Patent ID: 9378411
Filing Date: 2016-06-28
CPC Classification: A63B,G06K

Claim Text:
1. A method for extracting impact time in a golf swing, comprising the steps of: acquiring at least one chronological waveform among chronological waveforms of an angular velocity ωx about x-axis, an angular velocity ωy about y-axis, and an angular velocity ωz about z-axis obtained when a golf ball is hit by a golf club attached with a sensor capable of measuring angular velocities about three axes, when the x-axis is orientated in a direction along a toe-heel direction of a golf club head, when the y-axis is orientated so as to follow along a direction in which a ball is hit, and when the z-axis is orientated to match an axial direction of a shaft; acquiring timing at which laser light, disposed immediately in front of where the golf club head impacts the ball, is shielded by the golf club head or the shaft; and determining an impact time using the at least one chronological waveform and the timing, wherein the step of determining comprises the sub-steps of: