| 摘要 |
<P>PROBLEM TO BE SOLVED: To accurately and reliably measure a hole axis direction of a boring hole. Ž<P>SOLUTION: The device with a casing to be inserted into a boring hole, and a displacement gage having a magnetism generating body and a plane sensor for detecting movement of the magnetism generating body is described as follows: the magnetism generating body is mounted on a free end of a rod-shaped body whose base end is supported on a prescribed position on the axis of the casing in the rockable state and in the cantilever state; the first follower part is arranged on the free end side of the rod-shaped body; the first follower part is arranged protrusively from the casing of the first contact ring on the first link member arranged radially from the rod-shaped body; the first link member biases the first contact ring to the radial direction outward of the casing, allows the first contact ring to follow a hole inner wall, and maintains a reference position of the magnetism generating body on the axial center position of the hole; and a reference position of the plane sensor is maintained on the center axis of the casing. Ž<P>COPYRIGHT: (C)2010,JPO&INPIT Ž
|
