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1. (WO2018017286) SWING ANALYSIS METHOD USING A SWING PLANE REFERENCE FRAME

Pub. No.:    WO/2018/017286    International Application No.:    PCT/US2017/039209
Publication Date: Fri Jan 26 00:59:59 CET 2018 International Filing Date: Tue Jun 27 01:59:59 CEST 2017
IPC: A63B 69/00
Applicants: BLAST MOTION INC.
Inventors: THORNBRUE, James
CHERVENY, Patrick
Title: SWING ANALYSIS METHOD USING A SWING PLANE REFERENCE FRAME
Abstract:
A method for analyzing sensor data from baseball swings (or swings in similar sports) that transforms data into a reference frame defined by the bat orientation and velocity at impact. The swing plane defined by these two axes provides a natural and robust reference frame for physically relevant measurements of swing characteristics. Illustrative swing metrics derived from swing plane reference frame data include: swing speed, defined as a rotational rate within the swing plane; total swing angle, defined as the angular change within the swing plane; and swing tempo, defined as the percentage of peak swing speed achieved halfway through the swing. Analyzing these metrics from multiple swings across multiple users identifies factors that contribute to peak performance. Metrics may be combined into multidimensional feature vectors that characterize a swing; these feature vectors may be used to group swings into swing styles or to match swings against similar players.