Motion Analysis Device

Abstract

A motion analysis device includes an observation data acquisition unit that acquires observation data indicating a trajectory of a target observation point which moves in conjunction with motion of a user (for example, a specified point in a club used by the user); a comparison unit that compares each of a plurality of reference data indicating a predetermined trajectory of the target observation point with the observation data acquired by the observation data acquisition unit; and an audio control unit that generates an audio signal according to a comparison result obtained by using the comparison unit.

What is claimed is: 
     
         1 . A motion analysis device comprising:
 at least one processor; and   at least one memory including computer program instructions, the at least one memory and the computer program instructions being configured to, in cooperation with the at least one processor, cause the motion analysis device to:   acquire observation data indicating a trajectory of a target observation point which moves in conjunction with motion of a user;   compare reference data indicating a predetermined trajectory with the observation data to generate a comparison result; and   generate an audio signal according to the comparison result.   
     
     
         2 . The motion analysis device according to  claim 1 , wherein the at least one memory and the computer program instructions are configured to cause the motion analysis device further to delay an output of the audio signal. 
     
     
         3 . The motion analysis device according to  claim 1 , wherein time series of the reference data is expanded or contracted on a time axis and each expanded or contracted reference data is compared with the observation data. 
     
     
         4 . The motion analysis device according to  claim 1 , wherein, according to a degree of approximation between a trajectory specified by the observation data and the predetermined trajectory, an additional audio signal is generated in which predetermined sound effects are added to the audio signal according to the comparison result. 
     
     
         5 . The motion analysis device according to  claim 1 , wherein, according to the comparison result, a pitch in the audio signal is changed. 
     
     
         6 . The motion analysis device according to  claim 1 , wherein:
 a pitch in the audio signal is raised when a trajectory of the target observation point is closer to the user than a reference trajectory obtained based on the reference data; and   the pitch in the audio signal is lowered when the trajectory of the target observation point is farther from the user than the reference trajectory.   
     
     
         7 . The motion analysis device according to  claim 1 , further comprising a storage device which stores mutually different audio data items by corresponding to components in X-axis, Y-axis and Z-axis directions which configure the observation data and the reference data, wherein the at least one memory and the computer program instructions are configured to cause the motion analysis device further to
 compare the observation data with the reference data for each component in the X-axis, Y-axis and Z-axis directions, select the audio data corresponding to the component in the X-axis, Y-axis or Z-axis direction according to a comparison result of each component in the X-axis, Y-axis and Z-axis directions, read the audio data out from the storage device, and output an audio signal according to the selected audio data.   
     
     
         8 . The motion analysis device according to  claim 1 , wherein motion of the user is a golf swing. 
     
     
         9 . A motion analysis method performed by one or more processors comprising:
 causing an observation data acquisition unit to acquire observation data indicating a trajectory of a target observation point which moves in conjunction with motion of a user;   causing a comparison unit to compare reference data indicating predetermined trajectory with the observation data acquired by the observation data acquisition unit; and   causing an audio control unit to generate an audio signal according to a comparison result obtained by using the comparison unit.   
     
     
         10 . The motion analysis method according to  claim 9 , wherein an output of the audio signal generated by the audio control unit is delayed. 
     
     
         11 . The motion analysis method according to  claim 9 , further comprising causing the comparison unit to expand or contract time series of the reference data on a time axis and to compare each expanded or contracted reference data with the observation data. 
     
     
         12 . The motion analysis method according to  claim 9 , further comprising causing the audio control unit to generate an audio signal in which predetermined sound effects are added to the audio signal according to the comparison result obtained by using the comparison unit, according to a degree of approximation between a trajectory specified by the observation data and the predetermined trajectory. 
     
     
         13 . The motion analysis method according to  claim 9 , further comprising causing the audio control unit to change a pitch in the audio signal according to a comparison result obtained by using the comparison unit. 
     
     
         14 . The motion analysis method according to  claim 9 , further comprising:
 causing the audio control unit to raise a pitch in the audio signal when a trajectory of the target observation point is closer to the user than a reference trajectory obtained based on the reference data; and   causing the audio control unit to lower the pitch in the audio signal when the trajectory of the target observation point is farther from the user than the reference trajectory.   
     
     
         15 . The motion analysis method according to  claim 9 , further comprising:
 storing mutually different audio data items in a storage unit by corresponding to components in X-axis, Y-axis and Z-axis directions which configure the observation data and the reference data;   comparing the observation data with the reference data for each component in the X-axis, Y-axis and Z-axis directions;   selecting the audio data corresponding to the component in the X-axis, Y-axis or Z-axis direction according to a comparison result of each component in the X-axis, Y-axis and Z-axis directions and reading out the audio data from the storage means; and   outputting an audio signal according to the selected audio data.   
     
     
         16 . The motion analysis method according to  claim 9 , wherein motion of the user is a golf swing.