• 한국가시화정보학회:학술대회논문집
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• 한국가시화정보학회 2004년도 Proceedings of 2004 Korea-Japan Joint Seminar on Particle Image Velocimetry
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• pp.57-63
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• 2004

various applications is presented. It is based on rapid-prototyping of transparent model for flow visualization and on the use of refractive index matching that enables efficient and clear visualization of the flow inside the model. The model is immersed in the index-matching fluid in a glass tank so that any displacement and rotation of the model in the tank have no influence on the optical setup for image acquisition to be made through a glass wall. This can facilitate greatly the camera calibration for stereo PIV and 3-D PTV. As the flow model is generated directly from 3-D surface data, no laborious preparation of the flow model is needed. This approach for seamless linking of model generation and PIV measurement is applicable to various flow measurements in automobile, ship building, fluid machinery, turbine, electrical appliances, heat exchanger, electronic cooling, bio-engineering and so on.

• 제어로봇시스템학회:학술대회논문집
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• 제어로봇시스템학회 1989년도 한국자동제어학술회의논문집; Seoul, Korea; 27-28 Oct. 1989
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• pp.206-210
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• 1989

In automobile glass fitting the stud is welded on the window seating panel in order to insert the plastic molding onto the stud. Since this type of process is in general manually done, almost 50% of the output turns out to be failure resulted from work inefficiency and weld inferiority. Therefore, it is required to improve this process for the productivity elevation through the application of the robot.

• 한국산학기술학회논문지
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• 제20권8호
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• pp.657-661
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• 2019

자동차 산업은 전 세계적으로 매출액이 1조 달러가 넘고 1천만 명 이상을 고용하고 있는 세계최대 제조업으로서, 약 2만 여개의 부품으로 완성되는 복합적 성격의 대표적인 산업이며 자동차 조립공정은 도장된 차체에 약 3천여 종의 내장, 계기판, 시트, 유리, 엔진, 트랜스미션, 차축 등의 유닛(Unit)을 조립하는 노동집약적 공정으로, 타 공정에 비해 자동화 비율이 가장 낮은 특징을 가지고 있다. 또한, 현재의 자동차 조립공정은 작업자의 조립작업에 대한 실시간 모니터링이 이루어지고 있지 못한 실정으로, 작업자의 작업 공구위치 측정시스템의 도입을 통해 공구의 위치를 실시간으로 파악하고 분석하여 일관된 작업 순서를 지시하면서 작업의 누락 및 가감을 체크한다면, 자동차 제조공정에서 발생할 수 있는 불량을 사전에 차단하여 조립공정의 생산성 및 품질향상을 이룰 수 있다. 따라서 본 논문에서는 작업자의 작업공구 위치 측정 시스템의 도입을 통해 일관된 작업 순서를 지시하면서 작업의 누락 및 가감을 체크하고, 제조공정에서 발생할 수 있는 조립불량을 사전에 차단하여 조립공정의 생산성 및 품질향상을 이룰 수 있는 실시간 공구 위치추적 시스템의 구성을 위하여 UWB(Ultra Wide Band) 무선측위를 활용한 공구의 실시간 위치추적시스템을 개발하고 그 효용성을 증명하고자 한다.

• 대한기계학회:학술대회논문집
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• 대한기계학회 2007년도 춘계학술대회B
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• pp.2546-2551
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• 2007

Weather Strip(W/S) is a rubber part to proof water, sound and dust for opening and shutting devices including vehicle doors. And it requires high dimension precision and durability to proof water, noise, vibration and etc. But ironically it itself makes some wind noise because of some protuberance with glasses. The air flow analysis of door part of vehicle makes it possible to calculate and find out the cause of wind noise. In previous analysis, we focus on the numerical air flow analysis of the automobile side part. We do 2D-C.F.D first and 3D second. Through simulations, we can calculate the amount of sound pressure level at the glass run and find out the effects of glass run to make wind noise. Finally we can improve shape of glass run to reduce wind noise although it is small amounts of sound pressure reduction compared with total vehicle noise level.

• 한국산학기술학회논문지
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• 제11권9호
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• pp.3148-3154
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• 2010

본 논문에서는 충격손상 복합재료의 피로수명 저하 특성과 이의 변동성을 통계적으로 분석하였다. 충격손상 복합재료의 잔류강도는 2모수 Weibull 분포에 잘 적합되었으며 충격에너지의 증가에 따라 잔류강도의 변동성은 감소 하였다. 복합재료의 피로수명은 충격손상에 의하여 크게 저하되었으며 또한 이의 피로수명에 대한 충격손상의 영향은 작용 응력진폭에 따라 변화함을 알 수 있었다. 또한 2모수 Weibull 분포를 이용하여 충격손상 복합재료의 피로수명의 변동성을 추정하였으며 충격에너지의 증강 및 응력진폭의 감소에 따라 피로수명의 변동성은 점차 감소하였다.

