Motion analysis method, motion analysis apparatus, and storage device

Abstract

A motion analysis apparatus includes an impact analysis unit that specifies an inclined angle with respect to a vertical plane of a hitting surface of an exercise appliance during impact by using an output signal from an inertial sensor, and a difference analysis unit that specifies a difference between a reference inclined angle acquired prior to the impact and the inclined angle.

What is claimed is: 
     
         1 . A motion analysis method comprising:
 specifying a difference between an inclined angle of a hitting surface of an exercise appliance during impact and a reference inclined angle which is acquired in advance by using an output signal from an inertial sensor.   
     
     
         2 . The motion analysis method according to  claim 1 ,
 wherein the exercise appliance is a golf club, and   wherein the reference inclined angle is a standard value of a loft angle of a club head.   
     
     
         3 . The motion analysis method according to  claim 1 ,
 wherein the reference inclined angle is specified by using an output signal from the inertial sensor when the exercise appliance is stopped.   
     
     
         4 . The motion analysis method according to  claim 1 ,
 wherein the inclined angle of the hitting surface and the reference inclined angle are displayed in a coordinate system.   
     
     
         5 . The motion analysis method according to  claim 4 ,
 wherein an image of the exercise appliance is displayed in the coordinate system in a superimposed manner in a front view of viewing a user handling the exercise appliance from the front side.   
     
     
         6 . The motion analysis method according to  claim 5 ,
 wherein the image of the exercise appliance is displayed at a predetermined position on a display screen, and   wherein a display position of the reference inclined angle is rotated by an angle which is the same as the difference so as to be displayed.   
     
     
         7 . The motion analysis method according to  claim 4 ,
 wherein an inclined angle of the hitting surface specified in the past is displayed in the coordinate system so as to be differentiated from an inclined angle of the hitting surface specified this time.   
     
     
         8 . The motion analysis method according to  claim 4 ,
 wherein a target region including the reference inclined angle is displayed so as to be differentiated from other regions.   
     
     
         9 . The motion analysis method according to  claim 8 ,
 wherein a ratio of the number of times in which an inclined angle of the hitting surface enters the target region to the number of exercises in which the inclined angle of the hitting surface is specified is displayed.   
     
     
         10 . A motion analysis method comprising:
 specifying a tangential direction during impact with respect to a movement trajectory of an exercise appliance projected onto a vertical plane by using an output signal from an inertial sensor; and   specifying an intersection angle between a target direction projected onto the vertical plane and the tangential direction.   
     
     
         11 . A motion analysis apparatus comprising:
 an impact analysis unit that specifies an inclined angle of a hitting surface of an exercise appliance during impact by using an output signal from an inertial sensor; and   a difference analysis unit that specifies a difference between the inclined angle of the hitting surface and a reference inclined angle which is acquired in advance.   
     
     
         12 . The motion analysis apparatus according to  claim 11 ,
 wherein the exercise appliance is a golf club, and   wherein the reference inclined angle is a standard value of a loft angle of a golf club.   
     
     
         13 . The motion analysis apparatus according to  claim 12 ,
 wherein the reference inclined angle is specified by using an output signal from the inertial sensor when the exercise appliance is stopped.   
     
     
         14 . The motion analysis apparatus according to  claim 12 ,
 wherein the inclined angle of the hitting surface and the reference inclined angle are displayed in a coordinate system.   
     
     
         15 . The motion analysis apparatus according to  claim 14 ,
 wherein an image of the exercise appliance is displayed in the coordinate system in a superimposed manner in a front view of viewing a user handling the exercise appliance from the front side.   
     
     
         16 . The motion analysis apparatus according to  claim 15 ,
 wherein the image of the exercise appliance is displayed at a predetermined position on a display screen, and   wherein a display position of the reference inclined angle is rotated by an angle which is the same as the difference so as to be displayed.   
     
     
         17 . The motion analysis apparatus according to  claim 15 ,
 wherein an inclined angle of the hitting surface specified in the past is displayed in the coordinate system so as to be differentiated from an inclined angle of the hitting surface specified this time.   
     
     
         18 . A motion analysis apparatus comprising:
 an impact analysis unit that specifies a tangential direction during impact with respect to a movement trajectory of an exercise appliance projected onto a vertical plane by using an output signal from an inertial sensor; and   an intersection angle analysis unit that specifies an intersection angle between a target direction projected onto the vertical plane and the tangential direction.   
     
     
         19 . A storage device storing a motion analysis program causing a computer to execute:
 specifying an inclined angle of a hitting surface of an exercise appliance during impact by using an output signal from an inertial sensor; and   specifying a difference between the inclined angle of the hitting surface and a reference inclined angle which is acquired in advance.   
     
     
         20 . A storage device storing a motion analysis program causing a computer to execute:
 specifying a tangential direction during impact with respect to a movement trajectory of an exercise appliance projected onto a vertical plane by using an output signal from an inertial sensor; and   specifying an intersection angle between a target direction projected onto the vertical plane and the tangential direction.