Patent ID: 9689655
Date: 2017-06-27
CPC Classifications: G01B

Claim:
1. A method for measuring a feature of an object, the method comprising: using a surface sensing measurement probe mounted on a coordinate positioning apparatus to measure at least the feature of the object and thereby acquire, based on feedback from the measurement probe, a representation of at least the feature that comprises multiple data points; fitting, by an analysis device, a model of at least the feature of the object to the representation, the model comprising parameters defining at least two independently alterable portions that each replicate a different region on the surface of the object and that are linked along a common edge so that a certain alteration of at least one of the at least two independently alterable portions causes a consequential alteration of another of the at least two independently alterable portions, the fitting comprising changing the form of the model by altering at least one of the at least two independently alterable portions; obtaining information regarding at least the feature from the fitted model; analyzing the information to determine deviations of at least the feature from a nominal feature; and providing an output based thereon.