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섬유 건조 공정에서의 에너지 절약에 관한 연구(I) -수학적 모델링-
김정학,이성철,Kim, Jeong-Hak,Lee, Seong-Cheol 한국섬유공학회 1996 한국섬유공학회지 Vol.33 No.9
In textile wet processes, we suggested a method to predict energy consumption in tenter frame drying through mathematical modeling. The variables which affected the energy consumption were also investigated through parametric study. Two models from different systems were introduced and then they were combined into a new model for better prediction power. The new model showed that the variables which influenced energy consumption were the temperature of air entering into tenter frame, the moisture contents of fabric, and the hunmidity of exhaust gas. The results showed that the parameters which were difficult to find through experiments were accurately predicted and the energy consumption was usefully predicted using this model.
김정학(Junghak Kim),김철희(Cheolhee Kim),김정한(Jeonghan Kim),이세헌(Sehun Rhee) 대한기계학회 2007 대한기계학회 춘추학술대회 Vol.2007 No.5
Welding process monitoring is advantageous for maintaining weld quality and numerous sensing techniques have been developed for laser welding. Coaxial image monitoring enables direct monitoring of the weld pool shape and keyhole behavior, but requires the complex optical system and the image processing technique. In this study, we coaxially acquired the weld pool images during laser lap welding by using the camera and special illumination. The welding characteristics ? pool width and length, keyhole shape, etc ? were extracted by using image processing and the relationship between these characteristics and the penetration depth were investigated.