SYSTEMS AND METHODS FOR MONITORING VEHICLE WHEEL ASSEMBLY

• US 20130278771A1
• Filed: 05/10/2013
• Published: 10/24/2013
• Est. Priority Date: 06/10/2011
• Status: Abandoned Application

• Current Assignee: FLIR Systems, Inc. (Teledyne Technologies Incorporated)
• Original Assignee: FLIR Systems, Inc. (Teledyne Technologies Incorporated)
• Inventors: Richardson, Patrick B., Hgasten, Nicholas, Hoelter, Theodore R., Strandemar, Katrin, Magoun, Carleton M., Risdall, David M., Jepson, Shawn, James, Jay B., Distelzweig, John H.
• Application Number:
  US13/892,202
• Publication Number:
  US 20130278771A1
• Time in Patent Office: Days
• US Class Current: 348/148
• CPC Class Codes: B60C 11/246 Tread wear monitoring systems
• CPC Class Codes: B60C 23/068 by monitoring chassis to tyre distance
• CPC Class Codes: H04N 23/55 Optical parts specially adapted for electronic image sensors; Mounting thereof
• CPC Class Codes: H04N 23/667 Camera operation mode switching, e.g. between still and video, sport and normal or high- and low-resolution modes
• CPC Class Codes: H04N 5/33 Transforming infrared radiation cameras or camera modules for generating image signals from infrared radiation H04N23/20; circuitry of SSIS for transforming infrared radiation into image signals H04N25/20

Abstract

Various techniques are disclosed for systems and methods using small form factor infrared imaging modules to monitor various components of a vehicle wheel assembly. For example, a vehicle-mounted system may include one or more infrared imaging modules, a processor, a memory, a display, a communication module, and a vehicle speed sensor. The vehicle-mounted system may be mounted on, installed in, or otherwise integrated into a vehicle that has one or more wheel assemblies. The one or more infrared imaging modules may be configured to capture thermal images of desired portions of the wheel assemblies. Various thermal image analytics and profiling may be performed on the captured thermal images to determine the operating condition of various components of the wheel assemblies and to detect abnormalities. Monitoring information may be generated based on the detected condition and abnormalities, and presented to a driver or other occupants onboard the vehicle in real time.

Claims

1. A vehicle comprising:

a wheel assembly;

an infrared imaging module comprising a focal plane array (FPA) configured to capture a thermal image of at least a portion the wheel assembly; and

a processor in communication with the infrared imaging module and configured to process the thermal image to generate monitoring information associated with the wheel assembly.

2. The vehicle of claim 1, further comprising a display configured to present the monitoring information to a user, and wherein the processor is configured to communicate wirelessly with the infrared imaging module.

3. The vehicle of claim 1, wherein:

the processor is configured to determine a temperature of at least a portion of the wheel assembly from the thermal image, and to detect whether the temperature is abnormal; and

the monitoring information comprises an alarm based on the detection of the temperature abnormality.

4. The vehicle of claim 1, wherein:

the wheel assembly comprises a tire;

the thermal image includes an image of thermal radiation from the tire;

the processor is configured to analyze the thermal image to detect an abnormal condition associated with the wheel assembly; and

the monitoring information comprises an alarm based on the detected abnormal condition.

5. The vehicle of claim 4, wherein:

the detected abnormal condition is a flat tire condition, a tire tread separation condition, a tire air leak condition, an underinflated tire condition, an overinflated tire condition, a suspension misalignment condition, an unbalanced wheel condition, a worn suspension condition, or a worn tire condition; and

the monitoring information comprises an identification of the detected abnormal condition.

6. The vehicle of claim 1, wherein:

the wheel assembly comprises a brake assembly;

the thermal image includes an image of thermal radiation from the brake assembly;

the processor is configured to analyze the thermal image to detect an abnormal condition associated with the brake assembly; and

the monitoring information comprises an alarm based on the detected abnormal condition.

7. The vehicle of claim 6, wherein:

the abnormal condition is a crack formation condition, a brake glazing condition, a high spot formation condition, or a brake warping condition; and

the monitoring information comprises an identification of the detected abnormal condition.

8. The vehicle of claim 1, wherein:

the processor is configured to convert the thermal image into a user-viewable image of the at least a portion of the wheel assembly; and

the monitoring information comprises the user-viewable image of the at least a portion of the wheel assembly.

9. The vehicle of claim 1, wherein:

the thermal image is an unblurred thermal image of the at least a portion of the wheel assembly;

the infrared imaging module is configured to capture an intentionally blurred thermal image of the at least a portion of the wheel assembly; and

the processor is configured to determine a plurality of non-uniform correction (NUC) terms based on the intentionally blurred thermal image and apply the NUC terms to the unblurred thermal image to remove noise form the unblurred thermal image.

10. The vehicle of claim 1, wherein:

the processor is configured to store the monitoring information in a memory device or a recording device; and

the processor is configured to generate, based on the monitoring information, a control signal to adjust one or more vehicle components associated with the wheel assembly.

11. A method comprising:

capturing, at a focal plane array (FPA) of an infrared imaging module, a thermal image of at least a portion of a wheel assembly of a vehicle, wherein the infrared imaging module is mounted in or on the vehicle so that the at least a portion of the wheel assembly is within its field of view (FOV);

processing the thermal image to determine a condition of the wheel assembly; and

generating monitoring information about the condition of the wheel assembly.

12. The method of claim 11, wherein the processing is by a processor, the method further comprising:

receiving the thermal image at the processor via wireless communication; and

presenting the monitoring information to a user.

13. The method of claim 11, wherein:

the processing comprises determining a temperature of at least a portion of the wheel assembly from the thermal image, and detecting whether the temperature is abnormal; and

the monitoring information comprises an alarm based on the detection of the temperature abnormality.

14. The method of claim 11, wherein:

the thermal image includes an image of thermal radiation from a tire;

the processing comprises analyzing the thermal image to detect an abnormal condition associated with the wheel assembly; and

the monitoring information comprises an alarm based on the detected abnormal condition.

15. The method of claim 14, wherein:

the detected abnormal condition is a flat tire condition, a tire tread separation condition, a tire air leak condition, an underinflated tire condition, an overinflated tire condition, a suspension misalignment condition, an unbalanced wheel condition, a worn suspension condition, or a worn tire condition; and

the monitoring information comprises an identification of the detected abnormal condition.

16. The method of claim 11, wherein:

the thermal image includes an image of thermal radiation from a brake assembly;

the processing comprises analyzing the thermal image to detect an abnormal condition associated with the brake assembly; and

the monitoring information comprises an alarm based on the detected abnormal condition.

17. The method of claim 16, wherein:

the abnormal condition is a crack formation condition, a brake glazing condition, a high spot formation condition, or a brake warping condition; and

the monitoring information comprises an identification of the detected abnormal condition.

18. The method of claim 11, further comprising:

converting the thermal image into a user-viewable image of the at least a portion of the wheel assembly, wherein the monitoring information comprises the user-viewable image of the at least a portion of the wheel assembly.

19. The method of claim 11, wherein the thermal image is an unblurred thermal image, the method further comprising:

capturing an intentionally blurred thermal image of the at least a portion of the wheel assembly;

determining a plurality of non-uniform correction (NUC) terms based on the intentionally blurred thermal image; and

applying the NUC terms to the unblurred thermal image to remove noise from the unblurred thermal image.

20. The method of claim 11, further comprising:

storing the monitoring information in a memory device or a recording device; and

generating, based on the monitoring information, a control signal to adjust one or more vehicle components associated with the wheel assembly.