• 디자인학연구
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• 제13권3호
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• pp.145-152
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• 2000

사용자와의 상호작용이 중요한 인터렉티브 시스템의 디자인 프로세스는 곧 연속적인 프로토타이핑을 통한 검증과 피드백 과정이라 할 수 있다. 이런 프로토타이핑을 기반으로 한 디자인 프로세스는 프로토타입을 매개체로 하여 디자인 문제를 탐색하고 학제적 개발팀의 다른 구성원과 커뮤니케이션할 뿐 아니라 사용성 테스트를 통하여 사용자의 의견을 수렴한다. 따라서 시스템과 프로젝트의 목적에 따라 그것에 적합한 프로토타이핑 전략이 필요하며 이런 프로토타이핑 전략에 따라 최종 결과물의 질이 달라질 수 있다. 따라서 본 연구에서는 최적의 프로토타이핑 전략을 수립하기 위하여 프로토타입을 둘러싼 여러 문제점들을 밝히고 이를 통해 프로토타입을 보다 광범위하게 이해하고자 하였으며 프로토타이핑 전략을 수립하기위한 하나의 틀로서 프로토타입 모델을 제시하였다.

• 융합보안논문지
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• 제6권1호
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• pp.91-103
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• 2006

임베디드 제품의 개발 비용과 경쟁력 강화를 위한 개발 방법론으로 널리 이용되고 있는 것이 프로토타이핑이다. 프로토타이핑에는 컴퓨터 기술을 이용한 가상 프로토타이핑과 레고 블록을 이용한 실물 프로토타이핑이 있다. 가상 프로토타이핑 환경에서는 다양한 컴포넌트와 라이브러리를 제공함으로써 정밀한 단위까지의 타겟 모델의 시뮬레이션이 가능하고 실물 프로토타이핑 환경에서는 타겟 모델의 임베디드 구동 환경에 가까운 시뮬레이션 환경을 제공하다. 하지만, 가상 프로토타이핑 환경에서는 실제 타겟 모델의 구동 환경 요소까지의 시뮬레이션이 어렵고 실물 프로토타이핑 환경에서는 다양하고 정밀한 정보가전분야의 소형 제품까지의 시뮬레이션이 어려운 실정이다. 본 논문에서는 이런 가상과 실물 프로토타이핑 환경의 단점을 보완하기 위한 통합 프로토타이핑 시스템을 위한 인터페이스를 ActiveX 컴포넌트 기술과 TCP/IP 소켓 통신 데이터 연동 인터페이스를 설계 및 구현하였다.

• 한국정밀공학회지
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• 제16권1호통권94호
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• pp.95-107
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• 1999

The design models of a new product in general are created using clay models or wooden mock-ups. The reverse engineering(RE) technology enables us to quickly create the CAD model of the new product by capturing the surface of the model using laser digitizers or coordinate measuring machines. Rapid prototyping (RP) is another technology that can reduce the product development time by fabricating the physical prototype of a part using a layered manufacturing technique. In reverse engineering process, however, the digitizer generates an enormous amount of point data, and it is time consuming and also inefficient to create surfaces out of these data. In addition, the surfacing operation takes a great deal of time and skill and becomes a bottleneck. In rapid prototyping, a faceted model called STL file has been the industry standard for providing the CAD input to RP machines. It approximates the CAD model of a part using many planar triangular patches and has drawbacks. A novel procedure that overcomes these problems and integrates RE with RP is proposed. Algorithms that drastically reduce the point clouds data have been developed. These methods will facilitate the use of reverse engineered geometric data for rapid prototyping, and thereby will contribute in reducing the product development time.

• 한국콘텐츠학회논문지
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• 제9권5호
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• pp.40-49
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• 2009

최근 임베디드 시스템 개발시간을 단축시키고 고객들의 요구사항을 충족시키기 위하여 많은 방법론과 개발환경 방법들이 제시되고 있다. 특히. 본 논문에서는 임베디드 시스템 개발 시 사용되는 교차개발환경을 개선하여 개발시간을 단축시키는 방법을 제안하였다. 이러한 방법은 가상 프로토타이핑 개발도구와 임베디드 시스템 개발 보드를 이용하여 개발환경을 하는 경우에 제한적으로 적용된다. 구현 및 실험결과 분석을 통하여 한 번 이상의 수정이 요구되는 교차개발환경에서는 기존 개발 방법보다 본 논문에서 제시한 방법이 우수함을 증명하였다.

• 한국CDE학회논문집
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• 제12권2호
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• pp.87-94
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• 2007

The functional behavior of a consumer electronic product is nearly all expressed with human-machine interaction (HMI) tasks. Although physical prototyping and computer aided design (CAD) software can show the appearance of the product, they cannot properly reflect its functional behavior. In this paper, we propose an approach to virtual prototyping (VP) that incorporates HMI functional simulation into virtual reality techniques in order to enables users to capture not only the realistic look of a consumer electronic product but also its functional behavior. We adopt state transition methodology to capture the HMI functional behavior of the product into a state transition chart, which is later used to construct a finite state machine (FSM) for the functional simulation of the product. The FSM plays an important role to control the transition between states of the product. We have developed a VP system based on the proposed approach. The system receives input events such as mouse clicks on buttons and switches of the virtual prototype model, and it reacts to the events based on the FSM by activating associated activities. The system provides the realistic visualization of the product and the vivid simulation of its functional behavior using head-mounted displays (HMD) and stereo speakers. It can easily allow users to perform functional evaluation and usability testing. A case study about the virtual prototyping of an MP3 player is given to show the usefulness of the proposed approach.

