• Journal of the Korea Convergence Society
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• v.11 no.11
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• pp.249-255
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• 2020

This study developed the health monitoring method of press process using the acoustic emission (AE) sensor and high-pass filter. Also, the AE parameters such as ring-down count and peak amplitude are used. Based on this AE signal, the AE parameters were acquired and was utilized to detect the crack of the specimen. Since the defect detection is difficult due to noise and low magnitude of signal, the signal noise and press operation frequency were checked through the Short Time Fourier Transform(STFT) and damped. High-pass Filtering data was applied to AE parameters to select effective parameters. By using this signal processing techniques, the proposed AE parameters could improve the performance of defect detection in the press process.

• Proceedings of the Korean Information Science Society Conference
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• 2004.04b
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• pp.523-525
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• 2004

기존의 웹 컨텐츠를 휴대폰이나 poA등과 같은 개인용 단말기에 표현하기에는 단말기 성능상의 제약(낮은 CPU 성능, 작은 출력 화면, 입출력 방법의 단순함 등)이 따르게 되므로 컨텐츠 변환의 과정이 필요하게 된다. 트랜스코딩이감 기존의 웹 컨텐츠를 단말기의 환경에 따라 적합한 형태로 변환하는 것을 의미하며, HTML 문서의 레이아웃 정보를 이용하여 변환하는 연구가 다양하게 이루어져 왔다. 본 논문에서는 사용자 의견을 반영한 XML문서의 정확한 트랜스 코딩을 위하여 시맨틱 어노테이션 기법을 제안한다. XML 문서의 트랜스코딩에는 IPTC(International Press Telecommunications Council)에서 정한 NewsML을 기반으로 하였으며, 본 논문에서 제안하는 트랜스코딩 프레임워크는 크게 3단계로 나뉘어 진다. 어노테이션 생성 및 인식, 어노테이션의 구조 정보를 활용한 페이지 생성 및 페이지 앱 구성, 디바이스에 따른 페이지의 변환으로 구성된다. 향후 연구로는 어노테이션과 페이지 생성 기법을 통해 생성된 XML 문서를 CC/PP를 이용하여 poA나 휴대폰 등의 시스템에 적합하게 변환하는 기법 등이 요구된다.

• Journal of the Korea Convergence Society
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• v.11 no.1
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• pp.175-180
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• 2020

In this study, we developed a micropattern technology in the shape of RFID TAG antenna using ultrasonic micropattern manufacturing system developed to enable micropattern technology. The ultrasonic tool horn in longitudinal vibration mode was installed in the micropattern manufacturing system to develop the ultrasonic press technology for the micropattern antenna shape of the RFID TAG antenna shape on the insulating sheet surface. The ultrasonic shaping technology was manufactured by applying the resonance design technique to a 60kHz tool horn, and by using the micropattern manufacturing system, the coil wire having a thickness of 25㎛ can be ultrasonically press-molded on an insulating sheet of 200㎛ or less. In ultrasonic press technology, the antenna shape having a minimum line width of 150㎛ could be molded without disconnection, peeling, or twisting of the coil wire.

• Journal of the Korean Institute of Intelligent Systems
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• v.19 no.5
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• pp.706-712
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• 2009

In this paper, a fault diagnosis method is proposed to detect and classifies faults that occur in press process line. An oil level automatic monitoring method is also presented to detect oil level. The FFT(fast fourier transform) frequency analysis and ART2 NN(adaptive resonance theory 2 neural network) with uneven vigilance parameters are used to achieve fault diagnosis in proposing method, and GUI(graphical user interface) program for fault diagnosis and oil level automatic monitoring using LabVIEW is produced and fault diagnosis was done. The experiment results demonstrate the effectiveness of the proposed fault diagnosis method of induction motors and oil level automatic monitor system.

