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권은성(Eunsung Kwon),박기환(Kyihwan Park) 대한기계학회 2018 대한기계학회 춘추학술대회 Vol.2018 No.12
Non-ferrous metals cannot be magnetically sorted so they use color sorting or hand sorting. Therefore the sorting performance and recycling rate is low. To improve this, researches are being conducted to develop a device for automatic metal sorting system based on the laser induction technology, which is a chemical analysis method. For laser irradiation, the position of the metal on the conveyor must be known. For this task, we use triangulation method using line beam laser and camera. 3D shape can be obtained by triangulation method. In this shape measurement process, when the surface of the metal is highly curved, one metal can be recognized as two. Also, since the process of calculating the shape of actual metal goes frame-by-frame, an object may be divided into two frames therefore two positions can be calculated. For laser irradiation, only one position in one metal should be calculated. Therefore, in this study, we try to determine whether two or more positions are generated from one metal by calculating the distance between the positions of the calculated metal in each frame.