| 摘要 |
A pivoting cable extension arm ( 2 ) has a pivot sensor ( 3 ). The extension arm is mounted on a swivel frame ( 4 ) having a swivel sensor ( 5 ). The swivel frame has two tangent sheaves ( 4 A, 4 C) that allow a wide pivot range of the extension arm. A cable take-up drum ( 6 ) has a range sensor ( 7 ) for sensing the length of cable ( 1 ) extending from the drum. The three-sensors ( 3, 5, 7 ) provide data for computing 3D coordinates of the end of the cable ( 1 ) over a wide range of space surrounding the assembly. This allows an object to be measured and modeled in three dimensions by touching the cable end to points on the object and acquiring spatial coordinates of the points.
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