| 摘要 |
The device has a pneumatic measuring rod (11) insertable into a borehole (19). The measuring rod is arranged in a housing (25) with an outlet opening (27) whose diameter is larger than diameter of the rod. The rod is extended wide such that the rod engages into the borehole for measuring the borehole. A light source (29), a camera (31) and light conductors (33, 35) are provided for determining the position of the borehole relative to the housing and/or the rod or vice versa. A O-ring is provided around the opening of the housing as a seal, and a handle is provided at the housing. |