• Journal of the Korean Society of Manufacturing Process Engineers
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• v.6 no.4
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• pp.92-97
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• 2007

A temporary structure is a framework of metal poles and planks, used as a working platform from which building repairs or construction can be carried out safety. The manufacturing process of the existing model consumes a many hour. So, it is modified manufacturing process. In this study, it is attempted to find out the shape of modified working platform considering manufacturing process and using Taguchi method, and it reduces production process. The design parameters are defined to discribe shape of model. As a result of the shape design, maximum Von-Mises stress and displacement considering a safety factor were satisfied with CTEA (Construction Temporary Equipment Association of Korea) standard.

• Journal of Advanced Marine Engineering and Technology
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• v.16 no.3
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• pp.51-57
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• 1992

Authors had analyzed the Press machine's vibrational characteristics by Substructure Synthesis Method. This paper discribes the structural Dynamic Optimization for the machine using Sensitive Analysis Method. The substructure synthesis method and sensitive analysis methods are used for the vibration analysis and structural modification. The results obtained are as follows ; 1. The tooling precision of the press machine is ruled by the bending vibration of the slide. 2. The structural Modification Method for minimizing impact responses is proposed, and modal analysis and sensitive analysis method are introduced to solve it. 3. The impact responses of running machine were reduced to 40% of the unmodified machine by using the proposed method.

• Proceedings of the Korean Society for Technology of Plasticity Conference
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• 2008.05a
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• pp.353-356
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• 2008

Tool design is carried out for a press forming of a cross member in the rear suspension assembly based on the result of the finite element analysis. The analysis simulates the two-stage stamping process with the initial design and it fully reveals the unfavorable mechanism which develops inferiorities during forming. In this paper, a new design guideline is proposed to modify the process and tool shapes for a single-stage forming process. With the improved tool design, this study fabricates prototypes that satisfy the durability requirement.

• Journal of the Korean Society of Mechanical Technology
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• v.20 no.6
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• pp.824-829
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• 2018

Molding is the root industry of the manufacturing as a means to mass-produce developed prototypes. Molds are typically divided into injection molds and press mold industries. Injection molds produce the products by injection of molten plastic into a mold, and press molds are molded and bended plate. The ejection system, such as eject pins, is used to separate the manufactured products from the mold, which involves a number of hole operations. Location, diameter and depth of holes are often tabulated and managed collectively when designing 2D drawings. The design efficiency was realized by applying CATIA Automation to the 3D model and bringing in the data of the holes in the Excel data.

• Journal of Digital Convergence
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• v.18 no.5
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• pp.391-397
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• 2020

This article aims to introduce a representative case of convergence among art, technology and science, and look into the factors that contributed to its success. The focus is specifically brought to the cooperation between the Plantin Press and local painters in Antwerp in the Netherlands during the 16th century. The Plantin Press scored huge successes through collaboration with Flemish artists such as Rubens and Borcht. This helped the artists to use their talents in a new medium or to secure a job that appreciates their values. The Plantin Press outdid its competitors in the market through applying new techniques on its works. Great botany books also came out as a result of such convergence. The backdrop to the Netherlands appearing as the center of botanical studies in the 17th century is the concerted efforts of the painters that created quality illustrations and the publishers that knew how to use them efficiently.

• Journal of Nuclear Fuel Cycle and Waste Technology(JNFCWT)
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• v.16 no.1
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• pp.123-136
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• 2018

The objective of this study is to propose a new methodology to fabricate a reliable engineering-scale buffer block, which shows homogeneous and uniform distribution in buffer block density, for in-situ experiments. In this study, for the first time in Korea, floating die press and CIP (Cold Isostatic Press) are applied for the manufacture of an engineering-scale bentonite buffer. The optimized condition and field applicability are also evaluated with respect to the method of manufacturing the buffer blocks. It is found that the standard deviation of the densities obtained decreases noticeably and that the average dry density increases slightly. In addition, buffer size is reduced by about 5% at the same time. Through the test production, it is indicated that the stress release phenomenon decreases after the application of the CIP method, which leads to a reduction in crack generation on the surface of the buffer blocks over time. Therefore, it is confirmed that the production of homogeneous buffer blocks on industrial scale is possible using the method suggested in this study, and that the produced blocks also meet the design conditions for dry density of buffer blocks in the AKRS (Advanced Korea Reference Disposal System of HLW).