• Title/Summary/Keyword: 동력분류

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Development of PCB Classification System Using Robot Arm and Machine Vision (로봇암과 머신비전을 이용한 기판분류 시스템 개발)

  • Yun, Tae-Jin;Yeo, Jeong-Hun;Kim, Hyun-Su;Park, Seung-Ryeol;Hwang, Seung-Hyeok
    • Proceedings of the Korean Society of Computer Information Conference
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    • 2020.01a
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    • pp.145-146
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    • 2020
  • 현재 4차 산업 혁명 시대에서 가장 중요한 화두는 빅데이터(Big Data), 인공지능이며, 이를 이용한 분야로 생산, 제조 분야에서도 인공지능 영상 인식 기술을 활용한 생산품을 자동으로 분류하고 나아가 품질검사도 할 수 있도록 개발하고 있다. 또한, 로봇을 공장의 생산라인에 운영하여 노동력 감소에 따른 보완이 되고, 제조과정의 효율성 증가와 생산시간 감소로 생산성을 높일 수 있다. 이를 위해 본 논문에서는 실시간 객체감지 기술인 YOLO-v3 알고리즘을 이용해서 PCB보드 인식, 분류할 수 있는 시스템을 개발하였다.

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A Patent Analysis on Components Technologies of Absorption Refrigeration System (흡수식 냉동기의 요소기술에 관한 특허분석)

  • Bay, Y.M.;Shim, Y.;Park, Y.C.
    • Journal of Power System Engineering
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    • v.8 no.3
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    • pp.11-17
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    • 2004
  • An analysis was conducted to predict technical trends for the highly efficient absorption refrigeration system. The study was based on submitted patent during January 1981 and December 2000 in Korea, Japan and U.S.A. The analysis are divided with two categories as component technology and refrigeration type technology. The analysis was focused on component technologies rather than the absorption cycle or system technologies.

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Development of CVTs Composed of a 2K-H I Type Differential Gear Unit and a V-belt Drive (2K-H형 I 형식 차동기어장치와 V-belt 전동장치를 결합한 무단변속기의 개발)

  • Kim, Yeon-Su;Choi, Sang-Hoon
    • Transactions of the Korean Society of Mechanical Engineers A
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    • v.26 no.6
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    • pp.1060-1068
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    • 2002
  • Compound continuously variable transmission(CVT) mechanisms are proposed, which can offer a backward mode, a geared neutral, an underdrive mode and an overdrive mode. They are composed of a 2K-H I type differential gear unit, a V-belt type continuously variable unit(CVU), a few friction clutches and gears, and not required of a starting device as a torque converter. Compound CVT mechanisms developed here present two distinct operating modes which are a power circulation mode and a power split mode. The transition of two modes takes place at the particular CVU speed ratio. For these CVT mechanisms, performance analysis related to speed ratio, power ratio and efficiency are executed and proven by experimental studies.

Performance Analysis of Compound CVTs with a 2K-HI (2K-HI 형식 복합형 무단변속기의 성능실험)

  • Park J.M.;Kim Y.S.;Lee S.H.;Choi S.H.
    • Proceedings of the Korean Society of Precision Engineering Conference
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    • 2005.06a
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    • pp.1345-1348
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    • 2005
  • We designed the compound CVT (Continuously Variable Transmissions) by combining power circulation mode CVT and power split mode CVT, which have been proposed for connecting 2K-H I differential gear to the V- belt type CVU (Continuously Variable Unit), as an input coupled type. With the designed compound CVT, we carried out theoretical analysis and performance experiments. We proved that the compound CVT had a better performance than either of the power circulation mode or power split mode.

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Performance Analysis of CVTs with a 2K-H II Differential Gear (2K-HII차동기어 결합형 무단변속기의 성능해석)

  • 박재민;김연수;최상훈
    • Journal of the Korean Society for Precision Engineering
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    • v.21 no.4
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    • pp.170-178
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    • 2004
  • Continuously variable transmission (CVT) mechanisms considered here are input coupled types that combine the functions of a 2K-H II type differential gear and a V-belt type continuously variable unit (CVU). For the 8 different mechanisms, 4 of them are power-circulation modes while the other 4 are power-split modes, various performance analysis (speed ratios, power flows, divisions of power transmission in a differential gear and a CVU, and theoretical efficiencies) are performed to vary design parameters. Experimental studies are executed to validate fundamental relations (speed ratios, power flows, efficiencies, occurrence of geared neutral). Some useful characteristics associated with performance also are discussed in the mechanisms.

