| 摘要 |
<p>The device (1) has a sleeve (4) with a partial cylindrical outer contour, and two measuring contacts (55, 57) for arrangement at inner wall of a borehole. A measuring unit (5) detects a relative position and/or a position change of the one of the contacts relative to the other contact. The measuring unit has a measuring component i.e. core (52) influencing another measuring component i.e. coil (51). The components are movable relative to each other and connected with the contacts by a connector, which is designed such that the components are movable parallel to the contacts.</p> |
