US 12,220,231 B2
Estimation device and estimation method
Takeshi Nakayama, Hyogo (JP); Shoichi Iizuka, Osaka (JP); Naoki Honma, Iwate (JP); Nobuyuki Shiraki, Iwate (JP); Teppei Hayashi, Iwate (JP); and Kazuki Numazaki, Iwate (JP)
Assigned to PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD., Osaka (JP)
Appl. No. 17/612,362
Filed by Panasonic Intellectual Property Management Co., Ltd., Osaka (JP)
PCT Filed Dec. 28, 2020, PCT No. PCT/JP2020/049131
§ 371(c)(1), (2) Date Nov. 18, 2021,
PCT Pub. No. WO2021/140988, PCT Pub. Date Jul. 15, 2021.
Claims priority of application No. 2020-000876 (JP), filed on Jan. 7, 2020.
Prior Publication US 2022/0233103 A1, Jul. 28, 2022
Int. Cl. G01S 13/88 (2006.01); A61B 5/107 (2006.01); A61B 5/1171 (2016.01); G01S 3/14 (2006.01); G01S 7/02 (2006.01); A61B 5/00 (2006.01); A61B 5/0507 (2021.01); A61B 5/11 (2006.01); G01S 7/41 (2006.01); G01S 13/00 (2006.01); G01S 13/87 (2006.01)
CPC A61B 5/1171 (2016.02) [A61B 5/107 (2013.01); G01S 3/143 (2013.01); G01S 7/02 (2013.01); G01S 13/88 (2013.01); A61B 5/0507 (2013.01); A61B 5/1114 (2013.01); A61B 5/1126 (2013.01); A61B 5/6889 (2013.01); A61B 5/7267 (2013.01); A61B 2503/12 (2013.01); A61B 2505/07 (2013.01); A61B 2562/0228 (2013.01); G01S 7/415 (2013.01); G01S 13/003 (2013.01); G01S 13/874 (2013.01)] 9 Claims
OG exemplary drawing
 
1. An estimation device that identifies a living body or estimates an orientation of the living body, by using electromagnetic wave, the estimation device comprising: M transmission antenna elements each transmitting a first electromagnetic transmission signal to a predetermined range that includes a first living body, where M is an integer greater than or equal to 1;
N receivers disposed to surround the predetermined range, where N is an integer greater than or equal to 3, the N receivers each including a reception antenna element that receives, over a predetermined period, a first reception signal that is the first electromagnetic transmission signal reflected by the first living body;
a memory that stores training signals which are M×N second reception signals obtained by causing each of the N receivers to preliminarily receive a second reception signal that is a second electromagnetic transmission signal transmitted from each of the M transmission antenna elements and reflected by a second living body;
a first vector calculator that calculates a first vector for each of the training signals and each of M×N first reception signals by respective predetermined methods, the M×N first reception signals being obtained by the N receivers each receiving the first reception signal; and
an estimator that selects a total number of values to be used which is determined from the first vector by a predetermined method, calculates a plurality of correlation coefficients, and identifies the first living body or estimates an orientation of the first living body by a predetermined method, using the plurality of correlation coefficients calculated.