Inner diameter measuring device

• US 9,410,795 B2
• Filed: 02/07/2013
• Issued: 08/09/2016
• Est. Priority Date: 02/09/2012
• Status: Active Grant

• Current Assignee: IHI Corporation
• Original Assignee: IHI Corporation
• Inventors: Fujimura, Kiyofumi, Baba, Michiko, Hasegawa, Kouzou, Hayashi, Toshihiro, Taga, Norimasa
• Primary Examiner(s): Chowdhury, Tarifur
• Assistant Examiner(s): AKANBI, ISIAKA O
• Application Number:
  US14/377,238
• Publication Number:
  US 20150015873A1
• Time in Patent Office: 1,279 Days
• Field of Search: 356/156, 356/630, 356/626
• US Class Current: 1/1
• CPC Class Codes: G01B 11/12 internal diameters
• CPC Class Codes: G01B 11/24 for measuring contours or curvatures
• CPC Class Codes: G01B 11/25 by projecting a pattern, e.g. one or more lines, moiré fringes on the object G01B11/255 takes precedence ; image analysis for depth or shape recovery G06T7/50
• CPC Class Codes: G01B 11/272 using photoelectric detection means
• CPC Class Codes: G01N 2021/9544 with emitter and receiver on the probe
• CPC Class Codes: G02B 23/2476 Non-optical details, e.g. housings, mountings, supports

Abstract

An inner diameter measuring device, comprising an image pickup unit (2) provided at a base end of a frame unit (6) and for picking up an image of a forward end side, a centering unit (4) provided at a forward end of the frame unit, a laser beam diffusing unit (5) provided on the centering unit and at a forward end side of the centering unit via a light transmitting window, a laser beam emitting unit (3) provided on a base end side of the centering unit, and a cone mirror (51) provided on the laser beam diffusing unit and having a conical reflection surface at a forward end, wherein a center line of the cone mirror coincides with an optical axis of the image pickup unit, and the centering unit is adapted to adjust a posture of the image pickup unit so that a laser beam (17) projected from the laser beam emitting unit enters a vertex of the cone mirror.

Claims

1. An inner diameter measuring device, comprising an image pickup unit provided at a base end of a frame unit and for picking up an image of a forward end side, a centering unit provided at a forward end of said frame unit, a laser beam diffusing unit provided on said centering unit and at a forward end side of said centering unit via a light transmitting window, a laser beam emitting unit positioned between said centering unit and said image pickup unit and provided on a base end side of said centering unit, and a cone mirror provided on said laser beam diffusing unit and having a conical reflection surface at a forward end,

wherein said centering unit has an adjusting mechanism unit comprising an X-axis slider slidable in a direction perpendicularly crossing said optical axis of said image pickup unit, a Y-axis slider disposed on said X-axis slider perpendicularly crossing said optical axis, and being slidable in a direction perpendicularly crossing a sliding direction of said X-axis slider, and has a mounting surface of a light emitting unit formed on said Y-axis slider, and said laser beam emitting unit is mounted on said mounting surface of said light emitting unit,

wherein under a condition where a center line of said cone mirror is coincident with said optical axis of said image pickup unit, an optical axis of said laser beam emitting unit is coincided with said center line of said cone mirror so that a laser beam projected from said laser beam emitting unit enters a vertex of said cone mirror.

2. An inner diameter measuring device according to claim 1, wherein said laser beam emitting unit is mounted on said mounting surface of said light emitting unit by three sets of pulling bolts and pushing bolts each disposed at three points and can adjust tilting of an optical axis of said laser beam emitting unit with respect to the center line of said cone mirror by adjusting said pulling bolts and said pushing bolts.

3. An inner diameter measuring device according to claim 1, wherein said centering unit is removably attached to said frame unit, said centering unit and said frame unit are mounted by engaging style, and by mounting on said frame unit, a center line of said centering unit is adapted to coincide with said optical axis of said image pickup unit.

4. An inner diameter measuring device according to claim 1, wherein said laser beam diffusing unit is mounted by engaging style on said centering unit, and by mounting said laser beam diffusing unit on said centering unit, said center line of said cone mirror is adapted to coincide with said center line of said centering unit.

5. An inner diameter measuring device according to claim 4, wherein said centering unit, said laser beam diffusing unit, and said laser beam emitting unit are integrated with each other, and under the condition that said optical axis of said laser beam emitting unit coincides with said center line of said cone mirror by said centering unit, said centering unit is mounted on said frame unit.

6. An inner diameter measuring device according to claim 1, wherein said centering unit, said laser beam diffusing unit, and said laser beam emitting unit are integrated with each other, and under the condition that said optical axis of said laser beam emitting unit coincides with said center line of said cone mirror by said centering unit, said centering unit is mounted on said frame unit.