• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
• /
• 2013.10a
• /
• pp.924-925
• /
• 2013

최근 미세가공 및 자동측정 분야가 고성능화 되어 자동화가 많이 실현되고 있다. 이러한 자동화는 고정밀도와 동시에 제품 생산에 대한 저비용, 단기납기, 고품질의 제품 창출로 이어진다. 현재 핸드폰 시장이 급성장함에 따라 핸드폰의 생산 주기가 현저하게 짧아지고 핸드폰 조립공정에 있어서 다양한 크기에 대한 핸드폰 평판표시장치인 LCD(Liquid Crystal Display)가 존재하고 있다. 핸드폰 조립공정에 있어서 이러한 다양한 LCD 표시장치(LCD, PDP, FED등)를 보호하기 위하여 보호매체인 PE/PET 필름을 부착하여 납품하도록 하고 있으며, 핸드폰 조립공정에서 발생할 수 있는 흠집 등 기타 불량을 줄이도록 노력하고 있다. 그러나 이러한 보호필름은 현재 핸드폰 조립공정 후판부에서 평판표시장치의 유리기판의 크기에 맞게 보호필름을 절단하도록 공정이 구성되어 있다. 본 논문에서는 이러한 핸드폰 조립공정을 개선하고 자동화하기 위하여 경박단소용 평판표시장치의 얇은 유리기판에 접착된 PE/PET 필름을 핸드폰의 다양한 패턴에 맞추어 하단의 유리기판에는 결함이 없도록 하여 보호필름만을 커팅 할 수 있는 커팅시스템을 제안하고 정밀계측에 대한 실험 데이터를 제시하고자 한다.

• Journal of Digital Convergence
• /
• v.13 no.1
• /
• pp.297-304
• /
• 2015

Recently, the demand for a PRT(Personal Rapid Transit) system based on autonomous navigation is increasing. Accordingly, the applicability investigations of the PRT system on rail tracks or roadways have been widely studied. In the case of unmanned vehicle operations without physical guideways on roadways, to monitor the position of the vehicle in real time is very important for stable, robust and reliable guidance of an autonomous vehicle. The Global Positioning System (GPS) has been commercially used for vehicle positioning. However, it cannot be applied in environments as tunnels or interiors of buildings. The PRT navigation system based on magnetic markers reference sensing that can overcome these environmental restrictions and the vehicle dynamics model for its H/W configuration are presented in this study. In addition, the design of a control S/W dedicated for unmanned operation of a PRT vehicle and its prototype implementation for experimental validation on a pilot network were successfully achieved.

• Proceedings of the Korean Geotechical Society Conference
• /
• 1999.10a
• /
• pp.103-108
• /
• 1999

This paper describes development of a new automated real-time system which preforms measurement data reduction and management, geotechnical backanalysis, and feedback design for embankment construction on soft ground. Such a system can be an effective, useful and economical tool for managing a large site development on soft ground. The system consists of data base system to characterize soil properties and identify instrumentation, analysis system for ground behavior and stability coupled with automatic monitoring system, and feedback design system which is a new technique to reflect the analysis of measured ground behavior against original design.

• Journal of the Korean Operations Research and Management Science Society
• /
• v.16 no.2
• /
• pp.79-79
• /
• 1991

This paper presents an automated visual inspection/measuring system for the door inner panel manufacturing process. The main objective of this research is to develop inspection applications with a machine vision system related to the determination or quantification of parameters such as dimension, shape, quality of surfaces, number of holes in a panel, and presence or absence of specific features. For quality measurements, we showed a subpixel image processing technology that will improve the consistency of results and level of precision. Also presented is a data analysis method th detect process shifts so that corrective action can be undertaken before more defective units are manufactured.

• Proceedings of the Korea Contents Association Conference
• /
• 2003.05a
• /
• pp.260-267
• /
• 2003

우리나라의 물의 공급을 위한 수도역사가 1백년을 넘어서고 있는데 반해 전체 물 생산량은 60％에서 70％ 초반에 머물고 있는 실정이다. 99년 기준 1일 평균생산 f한 물 432만 7천톤에서 요금 부과한 물의 양은 295만 1천톤으로 137만 6천톤이 증발한 것이다. 이를 금액으로 환산하면 천문학적인 것으로 다른 표현으로 유수율이 현저히 낮은 것이다. 이렇게 유수율이 현저히 떨어지는 요인에는 시설물 관리의 어려움과 자원 및 세수관리의 어려움으로 나누어 볼 수 있는데, 본 연구에서는 상기의 문제점들을 해소하기 위한 방안의 하나로 무선통신 기술을 이용한 효율적인 시설물 관리 및 검침 방안을 제시함으로써 유수율 제고 및 누수율 감소를 위한 대책을 제시함으로서 무선검침시스템의 안정성과 계측의 정확성 및 신뢰성에 대한 검증을 위해 충북 청주시 상당구 우암동 일부 지역을 선정하여 1시간 마다 자동 검침을 통해 효율적 검침 가능 여부와 설치 대비 경제성 등을 알아보기 위해서 실시하였다.

