| 摘要 |
The invention relates to a coordinate measuring device for measuring workpieces ( 7 ). Said device comprises at least one scanning pin ( 12 ) which can be fixed to a scanning head ( 5 ) which can be displaced in the direction of the coordinates (x, y, z). Said scanning pin or scanning pins ( 12 ) comprise shanks ( 14 a to 14 c) to which ends a scanning body ( 13 a to 13 c) is fixed, at least two of said scanning shanks being differently oriented when the scanning pin ( 12 ) or pins concerned are conventionally fixed to the scanning head ( 5 ). The inventive device also comprises a control and evaluation unit ( 9 ) for controlling the course of measurement and for evaluating the measuring points thus recorded. In order to determine in an automated manner at least one suitable scanning shank ( 14 a to 14 e) for measuring a geometric element on a workpiece, the control and evaluation unit ( 9 ) can carry out the following method: at least one characteristic piece of directional information (n<SUB>i</SUB>) is determined for the points to be measured of a geometric element ( 29 to 32 ) to be measured on the workpiece ( 7, 15, 16 ), either on the basis of the measured measuring points (P<SUB>1 </SUB>to P<SUB>4</SUB>) or according to predefined nominal data of the geometric element; and at least one scanning shank ( 14 a to 14 c) suitable for measuring the measuring points of the geometric element is determined from the cited directional information (n<SUB>i</SUB>).
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