• 한국해양공학회:학술대회논문집
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• 한국해양공학회 2000년도 춘계학술대회 논문집
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• pp.157-163
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• 2000

The application as the parts of an automobile, using the property of GMT-Sheet, is increasing. In order to exchange the parts of an automobile for GMT-Sheet, at first, the establishment and joining problem of exact joining strength must be determined. We have studied it using composites which is not same each other fiber oriented condition so as to determine joining strength and joining condition of GMT-Sheet. In this study, the result of experiment of forming condition concerned joining problem of GMT-Sheet is this ; joining efficiency of GMT-Sheet, increases as lap joint length L increases. Increase of compression ration cause decrease of joining efficiency after of GMT-Sheet, joining. In the viewpoint of recycling, randomly oriented composite of GMT-Sheet is desirable more than unidirectional oriented composite. We have better design the structure so as not occur to stress centralization on the joining part.

• 제어로봇시스템학회:학술대회논문집
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• 제어로봇시스템학회 2000년도 제15차 학술회의논문집
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• pp.553-553
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• 2000

The application as the parts of an automobile, using the property of GMT-Sheet, is increasing. In order to exchange the parts of an automobile for GMT-Sheet, at first, the establishment and joining problem of exact joining strength must be determined. We have studied it using composites which is not same each other fiber oriented condition so as to determine joining strength and joining condition of GMT-Sheet. h this study, the result of experiment of forming condition concerned joining problem of GMT-Sheet is this ; joining efficiency of of GMT-Sheet, increases as lap joint length L increases. Increase of compression ratio causes decrease of joining efficiency after of GMT-Sheet joining. In the viewpoint of recycling, randomly oriented composite of GMT-Sheet is desirable more than unidirectional oriented composite. We has better design the structure so as not to occur to stress centralizatien on the joining part.

• 한국해양공학회지
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• 제15권2호
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• pp.111-119
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• 2001

The application as the parts of an automobile, using the property of GMT-Sheet, is increasing. In order to exchange the parts of an automobile for GMT-Sheet, at first, the establishment and problem of exact joining strength must be determined. We have studied it using composites which is not same each other fiber oriented condition so as to determine joining strength and joining condition of GMT-Sheet. In this study, the result of experiment of forming condition concerned joining problem of GMT-Sheet is this; joining efficiency of GMT-Sheet, increases as lap joint length L increases. Increase of compression ratio causes decrease of joining efficiency after of GMT-Sheet joining. In the viewpoint of recycling, randomly oriented composite of GMT-Sheet is desirable more than unidirectional oriented composite. We has better design the structure so as not to occur to stress centralization on the joining part.

• 한국산학기술학회논문지
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• 제11권2호
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• pp.426-434
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• 2010

본 논문에서는 충격손상을 갖는 유리섬유강화 복합재료의 강도 저하 특성과 이의 통계적 특성을 실험적으로 평가하였다. 평직 복합재료의 주요 충격손상은 섬유파단과 모재균열로서 이는 층간분리가 주된 충격손상인 일방향 적층복합재료와는 상이한 양상이다. 일방향 적층복합재료에 대하여 제안된 기존의 잔류강도 예측모델을 이용하여 충격손상을 갖는 평직 glass/epoxy 복합재료의 잔류강도를 평가하였다. 그 결과 Avva 및 Caprino의 잔류강도 예측모델은 평직 복합재료의 잔류강도에 대해서도 잘 평가되었다. 또한 유리섬유강화 복합재료의 잔류강도에 대한 통계적 특성 평가를 위한 모델을 제안하였으며, 이를 통한 예측결과는 복합재료의 두께와 관계없이 실험결과를 잘 묘사하였다.

• 센서학회지
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• 제32권5호
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• pp.320-327
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• 2023

In this study, an FPGA-based sealer inspection system was developed to inspect the sealer applied to install vehicle glass on a car body. The sealer is a liquid or paste-like material that promotes adhesion such as sealing and waterproofing for mounting and assembling vehicle parts to a car body. The system installed in the existing vehicle design parts line does not detect the sealer in the glass rotation section and takes a long time to process. This study developed a line laser camera sensor and an FPGA vision signal processing module to solve this problem. The line laser camera sensor was developed such that the resolution and speed of the camera for data acquisition could be modified according to the irradiation angle of the laser. Furthermore, it was developed considering the mountability of the entire system to prevent interference with the sealer ejection machine. In addition, a vision signal processing module was developed using the Zynq-7020 FPGA chip to improve the processing speed of the algorithm that converted the profile to the sealer shape image acquired from a 2D camera and calculated the width and height of the sealer using the converted profile. The performance of the developed sealer application inspection system was verified by establishing an experimental environment identical to that of an actual automobile production line. The experimental results confirmed the performance of the sealer application inspection at a level that satisfied the requirements of automotive field standards.