| 摘要 |
A device for measuring the shape of a three-dimensional object comprises a movable arm composed of a plurality of movable arm members and a probe coupled to a forward end of the movable arm by a universal joint. At each of the movable arm members and probe, there is provided an angle-of-rotation encoder for detecting the angle of rotation. In order to measure the shape of the three-dimensional object with a lesser number of measuring times, the probe has a flat surface portion at its forward end which contacts the object. A calculating section calculates the direction of the flat surface portion of the probe in contact with the object, on the basis of the information from the angle-of-rotation encoders and the known information on dimensions of the movable arm, to thereby determine a tangent plane of the object at a contact point between the flat surface portion and the object, and determines the shape of the object from a plurality of tangent planes at the contact points. |
