Transprojection of geometry data

• US 9,734,609 B2
• Filed: 06/26/2014
• Issued: 08/15/2017
• Est. Priority Date: 01/14/2004
• Status: Expired due to Fees

• Current Assignee: Hexagon Metrology Incorporated (Hexagon AB)
• Original Assignee: Hexagon Metrology Incorporated (Hexagon AB)
• Inventors: Pulla, Sandeep, Eaton, Homer
• Primary Examiner(s): Bella, Matthew
• Assistant Examiner(s): TORRES, JOSE
• Application Number:
  US14/316,207
• Publication Number:
  US 20140375693A1
• Time in Patent Office: 1,146 Days
• Field of Search: None
• CPC Class Codes: G01B 21/02 for measuring length, width, or thickness G01B21/10 takes precedence
• CPC Class Codes: G01B 21/04 by measuring coordinates of points
• CPC Class Codes: G01B 9/02023 Indirect probing of object, e.g. via influence on cavity or fibre
• CPC Class Codes: G01B 9/02029 Combination with non-interferometric systems, i.e. for measuring the object
• CPC Class Codes: G01B 9/0203 With imaging systems
• CPC Class Codes: G01B 9/02031 With non-optical systems, e.g. tactile
• CPC Class Codes: G01B 9/0205 of probe head
• CPC Class Codes: G06T 11/60 Editing figures and text; Combining figures or text
• CPC Class Codes: G06T 2207/20221 Image fusion; Image merging
• CPC Class Codes: G06T 7/73 using feature-based methods

Abstract

Systems and methods for transprojection of geometry data acquired by a coordinate measuring machine (CMM). The CMM acquires geometry data corresponding to 3D coordinate measurements collected by a measuring probe that are transformed into scaled 2D data that is transprojected upon various digital object image views captured by a camera. The transprojection process can utilize stored image and coordinate information or perform live transprojection viewing capabilities in both still image and video modes.

Claims

1. A system for coordinate measurement and visual overlay, comprising:

an articulated arm coordinate measuring machine comprising a base, a plurality of segments hingedly connected with a plurality of rotational transfer housings, and a contact probe at an end of the articulated arm coordinate measuring machine, the articulated arm coordinate measuring machine being configured to measure a position of an object contacted by the contact probe;

an imaging member disposed on the articulated arm coordinate measuring machine near the probe in such a manner that the probe is not in the field of view of the imaging member;

a memory configured to store preacquired geometry information; and

at least one module configured to use positions measured with the contact probe to associate coordinate systems of images captured by the imaging member with the preacquired geometry information, perform a transformation operation on the preacquired geometry information to map the preacquired geometry information to the captured images, and overlay said preacquired geometry information over the captured images.

2. The system of claim 1, wherein the contact probe comprises a probe selected from the group consisting of:

a probe that uses a strain gauge for contact detection, a probe that uses a pressure sensor for contact detection, and a probe configured to be electrostatically-responsive.

3. The system of claim 1, wherein the imaging member comprises a camera capable of generating still images and video images.

4. The system of claim 1, wherein the imaging member comprises an imaging device selected from the group consisting of:

X-ray imaging devices, ultrasonic imaging devices, laser imaging devices, infrared imaging devices, optical imaging devices, and digital imaging devices.

5. The system of claim 1, wherein the imaging member comprises two or more cameras.

6. The system of claim 1, wherein the captured images can be used to form a 3D image.

7. The system of claim 1, wherein the preacquired geometry information comprises calibration information regarding the relative positions of the contact probe and the imaging member.

8. The system of claim 1, wherein the preacquired geometry information comprises positions measured with the contact probe.

9. A method for coordinate measurement and visual overlay comprising:

measuring a plurality of positions with a contact probe mounted on an articulated arm coordinate measuring machine comprising a base, a plurality of segments hingedly connected with a plurality of rotational transfer housings, and the contact probe mounted at an end of the articulated arm coordinate measuring machine;

capturing a plurality of images with an imaging member disposed on the articulated arm coordinate measuring machine near the probe in such a manner that the probe is not in the field of view of the imaging member;

associating coordinate systems of the images with preacquired geometry information;

performing a transformation operation on the preacquired geometry information to map the preacquired geometry information to the images; and

overlaying the preacquired geometry information over the images.

10. The method of claim 9, wherein the contact probe comprises a probe selected from the group consisting of:

a probe that uses a strain gauge for contact detection, a probe that uses a pressure sensor for contact detection, and a probe configured to be electrostatically-responsive.

11. The method of claim 9, wherein the imaging member comprises a camera capable of generating still images and video images.

12. The method of claim 9, wherein the imaging member comprises an imaging device selected from the group consisting of:

X-ray imaging devices, ultrasonic imaging devices, laser imaging devices, infrared imaging devices, optical imaging devices, and digital imaging devices.

13. The method of claim 9, wherein the imaging member comprises two or more cameras.

14. The method of claim 9, wherein capturing a plurality of images comprises capturing 3D images.

15. The method of claim 9, wherein the preacquired geometry information comprises calibration information regarding the relative positions of the contact probe and the imaging member.

16. The method of claim 9, wherein the preacquired geometry information comprises positions measured with the contact probe.

17. A system for coordinate measurement and visual overlay, comprising:

a coordinate measuring machine comprising a contact probe configured to measure a position of an object contacted by the contact probe;

an imaging member disposed on the coordinate measuring machine near the probe in such a manner that the field of view of the imaging member is substantially unobstructed by the probe;

a memory configured to store preacquired geometry information; and

at least one module configured to use positions measured with the contact probe to associate coordinate systems of images captured by the imaging member with the preacquired geometry information, perform a transformation operation on the preacquired geometry information to map the preacquired geometry information to the captured images, and overlay said preacquired geometry information over the captured images.