FAULTY CART WHEEL DETECTION

• US 20140180528A1
• Filed: 12/20/2012
• Published: 06/26/2014
• Est. Priority Date: 12/20/2012
• Status: Active Grant

• Current Assignee: Walmart Apollo, LLC (WalMart Inc.)
• Original Assignee: Wal-Mart Stores Texas LLC (WalMart Inc.)
• Inventors: Argue, Stuart, Marcar, Anthony Emile
• Granted Patent: US 8,930,065 B2
• Time in Patent Office: Days
• US Class Current: 701/31.4
• CPC Class Codes: G06T 2207/10016 Video; Image sequence
• CPC Class Codes: G06T 2207/30108 Industrial image inspection
• CPC Class Codes: G06T 7/0004 Industrial image inspection
• CPC Class Codes: G07C 5/006 Indicating maintenance

Abstract

A system and method of identifying carts exhibiting tendencies that are indicative of damaged or defective wheels. A shopping cart may be identified and tracked visually through one or more surveillance cameras. By comparing the cart'"'"'s tracked movement to known symptomatic movement patterns, the system may identify defective or damaged carts. Alternatively, by analyzing movement and positioning of a cart'"'"'s swiveling wheels, the system may identify defective or damaged carts. Alternatively, by identifying if a customer has abandoned a cart, the system may identify defective or damaged carts. A notification message may be transmitted to an associate to repair or replace the identified problematic cart. The notification may be displayed on a mobile computing device, a workstation, or other like systems.

Claims

1. A computer-implemented method of detecting a faulty cart wheel, comprising:

receiving, at an image processing module, an image sequence depicting a cart;

identifying, by the image processing module, a swiveling wheel of the cart;

determining, by the image processing module, an observed oscillation frequency of the swiveling wheel;

if the observed oscillation frequency exceeds an oscillation frequency threshold, transmitting, by an application server to a user computing device, an alert regarding the cart.

2. The method of claim 1, wherein transmitting, by an application server to a user computing device, an alert regarding the cart comprises transmitting a signal to a mobile computing device.

3. The method of claim 1, wherein the alert comprises a last-known location of the identified cart.

4. The method of claim 1, wherein the alert comprises an image of a customer using the cart.

5. The method of claim 1, wherein determining, by the image processing module, an observed oscillation frequency of the swiveling wheel comprises determining, by the image processing module, a steering direction of the swiveling wheel in the image sequence.

6. The method of claim 1, further comprising:

determining, by the image processing module, a cart facing direction in the image sequence and

modifying the observed oscillation frequency to compensate for cart movement.

7. The method of claim 1, further comprising:

locating the cart and

retrieving the cart.

8. A computer-implemented method of detecting a faulty cart wheel, comprising:

receiving, at an image processing module, an image depicting a cart;

analyzing, by the image processing module, a first swiveling wheel of the cart to determine a first steering direction;

analyzing, by the image processing module, a second swiveling wheel of the cart to determine a second steering direction; and

if the first steering direction and the second steering direction are not coordinated, transmitting an alert regarding the cart.

9. The method of claim 8, further comprising comparing, by the image processing module, the first steering direction and the second steering direction.

10. The method of claim 8, wherein transmitting an alert regarding the cart comprises transmitting a signal to a mobile computing device.

11. The method of claim 8, wherein the alert comprises a last-known location of the identified cart.

12. The method of claim 8, wherein the alert comprises an image of a customer using the cart.

13. A system for detecting a faulty wheel, comprising:

a camera;

an image processing module comprising one or more image processing processors and one or more image processing memory devices operably coupled to the one or more image processing processors and storing executable and operational image processing data, the executable and operational image processing data effective to cause the one or more image processing processors to;

analyze a sequence of images captured by the camera; and

identify a steering direction of a swiveling wheel of a cart depicted in the image sequence; and

an application server comprising one or more application server processors and one or more application server memory devices operably coupled to the one or more application server processors and storing executable and operational application server data, the executable and operational application server data effective to cause the one or more application server processors to create an alert if the image processing module detected that the cart has a suspected defective wheel.

14. The system of claim 13, further comprising computer-readable instructions installed in a memory of a mobile computing device.

15. The system of claim 14, wherein the computer-readable instructions installed in a memory of a mobile computing device are adapted to display the alert on the mobile computing device.