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이준웅(J.W.Lee),장인수(I.S.Jang),강동중(D.J.Kang),권인소(I.S.Kweon) 한국자동차공학회 1997 한국자동차공학회 춘 추계 학술대회 논문집 Vol.1997 No.11_2
This paper presents an algorithm for road lane recognition. The algorithm composes of the estimation of 1D function of the histogram of gradient magnitude with respect to the image gradient direction by a recursive filter, determination of a band region as the search region for the road lane, construction of 10 function of the histogram of gradient magnitude of edge pixels in the band region, and recognition of road lane by the convolution of two functions. We also initially estimate the vanishing point and the location of road lane for host vehicle based on calibrated camera parameters. To prevent the failure of road lane: detection due to the disappearing of a lane mark and the lateral motion of host vehicle, this algorithm utilizes the recursive ftltering. The newly proposed approach provides the reliable detection of road lanes of natural outdoor scenes even in the presence of various noises.
벡터라이징을 이용한 자동부재배치 소프트웨어 개발에 관한 연구
노태정(T.J. Lho),강동중(D.J. Kang),김민성(M.S. Kim),박준영(J.Y. Park),박수웅(S.W. Park) 한국정밀공학회 2005 한국정밀공학회 학술발표대회 논문집 Vol.2005 No.10월
Among processes to manufacture parts from footwear materials like upper leathers, one of the most essential processes is the cutting one optimally arranging lots of parts on raw footwear materials and cutting. A new nesting strategy was proposed for the 2-dimensional part layout by using a two-stage approach, where which can be effectively used for water jet cutting. In the initial layout stage, a SOAL(Self-Organization Assisted Layout) based on the combination of FCM(Fuzzy C-Means) and SOM was adopted. In the layout improvement stage, SA(Simulated Annealing) based approach was adopted for a finer layout. The proposed approach saves much CPU time through a two-stage approach scheme, while other annealing-based algorithm so far reported for a nesting problem are computationally expensive. The proposed nesting approach uses the stochastic process, and has a much higher possibility to obtain a global solution than the deterministic searching technique. We developed the automatic nesting software of NST(ver.1.1) software for footwear industry by implementing of these proposed algorithms. The NST software was applied by the optimized automatic arrangement algorithm to cut without the loss of leathers, if possible, after detecting damage areas. Also, NST software can consider about several features in not only natural leathers but artificial ones. Lastly, the NST software can reduce a required time to implement generation of NC code, cutting time, and waste of raw materials because the NST software automatically performs parts arrangement, cutting paths generation and finally NC code generation, which are needed much effort and time to generate them manually.
Al-Insert 사출성형을 이용한 자동차 내장재 부품 개발에 관한 연구
노태정(T.J. Lho),김진영(J.Y. Kim),강동중(D.J. Kang),김종학(J.H.Kim),김기일(G.Y.Kim) 한국정밀공학회 2005 한국정밀공학회 학술발표대회 논문집 Vol.2005 No.10월
Generally, Aluminum is superior to durability, light, and characteristics of the material are embossed luminant. So, these characteristics of aluminum will be used automobile interior parts by aluminum injection moulding. Especially, The external of Aluminum plate is engraved differing pattern by roller working. This working can use any longer and be seen gracefully. This is the reason why aluminum insert moulding is used. This feature of research can be characterized by simple process to customize aluminum sheet of blanking and forming process with internal parts of configuration if products are injected by aluminum sheet. Besides, to analysis completed Automobile interior parts to be concerned volumetric shrinkage, best gate location, fill time analysis and so on through the mold-flow before the aluminum insert moulding is worked.