Patents by Inventor Takeshi Nakayama

Takeshi Nakayama has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 11906656
    Abstract: A sensor includes: a correlation matrix calculator which calculates a correlation matrix from biological information extracted using reception signals obtained by receiving, in a predetermined period, signals transmitted to a predetermined space; a first number information calculator which calculates first number information; a MUSIC spectrum calculator which estimates a candidate of a position of at least one living body and outputs a likelihood spectrum; and a second number information calculator which estimates a position or second number information, which is a total number of living bodies with an increased degree of likelihood, from first position information possibly including a plurality of position candidates.
    Type: Grant
    Filed: February 25, 2020
    Date of Patent: February 20, 2024
    Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
    Inventors: Shoichi Iizuka, Takeshi Nakayama, Naoki Honma, Kazuki Numazaki, Nobuyuki Shiraki
  • Publication number: 20230303961
    Abstract: An object of the invention is to make it possible to provide a mechanism that applies an external stimulus and to measure structural and electromagnetic changes of a cell due to the external stimulus with high sensitivity by an NV center. There is provided an environment control mechanism configured to change a state of a sample by applying an external stimulus to the sample.
    Type: Application
    Filed: March 7, 2023
    Publication date: September 28, 2023
    Applicants: Hitachi, Ltd., National Institutes for Quantum Science and Technology
    Inventors: Masanari KOGUCHI, Takeshi NAKAYAMA, Ryuji IGARASHI, Kiichi KAMINAGA, Satoshi TSUKAMOTO
  • Patent number: 11630195
    Abstract: An estimation method is provided which includes: calculating a plurality of complex transfer functions, based on reception signals respectively received by N reception antenna elements during a predetermined period, the complex transfer functions each representing propagation characteristics between a transmission antenna element and the N reception antenna elements; extracting a variation component corresponding to each of the N reception antenna elements, from the calculated complex transfer functions, the variation component being caused by a living body; calculating a correlation matrix based on the variation component corresponding to each of the N reception antenna elements; calculating eigenvalues of the correlation matrix calculated in the calculating of the correlation matrix; and estimating the number of living bodies in a predetermined method, using the eigenvalues calculated in the calculating of the eigenvalues.
    Type: Grant
    Filed: December 21, 2018
    Date of Patent: April 18, 2023
    Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
    Inventors: Shoichi Iizuka, Takeshi Nakayama, Naoki Honma, Nobuyuki Shiraki
  • Patent number: 11578142
    Abstract: The present invention intends to provide an acid type carboxylated cellulose nanofiber having a high viscosity in a low shear region, or to provide an acid type carboxylated cellulose nanofiber having a very short fiber length, and the acid type carboxylated cellulose nanofiber has a carboxy group at least in part of a constituent unit constituting a cellulose molecular chain, wherein a viscosity of water dispersion with a content from 0.95 to 1.05% by mass is 400 Pa·s or higher at a shear velocity from 0.003 to 0.01 s?1 at 30° C., or an average fiber length is from 50 to 500 nm and a ratio of fibers having a fiber length of 300 nm or shorter is 50% or higher.
    Type: Grant
    Filed: November 2, 2017
    Date of Patent: February 14, 2023
    Assignee: NIPPON PAPER INDUSTRIES CO., LTD.
    Inventors: Satoshi Takaichi, Takeshi Nakatani, Masahiro Morita, Shinichi Onogi, Takeshi Fujii, Kenichiro Sasaki, Makoto Matsumoto, Takeshi Nakayama
  • Patent number: 11561279
    Abstract: An estimating method includes: measuring and receiving reception signals including a reflected signal reflected by a moving body, for a first period equivalent to a cycle of movement of the moving body; calculating first complex transfer functions indicating propagation characteristics, from the reception signals measured in the first period; calculating second complex transfer functions having reduced components corresponding to fluctuations, from the first complex transfer functions; extracting moving body information corresponding to a component related to the moving body by extracting moving body information corresponding to a predetermined frequency range of the second complex transfer functions calculated; and estimating a direction in which the moving body is present using the moving body information.
