Method for calculating a repeatability index when using a tennis racket
First Claim
1. A method for calculating a repeatability index of gestures and shots of a player striking a tennis ball with a racket, the method comprising:
- preliminary steps of, using the racket comprised of a handle, a frame, inside which frame is a head formed from different transverse and longitudinal strings, the head being tensed, and measurement sensors, fixed to the racket, that measure at least vibrations, i) conducting a series of shots with the racket striking a respective tennis ball in each of said shots, ii) with data from the measurement sensors, measuring vibration, angular velocity, and linear acceleration of the racket during each said shot, and iii) generating behavioral data of the racket corresponding to each said shot of the racket;
wherein the shots of the racket include plural different types of hits by the racket on the tennis ball, the types of hits including at least a topspin forehand shot, a service shot, and a slice backhand shot,wherein the generated behavioral data includes data related to the measured vibration of the racket for each type of hit, the measured linear acceleration of the racket for each type of hit, and the measured angular velocity of the racket for each type of hit;
playing steps of i) conducting a further series of shots with the player striking the ball with the racket, wherein the shots of the further series of shots include the plural different types of hits by the racket on the tennis ball, including the topspin forehand shot, the service shot, and the slice backhand shot, ii) using the measured vibration, the measured linear acceleration, and the measured angular velocity from said measurement sensors of the racket for each hit made in the further series of shots, measuring the vibration, the angular velocity and the linear acceleration of the racket for each shot of the further series of shots, and iii) generating second playing data of the racket corresponding to each said shot of the further series of shots; and
analysis steps of i) comparing a) the measured vibration, angular velocity and linear acceleration of the racket for each shot of the further series of shots to b) the behavioral data to determine the type hit, from the plural different types of hits, being used by the player in each shot of the further series of shots, and ii) for at least the shots of a first of said determined type of hit made in the further series of shots, determining a repeatability index of the player'"'"'s shots of said first type of hits, by comparing a) the second playing data for each shot of the first type of hit with b) the second playing data for other shots of the first type of hit from the further series of shots, the repeatability index indicating an ability of the player to repeat each of the first type of hit identically.
1 Assignment
0 Petitions
Accused Products
Abstract
A method for calculating a repeatability index of gestures and shots of a player striking a tennis ball with a racket having attached measurement sensors. The method includes conducting an initial series of shots to measure vibration, angular velocity, and linear acceleration of the racket during each shot to generate behavioral data of the racket corresponding to each shot of the initial series, and later comparing the measured vibration, angular velocity and linear acceleration of the racket to shots of a further series to determine the type of hit and a repeatability index indicating an ability of the player to identically repeat each of the type of hit.
-
Citations
12 Claims
-
1. A method for calculating a repeatability index of gestures and shots of a player striking a tennis ball with a racket, the method comprising:
-
preliminary steps of, using the racket comprised of a handle, a frame, inside which frame is a head formed from different transverse and longitudinal strings, the head being tensed, and measurement sensors, fixed to the racket, that measure at least vibrations, i) conducting a series of shots with the racket striking a respective tennis ball in each of said shots, ii) with data from the measurement sensors, measuring vibration, angular velocity, and linear acceleration of the racket during each said shot, and iii) generating behavioral data of the racket corresponding to each said shot of the racket; wherein the shots of the racket include plural different types of hits by the racket on the tennis ball, the types of hits including at least a topspin forehand shot, a service shot, and a slice backhand shot, wherein the generated behavioral data includes data related to the measured vibration of the racket for each type of hit, the measured linear acceleration of the racket for each type of hit, and the measured angular velocity of the racket for each type of hit; playing steps of i) conducting a further series of shots with the player striking the ball with the racket, wherein the shots of the further series of shots include the plural different types of hits by the racket on the tennis ball, including the topspin forehand shot, the service shot, and the slice backhand shot, ii) using the measured vibration, the measured linear acceleration, and the measured angular velocity from said measurement sensors of the racket for each hit made in the further series of shots, measuring the vibration, the angular velocity and the linear acceleration of the racket for each shot of the further series of shots, and iii) generating second playing data of the racket corresponding to each said shot of the further series of shots; and analysis steps of i) comparing a) the measured vibration, angular velocity and linear acceleration of the racket for each shot of the further series of shots to b) the behavioral data to determine the type hit, from the plural different types of hits, being used by the player in each shot of the further series of shots, and ii) for at least the shots of a first of said determined type of hit made in the further series of shots, determining a repeatability index of the player'"'"'s shots of said first type of hits, by comparing a) the second playing data for each shot of the first type of hit with b) the second playing data for other shots of the first type of hit from the further series of shots, the repeatability index indicating an ability of the player to repeat each of the first type of hit identically. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
-
-
11. A method for calculating a repeatability index of shots of a player striking a tennis ball with a racket, the method comprising:
-
preliminary steps of, with the racket comprised of a handle, a frame, inside which frame is a head formed from different transverse and longitudinal strings, the head being tensed, the head of the racket being divided into plural zones, and a system for measuring playing data comprising measurement sensors fixed to the racket that measure vibrations, linear acceleration, and angular velocity of the racket along three perpendicular directions fixed relative to a terrestrial reference frame, i) conducting a series of shots with the racket striking a respective tennis ball in each of said shots, ii) with the measurement sensors measuring movement of the racket during each said shot, including measuring vibrations, linear acceleration, and angular velocity of the racket during each of said shots, and iii) from the sensors measurements of the vibrations, the linear acceleration, and the angular velocity of the racket during each of said shots generating behavioral data of the racket corresponding to each said shot; wherein the shots of the racket include plural different types of hits by the racket on the tennis ball, the types of hits including at least a topspin forehand shot, a service shot, and a slice backhand shot, wherein the generated behavioral data includes data related to the measured movement of the racket for each type of hit; playing steps of i) conducting a further series of shots with the player striking the ball with the racket, ii) using the data of the measurement sensors, measuring the movement of the racket for each shot of the further series of shots including vibrations, angular velocity, and linear acceleration of the racket, and iii) generating second playing data corresponding to each said shot of the further series of shots; wherein the shots of the further series of shots include the plural different types of hits by the racket on the tennis ball including at least plural shots of a first type of hit from said plural different types of hits, wherein the second playing data relates to the measured movement of the racket for each hit made in the further series of shots; analysis steps of i) for each shot, comparing the second playing data to the behavioral data to determine the type of hit made by the player, and iii) for each of the plural shots of the first type of hit in the further series of shots, determining a repeatability index of the player'"'"'s shots of said first type of hit, by comparing a) the second playing data for each shot of the first type of hit with b) the second playing data for other shots of the first type from the further series of shots, the repeatability index indicating an ability of the player to repeat each of the first type of hit identically. - View Dependent Claims (12)
-
Specification