US 12,228,638 B2
Electronic device, method for controlling electronic device, and program
Takuya Homma, Yokohama (JP); Tooru Sahara, Yokohama (JP); Masayuki Sato, Yokohama (JP); Masamitsu Nishikido, Yokohama (JP); Youhei Murakami, Yokohama (JP); and Satoshi Kawaji, Yokohama (JP)
Assigned to KYOCERA Corporation, Kyoto (JP)
Appl. No. 17/756,739
Filed by KYOCERA Corporation, Kyoto (JP)
PCT Filed Dec. 1, 2020, PCT No. PCT/JP2020/044745
§ 371(c)(1), (2) Date Jun. 1, 2022,
PCT Pub. No. WO2021/117559, PCT Pub. Date Jun. 17, 2021.
Claims priority of application No. 2019-222346 (JP), filed on Dec. 9, 2019.
Prior Publication US 2023/0003876 A1, Jan. 5, 2023
Int. Cl. G01S 13/93 (2020.01); G01S 13/58 (2006.01); G01S 13/931 (2020.01)
CPC G01S 13/931 (2013.01) [G01S 13/58 (2013.01)] 10 Claims
OG exemplary drawing
 
1. An electronic device comprising:
a transmission antenna that transmits a transmission wave;
a reception antenna that receives a reflected wave that is the transmission wave having been reflected; and
a control unit that detects an object that reflects the transmission wave, based on a transmission signal transmitted as the transmission wave and a reception signal received as the reflected wave, wherein
the control unit performs control to detect, as a target, an object having a motion characteristic of a motion of an arm of a person, among objects located around the electronic device; and
wherein
in a case where Vh denotes a walking velocity of the person, g denotes a gravitational acceleration, L denotes a length of the arm of the person, and Om denotes a maximum angle of the arm swung by the person, when a relative velocity Vr obtained by subtracting the velocity Vh from a measured velocity of an object satisfies
Vr={2gL(1−cos Φm)}1/2,
the control unit determines that the object has a motion characteristic of a motion of an arm of a person who is moving at a predetermined velocity, or
in a case where Vh denotes a walking velocity of the person and W denotes a walking stride of the person, when a measured period Ta of an object satisfies
Ta=2 W/Vh,
the control unit determines that the object has a motion characteristic of a motion of an arm of a person who is moving at a predetermined velocity.