Abstract
ABSTRACTIn coordinate metrology, features of sheet metal parts in early production may be significantly out of nominal, so the inspection path created from its CAD nominal has to be adjusted to avoid cosine error or probe collisions. To solve this problem and seize the advantages of contact and non-contact measurement methods, a multi-sensor blue LED scanner and touch-trigger inspection system was constructed, in which the tactile inspection path was tuned by scanner data. Extrinsic calibration of the scanner was investigated using an angled slot target. Additionally, a lightweight 2-axis rotary table was designed for use with surfaces with non-vertical normal directions. The calibration, qualification, registration, and path correction methods are presented. A stamped sheet metal automobile part was experimentally measured.
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