• Korean Management Science Review
• /
• v.16 no.2
• /
• pp.79-92
• /
• 1999

This paper presents an automated visual inspection/measuring system for the door inner panel manufacturing process. The main objective of this research is to develop inspection applications with a machine vision system related to the determination or quantification of parameters such as dimension, shape, quality of surfaces, number of holes in a panel, and presence or absence of specific features. For quality measurements, we showed a subpixel image processing technology that will improve the consistency of results and level of precision. Also presented is a data analysis method th detect process shifts so that corrective action can be undertaken before more defective units are manufactured.

• Journal of Animal Environmental Science
• /
• v.6 no.1
• /
• pp.23-30
• /
• 2000

A automated noncontact weight system for pigs consisted of a CCD-type video camera and 10 photo sensors connected to a computer. In the experiment 20 pigs(Large Yorkshire $\times$ Landrace breed) weighing from 95kg to 115kg were used. Pig's original image data was transformed to a binary image an image excluding head and tail portion from the whole binary image and the area of pig was calculated. Then pig's volume was calculated by multiplying the area by the body hight measured with photo sensors. The correlation equation between the above volume(x) and pig's weight was y=0.0007 x -9.2152($R^2$=0.9965) Performance of a automated noncontact weighing system for pigs was tested with this equation. The results showed $\pm$0.65kg average error and 1.63kg maximum error. It was concluded that performance of a automated noncontact weighing system is excellent.

• Proceedings of KOSOMES biannual meeting
• /
• 2017.04a
• /
• pp.254-254
• /
• 2017

• Proceedings of the KIEE Conference
• /
• 2007.04b
• /
• pp.31-34
• /
• 2007

회복전압 측정법(RVM: Recovery voltage measurement)은 최근 유럽지역에서 활발히 연구 진행되고 있는 절연 진단 기법 중의 하나로 소개된바 있으며, 오일과 절연지 사이에 스며든 수분량을 검출할 수 있는 진단 시스템기법이다. 변압기 내부의 절연물질에 대한 분극특성을 분석함으로서 열화진행정도 및 열화정도를 진단하는데 활용될 수 있다. 본 논문은 국산화의 일환으로 전기계측제어용 LabVIEW 프로그램을 활용하여 RVM 전 과정을 자동으로 사용할 수 있도록 자체 제작한 프로그램을 소개하고자 한다.

• KSCE Journal of Civil and Environmental Engineering Research
• /
• v.43 no.3
• /
• pp.321-335
• /
• 2023

Monitoring sediment loads in natural rivers is the key process in river engineering, but it is costly and dangerous. In practice, suspended loads are directly measured, and total loads, which is a summation of suspended loads and bed loads, are estimated. This study proposes a real-time sediment discharge monitoring system using the horizontal acoustic Doppler current profiler (H-ADCP) and support vector regression (SVR). The proposed system is comprised of the SVR model for suspended sediment concentration (SVR-SSC) and for total loads (SVR-Q_TL), respectively. SVR-SSC estimates SSC and SVR-Q_TL mimics the modified Einstein procedure. The grid search with K-fold cross validation (Grid-CV) and the recursive feature elimination (RFE) were employed to determine SVR's hyperparameters and input variables. The two SVR models showed reasonable cross-validation scores (R²) with 0.885 (SVR-SSC) and 0.860 (SVR-Q_TL). During the time-series sediment load monitoring period, we successfully detected various sediment transport phenomena in natural streams, such as hysteresis loops and sensitive sediment fluctuations. The newly proposed sediment monitoring system depends only on the gauged features by H-ADCP without additional assumptions in hydraulic variables (e.g., friction slope and suspended sediment size distribution). This method can be applied to any ADCP-installed discharge monitoring station economically and is expected to enhance temporal resolution in sediment monitoring.