US 11,789,109 B2
Area determination system, area determination method, and program
Yanfeng Wang, Osaka (JP); Nobuyuki Shibano, Hyogo (JP); Yan Rong, Shiga (JP); Masayuki Amano, Osaka (JP); Mari Nakanishi, Tokyo (JP); Kazuhiro Matsumoto, Osaka (JP); and Chihiro Terayama, Osaka (JP)
Assigned to Panasonic Intellectual Property Management Co., Ltd., Osaka (JP)
Appl. No. 17/624,427
Filed by Panasonic Intellectual Property Management Co., Ltd., Osaka (JP)
PCT Filed Jun. 29, 2020, PCT No. PCT/JP2020/025545
§ 371(c)(1), (2) Date Jan. 3, 2022,
PCT Pub. No. WO2021/014897, PCT Pub. Date Jan. 28, 2021.
Claims priority of application No. 2019-134087 (JP), filed on Jul. 19, 2019.
Prior Publication US 2022/0397636 A1, Dec. 15, 2022
Int. Cl. G01S 5/02 (2010.01); G01S 3/02 (2006.01)
CPC G01S 5/02213 (2020.05) [G01S 5/02521 (2020.05)] 12 Claims
OG exemplary drawing
 
1. An area determination system, comprising:
a computer system,
the computer system, includes:
an acquisition unit configured to acquire information on a reception strength of a radio signal at a receiver in a facility, the radio signal being transmitted from a transmitter at a predetermined cycle,
identification information of the receiver, and
identification information of the transmitter;
a first estimation unit configured to estimate, based on a plurality of pieces of information on the reception strength acquired by the acquisition unit in a first time period, a location of the transmitter in the facility as estimated by the first estimation unit, the first time period being longer than the predetermined cycle;
a first determination unit configured to determine, based on the location of the transmitter in the facility estimated by the first estimation unit, a first candidate area in which the transmitter is present in the facility;
a second estimation unit configured to estimate, based on a plurality of pieces information on the reception strength acquired by the acquisition unit in a second time period, a location of the transmitter in the facility as estimated by the second estimation unit, the second time period being longer than the first time period and partially overlapping the first time period;
a second determination unit configured to determine, based on the location of the transmitter estimated by the second estimation unit, a second candidate area in which the transmitter is present in the facility; and
a correction unit configured to, when a determination result by the first determination unit is different from a determination result by the second determination unit, correct the determination result by the first determination unit to the determination result by the second determination unit.