US 11,925,458 B2
Motion state monitoring system, training support system, motion state monitoring method, and program
Makoto Kobayashi, Nisshin (JP); Toru Miyagawa, Seto (JP); Issei Nakashima, Toyota (JP); Keisuke Suga, Nagoya (JP); Masayuki Imaida, Ichinomiya (JP); Manabu Yamamoto, Toyota (JP); Yohei Otaka, Kariya (JP); Masaki Katoh, Nagoya (JP); Asuka Hirano, Toyota (JP); and Taiki Yoshida, Nagoya (JP)
Assigned to TOYOTA JIDOSHA KABUSHIKI KAISHA, Toyota (JP)
Filed by Toyota Jidosha Kabushiki Kaisha, Toyota (JP)
Filed on Aug. 13, 2021, as Appl. No. 17/401,940.
Claims priority of application No. 2020-138240 (JP), filed on Aug. 18, 2020.
Prior Publication US 2022/0054045 A1, Feb. 24, 2022
Int. Cl. A61B 5/11 (2006.01); A61B 5/00 (2006.01); G16H 40/63 (2018.01)
CPC A61B 5/1114 (2013.01) [A61B 5/6831 (2013.01); A61B 5/684 (2013.01); G16H 40/63 (2018.01); A61B 5/0004 (2013.01); A61B 2505/09 (2013.01)] 11 Claims
OG exemplary drawing
 
1. A method comprising:
acquiring, by a processor, sensing information of a sensor attached to a target part of a body of a subject, the sensing information including quaternion information;
detecting, by the processor, an attaching direction of the sensor based on the sensing information with respect to a reference direction defined based on the target part, wherein the reference direction remains the same relative to the target part when a position of the sensor with respect to the target part changes, the reference direction defined as an axial direction of a band attached to the target part;
executing, by the processor, tagging processing for associating the attaching direction of the sensor with sensing-related information related to the sensing information, the sensing-related information including the sensing information and information obtained by converting the quaternion information into rotation angle information;
calculating, by the processor, a motion state of the target part based on the sensing-related information tagged with the attaching direction;
outputting, by the processor, the calculated motion state of the target part with an indication of relation to the attaching directions;
determining, by the processor, that an attaching direction changing event has occurred based on a difference of attaching directions measured before and after a predetermined timing; and
updating, by the processor, based on determining that the attaching direction changing event has occurred, the attaching direction of the sensor.