US 12,002,337 B1
Detecting interactions with storage units based on RFID signals and auxiliary signals
Aaron M. McDaniel, Seattle, WA (US); Nathan P. O'Neill, Snohomish, WA (US); Nirmal Doshi, Bothell, WA (US); Yuxing Tang, Bothell, WA (US); and Robert Jerome Colwill, Bainbridge Island, WA (US)
Assigned to Amazon Technologies, Inc., Seattle, WA (US)
Filed by Amazon Technologies, Inc., Seattle, WA (US)
Filed on Nov. 28, 2022, as Appl. No. 18/059,144.
Application 18/059,144 is a continuation of application No. 17/118,417, filed on Dec. 10, 2020, granted, now 11,514,766.
This patent is subject to a terminal disclaimer.
Int. Cl. G08B 13/14 (2006.01); G08B 13/24 (2006.01)
CPC G08B 13/1472 (2013.01) [G08B 13/2417 (2013.01); G08B 13/246 (2013.01); G08B 13/248 (2013.01); G08B 13/2485 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A system comprising:
a computer system;
a shelf;
a plurality of sensors, wherein each of the sensors is provided in association with the shelf, and wherein each sensor of the plurality of sensors is configured to generate a signal indicative of a force applied to the sensor; and
a platform resting on each of the plurality of sensors, wherein the platform further comprises:
a plurality of RFID antennas, wherein each of the plurality of RFID antennas is configured to emit an RF field and to receive RFID signals;
an RFID reader;
at least one computer processor; and
a transceiver in communication with the RFID reader and the computer system,
wherein the computer system is programmed with one or more sets of instructions that, when executed, cause the computer system to at least:
receive, from the platform by way of the transceiver, a first set of data determined from a first set of RFID signals transmitted by a first set of RFID transmitters at a first time;
receive, from the sensors, a first set of signals generated in response to forces supplied to the sensors at approximately the first time;
determine a first weight on the platform at the first time based at least in part on the first set of signals;
identify a first set of items based at least in part on the first set of data and the first weight; and
in response to identifying the first set of items,
store at least one indication that at least the first set of items is on the platform at the first time.