• Title/Summary/Keyword: on-device

Search Result 19,531, Processing Time 0.051 seconds

A Study on Improvement of Industrial Hood in Ventilation System for Elimination of Harmful Material and Dust (유해물질 및 공업용 분진 제거를 위한 산업용 후드 개선에 관한 연구)

  • Kim, Young-Sun;Oh, Yool-Kwon
    • Korean Journal of Air-Conditioning and Refrigeration Engineering
    • /
    • v.20 no.4
    • /
    • pp.238-244
    • /
    • 2008
  • This study investigates on the improvement of inhalation effect of hood which attached new device named as "gas-guide-device" in local exhaust ventilation system for the effective elimination of harmful material and dust in manufacturing factory. The gas-guide-device having a diamond shape is composed of width (b) and two sides of a device (X, Y) and its size is selected the industrial hood under application in manufacturing factory after due consideration. In order to investigate the effect of gas-guide-device, numerical and experimental study is performed that the flow velocity is calculated and is measured by a commercial program "COMSOL $Multiphysics^{TM}$" and a hot wire type of anemometer, respectively. The numerical and experimental results are revealed is a similar pattern and flow velocity has improved to hood attached gas-guide-device. Also, the numerical method and result is also verified the dependance. Moreover, the optimum shape and size of gas-guide-device is revealed that the width (b) and the ratio of two sides of gas-guide-device (X, Y) has 125mm and 4 to 6.

An advertisement method using inaudible sound of speaker

  • Chung, Myoungbeom
    • Journal of the Korea Society of Computer and Information
    • /
    • v.20 no.8
    • /
    • pp.7-13
    • /
    • 2015
  • Recently, there are serviced user customized advertisement of various type using smart device. Representative services are advertisement service using light of smart TV screen or audible sound of smart TV to transmit advertisement information. However, those services have to do a specific action of smart device user for advertisement information or need audible audio information of TV contents. To overcome those weakness, therefore, we propose an advertisement method using inaudible sound of speaker based on smart device. This method supports the transfer of advertising content to the smart device user with no additional action or TV audio signal required to access that content. The proposed method used two high frequencies among 18kHz ~ 22kHz of audible frequency range which smart TV can send out. And it generates those frequencies synthesized with audio of TV contents as trigger signal which can send advertisements to smart device. Next, smart device analysis the trigger signal and request advertisement contents related to the signal to server. After then, smart device can show the downloaded contents to user. Because the proposed method uses the high frequencies of sound signals via the inner speaker of the smart device, its main advantage is that it does not affect the audio signal of TV content. To evaluate the efficacy of the proposed method, we developed an application to implement it and subsequently carried out an advertisement transmission experiment. The success rate of the transmission experiment was approximately 97%. Based on this result, we believe the proposed method will be a useful technique in introducing a customized user advertising service.

A Study on Characteristics of Hybrid Damping Device Combining Rubber Core Pad and Hysteretic Steel Slit (고무코어패드와 강재이력감쇠장치를 결합한 복합감쇠장치의 이력특성에 관한 연구)

  • Park, Byung-Tae;Lee, Joon-Ho
    • Journal of Korean Association for Spatial Structures
    • /
    • v.23 no.1
    • /
    • pp.45-52
    • /
    • 2023
  • This study proposes an RCS composite damping device that can achieve seismic reinforcement of existing buildings by dissipating energy by inelastic deformation. A series of experiments assessing the performances of the rubber core pad, hysteretic steel slit damping device, and hybrid RCS damping device were conducted. The results showed that the ratios of the deviations to the mean values satisfied the domestic damping-device conformity condition for the load at maximum device displacement in each direction, at the maximum force and minimum force at zero displacement, as well as the hysteresis curve area. In addition, three analysis models based on load-displacement characteristics were proposed for application to seismic reinforcement design. In addition, the validity of the three proposed models was confirmed, as they simulated the experimental results well. Meanwhile, as the shear deformation of the rubber-core pad increased, the hysteretic behavior of super-elasticity greatly increased the horizontal force of the damping device. Therefore, limiting the allowable displacement during design is deemed to be necessary.

Design and Control of a Wire-driven Haptic Device;HapticPen

  • Farahani, Hossein S.;Ryu, Je-Ha
    • 제어로봇시스템학회:학술대회논문집
    • /
    • 2005.06a
    • /
    • pp.1662-1667
    • /
    • 2005
  • In this paper, analysis, design, control and prototype construction of a wearable wire-driven haptic interface called HapticPen is discussed. This device can be considered as a wire driven parallel mechanism which three wires are attached to a pen-tip. Wire tensions are provided utilizing three DC servo motors which are attached to a solid frame on the user's body. This device is designed as input as well as output device for a wearable PC. User can write letters or figures on a virtual plate in space. Pen-tip trajectory in space is calculated using motor encoders and force feedback resulting from contact between pen and virtual plate is provided for constraining the pen-tip motion onto the virtual plane that can be easily setup by arbitrary non-collinear three points in space. In this paper kinematic model, workspace analysis, application analysis, control and prototype construction of this device are presented. Preliminary experiments on handwriting in space show feasibility of the proposed device in wearable environments.

