Method for measuring parameters and a striking device
First Claim
1. A method for measuring and computing parameters upon striking an object to be moved, such as a ball, at a hitting location on a striking surface of a striking device, such as a tennis racquet, in which at least one sensor system comprising at least one sensor, which system is attached to the striking device, delivers signals to a computer, which computes at least the velocity of the object being moved and/or the velocity of the striking device from said signals, which velocity is presented on one or more presentation devices, wherein the acceleration of the striking device during a swinging movement and the impact with the object to be moved is measured in at least one direction, and wherein at least the velocity of the object being moved and/or of the striking device is derived from said measurement, for example by means of a computer or the like.
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Accused Products
Abstract
The invention relates to a method for measuring and computing of a striking device, such as a tennis racquet. The velocity of the striking device is determined by measuring the acceleration in at least one direction, preferably a centripetal direction, and computing said velocity from said acceleration.
38 Citations
15 Claims
- 1. A method for measuring and computing parameters upon striking an object to be moved, such as a ball, at a hitting location on a striking surface of a striking device, such as a tennis racquet, in which at least one sensor system comprising at least one sensor, which system is attached to the striking device, delivers signals to a computer, which computes at least the velocity of the object being moved and/or the velocity of the striking device from said signals, which velocity is presented on one or more presentation devices, wherein the acceleration of the striking device during a swinging movement and the impact with the object to be moved is measured in at least one direction, and wherein at least the velocity of the object being moved and/or of the striking device is derived from said measurement, for example by means of a computer or the like.
- 2. A method for measuring and computing parameters upon striking an object to be moved, such as a ball, a shuttle or a puck, at a hitting location on a striking surface of a striking device, such as a tennis racquet, a badminton racquet, a squash racquet, a table tennis bat, a cricket bat, a hockey stick or the like, in which at least one sensor system comprising at least one sensor, which system is attached to the striking device, delivers signals to a computer, at least upon making contact with the object to be moved, which computer computes at least the velocity of the object being moved and/or the position of the hitting location on the striking surface from said signals, which velocity and/or position is presented on one or more presentation devices, such as a panel, a sheet or a screen, wherein the acceleration of the striking device during the swinging movement and/or upon impact with the object to be moved is measured in at least one direction, preferably two or three directions perpendicular to each other, from which measurement the velocity of the object being moved and/or the acceleration of the striking device is derived, for example by means of a computer or the like computing device, and displayed on a presentation device, which process is preferably repeated upon measurement of successive strokes, with the result being displayed in the form of a graphic illustration and/or a statistical diagram, preferably also taking into account the measured interval of time between the strokes and the changes in the velocity during said successive strokes.
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6. A striking device, such as a racquet, a bat or a stick, comprising at least one sensor system attached to the striking device for delivering measuring signals upon movement of the striking device and/or upon impact of an object to be moved with a striking surface present on at least one side of the striking surface, wherein the sensor or sensors of said sensor system is (are) arranged for measuring the magnitude of accelerations in three directions perpendicular to each other, which sensor system is connected to a computer (likewise attached to the striking device) for the purpose of delivering signals thereto, which computer functions to determine the velocity of the striking device at the time of said impact and the velocity of the object to be moved after said impact, which values can be displayed on one or more presentation elements, such as a display screen, a paper strip or the like.
Specification