Motion analysis method, motion analysis display method, and motion analysis device

• US 9,536,319 B2
• Filed: 11/06/2014
• Issued: 01/03/2017
• Est. Priority Date: 11/22/2013
• Status: Active Grant

• Current Assignee: Seiko Epson Corporation (Seiko Group)
• Original Assignee: Seiko Epson Corporation (Seiko Group)
• Inventors: Kodaira, Kenya, Shibuya, Kazuhiro, Nomura, Kazuo, Sato, Masafumi
• Primary Examiner(s): Fitzpatrick, Atiba O
• Assistant Examiner(s): Wang, Carol
• Application Number:
  US14/534,594
• Publication Number:
  US 20150146933A1
• Time in Patent Office: 789 Days
• Field of Search: None
• US Class Current: 1/1
• CPC Class Codes: A61B 2562/0219 Inertial sensors, e.g. accelerometers, gyroscopes, tilt switches
• CPC Class Codes: A61B 5/1122 of movement trajectories
• CPC Class Codes: A61B 5/6895 Sport equipment
• CPC Class Codes: A61B 5/744 Displaying an avatar, e.g. an animated cartoon character
• CPC Class Codes: A63B 2071/0647 Visualisation of executed movements
• CPC Class Codes: A63B 2220/40 Acceleration
• CPC Class Codes: A63B 2220/51 Force
• CPC Class Codes: A63B 2220/833 Sensors arranged on the exercise apparatus or sports implement
• CPC Class Codes: A63B 24/0006 Computerised comparison for qualitative assessment of motion sequences or the course of a movement
• CPC Class Codes: A63B 69/3608 Attachments on the body, e.g. for measuring, aligning, restraining A63B69/0059, A63B69/3673 take precedence
• CPC Class Codes: G06T 2207/30221 Sports video; Sports image
• CPC Class Codes: G06T 7/20 Analysis of motion motion estimation for coding, decoding, compressing or decompressing digital video signals H04N19/43, H04N19/51
• CPC Class Codes: G09B 19/0038 Sports

Abstract

A motion analysis device has a determination unit which uses an output from an inertial sensor mounted on at least one of a subject and a tool operated by the subject, to determine a dominant hand of the subject in a swing. The determination unit can determine the dominant hand on the basis of the sign of angular velocity or acceleration from the inertial sensor. A calculation unit which calculates motion analysis information in a swing, using an output from the inertial sensor can add dominant hand information from the determination unit to the motion analysis information. The motion analysis device can include a coincidence determination unit which determines that a first subject and a second subject have different dominant hands, and an inverted image generation unit which inverts first motion analysis information in the case of no coincidence.

Claims

1. A motion analysis method comprising

determining a dominant hand of a subject in a swing using an output from an inertial sensor mounted on at least one of the subject and a tool operated by the subject;

calculating motion analysis information in the swing, using the output from the inertial sensor; and

adding information of the dominant hand of the subject to the motion analysis information, wherein;

the motion analysis information includes first motion analysis information of a first subject, and second motion analysis information of a second subject,

the information of the dominant hand of the subject includes first dominant hand information added to the first motion analysis information, and second dominant hand information added to the second motion analysis information,

the method includes determining whether the dominant hands of the first subject and the second subject coincide with each other or not, on the basis of the first dominant hand information and the second dominant hand information,

the inertial sensor includes an angular velocity sensor, and

when a direction crossing a striking surface of the tool is an X axis, a longitudinal direction of the tool is a Y axis and a direction perpendicular to the X axis and the Y axis is a Z axis and when determining whether the dominant hand of the first subject matches the dominant hand of the second subject, a detection is made about whether the subject is right-handed or left-handed using an angular velocity about the Z axis detected by the angular velocity sensor when the tool is swung.

2. The motion analysis method according to claim 1, wherein angular velocity obtained from the output from the inertial sensor is used to determine the dominant hand of the subject on the basis of whether the angular velocity is positive or negative.

3. The motion analysis method according to claim 1, wherein acceleration obtained from the output from the inertial sensor is used to determine the dominant hand of the subject on the basis of whether the acceleration is positive or negative.

4. The motion analysis method according to claim 1, wherein the detection is made about whether the subject is right-handed or left-handed using time series data of the angular velocity about the Z axis detected by the angular velocity sensor when the tool is swung.

5. A motion analysis display method for displaying a motion analysis on a first subject and a second subject as subjects, the method comprising:

calculating first motion analysis information of the first subject and second motion analysis information of the second subject in a swing, using an output from an inertial sensor mounted on at least one of the first subject and the second subject and a tool operated by the first subject and the second subject;

determining a dominant hand of the first subject and the second subject, using the first motion analysis information and the second motion analysis information;

inverting a positive and negative of an output of the first motion analysis information if, as a result of the determination, it is determined that the first subject and the second subject have different dominant hands; and

displaying, on a screen, an image based on the first motion analysis information that is inverted, wherein;

the inertial sensor includes an angular velocity sensor, and

when a direction crossing a striking surface of the tool is an X axis, a longitudinal direction of the tool is a Y axis and a direction perpendicular to the X axis and the Y axis is a Z axis and when determining the dominant hand of the first subject and the second subject, a detection is made about whether the first subject and the second subject is right-handed or left-handed using an angular velocity about the Z axis detected by the angular velocity sensor when the tool is swung.

6. The motion analysis display method according to claim 5, wherein an image based on the first motion analysis information and an image based on the second motion analysis information are displayed on a same screen.

7. A motion analysis display method for displaying a motion analysis on a first subject and a second subject as subjects, the method comprising:

using an output from an inertial sensor mounted on at least one of the first subject and the second subject and a tool operated by the first subject and the second subject, to calculate first motion analysis information of the first subject and second motion analysis information of the second subject in a swing;

generating first image data based on the first motion analysis information and second image data based on the second motion analysis information, using the first motion analysis information and the second motion analysis information;

determining a dominant hand of the first subject and the second subject, using the first motion analysis information and the second motion analysis information; and

inverting the first image data if, as a result of the determination, it is determined that the first subject and the second subject have different dominant hands, wherein;

the inertial sensor includes an angular velocity sensor, and

when a direction crossing a striking surface of the tool is an X axis, a longitudinal direction of the tool is a Y axis and a direction perpendicular to the X axis and the Y axis is a Z axis and when determining the dominant hand of the first subject and the second subject, a detection is made about whether the first subject and the second subject is right-handed or left-handed using an angular velocity about the Z axis detected by the angular velocity sensor when the tool is swung.

8. The motion analysis display method according to claim 7, wherein an image based on the first motion analysis information and an image based on the second motion analysis information are displayed on a same screen.