• Title/Summary/Keyword: electronic play

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Efficiency Enhancement in Organic Polymer Solar Cells with Ferroelectric Films (강유전 고분자 박막을 이용한 유기고분자 태양전지에서의 효율 증대)

  • Park, Jayoung;Jung, Chi Sup
    • Journal of the Korean Institute of Electrical and Electronic Material Engineers
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    • v.30 no.2
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    • pp.126-132
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    • 2017
  • The power conversion efficiency of organic polymer solar cells was enhanced by introducing a ferroelectric polymer layer at the interface between active layer and metal electrode. The power conversion efficiency was increased by 50% through the enhancement of the open circuit voltage. To investigate the role of the ferroelectric layer on the dissociation process of the excitons, non-radiative portion of the exciton decay was directly measured by using photoacoustic technique. The results show that the ferroelectric nature of the buffer layer does not play any roles on the dissociation process of the excitons, which indicates the efficiency enhancement is not due to the ferroelectricity of the buffer layer.

The Cold Welding Properties for Al Wire of Aged Overhead Conductor (폐가공송전선 Al선재 냉간접합 특성)

  • Kim, Shang-Shu;Ku, Jae-Kwan;Lee, Young-Ho;Kim, Byung-Geol
    • Journal of the Korean Institute of Electrical and Electronic Material Engineers
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    • v.26 no.5
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    • pp.415-420
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    • 2013
  • The new recycling technology for aged Aluminum wires in overhead conductor have been carried out. We are attempting to develop remanufacturing method for them for more effective way of recycling in stead of its conventional remelting process. The weld of aged aluminum wires play a vital role in remanufacture process. The paper investigates the mechanical properties during cold welding process of aged Aluminum wire. The tensile tests and microscopic analysis results are discussed to underscore the hardening features of welded aluminum wire. Various graphs are presented accompanied by discussion about their relevance on the process.

Combustion Pressure Monitoring System for Engine Control; By Simultaneous and Continuous Measuring of All Cylinders

  • Mihara, Y.;Maruyama, Y.;Okada, Y.;Kido, H.;Nishida, O.;Fujita, H.;Ito, M.
    • Journal of Advanced Marine Engineering and Technology
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    • v.28 no.2
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    • pp.269-276
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    • 2004
  • A marine diesel engine should realize optimal efficiency operation while reducing NOx. Fuel injection systems by electronic control can become effective means for that. Although it would be able to get more precise engine control compared to the mechanical injection system, it needs some accurate and instant information in order to bring its ability into full play while sailing on the sea. Very important information of them is shaft torque and continuous combustion pressure of all cylinders. The system presented in this report can deliver those data.

Utilization of Vision in Off-Line Teaching for assembly robot (조립용 로봇의 오프라인 교시를 위한 영상 정보의 이용에 관한 연구)

  • 안철기
    • Proceedings of the Korean Society of Machine Tool Engineers Conference
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    • 2000.04a
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    • pp.543-548
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    • 2000
  • In this study, an interactive programming method for robot in electronic part assembly task is proposed. Many of industrial robots are still taught and programmed by a teach pendant. The robot is guided by a human operator to the desired application locations. These motions are recorded and are later edited, within the robotic language using in the robot controller, and play back repetitively to perform robot task. This conventional teaching method is time-consuming and somewhat dangerous. In the proposed method, the operator teaches the desired locations on the image acquired through CCD camera mounted on the robot hand. The robotic language program is automatically generated and downloaded to the robot controller. This teaching process is implemented through an off-line programming software. The OLP is developed for an robotic assembly system used in this study. In order to transform the location on image coordinates into robot coordinates, a calibration process is established. The proposed teaching method is implemented and evaluated on an assembly system for soldering electronic parts on a circuit board. A six-axis articulated robot executes assembly task according to the off-line teaching in the system.

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Development of Jacket Compounds for URD Power Cables (지중 케이블용 외피 컴파운드 개발)

  • Han, Jae-Hong;Kim, Ju-Yong;Kim, Dong-Myung;Song, Il-Keun
    • Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
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    • 2002.05c
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    • pp.7-10
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    • 2002
  • In this study, polyolefin compounds were developed and evaluated for replacing a jacket material of URD power cables. The characteristics of compounds were investigated by water vapor transmission (WVT) test and mechanical test. In WVT test, all polyolefin compounds showed the superior water resistance to conventional PVC. The molecular structure and density of polyolefin play an important role in WVT. Also, polyolefin compounds showed the suitable characteristics in mechanical test. Especially, polyolefin compounds having linear molecules showed the superior characteristics to LDPE ones. From this study, it can be considered that polyolefin compounds may be suitable to jacket material for URD power cables.

