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Volume 17 - Nondestructive Evaluation and Quality Control Part 2

Tham khảo tài liệu 'volume 17 - nondestructive evaluation and quality control part 2', kỹ thuật - công nghệ, cơ khí - chế tạo máy phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | Fig. 20 Robot gripper arm used to maneuver and orient an aluminum aircraft section with the aid of a video camera that helps it see the workpiece and then identifies it from a data base. Courtesy of Lockheed-California Company Additional Applications As machine vision technology evolves and becomes more widely used within industry additional applications are beginning to emerge. Many of these applications represent special-purpose equipment that has been designed to satisfy a particular need while others combine two or more of the previously mentioned functions visual inspection part identification and guidance and control . For example the system shown in Fig. 21 can inspect as well as sort various fasteners and similar multiple-diameter parts. Still other applications reflect machine vision systems that are incorporated into other equipment. Fig. 21 Noncontact digital computer-vision-based fastener inspection system used to gage and then sort parts. Unit measures 11 parameters for up to 24 different fasteners that are stored in a memory and is capable of sorting up to 180 parts per minute or over 10 000 parts per hour. Courtesy of Diffracto Limited Special-Purpose Systems. In the future special-purpose systems are likely to represent a large if not the largest use of machine vision technology. One of the best examples of this type of system is equipment for inspecting PCBs. A number of companies have either developed or are in the process of developing such systems which are expected to be widely used by the end of the decade. Similar special-purpose equipment is entering the market for the inspection of thick-film substrates and circuits surface-mounted devices and photolithographic artwork. Embedded Technology. In the embedded technology are one of the major uses of machine vision is mask alignment for the production of microelectronic devices. Similarly vision technology is also becoming widely used for controlling other microelectronic fabrication equipment .