CMM with object location logic

• US 10,203,192 B2
• Filed: 05/27/2016
• Issued: 02/12/2019
• Est. Priority Date: 05/29/2015
• Status: Active Grant

• Current Assignee: Hexagon Metrology Incorporated (Hexagon AB)
• Original Assignee: Hexagon Metrology Incorporated (Hexagon AB)
• Inventors: Cobb, Zachary, Kocic, Milan
• Primary Examiner(s): Guadalupe, Yaritza
• Application Number:
  US15/166,877
• Publication Number:
  US 20160349034A1
• Time in Patent Office: 991 Days
• Field of Search: 33503
• CPC Class Codes: G01B 11/005 coordinate measuring machines
• CPC Class Codes: G01B 21/047 Accessories, e.g. for positioning, for tool-setting, for measuring probes
• CPC Class Codes: G01B 5/008 using coordinate measuring machines
• CPC Class Codes: G05B 2219/37193 Multicoordinate measuring system, machine, cmm

Abstract

A method and apparatus for measuring an object using a coordinate measuring machine locates the object using logic associated with the coordinate measurement machine. In response to locating the object, a controller directs a measuring device of the coordinate measuring machine to measure the object.

Claims

1. A method of measuring an object using a coordinate measuring machine having a measuring device to measure the object, the method comprising:

projecting temporary indicia relative to the measuring device, the indicia forming a prescribed region; and

positioning the object within the prescribed region of the temporary indicia;

after positioning the object, locating the object using object location logic associated with the coordinate measurement machine; and

in response to locating the object, directing the measuring device of the coordinate measuring machine to measure the object.

2. The method of measuring an object of claim 1, wherein the coordinate measuring machine includes a platform surface for supporting the object during measurement, and wherein projecting temporary indicia relative to the measuring device comprises projecting temporary indicia onto the platform surface, the indicia forming the prescribed region on the platform surface.

3. The method of measuring an object of claim 1, wherein the object location logic comprises a locator camera, and locating the object using object location logic comprises using the locator camera.

4. The method of measuring an object of claim 1, wherein the object location logic comprises a thermal sensor, and locating the object using object location logic comprises using the thermal sensor.

5. The method of measuring an object of claim 1, wherein the object location logic comprises an acoustic sensor, and locating the object using object location logic comprises using the acoustic sensor.

6. The method of measuring an object of claim 1, wherein directing a measuring device of the coordinate measuring machine to measure the object comprises automatically measuring the object.

7. The method of measuring an object of claim 6, wherein the coordinate measuring machine comprises a controller directing the measuring device of the coordinate measuring machine to measure the object.

8. The method of measuring an object of claim 1, wherein the measuring device comprises a measuring camera and wherein the measuring camera is distinct from the object location logic.

9. The method of measuring an object of claim 1, wherein the object has a surface with an object shape, and the prescribed region of the temporary indicia has a target shape that corresponds to the object shape of the object'"'"'s surface, such that positioning the object within the prescribed region of the temporary indicia comprises positioning the object surface within the prescribed region of the temporary indicia.

10. The method of measuring an object of claim 1, further comprising to identifying the object prior to beginning measurement using the object location logic.

11. A coordinate measuring machine, comprising:

a measuring device for measuring an object;

a projector for projecting a temporary indicia onto a portion of the coordinate measuring machine, the temporary indicia forming a prescribed region on a portion of the coordinate measuring machine; and

object location logic for locating the object; and

a controller for operating the measuring device to measure the object after the object is located by the object location logic.

12. The coordinate measuring machine of claim 11, wherein the coordinate measuring machine includes a platform surface for supporting the object during measurement, and wherein the projector is disposed to project the temporary indicia onto the platform surface.

13. The coordinate measuring machine of claim 11, wherein the object location logic comprises a camera.

14. The coordinate measuring machine of claim 11 wherein the measuring device comprises a measuring camera and wherein the measuring camera is distinct from the object location logic.

15. A coordinate measuring machine for measuring a work-piece, the coordinate measuring machine comprising:

a measuring sensor configured to measure a work-piece;

a projector configured to project a temporary indicia, the temporary indicia forming a prescribed region on a portion of the coordinate measuring machine; and

an object location camera having a field of view, the object location camera disposed such that the temporary indicia, and at least a portion of a work-piece positioned within the prescribed region of the temporary indicia, are within the camera'"'"'s field of view;

a controller operatively coupled to the object location camera and the measuring sensor, the controller operating the measuring sensor to measure the work-piece after the work-piece is located by the object location camera.

16. The coordinate measuring machine of claim 15, wherein the controller is configured identify the work-piece using the object location camera prior to operating the measuring sensor to measure the work-piece.

17. The coordinate measuring machine of claim 16, wherein the controller retrieves, from a memory, a pathway for operating the measuring sensor, the pathway determined as a function of identifying the work-piece.

18. The coordinate measuring machine of claim 15, wherein the coordinate measuring machine includes a platform surface for supporting the work-piece during measurement, and wherein the projector is disposed to project the temporary indicia onto the platform surface.

19. The coordinate measuring machine of claim 18, the temporary indicia forming a prescribed region on the platform surface, the prescribed region shaped to match at least one feature of the work-piece.

20. The coordinate measuring machine of claim 15, wherein the measuring sensor is a measuring camera, the measuring camera distinct from the object location camera.