US 12,136,013 B2
Wireless tag reading device, wireless tag reading method, and program recording medium
Yuki Suzuki, Izunokuni Shizuoka (JP)
Assigned to Toshiba Tec Kabushiki Kaisha, Tokyo (JP)
Filed by TOSHIBA TEC KABUSHIKI KAISHA, Tokyo (JP)
Filed on Jul. 20, 2022, as Appl. No. 17/869,767.
Application 17/869,767 is a continuation of application No. PCT/JP2021/027094, filed on Jul. 20, 2021.
Claims priority of application No. 2020-142636 (JP), filed on Aug. 26, 2020.
Prior Publication US 2022/0358298 A1, Nov. 10, 2022
Int. Cl. G06K 7/10 (2006.01)
CPC G06K 7/10356 (2013.01) [G06K 7/10366 (2013.01)] 8 Claims
OG exemplary drawing
 
1. A wireless tag reading device comprising:
a plurality of antennas for wireless tag communication arranged along a passage through which a wireless tag passes;
a number-of-times acquisition unit configured to acquire a number of times the wireless tag has been read by each of the antennas for each unit time;
a strength acquisition unit configured to acquire a received signal strength indicator when the wireless tag is read by each of the antennas for each unit time; and
a direction specifying unit configured to specify a moving direction of the wireless tag passing through the passage based on:
a first location of the wireless tag during a first unit time, the first location being specified based on comparison of the numbers of times the wireless tag has been read by the plurality of antennas during the first unit time with a predetermined number of times and comparison of received signal strength indicators of the antennas that are acquired for the first unit time with each other, and
a second location of the wireless tag during a second unit time later than the first unit time, the second location being specified based on comparison of the numbers of times the wireless tag has been read by the plurality of antennas during the second unit time with the predetermined number of times and comparison of received signal strength indicators of the antennas that are acquired for the second unit time with each other.