System, method and application for estimating pneumatic pressure state of vehicle tires using a handheld device

• US 9,500,550 B2
• Filed: 11/08/2012
• Issued: 11/22/2016
• Est. Priority Date: 11/08/2011
• Status: Active Grant

• Current Assignee: Goodyear Tire & Rubber Company
• Original Assignee: Nomatix Limited
• Inventors: Wittmann, Kfir
• Primary Examiner(s): Mawari, Redhwan K
• Application Number:
  US14/357,063
• Publication Number:
  US 20140309845A1
• Time in Patent Office: 1,475 Days
• Field of Search: 701/36, 701/31.9
• US Class Current: 1/1
• CPC Class Codes: G01L 17/00 Devices or apparatus for measuring tyre pressure or the pressure in other inflated bodies
• CPC Class Codes: H04N 7/185 from a mobile camera, e.g. for remote control

Abstract

System method and computer operable application for estimating pneumatic pressure in tires of vehicles, using a handheld device having at least one camera installed therein that allow acquiring an image of a wheel of a vehicle, using the camera of the handheld device, analyzing the acquired image for estimating value of at least one parameter of the tire of the wheel in the image, where the parameter is related to pneumatic pressure of the tire, estimating pneumatic pressure state of the respective tire by using the parameter and presenting an indication of the estimated pneumatic pressure state.

Claims

1. A system for estimating pneumatic pressure state of vehicle tires using a handheld device having at least one camera installed therein, said system comprising:

an image acquisition module configured for allowing a user to acquire an image of a vehicle wheel, using the camera and image acquisition functionality of the handheld device, said acquiring comprising;

(i) iteratively, based on a video stream received from said camera;

(1) analyzing a frame of the video, to determine (a) an orientation between an axis of said at least one of wheel and a focal axis of said camera, (b) a center distance of said at least one wheel in the frame, and (c) whether the frame contains a complete wheel capture,

(2) presenting a marking on a display of said handheld device, the marking instructing the user of said handheld device to turn said handheld device for said acquiring, and

(ii) acquiring said image when said orientation is substantially coaxial and said at least one wheel is substantially centered in said frame;

an image analysis module configured for receiving said image from said image acquisition module and analyzing said image for estimating the pneumatic pressure state of a tire of the wheel in said image; and

a presentation module for presenting the estimated pneumatic pressure state of the tire via said display of said handheld device.

2. The system according to claim 1, wherein said image analysis is carried out by using at least one processor of the handheld device.

3. The system according to claim 1 further comprising a communication module for communicating with at least one remote server through at least one communication link provided by the handheld device, wherein said image analysis is carried out by using at least one processor of said at least one remote server.

4. The system according to claim 1, wherein said image analysis comprises measuring value of at least one predefined parameter of the tire from its image and comparing the measured parameter value with a reference known parameter value, wherein said system further enables accessing at least one database comprising known parameters values.

5. The system according to claim 4, wherein said at least one parameter is at least one of:

footprint length, sidewall height, each indicates the length or height, at the bottom part of the tire that is in contact with the ground.

6. The system according to claim 1, wherein a user interface further enables the user to input information through at least one input device of said handheld device, said information is indicative of a type of the vehicle, wherein said estimation of the tire pneumatic pressure state is carried out according to said input information.

7. The system according to claim 6, wherein said user interface is also configured to allow inputting location and/or size of the wheel, said pneumatic pressure estimation is carried out also according to said location and/or size of the wheel.

8. The system according to claim 1 is further configured to extract data from at least one positioning system of the handheld device, allowing a user interface to present said positioning data for assisting the user in positioning the handheld device and said image analysis module to use the extracted data for correcting image distortions caused due to inaccuracy in the positioning of the device in respect to the wheel when image was acquired to improve pneumatic pressure state estimation.

9. The system according to claim 1, wherein said image acquisition module and a user interface further enable retrieval of wheel images from a data storage for analyzing thereof.

10. A method of estimating pneumatic pressure in tires of vehicles, using a handheld device having at least one camera installed therein, said method comprising:

acquiring an image of at least one of wheel of a vehicle, using at least one camera of the handheld device, said acquiring comprising;

(i) iteratively, based on a video stream received from said camera;

(1) analyzing a frame of the video, to determine (a) an orientation between an axis of said at least one of wheel and a focal axis of said camera, (b) a center distance of said at least one wheel in the frame, and (c) whether the frame contains a complete wheel capture,

(2) presenting a marking on a display of said handheld device, the marking instructing a user of said handheld device to turn said handheld device for said acquiring, and

(ii) acquiring said image when said orientation is substantially coaxial and said at least one wheel is substantially centered in said frame;

analyzing said image for estimating value of at least one parameter of said tire related to pneumatic pressure thereof;

estimating pneumatic pressure state of the tire by using said parameter; and

presenting an indication of said estimated pneumatic pressure state, using said display of the handheld device.

11. The method according to claim 10, wherein said at least one parameter comprises at least one of:

footprint length;

footprint angle;

sidewall height.

12. The method according to claim 10 further comprising identifying:

type of the vehicle, location of the tire of the image, and size of the tire of the image, wherein said pneumatic pressure estimation is carried out by also using said vehicle type and tire location and size to compare estimated pneumatic pressure state with a reference pneumatic pressure of a properly inflated tire of the same vehicle type and tire location and size.

13. The method according to claim 12, wherein said identification of the vehicle type and tire location is done by at least one of:

automatically identifying the vehicle by using at least one sensor for sensing at least one parameter associated with the type of the vehicle;

receiving input data indicative of the type of the vehicle and the tire location.

14. The method according to claim 10 further comprising identifying image quality level, wherein said image analysis is carried out once the image quality exceeds predefined criteria.

15. The method according to claim 10 further comprising transmitting an alert message to the handheld device of the user, said message is indicative of the pneumatic pressure state of the tire.

16. The method according to claim 10 further comprising retrieving data from at least one data source through said handheld device for estimating temperature change of the tire, wherein said estimating of the pneumatic pressure state of the tire is carried out also according to said estimated temperature change thereof.

17. The method according to claim 10 further comprising monitoring the user'"'"'s vehicle tire by recording each event of tire pneumatic pressure estimation and its timing.

18. The method according to claim 10 further comprising retrieving a wheel image from data storage.

19. A computer operable application for estimating pneumatic pressure state of vehicle tires using a handheld device having at least one camera installed therein, said application comprising:

an image acquisition module configured for allowing a user to acquire an image of a vehicle wheel, using the camera and image acquisition functionality of the handheld device, said acquiring comprising;

(i) iteratively, based on a video stream received from said camera;

(1) analyzing a frame of the video, to determine (a) an orientation between an axis of said at least one of wheel and a focal axis of said camera, (b) a center distance of said at least one wheel in the frame, and (c) whether the frame contains a complete wheel capture,

(2) presenting a marking on a display of said handheld device, the marking instructing the user of said handheld device to turn said handheld device for said acquiring, and

(ii) acquiring said image when said orientation is substantially coaxial and said at least one wheel is substantially centered in said frame;

an image analysis module configured for receiving said image of a wheel from said image acquisition module and analyzing said image for estimating the pneumatic pressure state of a tire of the wheel in said image; and

a presentation module for presenting the estimated pneumatic pressure state of the tire via said display of said handheld device.