• Journal of the Korean Society of Clothing and Textiles
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• v.22 no.3
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• pp.303-311
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• 1998

We developed a pattern drafting computer program using a popular CAD program for the purpose of the automatic manufacturing and education based on the concept of the easy -order-system which can easily reflect body characteristics and design favors of individuals to the ready-made clothing. The programs were written in Auto LISP which can utilise most of frictions of the Auto CAD, and the result of the design for an full-pleated skirt was shown. Also, we devised an easy way to set the location of reference points by inputting of tangential angle only for the use of the cubic spline curve which can represent body shape very well. Finally, by marking down all of symbols needed in manufacturing process, we completed the automatic pattern drafting program to make it useful as an industrial pattern without any amendment or correction in cutting and sewing operation.

• Proceedings of the Korean Information Science Society Conference
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• 2007.06c
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• pp.446-449
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• 2007

영상 학습은 컴퓨터를 이용한 자동 시각 검사에서 매우 중요하고 어려운 단계이다. 전자산업과 같이 신제품 개발 주기가 짧고 다양한 제품들을 검사하여야 하는 분야에서 어렵고 복잡한 학습 과정은 큰 문제가 되고 있다. 본 연구에서는 CAD 파일을 이용하여 PCB 자동 시각 시스템의 학습 과정을 손쉽게 할 수 있는 방안을 제시하였다.

• Journal of Korea Multimedia Society
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• v.12 no.3
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• pp.397-408
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• 2009

Image training is a very important yet difficult state for automated visual inspection using computers. Because the size of parts for the recently produced PCB (Printed Circuit Board) becomes smaller and circuit patterns gradually become more complex, a difficult and complex training process is becoming a big problem within an industry where development cycle for new products is short and various products must be inspected. This research produced a reference image by using CAD (Gerber) file which becomes a standard for PCB automatic visual inspection. Reference image from a Gerber file guarantees PCB patterns with no defects. Through system implementation and experimentation, Gerber file is used in order to propose a plan which allows an easy training process for PCB automatic visual inspection system.

• Journal of the Korean Institute of Telematics and Electronics
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• v.26 no.2
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• pp.112-117
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• 1989

This paper describes to the unit rectangle EB direct writing lithography method using SEM. This method has the constant exposure time to any rectangle pattern. In order to change the EB current according to various rectangle size for the constant exposure time, the supply current of condenser lens in controlled by BITMAP-IV CAD system. By this method, the resizing procedure of density pattern area is not needed to pattern data conversion, and the through-put ofr exposure is increased about 172 times compared with the unit scan exposure method.

• Transactions of the Korean Society of Mechanical Engineers
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• v.16 no.1
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• pp.31-40
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• 1992

This paper presents an automatic feature recognition system for recognizing and extracting feature information needed for the process planning input from a 3D CAD system. A given part is modeled by using the AutoCAD and feature information is automatically extracted from the AutoCAD database. The type of parts considered in this study is prismatic parts composed of faces perpendicular to the X, Y, Z axes and the types of features recognized by the proposed system are through steps, blind steps, through slots, blind slots, and pockets. Features are recognized by using the concept of convex points and concave points. Case studies are implemented to evaluate feasibilities of the function of the proposed system. The developed system is programmed by using Turbo Pascal on the IBM PC/AT on which the AutoCAD and the proposed system are implemented.

• Korean Journal of Human Ecology
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• v.7 no.1
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• pp.1-10
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• 2004

The purpose of this study is to observe the teaching method and cognition process in using the PAD, Lectra and Investronica pattern CAD system. It is necessary to gather information about apparel pattern CAD to enable clothing and textile educators to efficiently incorporate CAD into their curricula and to provide more substantial information. Interviews and questionnaires were used in the research and twenty four questionnaires were used for data analysis. The results of this study are as follows: 1) Students thought that new technology such as apparel pattern CAD is important in the apparel industry, and they have a positive vision toward such innovation. 2) Student who study harder during in CAD class worked easily of all PAD, Investronica and Lectra system. 3) The most preferred teaching method is to small group instruction by the instructor and then having feedback from the instructor. 4) Students realized that they needed to take prerequisites subjects like clothing construction. 5) The most interesting step is the pattern grading system and the least interesting but easiest step is digitize for patterns in the Investronica system.

• Fashion & Textile Research Journal
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• v.11 no.1
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• pp.112-120
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• 2009

The purpose of this study is to develop Andongpo apparel pattern design connected with the Apparel CAD system. It includes pattern making, grading, marking program. In this study, it will be able to make apparel pattern quickly and accurately by using Apparel CAD system. The results were as following : Computerization of the pattern making process is expected to provide higher accuracy and efficiency in apparel pattern making for narrow and expensive Andongpo. ESMOD pattern making method was selected as basic pattern. Tailored jacket patterns were developed for Andongpo. Refer to and . The jacket patterns developed is automatically depicted by inputting consumer's body size. Tailored jacket patterns for Andongpo were marked by using marking program in Apparel CAD system. The efficiency of marking appeared of 70% or more in Andongpo jacket patterns. This results is showed it has an effect on narrow and expensive Andongpo. 3tailored jacket patterns will be able to make a simulation by 3D Apparel CAD system. The results of this study is expected to provide higher consumer's satisfaction and internet brand launching. In addition, encouraging majority of the young to participate in using CAD program for Andongpo is regarded as beneficial for the reinforcement of competitiveness of traditional clothing business.

• Proceedings of the Korean Fiber Society Conference
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• 1994.04a
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• pp.30-30
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• 1994

• Proceedings of the Korean Fiber Society Conference
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• 1994.04a
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• pp.31-32
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• 1994

• The Transactions of the Korea Information Processing Society
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• v.2 no.3
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• pp.425-432
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• 1995

In this paper we propose a design and implementation technique of a universal automatic test pattern generator(UATPG) which is well suited for VLSI digital circuits. UATPG is designed to extend the capabilities of the existing APTG and to provide a convenient environment to computer-aided design(CAD) users. We employ heuristic techniques in line justification and fault propagation for functional gates during test pattern generation for a target fault. In addition, the flip-flops associated with design for testability (DFT) are exploited for pseudo PIs and pseudo POs to enhance the testabilities of VLSI circuits. As a result, UATPG shows a good enhancement in convenient usage and performance.