Apparatus, system and method for determining wear of an article

• US 6,359,690 B1
• Filed: 02/16/2000
• Issued: 03/19/2002
• Est. Priority Date: 10/28/1997
• Status: Expired due to Fees

• Current Assignee: Rockwell Automation Technologies Incorporated (Allen-Bradley Co., Inc.)
• Original Assignee: Reliance Electric Technologies LLC (ABB Limited)
• Inventors: Harris, James S., Discenzo, Frederick M.
• Primary Examiner(s): Font, Frank G.
• Assistant Examiner(s): LEE, HWA S
• Application Number:
  US09/504,440
• Time in Patent Office: 762 Days
• Field of Search: 356/450, 356/454, 356/477, 356/482, 356/498, 356/73.1, 73/7, 73/86, 250/227.14, 250/227.11, 250/358.1, 250/227.24
• US Class Current: 356/450
• CPC Class Codes: B60C 11/24 Wear-indicating arrangements
• CPC Class Codes: F16D 2066/001 Temperature
• CPC Class Codes: F16D 66/02 Apparatus for indicating wear
• CPC Class Codes: G01B 11/06 for measuring thickness ; e.g. of sheet material thickness measurement by thermal means G01B21/085
• CPC Class Codes: G01D 5/268 using optical fibres G01D5/28 - G01D5/38 take precedence
• CPC Class Codes: G01D 5/35312 using a Fabry Perot
• CPC Class Codes: G01M 11/086 Details about the embedment of the optical fiber within the DUT
• CPC Class Codes: H01R 39/58 Means structurally associated with the current collector for indicating condition thereof, e.g. for indicating brush wear
• CPC Class Codes: H02K 11/25 Devices for sensing temperature, or actuated thereby
• CPC Class Codes: H02K 11/35 Devices for recording or transmitting machine parameters, e.g. memory chips or radio transmitters for diagnosis
• CPC Class Codes: H02K 5/14 Means for supporting or protecting brushes or brush holders

Abstract

A system for determining wear of an article including an optical fiber for transmitting light from a light source. The optical fiber is embedded in the article, and operatively coupled to an interferometric system. The interferometric system is operatively coupled to a processor. The interferometric system provides the processor with information relating to wear of the optical fiber, and the processor determines wear of the article rate of wear and remaining useful life of the article based on the information relating to wear of the optical fiber.

Claims

1. A system for determining wear of an article, comprising:

an optical wave guide, at least a portion of the optical wave guide being integrated with the article, an end of the optical wave guide extending to a wearing portion of the article and wearing in conjunction therewith;

wherein the system determines wear of the article based upon determining wear of the optical wave guide.

2. The system of claim 1, wherein a length direction of the optical wave guide is substantially parallel to a direction of wear of the article.

3. The system of claim 1, further including an interferometric system for determining wear of the optical wave guide.

4. The system of claim 1, wherein the article is a carbon brush.

5. The system of claim 1, wherein the article is a tire.

6. The system of claim 1, wherein the article is a brake pad.

7. A system for determining wear of an article, comprising:

means for transmitting a light beam, said means for transmitting the light beam being at least partially integrated with the article, an end of the means for transmitting extending to a wearing portion of the article and wearing in conjunction therewith;

wherein the system determines wear of the article based upon determining wear of the means for transmitting a light beam.

8. The system of claim 7, wherein the article is a carbon brush.

9. The system of claim 7, wherein the article is a tire.

10. The system of claim 7, wherein the article is a brake pad.

11. A method for determining wear, comprising the steps of:

using an article having an optical wave guide at least partially integrated therewith such that an end of the optical wave guide extends to a wearing portion of the article and wears in conjunction therewith;

collecting information relating to wear of the optical wave guide; and

determining wear of the article based on the collected information.

12. The method of claim 11 further including the step of determining the rate of wear of the article based on the information.

13. A system for determining a condition of an object, comprising:

an optical fiber for transmitting a measuring light beam toward the object and for transmitting at least a portion of the measuring light beam reflected back from the object;

a signal monitor operatively coupled to the optical fiber and a processor, the signal monitor adapted to receive the reflected measuring light beam;

wherein the signal monitor provides the processor with information based on the reflected measuring, light beam, and the processor determines a condition of the object from the information.