US 12,405,348 B2
Location estimation apparatus, facility device system, location estimation method, and recording medium
Takeru Kuroiwa, Tokyo (JP)
Assigned to Mitsubishi Electric Corporation, Tokyo (JP)
Appl. No. 18/044,804
Filed by Mitsubishi Electric Corporation, Tokyo (JP)
PCT Filed Nov. 24, 2020, PCT No. PCT/JP2020/043682
§ 371(c)(1), (2) Date Mar. 10, 2023,
PCT Pub. No. WO2022/113172, PCT Pub. Date Jun. 2, 2022.
Prior Publication US 2023/0366978 A1, Nov. 16, 2023
Int. Cl. G01S 5/12 (2006.01); G01S 5/02 (2010.01)
CPC G01S 5/12 (2013.01) [G01S 5/0284 (2013.01)] 5 Claims
OG exemplary drawing
 
5. A non-transitory computer-readable recording medium storing a program, the program causing a computer communicatively connected to at least two facility devices, the facility devices including a first facility device whose installation location is known and a second facility device whose installation location is unknown, to function as:
a relative location receiver to receive measurement information about a radio wave intensity and a phase difference of a wireless signal, the measurement information being sent from any of the facility devices;
a relative location estimator to estimate a relative location between the first facility device and the second facility device based on the received measurement information; and
an absolute location estimator to estimate an absolute location of the second facility device based on the estimated relative location, the installation location of the first facility device, and installation specifications stipulated for the facility devices, wherein
the installation specifications stipulate at least one of an installation interval of the facility devices or an installation angle of the facility devices.