POINT OF CONTACT DETECTION

摘要

The present invention is directed to a process for determining at least one first coordinate of the point of contact of a ball on the strings of a ball game racquet, as well as a ball game racquet suitable for carrying out such a process.

主权项

1. Process for determining at least one first coordinate of the point of contact of a ball on the strings of a ball game racquet with a racquet head and a handle section, wherein the longitudinal axis of the ball game racquet defines an x-coordinate, the transverse axis of the ball game racquet defines a y-coordinate and the line perpendicular to the strings defines a z-coordinate, comprising the following steps:
a) measuring at least one kinematic basic parameter in a first direction as a function of time at a first point of the ball game racquet, preferably with a measurement rate of at least 200 Hz; b) transforming the measured kinematic basic parameter into the frequency domain; and c) calculating the first coordinate of the point of contact on the basis of the transformed kinematic basic parameter in the frequency domain.