PROCEDURE AND DEVICE FOR VISUAL CONTROL AND MEASUREMENT DIFFERENT FROM A VISUAL DRILL AND SET OF VISUAL DRILLING AND MEASUREMENT OF DRILLS SUCH AS THE GUIDE OF A GUIDE TUBE OF A PRESSURE NUCLEAR WATER REACTOR.

摘要

Remote visual control and measurement procedure of a drill (2), characterized in that: - a light source (12) and a mask (15) are placed face to face inside the drill (2) to produce a parallel beam to the face (15a) of the mask (15), arranged in front of said light source (12) and to generate a plane of light that creates a circumferential lighting of the inner wall (2a) of the hole (2), said mask having (25) the shape and dimensions that correspond substantially to the shape and dimensions of this hole (2), and - at least one image of the inner wall (2a) illuminated by the circumferential lighting is recorded by means of a chamber ( 16) arranged in front of the mask (15) and whose visual field is directed towards the circumferential lighting and whose optical axis is substantially centered on the longitudinal axis of the hole (2).