JP-2026074502-A - Swing analysis device and swing analysis method

Abstract

[Problem] To classify swings using time-series data of torque exerted during the swing motion. [Solution] A swing analysis device 1 for multiple players, comprising: an acquisition unit 14a that acquires time-series data of torque exerted during the swing of a hitting tool for multiple players; an expansion unit 14b that expands the time-series data of torque into modes; a determination unit 14c that determines the adopted mode from the results obtained by the expansion unit 14b; and a stratification unit 14d that stratifies the swing using the determined adopted mode and the results obtained by the expansion unit 14b. [Selection Diagram] Figure 5

Inventors

• 岡崎 弘祐
• 中村 佑斗
• 植田 尚良
• 辻内 伸好
• 伊藤 彰人

Assignees

• 住友ゴム工業株式会社
• 学校法人同志社

Dates

Publication Date

20260507

Application Date

20241021

Claims (8)

1. A swing analysis device for classifying the swings of multiple players, The acquisition unit acquires time-series data of the torque exerted during the swing of the hitting tool for the aforementioned multiple players, A development unit that performs mode expansion on the time-series data of the torque, A determination unit that determines the mode to be adopted from the results obtained from the aforementioned development unit, A stratification unit that stratifies the swings of the plurality of players using the determined adoption mode and the results obtained by the development unit, A swing analysis device, including a swing analysis device.
2. The swing analysis apparatus according to claim 1, wherein the mode expansion is singular value decomposition.
3. The swing analysis apparatus according to claim 2, wherein the determination unit determines one or more modes as the adopted modes, wherein the cumulative contribution rate of the modes calculated using the singular values obtained in the singular value decomposition exceeds a predetermined threshold.
4. The swing analysis apparatus according to claim 3, wherein the result obtained by the expansion unit is a right singular vector.
5. The stratification unit performs the stratification by cluster analysis, as described in any one of claims 1 to 4.
6. The swing analysis device according to any one of claims 1 to 4, wherein the torque is the torque around the center of gravity of the player's arm, or the torque around the center of gravity of the striking tool.
7. A swing analysis method for classifying the swings of multiple players, The steps include acquiring time-series data of the torque exerted during the swing of the club for multiple players, and The steps include: performing mode expansion on the time-series data of the torque; The step of determining the adopted mode from the results obtained by the aforementioned mode deployment, A step of stratifying the swing using the determined adoption mode and the results obtained from the mode deployment, A swing analysis method that includes this.
8. A swing analysis program for classifying the swings of multiple players, The steps include acquiring time-series data of the torque exerted during the swing of the club for multiple players, and The steps include: a step of performing mode expansion on the time-series data of the torque, The step of determining the adopted mode from the results obtained by the aforementioned mode deployment, A step of stratifying the players using the determined adoption mode and the results obtained from the mode deployment, A swing analysis program that is run on a computer.

Description

This invention relates to a swing analysis device and a swing analysis method. Non-patent document 1 below describes a method for measuring a golf club swing and calculating time-series data of the torque exerted during the swing using an inverse dynamics model. Hiroyuki Okazaki, et al., "Development of a Swing Estimation Method Using Vibration Analysis Results of Torque During Swing and a Mechanical Model," Proceedings of the Dynamics and Design Conference 2020, The Japan Society of Mechanical Engineers, September 2020, No. 20-11. This is an overall configuration diagram of the swing analysis system of this embodiment.This flowchart shows the procedure for the swing analysis method of this embodiment.This is a perspective on golf clubs as striking tools.This is a block diagram showing an example of a swing analysis device.This is a schematic diagram illustrating a three-dimensional rigid body two-link model.(a), (b), and (c) are graphs showing the relationship between the x, y, and z axis components of torque around the center of gravity of the arm and time, respectively.(a), (b), and (c) are graphs showing the relationship between the x, y, and z-axis components of torque around the club's center of gravity and time, respectively.(a), (b), and (c) are graphs showing the contribution rates of the 1st to 10th modes when the torque time series data in Figures 6(a), (b), and (c) are decomposed by singular value decomposition, respectively.(a), (b), and (c) are graphs showing the contribution rates of the 1st to 10th modes when the torque time series data in Figures 7(a), (b), and (c) are decomposed by singular value decomposition, respectively.(a), (b), and (c) are graphs in which the horizontal axis represents the golfer, and the vertical axis represents the magnitude of the right singular vectors of the x, y, and z axes of torque data around the center of gravity of the arms.As an example of cluster analysis results, this is a dendrogram created using the right singular vector of torque data around the center of gravity of the arm.(a), (b), and (c) are graphs in which the x, y, and z axes of torque data around the center of gravity of the arm are plotted on the vertical axis, and time is plotted on the horizontal axis, with different line types used for each stratified group.Figures 12(a), (b), and (c) show further enlarged views of the areas indicated by the dashed lines.(a) is the trajectory of the swing motion on the absolute coordinate system Y-Z plane, and (b) is the trajectory of the swing motion on the absolute coordinate system X-Z plane.This graph shows the average swing plane angle for each stratified group. One embodiment of the present invention will be described below with reference to the drawings. The drawings contain exaggerations and representations that differ from the actual structural dimensional ratios in order to aid in understanding the present invention. Furthermore, where there are multiple embodiments, the same or common elements are denoted by the same reference numerals throughout the specification, and redundant descriptions are omitted. Moreover, the specific configurations shown in the embodiments and drawings are for the purpose of understanding the content of the present invention, and the present invention is not limited to the specific configurations shown in the illustrations. [Swing Analysis System] Figure 1 shows an overall configuration diagram of the swing analysis system 100, including the swing analysis device 1 of this embodiment. The swing analysis system 100 is composed of, for example, the swing analysis device 1 and the measurement device 2. The swing analysis device 1 is a device for classifying multiple swings using various hitting tools 3 into several groups. Classifying swings can also be said to be classifying golfers. Therefore, in this specification, the classification of swings may be read as the classification of golfers 5. In this embodiment of the swing analysis system 100, a golf club 30 is used as the striking tool 3. Therefore, this embodiment of the swing analysis system 100 is suitably implemented for analyzing the swing of a golfer 5 using a golf club 30. Please note that the following description is based on this embodiment. However, other than a golf club, various rackets, bats, etc., may also be used as the striking tool 3. [Swing Analysis Process] Figure 2 is a flowchart showing the procedure for swing analysis (swing classification) using the swing analysis system 100 of this embodiment, and its outline is as follows. (1) Swing measurement (Step S1): Here, the swings of multiple players are measured using measuring device 2. (2) Calculation of time-series data of torque (Step S2): Here, time-series data of the torque exerted during each player's swing is calculated based on their swing measurement data. (3) Acquisition of time-series torque data and mode expansion (step S3): Here, the swing analysis device 1 acquires time-series data of th