| 摘要 |
<p>Non-linearly acting measuring apparatus for analysing and improving the adjustment of spherically acting orientation devices. The invention relates to a measuring apparatus for measuring small movements of a tool centre (17) of pivotable tools (16) relative to a spatially fixed frame plate (9). It is possible on the basis of the measurement results to improve the calibration of the pivotable tool (16) and thus the movement accuracy thereof. The invention comprises a measurement finger (1), which is moveable in the three axes of a spherical coordinate system and is connected, via a linear guide (3), to a boomerang-shaped transmission element (4), which is for its part connected, by way of a spherical joint (12), to the frame plate (9). Fixed to the boomerang-shaped transmission element (9) are three linearly acting linear measurement elements (6), (7), (8), which are connected, in a force-fitting manner and without play, to the frame plate (9) and the measurement finger (1), and the measurement results produced by said measurement elements uniquely describe the position of the measurement finger (1) relative to the frame plate (9) using a forward transformation. The pivotable tool (16) has, in its axis of symmetry, a positionally fixed measurement sphere (18), with which said tool engages in a dome-shaped formation (24) on the top side of the measurement finger (1) and forms a statically determinate, non-serial kinematic chain.</p> |
