公开(公告)号：US20230112078A1

公开(公告)日：2023-04-13

申请号：US18053123

申请日：2022-11-07

Applicant: Osaka University ,  ORPHE Inc.

Inventor： Ken NAKATA ,  Issei OGASAWARA ,  Yuya KIKUKAWA ,  Asumi KOBAYASHI ,  Yuki UNO

IPC: G01P15/18 ,  G06F3/01 ,  G01P15/16

Abstract: Disclosed are a ground reaction force index estimation system, a ground reaction force index estimation method, and a ground reaction force index estimation program that can compute ground reaction force indices at low computation costs. The ground reaction force index estimation system comprises footwear and an external device connected to the footwear. The footwear comprises a wearable sensor that measures triaxial acceleration and/or triaxial angular velocity and a computation unit that computes ground reaction force indices by multiple regression analysis from values computed from the measurement results to be used as explanatory variables. The external device comprises a controller that evaluates walking and running motions for the user on the basis of the measurement results by the wearable sensor received from the footwear, the computed ground reaction force indices, and the determination reference information and a presentation unit that presents the results of the evaluation of the running motion.

公开(公告)号：US20230380755A1

公开(公告)日：2023-11-30

申请号：US18032169

申请日：2021-10-19

Applicant: OSAKA UNIVERSITY

Inventor： Issei OGASAWARA ,  Ken NAKATA

IPC: A61B5/00 ,  A61B5/11

CPC classification number: A61B5/4528 ,  A61B5/1121 ,  A61B2562/0219

Abstract: A joint evaluation apparatus includes an inertial sensor unit that is attached in a vicinity of a joint with joint axes of the joint to connect bones on both sides parallel to a detection axis and detects motion of a bone of a joint axis of which a range of motion of joint movement is limited, among the joint axes, as a waveform signal, a load detection unit that detects a load applied to the joint, a data obtaining unit that, when detecting generation of the load, obtains the waveform signal to be detected by the inertial sensor unit, in a time direction and an intensity direction, and a feature amount calculation unit that analyzes the waveform signal and calculates a feature amount that evaluates movement quality of the joint.