公开(公告)号：US12123742B2

公开(公告)日：2024-10-22

申请号：US17436210

申请日：2019-03-27

Applicant: NEC Corporation

Inventor： Noriyuki Tonouchi ,  Kazuki Ihara ,  Chenhui Huang ,  Kenichiro Fukushi

IPC: A61B5/11 ,  G01C23/00 ,  G01D1/12 ,  G01D1/16 ,  G01D1/18

CPC classification number: G01C23/00 ,  A61B5/1123 ,  G01D1/12 ,  G01D1/16 ,  G01D1/18

Abstract: A walk discrimination device includes: a data reception unit that receives sensor data including an acceleration and an angular velocity acquired by a sensor installed in a shoe; an acceleration determination unit that determines whether the acceleration included in the sensor data is positive or negative; an attitude angle calculation unit that calculates an attitude angle by use of the acceleration and the angular velocity included in the sensor data; an attitude angle determination unit that determines whether the attitude angle calculated by the attitude angle calculation unit has exceeded a threshold, and determines whether a peak of the attitude angle has been detected; a walk discrimination unit that discriminates a walk based on a determination order by the acceleration determination unit and the attitude angle determination unit; and an output unit that outputs a discrimination result by the walk discrimination unit.

公开(公告)号：US11383984B2

公开(公告)日：2022-07-12

申请号：US16754597

申请日：2017-10-10

Applicant: NEC CORPORATION

Inventor： Kazuki Ihara ,  Mayumi Kosaka ,  Ryota Yuge ,  Hideaki Numata ,  Fumiyuki Nihey

IPC: C01B32/172 ,  B01D47/00

Abstract: A nanocarbon separation device includes a separation tank which is configured to accommodate a dispersion liquid including a nanocarbon, a first electrode that is provided at an upper part in the separation tank, a second electrode that is provided at a lower part in the separation tank, and a partition member that is provided between the first electrode and the second electrode in the separation tank, and the partition member partitions the separation tank into a plurality of regions.

公开(公告)号：US20240277259A1

公开(公告)日：2024-08-22

申请号：US18410586

申请日：2024-01-11

Applicant: NEC Corporation

Inventor： Fumiyuki NIHEY ,  Chenhui Huang ,  Kazuki Ihara ,  Hiroshi Kajitani

IPC: A61B5/11 ,  A61B5/00 ,  A61B5/103

CPC classification number: A61B5/112 ,  A61B5/1038 ,  A61B5/6807 ,  A61B5/7267

Abstract: Provided is a gait index calculation device that includes a communication unit that receives sensor data based on spatial acceleration and spatial angular velocity that are measured at a frequency lower than a normal measurement frequency, an interpolation unit that interpolates the sensor data using a predetermined interpolation method, a gait index calculation unit that calculates a gait index using the interpolated sensor data, and an output unit that outputs the calculated gait index.

公开(公告)号：US20230329586A1

公开(公告)日：2023-10-19

申请号：US18129387

申请日：2023-03-31

Applicant: NEC Corporation

Inventor： Zhenwei WANG ,  Kenichiro Fukushi ,  Kazuki Ihara ,  Kentaro Nakahara ,  Fumiyuki Nihey ,  Hiroshi Kajitani ,  Chenhui Huang ,  Yoshitaka Nozaki

IPC: A61B5/11 ,  A61B5/00

CPC classification number: A61B5/112 ,  A61B5/1128 ,  A61B5/1114 ,  A61B5/742

Abstract: Provided is a gait information generation device including an acquisition unit that acquires waist position information including time-series data of a waist position of a subject in a predetermined gait cycle, a waist oscillation calculation unit that calculates, for a plurality of gait phases included in the predetermined gait cycle, a waist oscillation corresponding to a distance between a reference line set for the time-series data of the waist position of the subject and the waist position in each of the plurality of gait phases, a gait information generation unit that generates gait information according to the waist oscillation calculated with respect to the predetermined gait cycle, and an output unit that outputs the generated gait information.

公开(公告)号：US11440025B2

公开(公告)日：2022-09-13

申请号：US16758320

申请日：2017-10-26

Applicant: NEC Corporation

Inventor： Kazuki Ihara

IPC: B03C5/02 ,  C01B32/172 ,  C01B32/174 ,  B82Y40/00

Abstract: A nanocarbon separation device includes a separation tank that is configured to accommodate a dispersion liquid including nanocarbons, a first electrode that is provided at an upper part in the separation tank, a second electrode that is provided at a lower part in the separation tank, an evaluation unit that is configured to evaluate a physical state or a chemical state of the dispersion liquid, and a fractionation unit that is configured to fractionate the dispersion liquid based on the physical state or the chemical state.

