MOTION ANALYSIS METHOD AND MOTION ANALYSIS DEVICE

• US 20140379294A1
• Filed: 06/17/2014
• Published: 12/25/2014
• Est. Priority Date: 06/21/2013
• Status: Active Grant

• Current Assignee: Seiko Epson Corporation (Seiko Group)
• Original Assignee: Seiko Epson Corporation (Seiko Group)
• Inventors: SHIBUYA, Kazuhiro, NOMURA, Kazuo, KODAIRA, Kenya, SATO, Masafumi
• Granted Patent: US 10,459,002 B2
• Time in Patent Office: Days
• US Class Current: 702/141
• CPC Class Codes: A61B 2562/0219 Inertial sensors, e.g. accelerometers, gyroscopes, tilt switches
• CPC Class Codes: A61B 5/1121 Determining geometric values, e.g. centre of rotation or angular range of movement
• CPC Class Codes: A61B 5/1122 of movement trajectories
• CPC Class Codes: A61B 5/6895 Sport equipment
• CPC Class Codes: A61B 5/743 Displaying an image simultaneously with additional graphical information, e.g. symbols, charts, function plots
• CPC Class Codes: G01P 13/02 Indicating direction only, e.g. by weather vane
• CPC Class Codes: G01P 7/00 Measuring speed by integrating acceleration measuring travelled distance by double integration of acceleration G01C21/16
• CPC Class Codes: G06V 40/23 Recognition of whole body movements, e.g. for sport training

Abstract

A motion analysis method includes calculating a change in an amount of inertia of a region attached with an inertial sensor during a swing using an output of the inertial sensor, and identifying a maximum value of the amount of inertia during the swing to compare the maximum value and the amount of inertia at an impact with each other. A deceleration timing during the swing of the region (the grip of the sporting equipment) attached with the inertial sensor is identified, and the quality of the swing can be evaluated.

Claims

1. A motion analysis method comprising:

calculating a change in an amount of inertia of a region attached with an inertial sensor during a swing using an output of the inertial sensor; and

identifying a maximum value of the amount of inertia during the swing to compare the maximum value and the amount of inertia at an impact.

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

calculating a ratio between the maximum value of the amount of inertia during the swing and the amount of inertia at the impact.

4. The motion analysis method according to claim 1, wherein

the amount of inertia is a moving speed.

6. The motion analysis method according to claim 1, wherein

the inertial sensor is attached to at least one of sporting equipment used for the swing, and a hand of a subject.

8. The motion analysis method according to claim 1, wherein

a change in the amount of inertia during the swing is displayed in a time-series manner.

9. The motion analysis method according to claim 6, wherein

the amount of inertia of a region attached with the inertial sensor and the amount of inertia of a hitting region of sporting equipment used for the swing are displayed.

3. A motion analysis method comprising:

calculating a change in an amount of inertia of a region attached with an inertial sensor during a swing using an output of the inertial sensor; and

detecting a timing when the amount of inertia turns from increase to decrease during the swing.

5. The motion analysis method according to claim 3, wherein

the amount of inertia is a moving speed.

7. The motion analysis method according to claim 3, wherein

the inertial sensor is attached to at least one of sporting equipment used for the swing, and a hand of a subject.

10. The motion analysis method according to claim 3, wherein

the timing when the amount of inertia turns from increase to decrease is displayed together with a motion trajectory of the swing.

11. A motion analysis device comprising:

a calculation section adapted to calculate the change in an amount of inertia of a region attached with an inertial sensor during a swing using an output of the inertial sensor, identify a maximum value of the amount of inertia during the swing, and compare the maximum value and an amount of inertia at an impact.