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- W1997565267 abstract "Heating and cooling air for an aircraft interior is transported using metal ducts. These ducts vary in size from a few centimeters to 20 centimeters in diameter. In the assembly of aircraft components, a coupling is swaged onto the ducts. In assuring the mechanical dies are operating properly, the crimp mark is checked. The current method of visual inspection and checking with calipers does not allow implementation of statistical process control methods. In an effort to improve this process check, a new measurement method is being developed. A feasibility study indicated that a structured light laser system would be a good approach. A few requirements were: it must be portable to be used at different locations within the fabrication area, it must be fast, it should be easy to use by the mechanic/inspector, the readings must be accurate, and the system is non destructive. Due to the mechanical configuration of the tube and coupling, a camera with magnification optics is used. The measurement of the bump has a maximum of 50.8 microns (0.0020 inch). The system uses computer vision, and custom software written in C++. A low cost frame grabber is used. This paper shows the final production prototype system and its configuration for factory testing. This paper discusses the design and testing of the system.© (1997) COPYRIGHT SPIE--The International Society for Optical Engineering. Downloading of the abstract is permitted for personal use only." @default.
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- W1997565267 date "1997-12-10" @default.
- W1997565267 modified "2023-09-23" @default.
- W1997565267 title "<title>Crimped tool marks measurement using structured laser analysis: II</title>" @default.
- W1997565267 doi "https://doi.org/10.1117/12.294466" @default.
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