• Proceedings of the KIEE Conference
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• 2006.07a
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• pp.490-491
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• 2006

Based on the real field test of 22.9kV HTS cable, which is installed in Gochang Power Testing Center located in Chonbuk Province, the standard for the performance test and the quality evaluation have been established. This work will be applied to the development of HTS cable and the purchase process as a practical material. In particular, new items for the cable evaluation such as the measurement of critical current and the heat loss, which was not dealt with in conventional cable, are specified in detail.

• Journal of the Semiconductor & Display Technology
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• v.14 no.2
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• pp.67-72
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• 2015

For the development of UFS device test system, M-PHY specifications should be matched with MIPI-standard which is analog signal protocol. In this paper, the implementation methodology and hardware structure for the M-PHY AFE (Analog Front End) Block was suggested that it can be implemented using universal components without ASIC process. The testing procedure has a jitter problem so to solve the problems we using ASIC process, normally but the ASIC process needs a lot of developing cost making the UFS device test system. In is paper, the suggestion was verified by the output signal which was compared to the MIPI-standard on the Prototype-board using universal components. The board was reduced the jitter on the condition of HS-TX and 5.824 Gbps Mode in SerDes (Serialize-deserializer). Finally, the suggestion and developed AFE block have a useful better than ASIC process on developing costs of the industrial UFS device test system.

• Proceedings of the Korean Reliability Society Conference
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• 2011.06a
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• pp.305-309
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• 2011

Reliability evaluation of One-Shot systems which fly at speed of Mach must evaluate as the result which leads a many firing test. But many firing test the fact that is impossible is actuality with problem of budget. Method of prediction leads consequently with alternative and will be able to present the alternative which evaluates. Prediction of One-Shot systems that how many did accumulate a many experience data according to the accuracy is decided, there is a possibility of seeing. One like shot our country and the method which is indirect leads from the environment where the test data is insufficient and only will not be able to set the direction of prediction, the present paper about such method describes 217 Plus where is a reliability prediction standard which is new the thing in standard.

• Proceedings of the KIEE Conference
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• 1996.07c
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• pp.1791-1793
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• 1996

This paper describes Thermal-Mechanical performance and Ultimate Mechanical-Strength test for the purpose of aging analysis of suspension insulator. The temperature difference of insulator surface according to the aging of suspension insulator brought out about $2^{\circ}C$ to $7-8^{\circ}C$ difference comparing with the atmospheric temperature. Quality standard and Mechanical-Strength of used suspension insulator deteriorate more remarkably than that of new suspension insulator. It is required that Thermal-Mechanical performance test standard be revised in the future. And it is described about the development prospect of polymer insulators

• Proceedings of the Korean Society of Machine Tool Engineers Conference
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• 1999.10a
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• pp.119-124
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• 1999

This paper presents new approach to technology pattern recognition of camera back cover and test of soldering. In real-time implementing of pattern recognition camera back cover and test of soldering, the MVB-03 vision board has been used. Image can be captured from standard CCD monochrome camera in resolutions up to 640$\times$480 pixels. Various options re available for color cameras, a synchronous camera reset, and linescan cameras. Image processing os performed using Texas Instruments TMS320C31 digital signal processors. Image display is via a standard composite video monitor and supports non-destructive color overlay. System processing is possible using c30 machine code. Application software can be written in Borland C++ or Visual C++

• Proceedings of the Korean Society of Precision Engineering Conference
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• 1996.11a
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• pp.933-937
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• 1996

In this paper, the behavior of plastic zone in the notch tip was studied under Loye's Micro Vickers Hardness Measurement Method. The direction forming maximum plastic zone was estimated by finite element analysis. In the experiments, cold rolling sheet SGCD3, SK5 and hot rolling sheet SS41, S4SC was used to study the influence of carbon contents on plastic zone. The standard hardness test specimen and the notch hardness test specimen was made and loaded cyclically. The specimen was aged to stabilize the hardness. After aging treatment, the notch specimen was made and simple tension load of 50% yield strength was applied. The hardness test at the notch tip until the hardness data of standard hardness specimen was checked was performed.

• Fibers and Polymers
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• v.6 no.2
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• pp.162-168
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• 2005

A methodology for the objective evaluation of water repellency is studied using image analysis of the sprayed pattern on woven fabrics according to a standard spray test (AATCC Test Method 22-2001). The wet area ratio obtained from the spray standard test ranking is found to be exponentially related with its water repellency rating. Mean filtering is used to remove the effect of weave texture and the transmitted light through interyarn spaces. The ring frame of the instrument and wet region are recognized using Otsu thresholding technique. And Hough transform and outline operation are used to obtain the size and position of the ring frame. The objective assessment of the water repellency using image processing can reduce unnecessary confusion in the subjective determination of the water repellency.

• Proceedings of the KIEE Conference
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• 1999.07a
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• pp.318-320
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• 1999

Electric motor transforms electric power into mechanical power. It is important to increase efficiency of motor to save energy and to decrease operating cost. In this paper, some parameters and losses of high-efficiency induction motor and standard induction motor are measured by blocked-rotor test and no-load test. Operational parameters of high-efficiency induction motor that are compared with those of standard motor.

• Transactions of the Korean Society of Mechanical Engineers B
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• v.28 no.11
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• pp.1315-1321
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• 2004

Quantitative performance test on the conventional 2D-PIV and the hybrid angular 3D-PIV(Stereoscopic PIV) was carried out. LES Data sets on an impinging jet which are provided on the webpage(http://www.vsj.or.jp/piv) for the PIV Standard Project were used for the generation of virtual images. The generated virtual images were used for the 2D-PIV and 3D-PIV measurements test. It has been shown that the results obtained by 2D-PIV on average values are slightly closer to the LES data than those obtained by 3D-PIV, but the turbulent properties obtained by 2D-PIV are largely underestimated than those obtained by 3D-PIV.

• Journal of Industrial Technology
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• v.31 no.A
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• pp.123-128
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• 2011

In this study, procedures, a power performance testing system of Wind Turbine System Research Center of Kangwon National University is introduced. Test prodedures and results are presented on a stand-alone vertical-axis 200W wind turbine manufactured by Geum-Poong Energy Inc.. Power performance test is performed according to IEC standard. The test results are compared with the power performance standard. Also, the effects of normalization and disturbed sectors are considered.