Motion analysis device, motion analysis system, motion analysis method, program, and recording medium

• US 10,600,056 B2
• Filed: 05/08/2018
• Issued: 03/24/2020
• Est. Priority Date: 12/22/2014
• Status: Active Grant

• Current Assignee: Seiko Epson Corporation (Seiko Group)
• Original Assignee: Seiko Epson Corporation (Seiko Group)
• Inventors: Shibuya, Kazuhiro, Sato, Masafumi
• Primary Examiner(s): Legesse, Nini F
• Application Number:
  US15/973,589
• Publication Number:
  US 20180300728A1
• Time in Patent Office: 686 Days
• Field of Search: 473221-223, 473226, 473227
• CPC Class Codes: A61B 2503/10 Athletes
• CPC Class Codes: A61B 5/11 Measuring movement of the entire body or parts thereof, e.g. head or hand tremor, mobility of a limb for measuring pulse A61B5/02 ;A61B5/1038 takes precedence; motion detection to correct for motion artifacts in physiological signals A61B5/721
• CPC Class Codes: A61B 5/6895 Sport equipment
• CPC Class Codes: G06F 2218/14 by matching peak patterns
• CPC Class Codes: G06Q 10/0639 Performance analysis of employees; Performance analysis of enterprise or organisation operations
• CPC Class Codes: G06Q 20/24 Credit schemes, i.e. "pay after"
• CPC Class Codes: G06Q 20/342 Cards defining paid or billed services or quantities
• CPC Class Codes: G06Q 20/4016 involving fraud or risk level assessment in transaction processing
• CPC Class Codes: G06V 40/23 Recognition of whole body movements, e.g. for sport training
• CPC Class Codes: G09B 19/0038 Sports
• CPC Class Codes: G16H 20/30 relating to physical therapies or activities, e.g. physiotherapy, acupressure or exercising
• CPC Class Codes: H04M 1/72412 using two-way short-range wireless interfaces

Abstract

A motion analysis device includes a first calculation unit that obtains a relation between a movement direction of a ball hitting surface of an exercise tool at a time of entering an impact and a posture of the ball hitting surface at the impact by using an output of an inertial sensor.

Claims

1. A motion analysis system comprising:

a wireless inertial sensor that is configured to attach to a shaft of a golf club, and that measures acceleration; and

a processor that is configured to wirelessly communicate with the wireless inertial sensor, and that is programmed to;

calculate, based on measured acceleration data received from the wireless inertial sensor, an initial position and an initial posture of a ball hitting surface of the golf club at a timing of starting a swing;

detect, based on the received measured acceleration data, a timing of actual impact between the ball hitting surface of the golf club and a golf ball;

calculate a movement direction of the ball hitting surface of the golf club and an impact posture of the ball hitting surface at the timing of actual impact;

calculate a relative angle of the ball hitting surface of the golf club at the timing of actual impact based on the calculated movement direction and the calculated impact posture of the ball hitting surface at the timing of actual impact; and

cause a display to display

projection-related data based on the calculated relative angle of the ball hitting surface at the timing of actual impact.

2. The motion analysis system according to claim 1, wherein the processor is further programmed to:

obtain a face vector indicating the initial posture of the ball hitting surface at the timing of starting the swing based on the measured acceleration data received from the wireless inertial sensor.

3. The motion analysis system according to claim 1, wherein the processor is further programmed to:

calculate a movement direction vector of the ball hitting surface at the timing of starting the swing based on the calculated impact posture of the ball hitting surface at the timing of actual impact.

4. The motion analysis system according to claim 3, wherein the movement direction vector of the ball hitting surface at the timing of starting the swing is projected on a predetermined plane intersecting the ball hitting surface in a vertical direction.

5. The motion analysis system according to claim 1, wherein the displayed projection-related data includes:

a swing path and relative rotation angle.

6. The motion analysis system according to claim 1, wherein the processor is further programmed to:

calculate a movement direction of the ball hitting surface at the timing of actual impact.

7. The motion analysis system according to claim 1, wherein the processor is further programmed to:

calculate, as the relative face angle of the ball hitting surface at the timing of actual impact, an angle formed by a movement direction vector and a face vector on an XY plane.

8. The motion analysis system according to claim 1, wherein the processor is further programmed to control the display to display, as the projection-related data, a type of predicted projectile line.

9. The motion analysis system according to claim 8, wherein the processor is further programmed to control the display to display a map including an area that is divided in accordance with the type of projectile line, and a two-dimensional graph.

10. The motion analysis system according to claim 9, wherein the processor is further programmed to control the display to display the predicted projectile line in the middle of the two-dimensional graph.

11. The motion analysis system according to claim 1, wherein the processor is further programmed to control the display to display a plurality of pieces of data regarding a plurality of swings at a plurality of times with a two-dimensional graph and to distinguish recent data from other data that is not recent on the two-dimensional graph.

12. The motion analysis method according to claim 1, wherein the processor is further programmed to:

cause the display to display, as the projection-related data, the movement direction vector of the ball hitting surface at the timing of starting the swing on a predetermined plane intersecting the ball hitting surface in a vertical direction.

13. A motion analysis method comprising:

calculating, based on measured acceleration data received from a wireless inertial sensor, an initial position and an initial posture of a ball hitting surface of the golf club at a timing of starting a swing, the wireless inertial sensor being configured to attach to a shaft of a golf club, and to measure acceleration;

detecting, based on the received measured acceleration data, a timing of actual impact between the ball hitting surface of the golf club and a golf ball;

calculating a movement direction of the ball hitting surface of the golf club and an impact posture of the ball hitting surface at the timing of actual impact;

calculating a relative angle of the ball hitting surface of the golf club at the timing of actual impact based on the calculated movement direction and the calculated impact posture of the ball hitting surface at the timing of actual impact; and

causing a display to display projection-related data based on the calculated relative angle of the ball hitting surface at the timing of actual impact.

14. A non-transitory computer readable medium that stores motion analysis program instructions that, when executed by a computer, causes the computer to:

calculate, based on measured acceleration data received from a wireless inertial sensor, an initial position and an initial posture of a ball hitting surface of the golf club at a timing of starting a swing, the wireless inertial sensor being configured to attach to a shaft of a golf club, and to measure acceleration;

detect, based on the received measured acceleration data, a timing of actual impact between the ball hitting surface of the golf club and a golf ball;

calculate a movement direction of the ball hitting surface of the golf club and an impact posture of the ball hitting surface at the timing of actual impact;

calculate a relative angle of the ball hitting surface of the golf club at the timing of actual impact based on the calculated movement direction and the calculated impact posture of the ball hitting surface at the timing of actual impact; and

cause a display to display projection-related data based on the calculated relative angle of the ball hitting surface at the timing of actual impact.