METHOD FOR THE DETERMINATION OF THE 3D COORDINATES OF AN OBJECT

• US 20110007326A1
• Filed: 07/08/2010
• Published: 01/13/2011
• Est. Priority Date: 07/08/2009
• Status: Active Grant

• Current Assignee: Carl Zeiss Optotechnik GmbH (Carl-Zeiss-Stiftung)
• Original Assignee: Steinbichler Optotechnik GmbH (Carl-Zeiss-Stiftung)
• Inventors: Daxauer, Herbert, Mayer, Thomas, Thamm, Christian
• Granted Patent: US 8,502,991 B2
• Time in Patent Office: Days
• US Class Current: 356/620
• CPC Class Codes: G01B 11/002 for measuring two or more coordinates
• CPC Class Codes: G01B 21/045 Correction of measurements G01B9/02055 takes precedence

Abstract

A method serves for the determination of the 3D coordinates of an object (1). An improved method of this kind is characterized in that the object (1) is surrounded by a plurality of reference probes (2, 3, 4, 5, 6) having coded reference marks (7, 8); and in that a plurality of shorts (10) are taken of the object (1) such that a part of the object (1) and a part of a reference probe (2, 3) is in each case included thereon.

Claims

1. A method for the determination of the 3D coordinates of an object (1), wherein

the object (1) is surrounded by a plurality of reference probes (2, 3, 4, 5, 6) having coded reference marks (7, 8);

and

a plurality of shots (10, 11, 12, 13, 14) are taken of the object (1) such that a part of the object (1) and a part of a reference probe (2-6) are in each case included thereon.

2. A method in accordance with claim 1, wherein

some or all of the reference probes (2, 3, 6) are longer than the measurement field of the 3D sensor (9).

3. A method in accordance with claim 1, wherein some or all of the reference probes (2-6) are of bar shape.

4. A method in accordance with claim 1 wherein shots which include a part, in particular an end, of a reference probe (2-6), include a part, in particular an end, of a further reference probe (2-6).

5. A method in accordance with claim 1, wherein the reference marks (7, 8) are automatically decoded.

6. A method in accordance with claim 1, wherein some or all of the shots (10-14) are linked to one another by a 3D matching process.

7. A method in accordance with claim 1, wherein coded reference marks (7′

, 8′

) are also provided on the rear sides of some or all of the reference probes (2-6).

8. A method in accordance with claim 1, wherein the positions of the reference marks (7, 8) are detected and saved in a first measurement run.

9. A method in accordance with claim 1, wherein further measurement runs are carried out on the basis of stored positions of the reference marks (7, 8).

10. A method in accordance with claim 2, wherein some or all of the reference probes (2-6) are of bar shape.

11. A method in accordance with claim 10, wherein shots which include a part, in particular an end, of a reference probe (2-6), include a part, in particular an end, of a further reference probe (2-6).

12. A method in accordance with claim 2, wherein shots which include a part, in particular an end, of a reference probe (2-6), include a part, in particular an end, of a further reference probe (2-6).

13. A method in accordance with claim 3, wherein shots which include a part, in particular an end, of a reference probe (2-6), include a part, in particular an end, of a further reference probe (2-6).

14. A method in accordance with claim 13, wherein the reference marks (7, 8) are automatically decoded.

15. A method in accordance with claim 12, wherein the reference marks (7, 8) are automatically decoded.

16. A method in accordance with claim 11, wherein the reference marks (7, 8) are automatically decoded.

17. A method in accordance with claim 10, wherein the reference marks (7, 8) are automatically decoded.

18. A method in accordance with claim 4, wherein the reference marks (7, 8) are automatically decoded.

19. A method in accordance with claim 3, wherein the reference marks (7, 8) are automatically decoded.

20. A method in accordance with claim 2, wherein the reference marks (7, 8) are automatically decoded.