BORE DIAMETER MEASURING DEVICE AND BORE DIAMETER MEASUREMENT METHOD

摘要

PROBLEM TO BE SOLVED: To propose a bore diameter measuring device and a bore diameter measurement method capable of simply measuring a bore diameter of a boring hole regardless of a natural ground situation and drilling precision of the boring hole.;SOLUTION: By utilizing a bore diameter measuring device 1 including light emitting means 2, a scale 3, and a camera 4, whole circumference of a boring wall of a boring hole B is irradiated with laser beams. The boring wall irradiated with laser beams and the scale 3 provided inside the boring hole B are photographed at a position of the boring wall. By utilizing the photographed image, dimensions of the boring wall are calculated based on a ratio of the scale 3 to the boring wall.;SELECTED DRAWING: Figure 1;COPYRIGHT: (C)2018,JPO&INPIT