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Prediction of forming accuracy using FEM analysis in slitting process for connector terminal with micro width (미세폭 슬리팅 공정에서 유한요소해석을 이용한 성형 정밀도 예측)

  • Hong, Seok-Kwan;Lee, Byung-Moon;Kang, Jeong-Jin;Kim, Jong-Deok
    • Design & Manufacturing
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    • v.2 no.3
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    • pp.45-50
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    • 2008
  • In the electronic products, connector which play a role of board-to-board connection is an essential part. The manufacture process of this connector involves slitting and bending stage. Recently, manufacturing the connector is becoming more and more difficult as miniaturization of the electronic products. In this study, FEM analysis was performed on slitting and bending process for connector terminal with micro width in order to predict the cause of inaccurate dimension of connector terminal which occurs in actual industrial spot.

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A Study on the Multi-Channel Microphone (다채널 마이크로폰 음향장치에 관한 연구)

  • Kim, Cheol-Woon
    • Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
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    • 2003.05b
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    • pp.96-102
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    • 2003
  • Today, stage technology is developing highly by application of digital computer. Performance is composed of audio/video and acoustic technology takes very important position in field of stage technology. Generally speaking, four factors of sound are loudness, pitch, sound timbre and duration. Loudness depends on sound pressure level, yet partly related with spectrum and dulation. Pitch depends mainly on frequence and have a relation with sound pressure and duration. sound timbre depends strongly on spectrum and have a relation with frequence. In this paper, I designed a multi-microphone system which can used in broadcasting and performance stage with vicboss 200MHz-VHF wireless microphone and vicboss 900MHz-VHF wireless microphone. I also studied about multi-microphone which can use conveniently in the super play that needs many microphones. If this multi-microphone is prodused, we could expect better sound quality and a big progress in stereo recording technology.

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Analysis of GPS Software Receiver (GPS Software 수신기의 분석)

  • Zhang, Wei;Suh, Hee-Jong
    • The Journal of the Korea institute of electronic communication sciences
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    • v.13 no.1
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    • pp.229-236
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    • 2018
  • In this paper, we see the acquisition and tracking of L1 C/A signal on GPS receiver, do the research on GPS signal capture principle's foundation, and do the simulation of the GPS signals capture process for it's realizing and analyzing by Matlab. The simulation result, we can confirm this method's accuracy and the feasibility, and see that a satellite receiving ability play an important role in the efficiency of receiver.

The roles of electronic marketplace for buyer-supplier relationship: collaborative system architecture

  • Han, Seong-Yoon
    • Proceedings of the Korea Association of Information Systems Conference
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    • 2005.12a
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    • pp.381-387
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    • 2005
  • As the most widely used media of BtoB e-business, the e-Marketplace (EM) can play an important role in the age of c-commerce (collaborative commerce). In supply chain management (SCM) area, the relationship-based collaboration among partners has shown great efficiency. Although the collaboration is important in both areas of EM and SCM there has been a critical difference in the selection of trade partners between them. In this paper, the EM's collaborative stages for integration with its customer system are reviewed and a system architecture is proposed for EM's electronic functional role within the perspective of collaborative commerce and buyer-supplier relationship. The relationship-based BtoB commerce through EM is reviewed to explain that it can be more beneficial than the commerce based on the price competitive selection of trade partners. With the proposed system architecture, an EM can be the functional medium for the collaborative IOIS system architecture.

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A Study on Bonded Joints of Composite Hollow Bushing (Composite Hollow Bushing의 접합기술에 관한 연구)

  • Cho, Han-Goo;Kang, Hyung-Kyung;Yoo, Dea-Hoon
    • Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
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    • 2008.06a
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    • pp.493-494
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    • 2008
  • During the last years hollow core insulators started their success story in the field of high voltage engineering for electrical apparatus, substituting porcelain insulators. The termination, also named top and bottom fittings are used for the connection to the rest of the electrical apparatus. The top and bottom flange are attached to the composite to transmit mechanical load and also ensure the gas tightness. They are bonded by epoxy glue with a glass transition temperature of about $130^{\circ}C$-$150^{\circ}C$ the glass reinforced epoxy tube of filament winding. This paper describes the results of a study on the bonded joints of fiber reinforced epoxy tube and cast aluminum. This suggests that surface roughness and glue types play an important role in evaluating of gas sealing capability on the flange and fiber reinforced epoxy tube in the composite hollow bushing.

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