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 |
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.
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