公开(公告)号：US12270924B2

公开(公告)日：2025-04-08

申请号：US17609288

申请日：2021-02-17

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Shoichi Iizuka ,  Takeshi Nakayama ,  Naoki Honma ,  Nobuyuki Shiraki

IPC: G01S5/02

Abstract: A sensor includes: a complex transfer function calculator that calculates a complex transfer function representing propagation characteristics between each N transmission antenna element and each M reception antenna element, using radio waves transmitted as a reception signal in a space where at least one living body is present from each N transmission antenna element and received by each M reception antenna element; a spectrum calculator that: calculates likelihood spectra, each indicating a likelihood of presence of each living body, by an estimation algorithm for estimating the presence from living body information that is a living body component in the complex transfer function, using different values as the number of the at least one living body; and calculates an integrated spectrum by integrating the likelihood spectra calculated; and an estimator that estimates living body information indicating at least the number of living bodies, and outputs the living body information estimated.

公开(公告)号：US10969479B2

公开(公告)日：2021-04-06

申请号：US16240919

申请日：2019-01-07

Applicant: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.

Inventor： Shoichi Iizuka ,  Takeshi Nakayama ,  Naoki Honma ,  Dai Sasakawa ,  Yukio En

IPC: G01S13/48 ,  G06F3/01 ,  G01S7/292 ,  G01S7/282 ,  G01S13/87 ,  G01S7/41 ,  G06K9/00

Abstract: There is provided an estimation device that estimates a living body orientation. The estimation device includes: transceivers that transmit transmission signals using M transmission antenna elements arranged to surround a predetermined range including a living body, and receive reception signals using N receiving antenna elements; and a circuit that, for each of M sets of N reception signals corresponding to transmitted M transmission signals, performs calculation of a characteristic quantity based on the N reception signals included in the set, the characteristic quantity with a greater value indicating a waveform having a larger amplitude and higher regularity, identifies a first transmission antenna element corresponding to a first characteristic quantity having a greatest value among M characteristic quantities by comparing the M characteristic quantities obtained by the calculation with each other, and estimates the living body orientation to indicate a predetermined direction based on the first transmission antenna element identified.

公开(公告)号：US10914829B2

公开(公告)日：2021-02-09

申请号：US15865956

申请日：2018-01-09

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Takeshi Nakayama ,  Shoichi Iizuka ,  Naoki Honma

IPC: G01S13/48 ,  G01S5/02 ,  G01S3/04 ,  G01S13/00 ,  G01S3/74 ,  G01S7/41 ,  G01S3/28 ,  G01S13/88 ,  G01S13/42 ,  G01S13/02

Abstract: A positioning sensor includes m receiving antennas connected to a feeder circuit and n variable loads, and a receiver that receives a first signal via the m receiving antennas. The positioning sensor further includes a memory that stores a first signal strength value of a first signal that the receiver receives when a variable load varies in value, and a processor that calculates a second signal strength value from a complex propagation channel, searches for a complex propagation channel candidate that has a minimum difference between a first signal strength and a second signal strength, determines the complex propagation channel candidate to be a complex propagation channel when the receiver receives the first signal, and estimates an incoming direction of the first signal from the determined complex propagation channel.