| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for extracting an impact time in a golf swing, that can improve accuracy in determining the impact time.SOLUTION: An impact time in a swing is extracted on the basis of a measurement value from a sensor, that is obtained by hitting a ball. A method for extracting an impact time in a golf swing includes: a determination step of determining whether an angular velocity ωz around a shaft axis being a z-axis is over a range in a predetermined time width of measured data; a setting step of setting a first temporary impact time when range-over is determined in the determination step, and setting a second temporary impact time when range-over is not determined; and a candidate acquisition step of acquiring three candidates of an impact time, on the basis of respective time-series waveforms of an angular velocity ωx around an x-axis, an angular velocity ωy around a y-axis, and an angular velocity ωz around a z-axis with the set first or second temporary impact time as reference. An impact time is determined among the three impact time candidates in response to predetermined determination reference. |
