• Title, Summary, Keyword: junction box

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Intelligent Monitoring Network System (지능형 모니터링 네트웍 시스템 구성에 관한 연구)

  • 김영구;조현찬;김두용;전홍태
    • Proceedings of the Korean Institute of Intelligent Systems Conference
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    • pp.393-398
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    • 2000
  • In this paper, we propose an Intelligent Monitoring Network System(IMNS) for the truck scale balance system. Truck scale balance system consis of three parts; Load cell part, Indicator part, and Junction box part. IMNS is attached to Junction box in truck scale balance system. Even if Load cell have been some problems, a truck scale balance system still has been run to determine, the values involved error. Therefore prosed system is has concentrated on Load cell part. Other Parts have been changed a portion of circuit for monitoring system.

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Intelligent Diagnosis System for an Electronic Weighting Machine (전자 저울을 위한 지능형 고장 진단 시스템)

  • 김종원;김영구;조현찬;서화일;김두용;이병수
    • Proceedings of the Korean Institute of Intelligent Systems Conference
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    • pp.78-82
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    • 2001
  • Electronic Weighting Machine is used an electronic scale which has many trouble because of broken load cells. In this paper, we propose an intelligent Diagnosis System will for an electronic weighting machine using fuzzy logic. It's purpose be detect of the load cell's trouble. The electronic circuit of system, which call 'junction box', will be connected resistances in a series at circuit of Wheatstone Bridge for monitoring the condition of load cells.

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The Intelligent Monitoring System for a heavy weight scale (고 중량 측정 장치를 위한 지능형 모니터링 시스템)

  • 김영구;조현찬;정병우;김두용
    • Proceedings of the IEEK Conference
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    • pp.41-44
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    • 2000
  • In this paper, we propose an Intelligent Monitoring Network System(IMNS) for The truck scale balance system. Truck scale balance system consis of three parts; Load cell part, Indicator part, and Junction box part. IMNS is attached to Junction box in truck scale balance system. Even if Load cell have been some problems, a truck scale balance system still has been run to determine, the values involved error. therefore prosed system is has concentrated on Load cell part. Other Parts have been changed a portion of circuit for monitoring system.

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Evaluation of Power Generation Performance for Bifacial Si Photovoltaic Modules installed on Different Artificial Grass Floors (인조잔디 바닥종류에 따른 양면수광형 실리콘 태양광 모듈의 발전성능 평가)

  • Yoo, Younggyun;Seo, Yeongju;Park, Dohyun;Kim, Minsu;Jang, Hojun;Kwon, Young Hoon;Hwangbo, Chul;Kim, Woo Kyoung;Chang, Sungho
    • Journal of Energy Engineering
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    • v.27 no.3
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    • pp.1-9
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    • 2018
  • In this study, the outdoor evaluation test was performed to characterize the highly-reflective artificial grass to be used for bifacial photovoltaic (PV) power generation system. The 60-cell n-type Si monofacial and bifacial PV modules were employed, where two types of bifacial modules were equipped with split-type and box-type junction boxes, respectively. The results showed that the split-type junction box improved the rear-side power production and thus energy yield of bifacial module compared to the box-type junction box causing the shadow effect. Highly-reflective artificial grass achieved relatively high albedo of 0.18, and excellent bifacial gain of 33%, compared to conventional artificial grass with an albedo of 0.14-0.15, and bifacial gain of 29-30%.

Reliability-Based Assessment of Safety and Residual Load Carrying-Capacity of Curved Steel-Box Ramp Bridges (신뢰성에 기초한 강상형 곡선램프교의 안전도 및 잔존내하력 평가)

  • Cho, Hyo-Nam;Choi, Young-Min;Min, Dae-Hong
    • Journal of Korean Society of Steel Construction
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    • v.9 no.1
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    • pp.51-63
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    • 1997
  • Highly curved steel-box bridges are usually constructed as ramp structures for the highway interchange and metropolitan elevated highway junction, but a number of these bridges are deteriorated and damaged to a significant degree due to heavy traffic. The main objective of the study is to develop a practical reliability-based assessment of safety and residual load carrying-capacity of existing curved steel-box ramp bridges. In the paper, for the realistic assessment of safety and residual load carrying-capacity of deteriorated and/or damaged curved steel-box bridges, an interactive non-linear limit state model is formulated based on the von Mises's combined stress yield criterion. It is demonstrated that the proposed model is effective for the assessment of reliability-based safety and the evaluation of residual load carrying-capacity of curved steel-box bridges. In addition, this study comparatively shows the applicability of various reliability analysis methods, and suggests a practical and effective one to be used in practice.