• 대한치과보철학회지
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• 제39권6호
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• pp.633-640
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• 2001

Statement of problem. Relatively low success rate of root analogue implant system was supposed to be due to the time duration between extraction and implant installation. The use of three-dimensional computer tomography and the reconstruction of objects using rapid prototyping methods would be helpful to shorten this time. Purpose. This aim of this study was to evaluate the application possibility of the 3-dimensional computer tomography and the rapid prototyping to root analogue implants. Material and methods. Ten single rooted teeth were prepared. Width and height of the teeth were measured by the marking points. This was followed by CT scanning, data conversion and rapid prototyping model fabrication. 2 methods were used; fused deposition modelling and stereolithography. Same width and height of this models were measured and compared to the original tooth. Results. Fused deposition modelling showed an enlarged width and reduced height. The stereolithography showed more exact data compared with the fused deposition modelling. Smaller standard deviation were recorded in the stereolithographic method. Overall width error from tooth to rapid prototyping was 7.15% in fused deposition modelling and 0.2% in stereolithography. Overall height showed the tendency of reducing dimensions. Conclusion. From the results of this study, stereolithography seems to be very predictable method of fabricating root analogue implant.

• 한국정밀공학회:학술대회논문집
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• 한국정밀공학회 1997년도 춘계학술대회 논문집
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• pp.552-556
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• 1997

The Direct Metal Prototyping(DMP), one of the rapid prototyping technologies, allows the manufacturing of three-dimensional metallic parts using metal powders directly from the CAD data. Laser power and scanning speed are the most important variables of the process. The objective of this study is to obtain the design data for laser power and scanning speed to bond metal powders effectively using the finite element method. To obtain the design values, a numerical analysis considering two-dimensional heat transfer during the sintering of metal powder layers of the process was performed. The laser beam has been modeled to have directionality in its heat flux distribution, i. e., in the scanning direction a Gaussian beam mode distribution has been assumed and in the thickness direction a square beam mode distribution. The three-dimensional irregular distribution of metal powders of the powder layer is idealized as two-dimensional distribution in which metal powders are located regularly and periodically on the plate. In this study the design values of laser power vs scanning speed have been obtained. Temperature distribution and temperature variation of the powder layers with respect to time have been predicted. The commputed dsign data will be useful in determining the initial conditions of the process.

• International Journal of Advanced Culture Technology
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• 제6권3호
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• pp.129-141
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• 2018

As the scope of social expectations and roles in the design field has expanded, the demand for education to cope with changes in the technology environment is increasing in design education. In response to this trend, microcontroller board-type design-prototyping tools have also been introduced into design education, and much educational content is being developed. However, there is the perception that students who are majoring in design without engineering knowledge are still barred from entry. A variety of educational content and tools have been developed to solve these difficulties, although there are several limitations to their practical application. Especially, in the design education courses in universities, the functional expectation level for prototyping is high, but most of the content developed for solving the difficulties has been developed for the lower education levels, and it could be said that a great deal of learning is necessary to solve the problem. In this study, students were asked about microcontroller board utilization and their satisfaction with their design through questionnaires and with the developed microcontroller board development direction via Focus Group Interviews. Based on this, we tested microcontroller boards that eliminate the coding process and which students can use to create and prototype their work as a suggestion to fulfil demand. After using the board, both the usability and improvement of the product were checked. Confirmation of the usefulness of the free- coding-type microcontroller was obtained through this study along with the possibility of responding to various educational demands by applying the application design related to this product.

• Archives of Plastic Surgery
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• 제32권6호
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• pp.796-797
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• 2005

In plastic and reconstructive craniomaxillofacial surgery, careful preoperative planning is essential to get a successful outcome. Many craniomaxillofacial surgeons have used imaging modalities like conventional radiographs, computed tomography(CT) and magnetic resonance imaging(MRI) for supporting the planning process. But, there are a lot of limitations in the comprehension of the surgical anatomy with these modalities. Medical models made with rapid prototyping (RP) technique represent a new approach for preoperative planning and simulation surgery. With rapid prototyping models, surgical procedures can be simulated and performed interactively so that surgeon can get a realistic impression of complex structures before surgical intervention. The great advantage of rapid prototyping technique is the precise reproduction of objects from a 3-dimensional reconstruction image as a physical model. Craniomaxillofacial surgeon can establish treatment strategy through preoperative simulation surgery and predict the postoperative result.

• 한국디자인학회:학술대회논문집
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• 한국디자인학회 2004년도 춘계 학술발표대회 논문집
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• pp.216-217
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• 2004