公开(公告)号：US20220240813A1

公开(公告)日：2022-08-04

申请号：US17572872

申请日：2022-01-11

Applicant: NEC Corporation

Inventor： Hiroshi KAJITANI

IPC: A61B5/11 ,  A61B5/00

Abstract: A step width measurement device includes a distance calculation unit that calculates a distance between both feet of a user by using propagation data related to transmission/reception times of ultrasonic waves transmitted/received by ultrasonic transmission/reception devices mounted on each of the both feet of the user, a height calculation unit that calculates a height of a sensor by using sensor data including a spatial acceleration and a spatial angular velocity measured by sensors mounted on each of the both feet of the user, and a step width calculation unit that calculates a step width of the user by using the distance between the both feet measured at the same timing and the height of the sensor.

公开(公告)号：US20210345960A1

公开(公告)日：2021-11-11

申请号：US17283989

申请日：2018-10-17

Applicant: NEC Corporation

Inventor： Chenhui HUANG ,  Kenichiro FUKUSHI ,  Hiroshi KAJITANI ,  Kentaro NAKAHARA ,  Takeo NOZAKI

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

Abstract: A body weight estimation device includes: a data reception unit that receives gait data including the gait characteristics of a walking person; a first calculation unit that extracts a feature quantity based on the gait characteristics of the walking person from the gait data; a second calculation unit that generates a learning model by learning a correlation between the feature quantity extracted by the first calculation unit and body weight information about the walking person, using the gait data as sample data; and an estimation unit that estimates the body weight information associated with the gait data of an estimation target by inputting the gait data of the estimation target to the learning model.

公开(公告)号：US20250114018A1

公开(公告)日：2025-04-10

申请号：US18729202

申请日：2022-02-17

Applicant: NEC Corporation

Inventor： Yoshitaka NOZAKI ,  Chenhui HUANG ,  Kenichiro FUKUSHI ,  Zhenwei WANG ,  Fumiyuki NIHEY ,  Hiroshi KAJITANI ,  Kentaro NAKAHARA

IPC: A61B5/11

Abstract: A detection device that includes an acquisition unit that acquires data including a dorsiflexion peak time, a plantarflexion peak time, and travel direction acceleration acquired from sensor data regarding a movement of a foot, a candidate detection unit that detects, as a candidate time for heel strike, a time of a feature signal point extracted from time-series data of the travel direction acceleration in an investigation time period starting from an acceleration peak time detected from the travel direction acceleration based on the dorsiflexion peak time, and an output unit that outputs the detected candidate time as a heel strike time.

公开(公告)号：US20250068923A1

公开(公告)日：2025-02-27

申请号：US18726466

申请日：2022-01-24

Applicant: NEC CORPORATION

Inventor： Kenichiro FUKUSHI ,  Hiroshi KAJITANI ,  Fumiyuki NIHEY ,  Chenhui HUANG ,  Kazuki IHARA ,  Zhenwei WANG ,  Yoshitaka NOZAKI ,  Kentaro NAKAHARA

IPC: G06N3/094 ,  G06N3/045

Abstract: A machine learning device that trains a first encoding model for encoding first sensor data into first code, a second encoding model for encoding second sensor data into second code, and an estimation model for making estimation using the first code and the second code such that an estimation result from the estimation model conforms to correct answer data, trains a first adversarial estimation model that outputs an estimated value of the second code in response to the input of the first code such that the estimated value of the second code estimated by the first adversarial estimation model conforms to the second code outputted from the second encoding model, and trains the first encoding model such that the estimated value of the second code estimated by the first adversarial estimation model does not conform to the second code outputted from the second encoding model.

公开(公告)号：US20250046464A1

公开(公告)日：2025-02-06

申请号：US18716641

申请日：2021-12-27

Applicant: NEC Corporation

Inventor： Chenhui HUANG ,  Fumiyuki NIHEY ,  Zhenwei WANG ,  Hiroshi KAJITANI ,  Yoshitaka NOZAKI ,  Kenichiro FUKUSHI

IPC: G16H50/30

Abstract: Provided is a static balance estimation device that includes a data acquisition unit that acquires feature amount data that include a feature amount to be used for estimating static balance of a user, the feature amount being extracted from a feature of a gait of the user, a storage unit that stores an estimation model that outputs a static balance index related to input of the feature amount data, an estimation unit that inputs the acquired feature amount data into the estimation model and estimates the static balance of the user according to the static balance index output by the estimation model, and an output unit that outputs information related to the estimated static balance of the user.