    Type: Grant
    Filed: December 9, 2019
    Date of Patent: January 24, 2023
    Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
    Inventors: Takeshi Nakayama, Shoichi Iizuka, Naoki Honma, Nobuyuki Shiraki, Abudusaimi Abuduaini
  • Publication number: 20220413071
    Abstract: An MRI apparatus equipped with a magnetic shield structure to reduce flux leakage. The MRI apparatus includes: a pair of static magnetic magnets that are disposed on opposite sides of an imaging space; and a pair of gradient coils that are disposed on opposite sides of the imaging space. Each static magnetic magnet has a disk-shaped magnetic material pole 201 and a ring-shaped magnetic material pole 202. Each gradient coil has a first coil 204 that applies a magnetic field gradient in a Z axis direction in an imaging region, and a laminate 301 that shields the disk-shaped magnetic material pole from magnetic flux produced in the first coil. The laminate has a smaller thickness in the Z axis direction on the ring-shaped magnetic material pole side than that in a center portion of the imaging space.
    Type: Application
    Filed: June 14, 2022
    Publication date: December 29, 2022
    Inventors: Kengo Goto, Manabu Aoki, Taisuke Takayanagi, Shin Hoshino, Yukinobu Imamura, Hiroyuki Takeuchi, Takeshi Nakayama
  • Patent number: 11515949
    Abstract: An estimation method includes: transmitting transmission signals using M transmission antenna elements; receiving reception signals by N reception antenna elements; calculating, from the reception signals, a first matrix whose components are complex transfer functions indicating propagation characteristics between the transmission antenna elements and the reception antenna elements; estimating, using the first matrix, a position and an orientation of a living body relative to an estimation device; when the estimated position is in a first identification region and the estimated orientation is in a predetermined range from a first direction, identifying the living body based on time waveforms of the reception signals and a first training signal which is obtained in advance in the first identification region and corresponds to the living body; and adding, as an identification region for identifying the first living body identified, a new identification region based on an estimated position of the first living b
    Type: Grant
    Filed: December 10, 2019
    Date of Patent: November 29, 2022
    Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
    Inventors: Takeshi Nakayama, Shoichi Iizuka, Naoki Honma, Dai Sasakawa
  • Publication number: 20220350014
    Abstract: A sensor includes: a complex transfer function calculator calculating complex transfer functions; a living body component extractor extracting living body information; a correlation matrix calculator calculating a target correlation matrix from the living body information; a noise information storage recording a noise correlation matrix; a first headcount information calculator calculating first headcount information that is a tentative number of persons present in the predetermined space, based on the target correlation matrix and a threshold calculated from the noise correlation matrix; a MUSIC spectrum calculator estimating position candidates for the living bodies, using the target correlation matrix, and outputting likelihood spectra indicating likelihoods of the respective living bodies being present in corresponding positions; and a second headcount information calculator estimating second headcount information that is a more accurate number of living bodies or positions from position information that
    Type: Application
    Filed: May 31, 2021
    Publication date: November 3, 2022
    Inventors: Shoichi IIZUKA, Takeshi NAKAYAMA, Naoki HONMA, Kentaro MURATA, Kazuki NUMAZAKI, Nobuyuki SHIRAKI
  • Patent number: 11415691
    Abstract: An estimation method for estimating target region information relating to a target region by using an estimation device that estimates information including a position of a living body by using a radio wave includes: acquiring first information relating to lengths of a planar shape of the target region; acquiring second information relating to an installation state of a transmission antenna and a reception antenna included in the estimation device; acquiring third information relating to a trajectory defined by a plurality of positions of the living body estimated by the estimation device when the living body moves along a predetermined path in the target region; and performing at least one of (1) estimation of the planar shape by correcting the first information and (2) estimation of the installation state by correcting the second information based on the first, second, and third information acquired, as the estimation of the target region information.