公开(公告)号：US20240237922A1

公开(公告)日：2024-07-18

申请号：US18409016

申请日：2024-01-10

Applicant: NEC Corporation

Inventor： Chenhui HUANG ,  Fumiyuki Nihey ,  Hiroshi Kajitani ,  Kazuki Ihara

IPC: A61B5/11 ,  A61B5/00

CPC classification number: A61B5/1117 ,  A61B5/112 ,  A61B5/6807 ,  A61B5/7282

Abstract: Provided is an estimation device including a data acquisition unit that acquires first feature amount data related to a physical ability measured according to a gait of a subject and attribute data of the subject, an estimation unit that constructs second feature amount data related to a physical ability factor and an attribute factor by performing principal component analysis on the acquired first feature amount data and the acquired attribute data, and estimates falling risk information according to a falling risk factor using the constructed second feature amount data, and an output unit that outputs the estimated falling risk information.

公开(公告)号：US20230397879A1

公开(公告)日：2023-12-14

申请号：US18203303

申请日：2023-05-30

Applicant: NEC Corporation

Inventor： Zhenwei WANG ,  Chenhui Huang ,  Kenichiro Fukushi ,  Kazuki Ihara ,  Fumiyuki Nihey ,  Hiroshi Kajitani ,  Yoshitaka Nozaki ,  Kentaro Nakahara

IPC: A61B5/00 ,  G16H40/63 ,  A61B5/11

CPC classification number: A61B5/4571 ,  G16H40/63 ,  A61B5/112 ,  A61B5/7278

Abstract: Provided is a pelvic inclination estimation device including a communication unit that acquires feature amount data including a feature amount to be used for estimation of a pelvic inclination, the feature amount being extracted from a gait waveform of a spatial acceleration and a spatial angular velocity included in sensor data related to movement of a foot of a subject, a storage unit that stores an estimation model that outputs an estimation value related to the pelvic inclination according to an input of the feature amount included in the feature amount data, an estimation unit that inputs a feature amount included in the acquired feature amount data to the estimation model and estimate a pelvic inclination of the subject according to the estimation value output from the estimation model, and an output unit that outputs information associated to the pelvic inclination of the subject.

公开(公告)号：US11745189B2

公开(公告)日：2023-09-05

申请号：US16758548

申请日：2017-10-26

Applicant: NEC CORPORATION

Inventor： Kazuki Ihara

IPC: B03C5/02 ,  C01B32/172 ,  C01B32/174 ,  B82Y40/00

CPC classification number: B03C5/02 ,  C01B32/172 ,  C01B32/174 ,  B03C2201/24 ,  B82Y40/00

Abstract: A nanocarbon separation device includes a separation tank that is configured to accommodate a dispersion liquid including nanocarbons, a first electrode provided at an upper part in the separation tank, a second electrode provided at a lower part in the separation tank, an evaluation unit that is configured to evaluate a physical state or a chemical state of the dispersion liquid, and a determination unit that is configured to determine a separation state between metallic nanocarbons and semiconducting nanocarbons included in the dispersion liquid from the physical state or the chemical state.

公开(公告)号：US11479469B2

公开(公告)日：2022-10-25

申请号：US17040315

申请日：2018-03-23

Applicant: NEC CORPORATION

Inventor： Kazuki Ihara

IPC: C01B32/174 ,  B82Y40/00

Abstract: Provided is a method for stably storing a nanocarbon dispersion liquid comprising a surfactant for a long period of time. One aspect of the present invention relates to a method for storing a nanocarbon dispersion liquid comprising a low-temperature storage step of storing the nanocarbon dispersion liquid at 10° C. or lower and/or a surfactant concentration adjustment step of adjusting a concentration of the surfactant in the nanocarbon dispersion liquid so as to be less than 100 times of a critical micelle concentration and equal to or more than the critical micelle concentration.

公开(公告)号：US20240188851A1

公开(公告)日：2024-06-13

申请号：US18411116

申请日：2024-01-12

Applicant: NEC Corporation

Inventor： Zhenwei WANG ,  Chenhui Huang ,  Kazuki Ihara ,  Kenichiro Fukushi ,  Fumiyuki Nihey ,  Hiroshi Kajitani ,  Yoshitaka Nozaki ,  Kentaro Nakahara

IPC: A61B5/11

CPC classification number: A61B5/1118 ,  A61B2562/0219

Abstract: Provided is a waist swinging estimation device including a communication unit that acquires feature amount data including a feature amount extracted from a gait waveform of a spatial acceleration and a spatial angular velocity included in sensor data regarding a movement of a foot of a subject and used for estimation of waist swinging that is an index regarding a movement of a waist, a storage unit that stores an estimation model that outputs an estimated value regarding the waist swinging according to an input of a feature amount included in the feature amount data, an estimation unit that inputs a feature amount included in the acquired feature amount data to the estimation model, and estimate waist swinging of the subject according to an estimated value regarding the waist swinging output from the estimation model, and an output unit that outputs information according to waist swinging of the subject.