Motion analysis system and azimuth tuning method

Abstract

A motion analysis system includes an analysis control device that analyzes a motion of a measurement target using measurement data from a plurality of measurement units including an angular velocity sensor, and the analysis control device receives measurement data based on a first rotational motion around a first rotation axis of the measurement target from the plurality of measurement units when an axis intersecting a perpendicular line with respect to a first plane in a space including the measurement target is set as the first rotation axis, and tunes azimuths on the first plane in the plurality of measurement units using the measurement data based on the first rotational motion.

1 . A motion analysis system comprising an analysis control device that analyzes a motion of a measurement target using measurement data from a plurality of measurement units including an angular velocity sensor,
 wherein the analysis control device receives measurement data based on a first rotational motion around a first rotation axis of the measurement target from the plurality of measurement units, and tunes azimuths on a first plane in the plurality of measurement units using the measurement data based on the first rotational motion.   
     
     
         2 . The motion analysis system according to  claim 1 , wherein the first rotation axis is an axis intersecting a perpendicular line with respect to the first plane. 
     
     
         3 . The motion analysis system according to  claim 1 , wherein a first transform expression including information of the first rotation axis is acquired for each measurement unit, and
 wherein the azimuths on the first plane in the plurality of measurement units are tuned using the first transform expressions.   
     
     
         4 . The motion analysis system according to  claim 1 , wherein the first plane is a horizontal plane. 
     
     
         5 . The motion analysis system according to  claim 4 , wherein each of the plurality of measurement units includes an acceleration sensor, and
 wherein the analysis control device tunes the azimuths in an elevation angle direction about the first plane in the plurality of measurement units using information of a gravitational acceleration included in the measurement data of the acceleration sensors when the measurement target stops.   
     
     
         6 . The motion analysis system according to  claim 1 , wherein the analysis control device receives measurement data based on a second rotational motion around a second rotation axis of the measurement target from the plurality of measurement units when an axis intersecting a perpendicular line with respect to a second plane perpendicular to the first plane is set as the second rotation axis, and tunes azimuths on the second plane in the plurality of measurement units using the measurement data based on the second rotational motion. 
     
     
         7 . The motion analysis system according to  claim 1 , wherein the measurement units are attached to at least one of exercise equipment and a test subject. 
     
     
         8 . The motion analysis system according to  claim 1 , wherein the analysis control device uses at least a part of a swing motion as the first rotational motion. 
     
     
         9 . The motion analysis system according to  claim 1 , wherein the motion analysis system includes the plurality of measurement units. 
     
     
         10 . An azimuth tuning method comprising:
 receiving measurement data based on a first rotational motion around a first rotation axis of a measurement target from a plurality of measurement units including an angular velocity sensor; and   tuning azimuths on a first plane in the plurality of measurement units using the measurement data based on the first rotational motion.