公开(公告)号：US20250040831A1

公开(公告)日：2025-02-06

申请号：US18716606

申请日：2021-12-27

Applicant: NEC Corporation

Inventor： Chenhui HUANG ,  Fumiyuki NIHEY ,  Zhenwei WANG ,  Hiroshi KAJITANI ,  Yoshitaka NOZAKI ,  Kenichiro FUKUSHI

IPC: A61B5/11

Abstract: Provided is a mobility estimation device that includes a data acquisition unit that acquires feature amount data including a feature amount used for estimating a mobility of a user, the feature amount data being extracted from sensor data regarding a movement of a foot of the user, a storage unit that stores an estimation model that outputs a mobility index based on an input of the feature amount data, an estimation unit that inputs the acquired feature amount data to the estimation model and estimates the mobility of the user in accordance with the mobility index output from the estimation model, and an output unit that outputs information regarding the estimated mobility of the user.

公开(公告)号：US20240148278A1

公开(公告)日：2024-05-09

申请号：US18411324

申请日：2024-01-12

Applicant: NEC Corporation

Inventor： Chenhui HUANG ,  Kenichiro FUKUSHI ,  Zhenwei WANG ,  Hiroshi KAJITANI ,  Fumiyuki NIHEY ,  Kentaro NAKAHARA

IPC: A61B5/11 ,  A61B5/107

CPC classification number: A61B5/112 ,  A61B5/1074

Abstract: An estimation device that includes a detection unit that detects a terminal stance period from time-series data of sensor data based on a physical quantity related to movement of a foot measured by a sensor provided at a foot portion, a feature amount extraction unit that extracts a feature amount from an angular waveform in a coronal plane during the terminal stance period, and a presumption unit that estimates a degree of pronation/supination of the foot by using the feature amount extracted from the angular waveform in the coronal plane.

公开(公告)号：US20230188601A1

公开(公告)日：2023-06-15

申请号：US17767504

申请日：2019-10-21

Applicant: NEC Corporation

Inventor： Hiroshi KAJITANI ,  Toshinori TAKEMURA ,  Kentaro NAKAHARA ,  Hannah POKKA ,  Itumi HANEDA ,  Akira KAMEI ,  Kenichiro FUKUSHI ,  Chenhui HUANG ,  Zhenwei WANG ,  Yuka IMAI ,  Koichi MORIKAWA ,  Hiroshi OKUDA ,  Hiroaki NAKANO

IPC: H04L67/12 ,  G01C22/00

CPC classification number: H04L67/12 ,  G01C22/006

Abstract: A mobile terminal detects a self-device being located at a predetermined location, and stops reception of sensing information from a module device that transmits the sensing information, if being located at the predetermined location is detected. A fixed device receives the sensing information from the module device, and transmits the sensing information to a cloud server.

公开(公告)号：US20220391609A1

公开(公告)日：2022-12-08

申请号：US17770472

申请日：2019-10-31

Applicant: NEC Corporation

Inventor： Kenichiro FUKUSHI ,  Zhenwei WANG ,  Hiroaki NAKANO ,  Toshinori TAKEMURA ,  Kentaro NAKAHARA ,  Hannah POKKA ,  ltsumi KATO ,  Akira KAMEI ,  Chenhui HUANG ,  Hiroshi KAJITANI ,  Koichi MORIKAWA ,  Hiroshi OKUDA

IPC: G06K7/14

Abstract: An information processing system includes an identification unit configured to identify unique information on shoes using at least part of a captured image of the shoes, and a setting unit configured to set an association between an acquisition device configured to acquire the unique information and a module device attached to the shoes based on the unique information.

公开(公告)号：US20210401325A1

公开(公告)日：2021-12-30

申请号：US17294490

申请日：2018-11-20

Applicant: NEC Corporation

Inventor： Kenichiro FUKUSHI ,  Kentaro NAKAHARA ,  Hiroshi KAJITANI ,  Chenhui HUANG

IPC: A61B5/11 ,  A61B5/00

Abstract: A gait measurement system includes: a locus calculation device that detects at least one gait phase from acceleration data measured by an inertial measurement unit, calculates velocity data by subjecting the acceleration data to time integration, calculates correction amounts associated with each of the gait phases using the gait phases and the velocity data, calculates correction velocity data by subtracting the correction amounts from the velocity data associated with each of the gait phases, and calculates locus data by subjecting the calculated correction velocity data to time integration; and an index calculation device that calculates a gait index, using the locus data calculated by the locus calculation device.