    Type: Grant
    Filed: December 10, 2019
    Date of Patent: August 16, 2022
    Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
    Inventors: Shoichi Iizuka, Takeshi Nakayama, Naoki Honma
  • Publication number: 20220233103
    Abstract: An estimation device includes: M transmission antenna elements each transmitting a first transmission signal; N transmitter-receivers each including a reception antenna element and receiving, over a predetermined period, a first reception signal including a reflection signal that is the first transmission signal reflected by a first living body, using the reception antenna element; a memory storing training signals that are second reception signals obtained by causing the N transmitter-receivers to preliminarily receive second reception signals including reflection signals that are second transmission signals transmitted from the M transmission antenna elements to a second living body and reflected therefrom; a first vector calculator calculating a first vector for each training signal and each first reception signal by respective predetermined methods; and a circuit identifying the first living body or estimating an orientation of the first living body by a predetermined method, using correlation coefficient
    Type: Application
    Filed: December 28, 2020
    Publication date: July 28, 2022
    Inventors: Takeshi NAKAYAMA, Shoichi IIZUKA, Naoki HONMA, Nobuyuki SHIRAKI, Teppei HAYASHI, Kazuki NUMAZAKI
  • Publication number: 20220227998
    Abstract: This mixed suspension contains (1) a dispersant, (2) a cellulose nanofiber, and (3) a filler.
    Type: Application
    Filed: June 17, 2020
    Publication date: July 21, 2022
    Applicant: NIPPON PAPER INDUSTRIES CO., LTD.
    Inventors: Takeshi NAKAYAMA, Makoto MATSUMOTO, Shinji SATO
  • Publication number: 20220221549
    Abstract: A sensor includes: a living body component extractor that receives a signal transmitted from each transmitting station and influenced by a living body, and extracts a signal component influenced by the living body; a position spectrum function calculator that calculates as many position spectrum functions as the number of combinations of transmitting stations and receiving stations, the position spectrum functions each being calculated from the signal component and corresponding to a likelihood of a position of the living body; a weight function calculator that calculates as many weight functions as the number of combinations, the weight functions each representing reliability of a position spectrum function; an integrated position spectrum function calculator that outputs an integrated position spectrum function using the position spectrum functions and the weight functions; and a position estimator that estimates the position of the living body by detecting a maximum value from the integrated position spect
    Type: Application
    Filed: December 28, 2020
    Publication date: July 14, 2022
    Inventors: Shoichi IIZUKA, Takeshi NAKAYAMA, Naoki HONMA, Nobuyuki SHIRAKI
  • Publication number: 20220214421
    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.
    Type: Application
    Filed: February 17, 2021
    Publication date: July 7, 2022
    Inventors: Shoichi IIZUKA, Takeshi NAKAYAMA, Naoki HONMA, Nobuyuki SHIRAKI
  • Patent number: 11255955
    Abstract: An estimation method according to the present disclosure includes: extracting, from a plurality of calculated complex transfer functions, living body components respectively corresponding to N reception antenna elements and affected by a living body; calculating a correlation matrix based on the extracted living body components respectively corresponding to the N reception antenna elements; computing one or more eigenvalues of the calculated correlation matrix; estimating a credibility of an estimation result of estimating the position or the direction of a living body in a target space, using the one or more computed eigenvalues and living body count information indicating a value indicating a total number of living bodies in the target space; and estimating the position or the direction of the living body via a predetermined method, based on the correlation matrix, according to the credibility of the estimation result.
    Type: Grant
    Filed: December 9, 2019
    Date of Patent: February 22, 2022
    Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
    Inventors: Shoichi Iizuka, Takeshi Nakayama, Naoki Honma, Nobuyuki Shiraki
  • Publication number: 20220018936
    Abstract: A sensor includes: a correlation matrix calculator which calculates a correlation matrix from biological information extracted using reception signals obtained by receiving, in a predetermined period, signals transmitted to a predetermined space; a first number information calculator which calculates first number information; a MUSIC spectrum calculator which estimates a candidate of a position of at least one living body and outputs a likelihood spectrum; and a second number information calculator which estimates a position or second number information, which is a total number of living bodies with an increased degree of likelihood, from first position information possibly including a plurality of position candidates.
