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Stitching 기술과 B-Spline에 의한 3차원 정합
양한진(Han-Jin Yang),안민철(Min Cheol Ahn),주영훈(Young Hoon Joo),이규호(Kyu Ho Lee),박병해(Byoung Hae Park) 대한전기학회 2009 대한전기학회 학술대회 논문집 Vol.2009 No.7
본 논문에서는 비접촉식 미세 측정 광학기에 의해 측정된 이미지를 Stitching 기술과 B-Spline 보간법에 의해 보다 빠르고, 정밀한 복원 기법을 제안한다. 이를 위해 먼저 각각의 이미지로부터 매칭, 피매칭 템플릿(Template)을 검출한다. 그런 다음 두 이미지의 오버랩(Overlap)되는 부분을 기준하여 기준면으로부터 roll, pitch, yaw 오차를 계산하여 매칭시킨다. 마지막으로, B-Spline 보간법에 의해 매칭된 부분을 연속화한다. 제안된 방법은 실험을 통해 그 응용 가능성을 증명한다.
장기성(Ki Sung Chang),박동근(Dong Keun Park),양성은(Seong Eun Yang),안민철(Min Cheol Ahn),조대호(Dae Ho Jo),김현규(Hyoun Kyu Kim),고태국(Tae Kuk Ko) 대한전기학회 2006 대한전기학회 학술대회 논문집 Vol.2006 No.7
This paper deals with an efficient superconducting joint method between 2G high superconducting(HTS) wire, YBCO coated conductor(CC). Recently CC is one of the most promising superconducting wire due to high n-value and critical current independency from external magnetic field. It is expected to be used many superconducting application such as fault current limiter, persistent current system and cable etc. In most HTS applications, superconducting magnet is used, and it is necessary to joint between superconducting wire to fabricate superconducting magnet system. A CC tape used in this research consists of copper stabilizer, silver layer, YBCO layer, buffer and substrate. Direct joint using soldering method was inefficient due to resistance of copper, then copper lamination is removed by chemical etching method to reduce resistance between CC tapes. Jointed tapes were fabricated and tested. Transport current through jointed area and induced voltage were measured to characterize the I-V curve. Resistance between CC wire using chemical etching was compared with resistance of direct jointed tapes using soldering method in this paper.
무유도 초전도 한류 코일의 층간 간격에 따른 전자기적 특성 연구
양성은(Seong Eun Yang),박동근(Dong Keun Park),김영재(Young Jae Kim),장기성(Ki Sung Chang),안민철(Min Cheol Ahn),고태국(Tae Kuk Ko) 대한전기학회 2009 대한전기학회 학술대회 논문집 Vol.2009 No.7
Superconducting fault current limiters (SFCLs) provide one of the most effective solutions to cope with enormous increase of fault current level. The 13.2 ㎸/ 630 A class resistive SFCL using coated conductor (CC) was developed and its short-circuit test was successful. Successful commercialization of the SFCL requires that no loss is produced by impedance of limiting coil during normal operation. Since the limiting coil consists of inner layer and outer layer, gap length between the layers is an important parameter to analyze the electromagnetic characteristics of coil. This paper deals with the electromagnetic characteristics of coil according to gap length through the simulation and analysis in comparison with experiment results.