• Title/Summary/Keyword: Noncontact

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A Study on the Development of Noncontact Soldering Device of PV Cells Using Infrared Lamp (적외선 램프를 이용한 비접촉식 태양전지셀 솔더링 장치 개발에 관한 연구)

  • Lho, Tae-Jung;Kim, Seon-Jin;Park, Min-Yong
    • Journal of the Korea Academia-Industrial cooperation Society
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    • v.14 no.1
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    • pp.45-50
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    • 2013

  • The reflector of infrared lamp is designed to the optimal circular shape through the analyses of lumination distributions with a triangular, rectangular and circular configurations of infrared lamps respectively by using Photopia. PLC is used to compare and amplify the difference between soldering temperature profile and feedback value. It is fed to IR lamp controller which adjusts the soldering temperature of PV cell. The soldering temperature measured using an infrared temperature sensor is then fed back to the PLC. The closed control loop of soldering temperature on a PV cell is implemented. The noncontact soldering device of PV cells using infrared lamp which is easily operated by HMI operation panel and controlled robustly by PLC and IR lamp controller is developed.

  • https://doi.org/10.5762/KAIS.2013.14.1.45 인용 PDF KSCI

Splice Strengths of Noncontact Lap Splices Using Strut-and-Tie Model (스트럿-타이 모델을 이용한 비접촉 겹침 이음의 이음 강도 산정)

  • Hong, Sung-Gul;Chun, Sung-Chul
    • Journal of the Korea Concrete Institute
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    • v.19 no.2
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    • pp.199-207
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    • 2007

  • Strut-and-tie models for noncontact lap splices are presented and parameters affecting the effective lap length $(l_p)$ and the splice strength are discussed in this paper. The effective lap length along which bond stress is developed is shorter than the whole lap length. The effective lap length depends on the transverse reinforcement ratio $({\Phi})$ and the ratio of spacing to lap length $({\alpha})$. As the splice-bar spacing becomes wider, the effective lap length decreases and, therefore, the splice strength decreases. The influence of the ratio ${\alpha}$ on the effective lap length becomes more effective when the transverse reinforcement ratio is low. Because the slope of the strut developed between splice-bars becomes steeper as the ratio ${\Phi}$ becomes lower, the splice-bar spacing significantly affects the effective lap length. The proposed strut-and-tie models for noncontact lap splices are capable of considering material and geometric properties and, hence, providing the optimal design for detailing of reinforcements. The proposed strut-and-tie model can explain the experimental results including cracking patterns and the influence of transverse reinforcements on the splice strength reported in the literature. From the comparison with the test results of 25 specimens, the model can predict the splice strengths with 11.1% of coefficient of variation.

  • https://doi.org/10.4334/JKCI.2007.19.2.199 인용 PDF KSCI