Localization is one of the most important problems in the automated inspection of sculptured objects. Localization is the process of determining the rigid-body translations and rotations that must be performed on a set of points measured on a manufactured surface (such as a turbine or propeller blade) to move those points into closest correspondence with the ideal design surface. An additional parameter is an offset distance such that the Euclidean motion brings the measured points as close as possible to an offset of the design surface.
We describe new algorithms for localization based on two different distance measures: Euclidean Distance and Tangent Plane Distance. The Euclidean distance algorithm provides more accurate results than previous methods while the tangent plane algorithm exhibits fast convergence.
Keywords: CMM, inspection, localization, manufacturing, tolerances, accuracy control
MIT Ocean Engineering Design Laboratory
Copyright © 1997, Massachusetts Institute of Technology
URL: http://deslab.mit.edu/DesignLab/abstracts96.html
Revised: July 23, 1997