Method for measuring large components

Patent metadata

Field	Value
Publication number	US-9426425-B2
Application number	US-201414552004-A
Country	US
Kind code	B2
Filing date	Nov 24, 2014
Priority date	Nov 28, 2013
Publication date	Aug 23, 2016
Grant date	Aug 23, 2016

Abstract

A method for measuring large components, including providing a large component with markings on at least one outer surface at predefined and spaced-apart locations, providing a camera sensor system having at least one camera and one image analysis device for evaluating a camera image, wherein the position and orientation of the camera in relation to a reference point at a distance from the camera are determined, recording camera images of the individual markings using the camera and transmitting the camera images to the image analysis device, evaluating the camera images using the image analysis device, wherein the position of the individual markings in relation to the position of the camera is determined, and calculating the position of the markings in relation to the reference point from the position of the camera in relation to the reference point and the position of the markings in relation to the camera.

First claim

The invention claimed is:

1. A method for measuring large components, comprising:
providing a large component which has markings on at least one outer surface at a plurality of predefined and spaced-apart locations, wherein the markings have a predefined size and shape and are suitable for being precisely identified with regard to a position of the markings on the outer surface of the large component,
providing a camera sensor system having at least one camera and one image analysis device that is in data connection with the camera for evaluating a camera image recorded by the camera, wherein a position and orientation of the camera in relation to a reference point at a distance from the camera is determined,
recording camera images of the markings using the camera and transmitting the camera images to the image analysis device,
evaluating the camera images using the image analysis device, wherein a position of the markings in relation to the position of the camera is determined, and
calculating the position of the markings in relation to the reference point from the position of the camera in relation to the reference point and the position of the markings in relation to the camera,
wherein target positions for the markings are determined, the target positions being predefined in relation to the reference point, and the target positions are compared with measured positions of the markings.

2. The method according to claim 1 , wherein the position of the individual markings in relation to the position of the camera is determined, using a distance scale, from a comparison of the predefined size and/or shape of the markings and a size and/or shape of the markings shown on the camera image.

3. The method according to claim 1 , wherein the position of the individual markings in relation to the position of the camera is determined from a comparison of two camera images recorded from different positions, on the basis of a size and/or shape of the markings shown on the camera images.

4. The method according to claim 1 , wherein the camera is fitted on a section of a kinematics apparatus that is movable in relation to the reference point.

5. The method according to claim 4 , wherein the kinematics apparatus has a base section and a processing section which is movable in relation to the base section and on which the camera is fitted.

6. The method according to claim 5 , wherein a component clamping device is provided for holding the large component in a fixed or measured position in relation to the base section of the kinematics apparatus.

7. The method according to claim 5 , wherein the reference point is provided on the base section.

8. The method according to claim 4 , wherein a displacement and/or rotation of the large component relative to a target position of the large component is determined from deviations of the measured positions of the markings from the target positions, and
wherein coordinates of the displacement and/or rotation relative to the target position are transmitted to a control device of the kinematics apparatus.

9. The method according to claim 1 , wherein the target positions for the markings are aimed at when recording camera images of the markings.

10. The method according to claim 1 , wherein the markings comprise separate parts fastened to the outer surface of the large component.

11. The method according to claim 1 , wherein the markings are integral with the large component.

12. The method according to claim 11 , wherein the large component is formed from a plastic, and wherein the markings are introduced during a process of curing the plastic at a time of manufacture of the large component, by virtue of corresponding negative forms of the markings on a curing mold in which the large component cures.

13. The method according to claim 12 , wherein the markings are impressed into the outer surface of the large component or project from the outer surface as a result of an accumulation of resin.

14. The method according to claim 1 , wherein the markings are star-shaped or cross-shaped with four sections evenly spaced from one another and extending away from a central point.

Assignees

• Airbus Operations Gmbh

Inventors

• Vichniakov Alexei
• Schulz Andreas
• Tiemann Eckhard
• Looks Jan
• Schubert Uwe

Classifications

• G01B11/002 Primary

  for measuring two or more coordinates · CPC title

• H04N7/18 Primary

  Closed-circuit television [CCTV] systems, i.e. systems in which the video signal is not broadcast · CPC title

• G01B11/254

  Projection of a pattern, viewing through a pattern, e.g. moiré · CPC title

• G06K9/52

  Physics · mapped topic

• G06T7/004

  Physics · mapped topic