Method and system for wear monitoring using RF reflections

• US 10,557,804 B2
• Filed: 10/11/2017
• Issued: 02/11/2020
• Est. Priority Date: 10/12/2016
• Status: Active Grant

• Current Assignee: REI Corporation
• Original Assignee: REI Corporation
• Inventors: Brunner, Daniel J., Richardson, Randy, Koontz, Robert, Schumacher, Alex, Schwoebel, Jeffrey J., Johnson, Randall
• Primary Examiner(s): Natalini, Jeff W
• Application Number:
  US15/730,465
• Publication Number:
  US 20180172605A1
• Time in Patent Office: 853 Days
• CPC Class Codes: B60C 11/243 Tread wear sensors, e.g. electronic sensors
• CPC Class Codes: B60C 11/246 Tread wear monitoring systems
• CPC Class Codes: B60C 23/06 Signalling devices actuated by deformation of the tyre , e.g. tyre mounted deformation sensors or indirect determination of tyre deformation based on wheel speed, wheel-centre to ground distance or inclination of wheel axle
• CPC Class Codes: B60C 25/007 outside surface measuring profile depth G01B11/22
• CPC Class Codes: B65G 43/00 Control devices, e.g. for safety, warning or fault-correcting
• CPC Class Codes: G01N 22/02 Investigating the presence of flaws

Abstract

In an embodiment, a system for wear monitoring, includes a wear surface, a metallic reflector embedded in the wear surface, a radio-wave transmitter, and a radio-wave receiver. The metallic reflector reflects radio waves transmitted by the radio-wave transmitter for detection by the radio wave receiver. Attenuation of the radio waves between transmission by the radio-wave transmitter and detection by the radio-wave receiver indicates a degree of wear of the wear surface.

Claims

1. A system for wear monitoring, comprising:

a moving non-metallic surface, the moving non-metallic surface comprising artifacts comprising joining or structural reinforcing metallic elements;

integrated metallic shapes embedded at pre-determined depths in the moving non-metallic surface;

stationary focused radio-wave transmitters positioned on a first side of the moving non-metallic surface and transmitting focused radio frequencies;

stationary focused radio-wave receivers positioned on a second opposite side of the moving non-metallic surface;

wherein the moving non-metallic surface, the artifacts, and the integrated metallic shapes produce a signature of the radio waves transmitted by the stationary focused radio-wave transmitters along an entire length and breadth of the non-metallic surface; and

wherein detection of the signature of the radio waves from the stationary focused radio-wave transmitters by the stationary focused radio-wave receivers is averaged over time to map a condition of the moving non-metallic surface to infer wear.

2. The system for wear monitoring of claim 1 wherein the stationary focused radio wave receivers detect the radio wave signatures of the integrated metallic shapes where the moving non-metallic surface is prone to wear to identify the degree of change in the size or the presence of the integrated metallic shapes over time and therefore the degree of wear of the moving non-metallic surface.

3. The system for wear monitoring of claim 1 wherein the integrated metallic shapes are embedded in the moving non-metallic surface in areas of the moving non-metallic surface that are not prone to wear for use as identification codes to a reference position and for tracking of at least one of changes in lateral position and excessive vibration, linear speed, damage, and stretch of the moving non-metallic surface.

4. The system for wear monitoring of claim 1 wherein the stationary focused radio wave receivers detect radio wave signatures of the artifacts for identification of reference position and for tracking of at least one of changes in lateral position, excessive vibration, linear speed, damage, and stretch of the moving non-metallic surface.

5. The system for wear monitoring of claim 1 wherein:

the stationary focused radio wave receivers detect attenuation of the focused radio waves through the moving non-metallic surface; and

a degree of change in the attenuation of the focused radio waves through the moving non-metallic surface over time is averaged to map the condition of the moving non-metallic surface to infer wear.

6. The system for wear monitoring of claim 1 wherein the stationary focused radio receivers do not detect any radio wave signatures from artifacts, the integrated metallic shapes, or the moving non-metallic surface, indicating that the moving non-metallic surface is at least one of separated, torn, or damaged.

7. The system for wear-monitoring of claim 1 wherein the integrated metallic shapes are at least one of parabolic, round, and rectilinear.

8. The system for wear-monitoring of claim 1 wherein the integrated metallic shapes are at least one of installed during a manufacturing process of the moving non-metallic surface, and installed at any time following the manufacturing process.

9. The system for wear-monitoring of claim 1 wherein the moving non-metallic surface is a conveyor belt.

10. The system for wear-monitoring of claim 1 wherein the moving non-metallic surface is a serpentine belt.

11. A system for wear monitoring, comprising:

a moving non-metallic surface, the moving non-metallic surface comprising artifacts comprising fabricated with joining or structural reinforcing metallic elements;

integrated metallic shapes embedded at pre-determined depths in the moving non-metallic surface;

stationary focused radio-wave transmitters positioned on a first side of the moving non-metallic surface and transmitting focused radio frequencies;

stationary focused radio-wave receivers positioned on the first side of the moving non-metallic surface;

wherein the moving non-metallic surface, the artifacts, and the integrated metallic shapes produce a signature of the radio waves transmitted by the stationary focused radio-wave transmitters along an entire length and breadth of the non-metallic surface; and

detection of the signature of the radio waves from the focused stationary radio-wave transmitters by the focused stationary radio-wave receivers is averaged over time and maps a condition of the moving non-metallic surface to infer wear.

12. The system for wear monitoring of claim 11 wherein the stationary focused radio wave receivers detect the radio wave signatures of the integrated metallic shapes where the moving non-metallic surface is prone to wear to identify the degree of change in the size or the presence of the integrated metallic shapes over time and therefore the degree of wear of the moving non-metallic surface.

13. The system for wear monitoring of claim 11 wherein the integrated metallic shapes are embedded in the moving non-metallic surface in areas of the moving non-metallic surface that are not prone to wear for use as identification codes to reference a position and for tracking of at least one of changes in lateral position and excessive vibration, linear speed, damage, and stretch of the moving non-metallic surface.

14. The system for wear monitoring of claim 11 wherein the stationary focused radio wave receivers detect radio wave signatures of the artifacts for identification of reference position and for tracking changes of at least one of lateral position, excessive vibration, linear speed, damage, and stretch of the moving non-metallic surface.

15. The system for wear monitoring of claim 11 wherein the stationary focused radio receivers do not detect any radio wave signatures from artifacts, the integrated metallic shapes, or of the moving non-metallic surface, indicating that the moving non-metallic surface is not physically present, is separated, torn, or damaged.

16. The system for wear-monitoring of claim 11 wherein the integrated metallic shapes are at least one of parabolic, round, and rectilinear.

17. The system for wear-monitoring of claim 11 wherein the integrated metallic shapes are at least one of installed during a manufacturing process of the moving non-metallic surface, and installed at any time following the manufacturing process.

18. The system for wear-monitoring of claim 11 wherein the moving non-metallic surface is a conveyor belt.

19. The system for wear-monitoring of claim 11 wherein the moving non-metallic surface is a serpentine belt.