DISTORTION EVALUATING APPARATUS AND DISTORTION EVALUATING METHOD

A distortion evaluating apparatus which can quantitatively evaluate distortion in a measurement object surface is provided. A distortion evaluating apparatus evaluates distortion based on three-dimensional measurement data obtained from a measurement object surface. The apparatus includes a secondar...

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Bibliographische Detailangaben
Hauptverfasser:	KATSUMA HIDETO, TACHI YOICHI, IKEDA KOTARO, NAKASAKU SHINYA, OUE SEIJI
Format:	Patent
Sprache:	eng
Schlagworte:	CALCULATING COMPUTING COUNTING ELECTRIC DIGITAL DATA PROCESSING IMAGE DATA PROCESSING OR GENERATION, IN GENERAL INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS MEASURING MEASURING ANGLES MEASURING AREAS MEASURING IRREGULARITIES OF SURFACES OR CONTOURS MEASURING LENGTH, THICKNESS OR SIMILAR LINEARDIMENSIONS MOTOR VEHICLES PERFORMING OPERATIONS PHYSICS TESTING TRAILERS TRANSPORTING
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Beschreibung
Zusammenfassung:	A distortion evaluating apparatus which can quantitatively evaluate distortion in a measurement object surface is provided. A distortion evaluating apparatus evaluates distortion based on three-dimensional measurement data obtained from a measurement object surface. The apparatus includes a secondary differential component adapted for effecting a secondary differential operation on two-dimensional measurement data of a cross section of the measurement object surface indicative of unevenness therein, thus obtaining curvature data of the cross section, a permissible range setting component adapted for setting a permissible range for the curvature data, based on range of an upper limit value and a lower limit value from a reference value, and a distortion data extracting component adapted for extracting a portion of the curvature data exceeding the set permissible range as distortion data indicative of the distortion in the cross section.