Strip Rupture Detection System of Cold Rolling Mill using Transient Current Signal (과도 전류신호를 이용한 냉간 압연기의 판 터짐 검지 시스템)

  • Yang, S.W.;Oh, J.S.;Shim, M.C.;Kim, S.J.;Yang, B.S.;Lee, W.H.
    • Journal of Power System Engineering
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    • v.14 no.2
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    • pp.40-47
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    • 2010
  • This paper proposes a fault detection system to detect the strip rupture in six-high stand Cold Rolling Mills based on transient current signal of an electrical motor. For this work, signal smoothing technique is used to highlight precise feature between normal and fault condition. Subtracting the smoothed signal from the original signal gives the residuals that contains the information related to the normal or faulty condition. Using residual signal, discrete wavelet transform is performed and acquire the signal presenting fault feature well. Also, feature extraction and classification are executed by using PCA, KPCA and SVM. The actual data is acquired from POSCO for validating the proposed method.

A Classification on the Causes of Wind Turbine Accidents (풍력발전기의 사고 발생요인의 분류)

  • Kim, Gui-Shik;Jeong, Ji-Hyun
    • Journal of Power System Engineering
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    • v.19 no.4
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    • pp.76-81
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    • 2015
  • The production of electricity from wind energy is noticed as economic power generation system in the natural resource. Lately, since lots of wind turbine have installed globally, the accidents have increased gradually. In this paper, we classified domestic information for 10 years, information of new energy and industrial technology development organization(NEDO) for 4years and caithness windfarms information forum(CWIF) for 15 years according to part and cause of wind turbine accident. We found that the main causes of accidents are storm, lightening and carelessness. The results of classifying and analyzing the informations, should be used to take measures on the accident prevention of wind turbine.

Investigation into the Uncertainty in Measurements and Evaluation of Hand-transmitted Vibration (동력공구 작업시 수전달 진동에 관한 측정 불확도 분석)

  • Jang, Han-Kee;Song, Chi-Mun;Choi, Seok-Hyun;Hong, Seok-In
    • Proceedings of the Korean Society for Noise and Vibration Engineering Conference
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    • 2006.05a
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    • pp.1265-1267
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    • 2006
  • 현재 ISO 에서는 공구제조업체에서 해당 공구의 수전달 진동을 측정하여 제시하도록 하는 규격을 제정 중에 있으며, 이를 위해서는 공구에서 발생하는 진동과 영향을 평가하는 기술이 확보되어야 하며, 이 과정에서 측정 불확도 수준을 결정하는 것이 매우 중요하다고 하겠다. 본 연구에서는 동력 공구 작업시 작업자의 손으로 전달되는 진동을 측정하고 그 영향을 평가함에 있어서 발생할 수 있는 불확도를 분석하였다. 먼저, ISO 5349 규격을 적용함에 있어서 존재하는 불확도 인자들을 분류하고, 각 인자들이 어느 정도 수준의 불확도를 발생시키는지 시험을 통해서 확인하고 분석하였다.

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10th Accelerate the Growth of Home-Network Industry Technology Development (10대 성장동력 산업인 홈네트워크 산업 핵심 기술분류 연구)

  • Chol Sung;Kim Seng-Chan;Sun Jin-Kook;Cho Sang-Il;Cha Sung-Hun;Kim Hoon
    • Proceedings of the KAIS Fall Conference
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    • 2005.05a
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    • pp.260-262
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    • 2005
  • 10대 성장동력산업의 핵심이자 IT839의 핵심과제인 홈네트워크 시스템 연구가 본격적으로 연구되고 있다. 홈네트워크 사업의 특징은 고급형 아파트가 아닌 일반 보급형 아파트를 대상으로 하여 보다 많은 사람들에게 홈네트워크의 혜택을 누릴 수 있게 함으로써 국내 산업육성과 경제 활성화를 추구하고 있다. 본 논문에서는 홈네트웍크산업의 표준화 기술요소에 대하여 연구하였다.

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Compound CVT realizing Power Circulation Mode and Power Split Mode (동력순환형과 동력분류형을 구현 가능한 복합형 무단변속기)

  • Choi Sang-Hoon;Kim Yeon-Su
    • Transactions of the Korean Society of Machine Tool Engineers
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    • v.14 no.4
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    • pp.96-103
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    • 2005
  • We designed the compound CVT(Continuously Variable Transmissions) by combining power circulation mode and power split mode, which have been proposed for connecting 2K-H I differential gear to the V- belt type CVU(Continuously Variable Unit), as an input coupled type. With the designed compound CVT, we carried out theoretical analysis and performance experiments for efficiency, speed ratio, power flow, and power transmission ratio. We proved that the compound CVT had a better performance than either of the power circulation mode or power split mode.