을 이용한 모바일 폰의 피사체 인지 방법)

  • Yim, Jae-Geol;Joo, Jae-Hun;Lee, Gye-Young
    • The Journal of Society for e-Business Studies
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    • v.17 no.3
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    • pp.1-14
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    • 2012
  • As the techniques of electronic and information are advancing, the computing power of a smart phone is becoming more powerful and the storage capacity of a smart phone is becoming larger. As the result, various new useful services are becoming available on smart phones. The context-aware service and mobile augmented reality have recently been the most popular research topics. For those newly developed services, identifying the object in the picture taken by the camera on the phone performs an extremely important role. So, many researches of identifying pictures have been published and most of them are based on the time consuming image recognition techniques. On the contrary, this paper introduces a very fast and effective method of identifying the objects on the photo making use of the sensor data obtained from the smart phone and electronic maps. Our method estimates the line of sight of the camera with the location and orientation information provided by the smart phone. Then it finds any element of the map which intersects the line of sight. By investigating those intersecting elements, our method identifies the objects on the photo.

Position and Attitude Estimation of a Capsule Endoscope based on Ultrasonic Ranging (초음파 거리를 이용한 캡슐 내시경의 위치 및 자세각 추정)

  • Kim, Eun-Joung;Kim, Myung-Yu;Kim, Deok-Ki;Kim, Yong-Dae;You, Young-Gap
    • Journal of the Institute of Electronics Engineers of Korea SC
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    • v.44 no.5
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    • pp.38-44
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    • 2007
  • This paper presented a location and attitude estimation scheme of a capsule endoscope based on ultrasonic ranging. The scheme comprised eight on-capsule ultrasonic sensors to alleviate measurement errors due to irregularities in human body ultrasonic characteristics. It calculated the coordinate values and angles in a Cartesian coordinate system. The Matlab simulation reflecting random errors yielded the average deviations of 0.8mm in the location and $0.2^{\circ}$ in the attitude angle. These values are far smaller than normal intestine movement ranges inside human body, and will contribute accurate diagnosis of intestine.

Evolving Internet Information & Technology as Enablers for Creating Shared Values

  • Song, In Kuk;Chun, Junchul
    • KSII Transactions on Internet and Information Systems (TIIS)
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    • v.9 no.1
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    • pp.309-317
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    • 2015
  • Recently many companies began to realize their visions for the sustainable growth with the advent of CSV(Creating Shared Values). Michael E. Porter, a Harvard Professor, claims that placing social value creation at the core of business strategy has the potential to uncover big opportunities for individual companies and that shared value can play a significant role in increasing competitive advantages while fostering social prosperity. In consequence, the various researches have illustrated how to get the opportunity for competitive advantages from building a social value proposition into corporate strategy, and considerable studies have been promoted heavily from the managerial perspective. However, due to the lack of capability converging information technology with business strategy, any research effort to identify technological or Internet-related issues and to link the issues to CSV does not exist. With Korean being a Internet leading country, the demands of researches analyzing core technology, information, and service utilizing Internet are rapidly growing. The study aims to find out Internet-related enablers for CSV. This paper describes the concepts and features of CSV, identifies emerging Internet-related issues toward the opportunity for competitive advantage, and then depicts the rigorous research endeavors in the areas of Internet information, technology, and services. As a result, 11 papers presented and selected as the outstanding papers at APIC-IST 2014 handle the issues to be brought together, which include: Wireless and Sensor Network, Image Processing and HCI, Big Data and Business Intelligence, Security & Privacy in Internet, SNS & Communication, Smart-Learning and e-Learning, and Internet Business Strategy. The study finally recommends indispensible terms for substantially vitalizing CSV.

A Study on Nondestructive Technique Using Laser Technique for Evaluation of Carbon fiber Reinforced Plastic (레이저를 이용한 탄소섬유강화 복합재료의 비파괴평가 기법에 관한 연구)

  • Choi, Sang-Woo;Lee, Joon-Hyun;Byun, Joon-Hyung;Seo, Kyeong-Cheol
    • Journal of the Korean Society for Nondestructive Testing
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    • v.25 no.2
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    • pp.103-109
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    • 2005
  • Fiber reinforced plastic material should be inspected in fabrication process in order to enhance quality by prevent defects such as delamination and void. Generally, ultrasonic technique is widely used to evaluate FRP. In conventional ultrasonic techniques, transducer should be contacted on FRP. However, conventional contacting method could not be applied in fabrication process and novel non-contact evaluating technique was required. Laser-based ultrasonic technique was tried to evaluate CFRP plate. Laser-based ultrasonic waves propagated on CFRP were received with various transducers such as accelerometer and AE sensor in order to evaluate the properties of waves due to the variation of frequency. Velocities of laser-based ultrasonic waves were evaluated for various fiber orientation. In addition, laser interferometry was used to receive ultrasonic wave in CFRP and frequency was analysed.

Structure and Electrical Properties of PbTe Thin Film According To The Substrate Temperature (기판온도에 따른 PbTe 박막의 구조 및 전기적 물성)

  • Lee, Hea-Yeon;Choi, Byung-Chun;Jeong, Jung-Hyun
    • Journal of Sensor Science and Technology
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    • v.8 no.2
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    • pp.184-188
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    • 1999
  • PbTe thin films of high quality were deposited on HF-treated Si(100) substrates at various substrate temperature by pulsed laser deposition technique. XRD patterns showed that PbTe layers were well-crystallized to a cubic phase with (h00) preferred orientation with the substrate temperature up to $300^{\circ}C$. PbTe films could not form at substrate temperature above $400^{\circ}C$ because of reevaporation of the Pb. According to AFM image, the surface of films was composed of small granular crystals and flat matrix. According to the increase of substrate temperature, the grain size at film surface becomes larger. By Hall-effect measurement, the carrier concentration and Hall mobility of n-type PbTe films grown by $T_{sub}=300^{\circ}C$ were $3.68{\times}10^{18}cm^{-3}$ and $148\;cm^2/Vs$, respectively.

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Characteristics of PLT thin films by rf magnetron sputtering (고주파 마그네트론 스펏터링법으로 제조한 PLT 박막의 특성)

  • Choi, B.J.;Park, J.H.;Kim, Y.J.;Choi, S.Y.;Kim, K.W.
    • Journal of Sensor Science and Technology
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    • v.4 no.3
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    • pp.37-42
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    • 1995
  • The PLT thin films on MgO substrate have been fabricated by RF magnetron sputtering and the dependence of properties on fabrication conditions have been studied. The PbO-rich target was used and the optimum fabrication conditions of the PLT thin films were such that substrate temperature, working pressure, $Ar/O_{2}$ ratio, and rf power was $640^{\circ}C$, 10 mTorr, 10:1, and $1.7\;W/cm^{2}$, repectively. In these conditions, the PLT thin film showed the deposition rate of $62.5\;{\AA}/min$, the Pb/Ti ratio of 1/2, and the dielectric constant of 200. The PLT thin film showed good c-axis orientation and crystalinity according to XRD and SEM analysis.

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