OPTICAL-BASED TREAD DEPTH MEASURING DEVICE, SYSTEM, AND METHOD

• US 20170349007A1
• Filed: 10/22/2015
• Published: 12/07/2017
• Est. Priority Date: 12/16/2014
• Status: Abandoned Application

• Current Assignee: Bridgestone Americas Tire Operations LLC (Bridgestone Corporation)
• Original Assignee: Bridgestone Americas Tire Operations LLC (Bridgestone Corporation)
• Inventors: WEI, Terence E.
• Application Number:
  US15/535,634
• Publication Number:
  US 20170349007A1
• Time in Patent Office: Days
• CPC Class Codes: B60C 11/246 Tread wear monitoring systems
• CPC Class Codes: G01B 11/22 for measuring depth
• CPC Class Codes: G01M 17/027 using light, e.g. infrared, ultraviolet or holographic techniques

Abstract

A device, system, and method for optically measuring the tread depth of a tire mounted on a vehicle, wherein at least one of a camera, a processor, and an onboard computer may be configured to determine the tread depth from images of the tire tread. Tread depth may be measured when the vehicle is either stationary or moving. Tread depth may be measured either manually by a vehicle operator or automatically by the optical-based tread depth measuring system.

Claims

1. A tire tread depth measuring device, comprising:

at least one camera configured to capture images of a tire tread surface; and

at least one processor operatively connected to the camera,

wherein the processor is configured to receive, interpret, and transmit a signal from the camera and determine a depth measurement of the tire tread surface, and

wherein the at least one of the camera and the processor is operative connected to a vehicle.

2. The tire tread depth measuring device of claim 1, wherein the camera is at least one of:

a digital camera, a video camera, a thermographic camera, an ultraviolet camera, and a radiographic camera.

3. The tire tread depth measuring device of claim 1, wherein the at least one camera includes two cameras configured to capture stereographic images.

4. The tire tread depth measuring device of claim 1, further comprising at least one of:

a wireless transmitter, a wireless receiver, and a wireless transceiver.

5. The tire tread depth measuring device of claim 1, wherein the tread depth measuring device is configured to measure tread depth while the vehicle is either stationary or moving.

6. A tire tread depth measuring system, comprising:

a vehicle having an onboard computer;

at least one tire having a tread surface, wherein the at least one tire is mounted to the vehicle;

at least one camera, wherein the at least one camera is oriented to have an unobstructed line of sight to the tire tread surface; and

at least one processor operatively connected to at least one of the camera and the onboard computer,

wherein the processor is configured to receive and interpret a signal from the camera, determine a depth measurement of the tread surface, and transmit the depth measurement to the onboard computer.

7. The tire tread depth measuring system of claim 6, further comprising a camera protection device,

wherein the camera protection device is configured to at least one of clean and protect the camera,

wherein the camera protection device comprises at least one of:

a shield, a cover, a wiper, a screen, a film, a fluid, a reservoir, a pressurization device, a nozzle, a tube, a recess, a shutter, and a door.

8. The tire tread depth measuring system of claim 6, wherein the camera is at least one of:

a digital camera, a video camera, a thermographic camera, an ultraviolet camera, and a radiographic camera.

9. The tire tread depth measuring system of claim 6, wherein the at least one camera includes two cameras configured to capture stereographic images.

10. The tire tread depth measuring system of claim 6, further comprising at least one of:

a wireless transmitter, a wireless receiver, and a wireless transceiver.

11. The tire tread depth measuring system of claim 6, wherein at least one of the camera and the processor are operatively connected to a vehicle.

12. A tire tread depth measuring method, comprising:

capturing with at least one camera at least one image of a tread surface;

determining from the image at least two reference tread surface points,

wherein at least one of the reference tread surface points is oriented on a high tread portion, and

wherein at least one of the reference tread surface points is oriented on a low tread portion; and

measuring a difference in tread depth between the reference tread surface points,

wherein at least one of the step of determining two reference points and the step of measuring a difference in tread depth is performed by a processor, and

wherein the measured difference in tread depth is transmitted to a vehicle having an onboard computer.

13. The tire tread depth measuring method of claim 12, wherein the method is performed on a stationary vehicle.

14. The tire tread depth measuring method of claim 12, wherein the method is performed on a moving vehicle.

15. The tire tread depth measuring method of claim 16, wherein the method is initiated automatically by at least one of:

the camera, the processor, and the vehicle having an onboard computer.

16. The tire tread depth measuring device of claim 1, wherein the processor and the camera are operatively interconnected by at least one of:

a wire, a circuit trace, and a wireless transmission.

17. The tire tread depth measuring device of claim 1, wherein at least one of the camera and the processor is operatively connected to the vehicle by at least one of:

a bolt, a screw, a nut, a bracket, a hook, a weld, a magnet, and an adhesive.

18. The tire tread depth measuring system of claim 6, wherein at least one of the camera, the processor, and the onboard computer are operatively interconnected by at least one of:

a wire, a circuit trace, and a wireless transmission.

19. The tire tread depth measuring system of claim 11, wherein at least one of the camera and the processor are operatively connected to the vehicle by at least one of:

a bolt, a screw, a nut, a bracket, a hook, a weld, a magnet, and an adhesive.

20. The tire tread depth measuring method of claim 12, wherein the method is initiated manually by a vehicle operator.