System for monitoring usage of shopping carts or other human-propelled vehicles
First Claim
1. A system for monitoring shopping cart usage in the vicinity of a store, the system comprising:
- a plurality of access points mounted in a vicinity of the store; and
a plurality of shopping carts, each shopping cart including a wheel assembly that comprises a battery-powered cart transceiver that is configured to communicate wirelessly with the access points on a wireless network, each cart transceiver configured to operate as a uniquely addressable node on the wireless network;
said access points and cart transceivers programmed to communicate with each other on said wireless network using a non-standard wireless communications protocol in which the cart transceivers (1) generate received signal strength (RSSI) measurements based on transmissions from the access points, and (2) use said RSSI measurements to detect entry into particular zones that correspond to particular access points, wherein each cart transceiver is configured to modify its communication behavior in response to detecting that it has entered into a zone corresponding to an access point.
3 Assignments
0 Petitions
Accused Products
Abstract
A vehicle tracking system includes a wheel containing sensor circuitry capable of sensing various types of conditions, such as wheel rotation, wheel vibration caused by skidding, and specific electromagnetic and/or magnetic signals indicative of particular wheel locations. The sensor circuitry is coupled to an RF transceiver, which may but need not be included within the wheel. The wheel may also include a brake mechanism. In one embodiment, the wheels are placed on shopping carts and are used to collect and monitor shopping cart status and location data via a wireless network. The collected data may be used for various purposes, such as locking the wheel of an exiting cart if the customer has not paid, estimating numbers of queued carts, stopping wheel skid events that occur during mechanized cart retrieval, store planning, and providing location-based messaging to customers.
-
Citations
40 Claims
-
1. A system for monitoring shopping cart usage in the vicinity of a store, the system comprising:
-
a plurality of access points mounted in a vicinity of the store; and a plurality of shopping carts, each shopping cart including a wheel assembly that comprises a battery-powered cart transceiver that is configured to communicate wirelessly with the access points on a wireless network, each cart transceiver configured to operate as a uniquely addressable node on the wireless network; said access points and cart transceivers programmed to communicate with each other on said wireless network using a non-standard wireless communications protocol in which the cart transceivers (1) generate received signal strength (RSSI) measurements based on transmissions from the access points, and (2) use said RSSI measurements to detect entry into particular zones that correspond to particular access points, wherein each cart transceiver is configured to modify its communication behavior in response to detecting that it has entered into a zone corresponding to an access point. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
-
-
21. A system for monitoring usage of a human-propelled cart, the system comprising:
-
a wheel assembly that is adapted to attach to a cart, said wheel assembly comprising a wheel, and comprising a battery-powered cart transceiver that is configured to communicate wirelessly with a plurality of access points on a wireless network, said cart transceiver configured to operate as a uniquely addressable node on the wireless network; said cart transceiver programmed to communicate with the access points on the wireless network using a non-standard wireless communications protocol in which the cart transceiver uses received signal strength (RSSI) measurements generated based on communications with the access points to detect entry of the wheel assembly into particular zones that correspond to particular access points, said cart transceiver further programmed to modify its communication behavior in response to detecting entry into a zone that corresponds to an access point. - View Dependent Claims (22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40)
-
Specification