| 摘要 |
A dimensional measurement apparatus is further calibrated in order to improve an initial error map or error function of the apparatus. A calibrated production workpiece (14) is measured on the apparatus (10), and the measurements are compared (44,90) with calibrated values to produce error values. One or more updated error maps or functions are produced (46,92) from combinations of some or all of these error values with all or part of the initial error map or function. Then it is determined (48,94) whether an updated map or function produces better correction, and if so it is selected for future measurements. By selecting an error map or function which is based on a combination of new and existing error values, and which has been determined to give better correction, the improved map or function is learned intelligently during the course of normal production measurements. |
