| 摘要 |
An apparatus and method for finding part position relations of parts of mechanical and opto-mechanical machining and quality control systems, and for recognizing these parts, is disclosed. The present invention relies on optical contactless sensing technology, with recording of optical fiducial patterns and therefrom determining positions close to the work positions without physical contact. Part positions of machines are determined by associating or mechanically integrating fiducial patterns (1) with key parts, and optically detecting the images of these patterns. Part positions and displacements according to given part position finder (6) strategies are found, by associating fiducial pattern images (14) and machine position data (17) to parts that are members of a part geometry relation (15), and under part displacement constraints (16), finding given part positions or displacements (18). Using fiducial patterns (1), identification and recognition of work pieces, work holders, work tools, gauge tools, and machine parts in general is enabled. |
| 主权项 |
1. A method for finding position relations of parts of a machine, said method comprising creating a first image and a second image of a fiducial pattern of a second machine part or creating a first image and a second image of a plurality of additional patterns of a second machine part, using an optical detector, fastened to a first machine part, receiving in a part position finder said pattern images from said optical detector, receiving part geometry relations, in said part position finder, said part geometry relations describing positional relations between the first machine part, the second machine part, the fiducial patterns, and a third machine part, and positional relations between the first, second and third machine parts and the optical detector, receiving in the part position finder a part displacement constraint, said part displacement constraint describing an allowed degree of freedom of displacement for at least one of said first, second and third machine parts and the optical detector, using said part position to determine a fiducial pattern image displacement between a first fiducial pattern image and a second fiducial pattern image or between a first fiducial pattern and a fiducial pattern image model, using said part position finder to modify, according to said part displacement constraint, at least one of said part geometry relations to determine a new machine part displacement that produces fiducial pattern image displacements corresponding to said determined fiducial pattern image displacements; and using a fiducial pattern cleaning device for cleaning said fiducial pattern by means of air blow, or blow of detergent agency followed by air blow. |
