MOTION ANALYSIS METHOD, MOTION ANALYSIS PROGRAM, STORAGE MEDIUM THEREOF, MOTION ANALYSIS APPARATUS, AND MOTION ANALYSIS SYSTEM

• US 20170203211A1
• Filed: 12/22/2016
• Published: 07/20/2017
• Est. Priority Date: 01/15/2016
• Status: Abandoned Application

• Current Assignee: Seiko Epson Corporation (Seiko Group)
• Original Assignee: Seiko Epson Corporation (Seiko Group)
• Inventors: KIRYU, Akira, YOSHIKAZU, Yamada, ITO, Tsuyoshi, HAGIWARA, Norihisa, ITO, Kazuhiro, KODAIRA, Kenya
• Application Number:
  US15/388,748
• Publication Number:
  US 20170203211A1
• Time in Patent Office: Days
• CPC Class Codes: A61B 2562/0219 Inertial sensors, e.g. accelerometers, gyroscopes, tilt switches
• CPC Class Codes: A61B 5/0002 Remote monitoring of patients using telemetry, e.g. transmission of vital signals via a communication network A61B5/07 takes precedence; transmission systems for measured values G08C; transmission H04B; transmission of digital information H04L; wireless communication networks H04W
• CPC Class Codes: A61B 5/1122 of movement trajectories
• CPC Class Codes: A61B 5/6895 Sport equipment
• CPC Class Codes: A61B 5/7264 Classification of physiological signals or data, e.g. using neural networks, statistical classifiers, expert systems or fuzzy systems neural networks per se G06N3/00; expert systems per se G06N5/00
• CPC Class Codes: A63B 24/0006 Computerised comparison for qualitative assessment of motion sequences or the course of a movement
• CPC Class Codes: A63B 69/36 for golf
• CPC Class Codes: A63B 69/3623 for driving A63B69/3608, A63B69/3658, A63B69/3661, A63B69/3667 and A63B69/3691 take precedence
• CPC Class Codes: A63B 71/06 Indicating or scoring devices for games or players , or for other sports activities
• CPC Class Codes: A63F 13/211 using inertial sensors, e.g. accelerometers or gyroscopes
• CPC Class Codes: A63F 13/213 comprising photodetecting means, e.g. cameras, photodiodes or infrared cells A63F13/219, A63F13/655 take precedence
• CPC Class Codes: A63F 13/40 Processing input control signals of video game devices, e.g. signals generated by the player or derived from the environment
• CPC Class Codes: A63F 13/812 Ball games, e.g. soccer or baseball
• CPC Class Codes: A63F 2300/8011 Ball
• CPC Class Codes: G06F 2218/10 by analysing the shape of a waveform, e.g. extracting parameters relating to peaks

Abstract

A motion analysis method includes calculating a level of a swing using an output from an inertial sensor measuring the swing of exercise equipment on the basis of a relationship between a first angle formed between a tangential direction of a swing trajectory of a ball hitting portion of the exercise equipment at impact and a target hitting direction, and a second angle formed between a direction orthogonal to a hitting surface of the ball hitting portion at the impact and the target hitting direction.

Claims

1. A motion analysis method comprising:

calculating a level of a swing using an output from an inertial sensor on the basis of a relationship between a first angle formed between a tangential direction of a swing trajectory of a ball hitting portion of an exercise equipment at impact and a target hitting direction, and a second angle formed between a direction orthogonal to a hitting surface of the ball hitting portion at the impact and the target hitting direction.

2. The motion analysis method according to claim 1,

wherein, in a case where an index related to the first angle is a first index, and an index related to the second angle is a second index, the level is calculated on the basis of the first index and the second index.

3. The motion analysis method according to claim 2,

wherein a score is specified using the first angle and the second angle calculated through measurement on the basis of a table in which a score is added to region in advance according to a relationship between the first index and the second index, and the score is calculated as the level.

4. The motion analysis method according to claim 3,

wherein, in a case where the target hitting direction is set to a +X direction of an X axis, a direction opposite to the gravitational direction is set to a +Z direction of a Z axis, and a direction orthogonal to the X axis and the Z axis is set to be along a Y axis;

in a case where, when the Y axis is a rotation axis, a direction in which +Z of the Z axis rotates in the +X direction of the X axis is defined as a first sign, and a sign reverse to the first sign is defined as a second sign, the first and second signs being related to the first angle; and

in a case where, when the Z axis is a rotation axis, a direction in which +Y of the Y axis rotates in the +X direction of the X axis is defined as a third sign, and a sign reverse to the third sign is defined as a fourth sign, the third and fourth signs being related to the second angle, in the table, a score is set for region in a coordinate system having the first index and the second index as two axes orthogonal to each other, and

wherein a score added to the region specified by the first angle and the second angle which are calculated through the measurement is output.

