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Tham khảo tài liệu 'understanding and applying machine vision part 3', kỹ thuật - công nghệ, cơ khí - chế tạo máy phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | Figure 4.23 Early system from Gould Electronics providing two-dimensional vision to guide robot for assembly operation. Figure 4.24 Early system from Machine Vision International provides correction to six degrees of freedom associated with position of car as it installs windshield. Page 61 TABLE 4.6 Machine Vision Robotic Related Manipulation of Separated Workplaces on Conveyors Bin Picking Manipulation of Manufacturing Process Assembly Workplaces lying Workpieces Finishing sealing In-process Stably on belt completely deburring Inspection Workplaces hung random spatial organization cutting process control flash Fastening spot on hooks partially Workplaces removal liquid gasketing welding riveting arc constrained highly organized and separated Workplaces partially organized spatially and unseparated Welding bolting screwing nailing gluing stapling Fitting parts presentation Mating of parts Several analyses of applications that have been conducted suggest that approximately 42 of the applications relate to inspection gaging cosmetic and verification 45 to visual servoing location analysis of which robot guidance is only one application and 13 to part identification and recognition. Significantly robot vision applications often require systems capable of inspection in addition to guidance. 4.4 Overview of Generic Machine Vision Benefits and Justification The opportunities for machine vision are largely in inspection and assembly operations. Even in the latter case many of the applications will involve inspection e.g. of tasks verification flaw detection and so on. In conjunction with such tasks people are only 70-85 effective especially when dealing with repetitive tasks. According to researchers at the University of Iowa people asked to perform the visual sorting task of picking out a minority of black Ping-Pong balls from a production line of white ones allowed 15 of the black balls to escape. Even two operators together were only about 95 effective. Page 62 People
