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레이저를 이용한 캠 프로파일 정밀 측정 장치 개발에 관한 연구
임상헌(S. H. Lim),이춘만(C. M. Lee),정종윤(J. Y. Jung),윤상대(S. D. Yoon),신상훈(S. H. Shin),신성우(S. W. Shin),황영국(Y. K. Hwang) 한국정밀공학회 2006 한국정밀공학회 학술발표대회 논문집 Vol.2006 No.5월
Cam mechanisms are one of the most popular devices for generating irregular motion and are widely used in many industrial areas. The purpose of this study is the development of high precision measuring system for measurement data acquisition and analysis of a manufactured cam profile. The developed system is composed of servo motor, CNC controller, rotary encoder, and laser interferometer. And also, this system is non-contact measuring type. The developed system takes only 5 minutes to measure a cam profile and to analyze the measuring data while the CMM(coordinate measuring machine) takes about 1 hours even by a skilled operator.
자기 진단형 초정밀 렌즈 폴리싱기의 개발 및 성능 평가에 관한 연구
박수현(S. H. Park),임상헌(S. H. Lim),이춘만(C. M. Lee) 한국정밀공학회 2006 한국정밀공학회 학술발표대회 논문집 Vol.2006 No.5월
Spherical glass lenses are used in many optical industries. The curvature, eccentricity and height of a tool affect the surface roughness and curvature of lenses. The purpose of this study is the development and performance of a self-diagnostication ultra-precision lens polishing machine. In this paper, structure analysis is performed to reduce maximum displacement and to maintain outside the resonance region by CATIA V5. A spherical center setting gage is developed to increase accuracy of the manufactured lenses. The surface roughness, curvature and thickness of the manufactured lenses are measured and studied.
박수현(S. H. Park),임상헌(S. H. Lim),이춘만(C. M. Lee) 한국생산제조학회 2005 한국생산제조시스템학회 학술발표대회 논문집 Vol.2005 No.10
High precision manufacturing of spherical lenses is required for the development of optical system and display industries. Over the past few decades, many studies have been focused on the manufacturing of the spherical lenses. Spherical center setting of the lens polishing machine is a big problem to obtain high precision lenses. This study has been focused on the development of the spherical center setting gage for a lens polishing machine. And also, measurement of spherical center and eccentricity is performed using the developed gauge. The result of the measurement of the lens polishing machine is provided for the manufacturing of the spherical lens which have good shape and surface finish.
박수현(S. H. Park),임상헌(S. H. Lim),이춘만(C. M. Lee) 한국생산제조학회 2005 한국공작기계학회 추계학술대회논문집 Vol.2005 No.-
High precision manufacturing of spherical lenses is required for the development of optical system and display industries. Over the past few decades, many studies have been focused on the manufacturing of the spherical lenses. Spherical center setting of the lens polishing machine is a big problem to obtain high precision lenses. This study has been focused on the development of the spherical center setting gage for a lens polishing machine. And also, measurement of spherical center and eccentricity is performed using the developed gauge. The result of the measurement of the lens polishing machine is provided for the manufacturing of the spherical lens which have good shape and surface finish.
Residual Multi-dilated convolution U-Net을 이용한 다중 심장 영역 분할 알고리즘 연구
임상헌 ( Sang-heon Lim ),최한승 ( H. S. Choi ),배희진 ( S. K. Jung ),정서경 ( J. K. Jung ),정진교 ( Myung-suk Lee ),이명숙 한국정보처리학회 2019 한국정보처리학회 학술대회논문집 Vol.26 No.1
본 연구에서는 딥 러닝을 이용하여 완전 자동화된 다중 클래스 전체 심장 분할 알고리즘을 제안하였다. 제안된 방법은 recurrent convolutional block과 residual multi-dilated block을 삽입하여 기존 U-Net을 개선한 인공신경망 모델을 사용하였다. 평가는 자동화 분석 결과와 수동 평가를 비교하였다. 그 결과 96.88%의 평균 DSC, 95.60%의 정확도, 97.00%의 recall을 얻었다. 이 실험 결과는 제안된 방법이 다양한 심장 구조에서 효과적으로 구분되어 수행되었음을 알 수 있다. 본 연구에서 제안된 알고리즘이 의사와 방사선 의사가 영상을 판독하거나 임상 결정을 내리는데 보조적 역할을 할 것을 기대한다.
노영화(Y. H. Roh),임상헌(S. H. Lim),이춘만(C. M. Lee) 한국정밀공학회 2006 한국정밀공학회 학술발표대회 논문집 Vol.2006 No.5월
This study is concerned about the development of tower type automatic tool changer. The tower type automatic tool changer is developed to reduce stand-by time by shortening tool change time. The developed system can store more number of tools in small space. A structural analysis for the machine is carried out to check the machine design using commercial software, CATIA V5. In the result of structural analysis, the safety of the developed system is confirmed.