Artifacts, Methods of Creating Such Artifacts and Methods of using Such Artifacts

• US 20090163390A1
• Filed: 12/21/2007
• Published: 06/25/2009
• Est. Priority Date: 12/21/2007
• Status: Active Grant

• Current Assignee: Rtx Corporation
• Original Assignee: United Technologies Corporation (Rtx Corporation)
• Inventors: Pearson, Jeffry K., Joyner, Randall W., Boyer, Jesse R.
• Granted Patent: US 8,105,651 B2
• Time in Patent Office: Days
• US Class Current: 508/110
• CPC Class Codes: C10M 171/00 Lubricating compositions characterised by purely physical criteria, e.g. containing as base-material, thickener or additive, ingredients which are characterised exclusively by their numerically specified physical properties, i.e. containing ingredients which are physically well-defined but for which the chemical nature is either unspecified or only very vaguely indicated chemically defined ingredients C10M101/00 - C10M169/00; petroleum fractions C10M101/02, C10M121/02, C10M159/04
• CPC Class Codes: C10M 2201/041 Carbon; Graphite; Carbon black
• CPC Class Codes: C10M 2201/066 Molybdenum sulfide
• CPC Class Codes: C10M 2213/062 Polytetrafluoroethylene [PTFE]
• CPC Class Codes: C10N 2050/023 Multi-layer lubricant coatings
• CPC Class Codes: C10N 2050/025 in the form of films or sheets
• CPC Class Codes: G01B 1/00 Measuring instruments characterised by the selection of material therefor
• CPC Class Codes: G01B 21/042 Calibration or calibration artifacts G01B3/30, G01B9/02072 take precedence

Abstract

Artifacts, methods of creating such artifacts and methods of using such artifacts are provided. In this regard, an exemplary embodiment of a method for creating an artifact for quantifying measurement accuracy of non-contact sensors included in optical three-dimensional (3-D) measuring systems, comprises: fabricating an artifact using a base material; and coating the artifact with an approximately uniform coating of dry film lubricant.

Claims

1. A method of creating an artifact for quantifying measurement accuracy of non-contact sensors included in optical three-dimensional (3-D) measuring systems, comprising:

fabricating an artifact using a base material; and

coating the artifact with an approximately uniform coating of dry film lubricant.

2. The method of claim 1, wherein the base material comprises at least one of steel, nickel, and titanium.

3. The method of claim 1, wherein the dry film lubricant is a thermally cured dry film lubricant.

4. The method of claim 1, wherein the dry film lubricant comprises at least one of molybdenum disulphide (MoS2), graphite, MoS2/graphite, polytetrafluoroethylene (PTFE), and PTFE/MoS2 based dry film lubricant.

5. The method of claim 1, wherein the artifact complies with VDI/VDE standard 2634—

Part 2.

6. The method of claim 1, wherein the step of coating the artifact with an approximately uniform coating of dry film lubricant includes the steps of:

lapping the artifact;

grit blasting the artifact with an abrasive blasting media;

heating the artifact to a predetermined temperature;

spraying the artifact with a dry film lubricant; and

baking the artifact and dry film lubricant at a predetermined temperature for a predetermined time period.

7. The method of claim 6, wherein the artifact is lapped to approximately 0.00003 of an inch and grit blasted with 400 grit aluminum.

8. The method of claim 6, wherein the artifact is heated to approximately 180 degrees Fahrenheit and sprayed with the dry film lubricant.

9. The method of claim 6, wherein the artifact and dry film lubricant are baked at approximately 250-400 degrees Fahrenheit for approximately 2-4 hours.

10. A method for quantifying measurement accuracy of non-contact sensors comprising:

fabricating an artifact using a base material;

coating the artifact with an approximately uniform coating of dry film lubricant such that reflective noise generated when the artifact is scanned by an optical three-dimensional measuring system is reduced; and

scanning the artifact using an optical three-dimensional (3-D) measuring system.

11. The method of claim 10, wherein in scanning the artifact, the artifact is used to quantify flatness measurement accuracy of a non-contact sensor in the optical 3-D measuring system.

12. The method of claim 10, wherein the scanning is performed by an Advanced Topometric Sensor (ATOS).

13. An artifact for quantifying measurement accuracy of non-contact sensors in optical 3-D measuring systems, comprising:

an artifact body; and

an approximately uniform coating of dry film lubricant bonded to the artifact body.

14. The artifact of claim 13, wherein the artifact body has a non-specular inspection surface.

15. The artifact of claim 13, wherein the artifact complies with VDI/VDE standard 2634—

Part 2.

16. The artifact of claim 13, wherein the artifact body includes a pair of artifact parts connected together using a series of pins.

17. The artifact of claim 13, wherein the approximately uniform coating of dry film lubricant has a thickness that does not vary by more than approximately 0.0003 inches.

18. The artifact of claim 13, wherein the dry film lubricant reduces reflective noise when the artifact is scanned by an optical 3-D measuring system.