    Type: Application
    Filed: February 25, 2020
    Publication date: January 20, 2022
    Inventors: Shoichi IIZUKA, Takeshi NAKAYAMA, Naoki HONMA, Kazuki NUMAZAKI, Nobuyuki SHIRAKI
  • Patent number: 11226408
    Abstract: A sensor includes: a transmission signal generator including N transmission antenna elements that respectively transmit N transmission signals to a predetermined range in which a living body is possibly present, where N is a natural number greater than or equal to 3; a receiver including M reception antenna elements that respectively receive N reception signals including one or more reflected signals, where M is a natural number greater than or equal to 3, the one or more reflected signals being one or more of the N transmission signals transmitted by the N transmission antenna elements that is reflected or scattered by the living body; circuitry; and memory. The circuitry estimates traveling of the living body, and/or the posture and/or action of the living body at the position of the living body.
    Type: Grant
    Filed: June 27, 2019
    Date of Patent: January 18, 2022
    Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
    Inventors: Takeshi Nakayama, Shoichi Iizuka, Naoki Honma, Dai Sasakawa
  • Patent number: 11175380
    Abstract: An estimating device includes: a transmission antenna; a transmission signal generator that generates a multicarrier signal; a transmitter that outputs the multicarrier signal to the transmission antenna; a reception antenna; a receiver that measures reception signals including a reflected signal which is the transmitted multicarrier signal that has been reflected or dispersed by the moving body; a complex transfer function calculator that calculates, from the measured reception signals, a plurality of complex transfer functions indicating propagation characteristics between a transmission antenna element and a reception antenna element; a moving body correlation matrix calculator that calculates, for each of subcarriers, a moving body correlation matrix from the complex transfer functions; a subcarrier integrator that integrates the moving body correlation matrices; and an estimation processor that estimates the direction or position in which the moving body is present, using the integrated moving body corre
    Type: Grant
    Filed: March 12, 2019
    Date of Patent: November 16, 2021
    Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
    Inventors: Shoichi Iizuka, Takeshi Nakayama, Naoki Honma
  • Patent number: 11163057
    Abstract: An estimation device includes: a living body information extraction unit that extracts living body information which is a component corresponding to one or more living bodies in a space; an eigenvector calculation unit that calculates one or more eigenvectors of a living body correlation matrix obtained from the living body information; a first position estimation unit that estimates, using the living body correlation matrix, positions of the one or more living bodies and at least one false image, according to a predetermined position estimation method; a second steering vector output unit that extracts, from first steering vectors stored in a storage, and outputs as second steering vectors, first steering vectors corresponding to the positions estimated; and a second position estimation unit that estimates at least one of the position and the number of the one or more living bodies, using the one or more eigenvectors and the second steering vectors.
    Type: Grant
    Filed: April 19, 2019
    Date of Patent: November 2, 2021
    Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
    Inventors: Shoichi Iizuka, Takeshi Nakayama, Naoki Honma, Nobuyuki Shiraki
  • Patent number: 11047968
    Abstract: Complex transfer functions indicating characteristics of propagation between transmission antenna elements and N reception antenna elements are calculated from reception signals received by the N reception antenna elements during a predetermined period. Components affected by vital activity are extracted from the calculated complex transfer functions. A correlation matrix is calculated from changed components affected by vital activity. A steering vector for regions divided from a target region is calculated. A living-body signal intensity vector is estimated by performing compressed sensing for an unknown value that is the living-body signal intensity vector using a correlation matrix vector and an extended steering vector.
    Type: Grant
    Filed: December 12, 2019
    Date of Patent: June 29, 2021
    Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
    Inventors: Shoichi Iizuka, Takeshi Nakayama, Naoki Honma, Dai Sasakawa, Nobuyuki Shiraki, Kazuki Numazaki
  • Publication number: 20210179738
    Abstract: Oxidized cellulose nanofibers wherein an aqueous dispersion of the oxidized cellulose nanofibers which has undergone concentration adjustment has a retention of a viscosity of 50% or higher measured immediately after 30-minute stirring with Disper at a rotation speed of 1,000 rpm, with respect to the viscosity of the aqueous dispersion of the oxidized cellulose nanofibers measured immediately after the concentration adjustment.
    Type: Application
    Filed: August 21, 2019
    Publication date: June 17, 2021
    Applicant: NIPPON PAPER INDUSTRIES CO., LTD.
    Inventors: Makoto MATSUMOTO, Takeshi NAKAYAMA, Naoyuki TAMURA