Optical measuring device with a slider and optical measurement method

• US 9,279,669 B2
• Filed: 05/07/2013
• Issued: 03/08/2016
• Est. Priority Date: 05/08/2012
• Status: Active Grant

• Current Assignee: Airbus Operations GmbH (Airbus SE)
• Original Assignee: Airbus Operations GmbH (Airbus SE)
• Inventors: Klaas, Andrej
• Primary Examiner(s): Natnael, Paulos M
• Application Number:
  US13/888,536
• Publication Number:
  US 20130300862A1
• Time in Patent Office: 1,036 Days
• Field of Search: 348/47, 348/180, 348/187, 348/139, 356/601, 356/620, 248/168
• US Class Current: 1/1
• CPC Class Codes: G01B 11/24 for measuring contours or curvatures
• CPC Class Codes: G01C 11/06 by comparison of two or more pictures of the same area

Abstract

An optical measuring device for measuring a surface contour of an object, includes a tripod on which a camera platform is mounted, wherein on the camera platform at least two photo cameras are arranged for imaging the object comprising marking elements, and the at least two photo cameras are arranged on the camera platform in such a manner that imaging the object can be carried out from two different perspectives, wherein between the camera platform and the tripod a displacement device for the linear displacement of the camera platform in three directions that are independent of each other is arranged.

Claims

1. An optical measuring device for measuring a surface contour of an object, comprising:

a tripod;

a camera platform mounted on the tripod;

at least first and second photo cameras arranged on the camera platform for imaging the object comprising marking elements,

wherein the at least first and second photo cameras are arranged on the camera platform to carry out imaging the object from first and second different perspectives; and

a displacement device arranged between the platform and the tripod for the linear displacement of the camera platform in three directions independent of each other,

wherein the displacement device comprises first, second and third precision slide guides operating perpendicularly in relation to each other, wherein each of the first, second and third precision slide guides comprises a calibrated measuring system for measuring the displacement path.

2. The measuring device of claim 1, wherein the displacement device is configured to be moved in three directions perpendicular to each other and corresponding to the spatial axes.

4. The measuring device of claim 1, wherein the displacement device is an integral part of the measuring device.

5. The measuring device of claim 1, wherein the object to be measured is an aircraft component.

3. The measuring device of claim al, wherein the calibrated measuring system is at least one of a caliper gauge and a micrometer screw.

6. An optical measuring method for measuring a surface contour of an object by a measuring device,

wherein on a tripod a camera platform is mounted, and on the camera platform at least first and second photo cameras are arranged for imaging the object comprising marking elements,

wherein the at least first and second photo cameras are arranged on the camera platform in such a manner that imaging the object can be carried out from two different perspectives,

wherein prior to each measuring process, calibration of the optical measuring device is carried out, taking into account the precise measuring conditions, to determine the measuring uncertainty at each measuring point and to provide proof of calibration traceable to calibration standards,

wherein the camera platform is moved, by a displacement device arranged between the tripod and the camera platform, with first, second and third precision slide guides operating perpendicularly in relation to each other in three perpendicular directions corresponding to the spatial axes, and

wherein images of the object to be measured are taken at commencement of measuring and after each travel path covered.

7. The measuring method of claim 6, wherein prior to each measuring process the at least first and second photo cameras are arranged relative to each other and to the object to be measured, wherein the object to be measured is marked by means of marking elements.

8. The measuring method of claim 6, wherein during calibration of the optical measuring device each of the first, second and third precision slide guides is displaced in several increments up to a displacement width, corresponding to the maximum object deformation to be measured, of the object to be measured.