US 12,244,073 B2
Communication device
Yuishi Takeno, Shizuoka (JP); Hiroyuki Ishikawa, Shizuoka (JP); and Keita Yamazaki, Shizuoka (JP)
Assigned to TOSHIBA TEC KABUSHIKI KAISHA, Tokyo (JP)
Filed by TOSHIBA TEC KABUSHIKI KAISHA, Tokyo (JP)
Filed on Jul. 8, 2022, as Appl. No. 17/860,805.
Claims priority of application No. 2021-149352 (JP), filed on Sep. 14, 2021.
Prior Publication US 2023/0077472 A1, Mar. 16, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. H01Q 3/02 (2006.01); G06K 7/10 (2006.01); G06Q 20/20 (2012.01); G08B 21/18 (2006.01)
CPC H01Q 3/02 (2013.01) [G06K 7/10316 (2013.01); G06Q 20/208 (2013.01); G08B 21/182 (2013.01)] 6 Claims
OG exemplary drawing
 
1. A commodity registration system comprising:
a reference tag configured to couple to or embed in a table or surface;
an antenna;
an actuator configured to reposition the antenna between a first position underneath the table or surface and a second position underneath the table or surface; and
a control system configured to:
use the antenna to acquire (i) one or more reference signals wirelessly transmitted from the reference tag whose relative position to the antenna is known and (ii) one or more target signals wirelessly transmitted from a target tag attached to a commodity for purchase that is placed on or proximate the table or surface, the target tag different from the reference tag, wherein the one or more reference signals include a first reference signal acquired by the antenna at the first position and a second reference signal acquired by the antenna at the second position, and wherein the one or more target signals include a first target signal acquired by the antenna at the first position and a second target signal acquired by the antenna at the second position;
determine that the one or more target signals transmitted from the target tag are invalid based on a phase characteristic of the one or more reference signals transmitted from the reference tag, wherein the phase characteristic of the one or more reference signals is a threshold phase difference determined based on a reference phase difference between the first reference signal and the second reference signal;
determine a target phase difference between the first target signal and the second target signal;
register the commodity for purchase in response to the target phase difference being less than the reference phase difference; and
refrain from registering the commodity for purchase in response to the target phase difference being greater than the threshold phase difference.