| 摘要 |
Provided are methods (100) and systems (10) for determining both the location and angular orientation of holes (12) with openings (14) on a surface (16) of an article (18) that are at least partially obstructed. In a method of the present invention, a thermal imaging and scanning system (10) that includes an infrared camera (44), a heater (58), a laser spot projector (46), a laser spot sensor (48), a memory device (40) and a processor (42) is provided. A digital, infrared pixel image of an article (18) is acquired with the camera (44) while the article (18) is heated. Holes (12) with the least amount of obstruction are identified as candidate holes (12) for scanning. A laser beam (44) is projected onto the surface (16) of the article (18) in a region (24) containing at least one candidate hole (12) and the spot sensor (48) receives light reflections (52). A series of points (54) representing the scanned region (24) is stored as a point cloud (70) in the memory device (40). The point cloud (70) is then manipulated to calculate the location and angular orientation of each hole (12) in the region (24) in relation to one or more pre-existing, article datum (22). |