  • PDF

A Study on Designing a Proper External Shading Device to Diminish the Cooling Load of a Transparent Glazing Office Building (투명 유리 사무소 건물의 냉방부하 감소를 위한 적정 외부차양 배치에 관한연구)

  • Yim, Sang-Joon;Seo, Hye-Soo;Kim, Byung-Seon
    • KIEAE Journal
    • /
    • v.2 no.4
    • /
    • pp.21-26
    • /
    • 2002
  • Modem architecture represent a great capitalistic, polishing, high-technology image to the public by design. As a result, glass architecture which show 'transmittance' in desinging play a leading part, consequently a role of machine is increasing in controlling an internal environment of building. These movement look like assisting an universal standard building disregarding a each nation's climate peculiarity, if glass building is applied by a proper external shading device. the shading device has a great effect on the reduction of cooling load energy, this research to propose the proper designing scheme of the fixed external shading device. The effect of proper external shading device on the cooling load is evaluated by the numeric simulation.

Real-time Control on LonWorks/IP Virtual Device Network(VDN) for Rail Transit Vehicles (철도차량용 LonWorks/IP 가상 디바이스 네트워크 (VDN)에서의 실시간 분산제어)

  • Choi, Gi-Heung
    • Proceedings of the KSR Conference
    • /
    • 2004.10a
    • /
    • pp.1253-1258
    • /
    • 2004
  • A general idea of implementing and managing real-time control on the VDN for rail transit vehicles is presented. In particular, the virtual device network considered in this paper is composed of Ethernet as the data network and LonWorks network as the device (control) network. A LonWorks/IP web server was used as a gateway to realize peer to peer data communication on the virtual device networks. Experimental results are given to validate the suggested architecture.

  • PDF

Development of an Integrated IoT System for Searching Dependable Device based on User Property (사용자 요소 기반의 신뢰성 있는 기기 탐색을 위한 사물인터넷 통합 시스템 개발)

  • Ryu, Shinhye;Kim, Sangwook
    • Journal of Korea Multimedia Society
    • /
    • v.20 no.5
    • /
    • pp.791-799
    • /
    • 2017
  • With the development of the internet of things, sensor and device are can be applied to various scenario. Overall improving of the dependability index of internet of things is the ultimate goal. And reliability aims to increase the success rate of internet of things service delivery. Many studies about internet of things system have been made on the system to assess a dependability for providing reliable service to user, but it has difficult to reflect the user context for evaluating the device reliability. Also, most do not consider the availability of content information. In this paper, it proposed dependable device searching system in the internet of things environment. This system evaluates device dependability based on device status and measured data. Through the proposed system, it can be provided reliable context information for user-centric service.

Design of A Haptic Device for Dismantling Process Using Excavator (굴삭기를 이용한 해체 장비용 햅틱 장치 설계)

  • Kim, Dong-Nam;Oh, Kyeong-Won;Hong, Dae-Hie;Park, Jong-Hyup
    • Proceedings of the KSME Conference
    • /
    • 2007.05a
    • /
    • pp.1190-1194
    • /
    • 2007
  • Since the dismantling processes of building are very dangerous, there have been many studies to develop a remote operating devices using joystick. In this paper, in order to improve the operability of the dismantling actuator that is usually an excavator, a novel concept of tele-operated haptic device is proposed. Operators who use this haptic device with additional environmental sensing devices can work safely away from the dangerous sites. First, based on the concept design of the haptic device, the workspace mapping from the haptic device to the excavator is explored. Second, the kinematics which deals with the conversion from the 3 dimensional position information of the haptic device to the joint variable information of the backhoe is included. Lastly, 3D graphical simulation of both haptic device and the backhoe will be shown. This new design of the haptic device can be easily manufactured and gives the workers very convenient and transparent remote control capability.

  • PDF

Design and Implementation of a Fast DIO(Digital I/O) System (고속 DIO(Digital I/O) 시스템의 설계와 제작)

  • Lee, Jong-Woon;Cho, Gyu-Sang
    • The Transactions of the Korean Institute of Electrical Engineers D
    • /
    • v.55 no.5
    • /
    • pp.229-235
    • /
    • 2006
  • High speed PC-based DIO(Digital I/O) system that consists of a master device and slave I/O devices is developed. The PCI interfaced master device controls all of serial communications, reducing the load on the CPU to a minimum. The slave device is connected from the master device and another slave device is connected to the slave device, it can repeated to maximum 64 slave devices. The slave device has 3 types I/O mode, such as 16 bits input-only, 16 bits output-only, and 8bits input-output. The master device has 2 rings which can take 64 slaves each. Therefore, total I/O points covered by the master is 2048 points. The slave features 3 types of input/output function interchangeability by DIP switch settings. Library, application, and device driver software for the DIO system that have a secure and a convenient functionality are developed.

Fast Device Discovery for Remote Device Management in Lighting Control Networks

  • Choi, Sang-Il;Lee, Sanghun;Koh, Seok-Joo;Lim, Sang-Kyu;Kim, Insu;Kang, Tae-Gyu
    • Journal of Information Processing Systems
    • /
    • v.11 no.1
    • /
    • pp.125-133
    • /
    • 2015
  • The Remote Device Management (RDM) protocol is used to manage the devices in the lighting control networks. RDM provides bi-directional communications between a controller and many lighting devices over the DMX512-A network. In RDM, using a simple binary search scheme, which is based on the 48-bit unique ID (UID) of each device, discovers the lighting devices. However, the existing binary search scheme tends to require a large delay in the device discovery process. In this paper, we propose a novel partition-based discovery scheme for fast device discovery in RDM. In the proposed scheme, all devices are divided into several partitions as per the device UID, and the controller performs device discovery for each partition by configuring a response timer that each device will use. From numerical simulations, we can see that there is an optimal number of partitions to minimize the device discovery time for a given number of devices in the proposed scheme, and also that the proposed partition-based scheme can reduce the device discovery time, as compared to the existing binary search scheme.