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The Gettering Effect of Boron Doped n-type Monocrystalline Silicon Wafer by In-situ Wet and Dry Oxidation

  • Jo, Yeong-Jun;Yun, Ji-Su;Jang, Hyo-Sik
    • Proceedings of the Korean Vacuum Society Conference
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    • pp.429-429
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    • 2012
  • To investigate the gettering effect of B-doped n-type monocrystalline silicon wafer, we made the p-n junction by diffusing boron into n-type monocrystalline Si substrate and then oxidized the boron doped n-type monocrystalline silicon wafer by in-situ wet and dry oxidation. After oxidation, the minority carrier lifetime was measured by using microwave photoconductance and the sheet resistance by 4-point probe, respectively. The junction depth was analyzed by Secondary Ion Mass Spectrometry (SIMS). Boron diffusion reduced the metal impurities in the bulk of silicon wafer and increased the minority carrier lifetime. In the case of wet oxidation, the sheet resistance value of ${\sim}46{\Omega}/{\Box}$ was obtained at $900^{\circ}C$, depostion time 50 min, and drive-in time 10 min. Uniformity was ~7% at $925^{\circ}C$, deposition time 30 min, and drive-in time 10 min. Finally, the minority carrier lifetime was shown to be increased from $3.3{\mu}s$ for bare wafer to $21.6{\mu}s$ for $900^{\circ}C$, deposition 40 min, and drive-in 10 min condition. In the case of dry oxidation, for the condition of 50 min deposition, 10 min drive-in, and O2 flow of 2000 SCCM, the minority carrier lifetime of 16.3us, the sheet resistance of ${\sim}48{\Omega}/{\Box}$, and uniformity of 2% were measured.

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The Monitoring System of Photovoltaic Module using Fault Diagnosis Sensor (태양전지 모듈 고장진단센서를 이용한 모니터링 시스템)

  • Park, Yuna;Kang, Gihwan;Ju, Youngchul;Kim, Soohyun;Ko, Sukwhan;Jang, Gilsoo
    • Journal of the Korean Solar Energy Society
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    • v.36 no.5
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    • pp.91-100
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    • 2016
  • This paper proposes the PV module fault diagnosis sensor which is applied to Zigbee wireless network, and monitoring system using the developed sensor. It is designed with embedded sensor in junction box. The diagnosis elements for algorithm were voltage and temperature. For that reason, It is able to reduce the price and separate the fault of bypass diode from shading differently from other monitoring systems. This fault diagnosis algorithm verified through the Field-installed operations of PV module.

Formation of p$^{+}$-n ultra shallow junction with Co/Ti bilayer silicide contact (Co/Ti 이중막 실리사이드 접촉을 갖는 p$^{+}$-n 극저접합의 형성)

  • 장지근;엄우용;신철상;장호정
    • Journal of the Korean Institute of Telematics and Electronics D
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    • v.35D no.5
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    • pp.87-92
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    • 1998
  • Ultr shallow p$^{+}$-n junction with Co/Ti bilayer silicidde contact was formed by ion implantation of BF$_{2}$ [energy : (30, 50)keV, dose:($5{\times}10^{14}$, $5{\times}10^{15}$/$\textrm{cm}^2$] onto the n-well Si(100) region and by RTA-silicidation and post annealing of the evaporated Co(120.angs., 170.angs.)/Ti(40~50.angs.) double layer. The sheet resistance of the silicided p$^{+}$ region of the p$^{+}$-n junction formed by BF2 implantation with energy of 30keV and dose of $5{\times}10^{15}$/$\textrm{cm}^2$ and Co/Ti thickness of $120{\AA}$/(40~$50{\AA}$) was about $8{\Omega}$/${\box}$. The junction depth including silicide thickness of about $500{\AA}$ was 0.14${\mu}$. The fabricated p$^{+}$ -n ultra shallow junction depth including silicide thickness of about $500{\AA}$ was 0.14${\mu}$. The fabricated p$^{+}$-n ultra shallow junction with Co/Ti bilayer silicide contact did not show any agglomeration or variation of sheet resistance value after post annealing at $850^{\circ}C$ for 30 minutes. The boron concentration at the epitaxial CoSi$_{2}$/Si interface of the fabricated junction was about 6*10$6{\times}10^{19}$ / $\textrm{cm}^2$./TEX>.

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A Study on the Fire Risk of Black Box Wiring in Motor Vehicle (자동차의 블랙박스 와이어링 화재 위험성에 관한 연구)

  • Kang, Sin-Dong;Kim, Ju-Hee;Choi, Jun-Pyo;Kim, Jae-Ho
    • Journal of the Korean Society of Safety
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    • v.32 no.6
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    • pp.22-28
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    • 2017
  • According to the National Fire Data System (NFDS), more than 5,000 vehicle fires have occurred every year for the last 10 years. Vehicle fires are primarily caused by mechanical (breaking system and engine), electrical (wiring and battery), and chemical (oil and fuel gas leakage) problems. The electrical factor has increased with the installation of driver convenience equipment. For example, today, the black box is widely used to provide video data recording of motor vehicle accidents. The black box consists of a front camera, rear camera, and wires. The black box wires are directly connected to the junction box or fuse box from the start battery that operates to provide normal on power supplying for engine stop. It is extremely dangerous when the wires short circuit due to insulation aging, mechanical and electrical stress, etc. In this study, the black box wiring fire risk have been analyzed and investigated when the steady state and abnormal operations, and under the following conditions: wiring arrangements with a high temperature condition, insulation aging, poor contact, and short circuits. The results showed that black box wiring short circuits had a higher fire risk than the other fire hazard elements. To prevent fire hazards caused by black box wiring, the black boxes must be installed by qualified service personnel. Do not modify the wiring, remove the fuse and secure the wiring using cable ties or insulation tape.