US 11,796,685 B2
Positioning control device
Naoto Toda, Tokyo (JP)
Assigned to CASIO COMPUTER CO., LTD., Tokyo (JP)
Filed by CASIO COMPUTER CO., LTD., Tokyo (JP)
Filed on Nov. 29, 2021, as Appl. No. 17/537,425.
Application 17/537,425 is a division of application No. 16/246,949, filed on Jan. 14, 2019, granted, now 11,372,116.
Claims priority of application No. 2018-006960 (JP), filed on Jan. 19, 2018.
Prior Publication US 2022/0082706 A1, Mar. 17, 2022
Int. Cl. G01S 19/34 (2010.01); G01S 19/28 (2010.01); G01S 19/49 (2010.01)
CPC G01S 19/34 (2013.01) [G01S 19/28 (2013.01); G01S 19/49 (2013.01)] 5 Claims
OG exemplary drawing
 
1. A positional control device comprising:
a receiving unit that receives a signal from at least one of a plurality of positioning satellites;
sensors that detect a movement of the positioning control device; and
a processor, wherein the processor is configured to execute:
a turning process of controlling turning of the receiving unit on and off,
a first positioning process of locating, by a first method, a position of the positioning control device based on the received signal received from the positioning satellites, while the receiving unit is on,
a second positioning process of locating, by a second method, a position of the positioning control device based on (i) a latest position of the positioning control device measured by the first method and (ii) the movement of the positioning control device detected by the sensors after the receiving unit is turned off, while the receiving unit is off,
an acquisition process of acquiring a predicted positioning time from turning the receiving unit on in the turning process to completion of locating the position of the positioning control device by the first method in the first positioning process, while the receiving unit is off, and
a derivation process of deriving an estimated error of the position of the positioning control device measured by the second method, by adding a first estimated error and a second estimated error, the first estimated error being based on the movement of the positioning control device detected by the sensors after the receiving unit is turned off, and the second estimated error being based on the predicted positioning time acquired in the acquisition process,
wherein, in the turning process, when the estimated error derived in the derivation process is determined to be greater than or equal to a predetermined value of an allowable error while the receiving unit is turned off, the receiving unit is turned on.