5. The motion analysis method according to claim 4,

wherein the first sign is a negative sign, the second sign is a positive sign, the third sign is a negative sign, and the fourth sign is a positive sign.

6. The motion analysis method according to claim 4,

wherein, in a case where a sign of the first angle is the second sign, the lowest score is calculated.

7. The motion analysis method according to claim 4,

wherein, in a case where a sign of the first angle is the first sign, and a sign of the second angle is the fourth sign, a lower score is calculated as an absolute value of the second angle becomes greater.

8. The motion analysis method according to claim 4,

wherein, in a case where a sign of the first angle is the first sign, a higher score is calculated as an absolute value of the first angle becomes smaller, and an absolute value of the second angle becomes smaller.

9. The motion analysis method according to claim 4,

wherein, in a case where a sign of the first angle is the first sign, and a sign of the second angle is the third sign, a lower score is calculated as an absolute value of the second angle becomes greater.

10. The motion analysis method according to claim 1, further comprising:

outputting information regarding the level.

11. The motion analysis method according to claim 1, further comprising:

performing diagnosis on the level; and

outputting diagnosis information based on the diagnosis.

12. The motion analysis method according to claim 11, further comprising:

outputting a practice method on the basis of the diagnosis information.

13. A recording medium recording a motion analysis program causing a computer to execute:

a procedure of calculating a level of a swing using an output from an inertial sensor on the basis of a relationship between a first angle formed between a tangential direction of a swing trajectory of a ball hitting portion of an exercise equipment at impact and a target hitting direction, and a second angle formed between a direction orthogonal to a hitting surface of the ball hitting portion at the impact and the target hitting direction.

14. A motion analysis apparatus comprising:

a first angle calculation unit that calculates a first angle formed between a tangential direction of a swing trajectory of a ball hitting portion of an exercise equipment at impact and a target hitting direction, using an output from an inertial sensor which measures a swing of the exercise equipment;

a second angle calculation unit that calculates a second angle formed between a direction orthogonal to a hitting surface of the ball hitting portion at the impact and the target hitting direction using an output from the inertial sensor; and

a level calculation unit that calculates a level of the swing on the basis of a relationship between the first angle and the second angle.

15. The motion analysis apparatus according to claim 14,

wherein, in a case where an index related to the first angle is a first index, and an index related to the second angle is a second index, the level calculation unit calculates the level on the basis of the first index and the second index.

16. The motion analysis apparatus according to claim 15,

wherein the level calculation unit specifies a score using the first angle and the second angle calculated through measurement on the basis of a table in which a score is added to region in advance according to a relationship between the first index and the second index, and calculates the score as the level.

17. The motion analysis apparatus according to claim 16,

wherein, in a case where the target hitting direction is set to a +X direction of an X axis, a direction opposite to the gravitational direction is set to a +Z direction of a Z axis, and a direction orthogonal to the X axis and the Z axis is set to be along a Y axis;

in a case where, when the Y axis is a rotation axis, a direction in which +Z of the Z axis rotates in the +X direction of the X axis is defined as a first sign, and a sign reverse to the first sign is defined as a second sign, the first and second signs being related to the first angle; and

in a case where, when the Z axis is a rotation axis, a direction in which +Y of the Y axis rotates in the +X direction of the X axis is defined as a third sign, and a sign reverse to the third sign is defined as a fourth sign, the third and fourth signs being related to the second angle, in the table, a score is set for region in a coordinate system having the first index and the second index as two axes orthogonal to each other, and

wherein the motion analysis apparatus further includes an output unit that outputs a score added to the region specified by the first angle and the second angle which are calculated through the measurement.

18. The motion analysis method according to claim 17, wherein the first sign is a negative sign, the second sign is a positive sign, the third sign is a negative sign, and the fourth sign is a positive sign.

19. A motion analysis system comprising:

the motion analysis apparatus according to claim 14; and

an inertial sensor.