Method and computer-readable storage medium for fitting tennis racket and analysis device
First Claim
1. A tennis racket fitting method for selecting a suitable tennis racket for a particular user, the method comprising:
- a first step of preparing a plurality of test tennis rackets, at least one type of racket property that influences swing for hitting a ball being defined for each of the plurality of test tennis rackets, and setting index values by quantifying the at least one type of racket property for each of the plurality of test tennis rackets;
a second step of making the particular user swing a reference tennis racket at least one time in order to hit a tennis ball, and obtaining a measured value by measuring transition in selected one or more of the position, the velocity, the acceleration, and the angular velocity of the reference tennis racket in at least a portion of an interval from when the swing starts until when the swing ends, the reference tennis racket being not included in the plurality of test tennis rackets;
a third step of calculating at least one evaluation indicator to be an evaluation of the swing of the reference tennis racket based on the measured value, the at least one evaluation indicator being different from the at least one type of racket property but being subjected to a magnitude of the at least one type of racket property; and
a fourth step of referring to the calculated at least one evaluation indicator of the reference tennis racket in the third step and the index values of the plurality of test tennis rackets set in the first step, and selecting one of the plurality of test tennis rackets for said particular user based on a predetermined correlation between the at least one type of racket property and the at least one evaluation indicator, without having the particular user swing any of the plurality of test tennis rackets before the selection,wherein the selection in the fourth step is resulted from an evaluation that the at least one evaluation indicator of the selected one of the plurality of test tennis rackets would be improved compared to the at least one evaluation indicator of the reference tennis racket calculated in the third step, and the selected one of the plurality of test tennis rackets is for the particular user to be test swung after being selected.
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Accused Products
Abstract
A tennis racket fitting method according to the present invention comprises: a first step of preparing a plurality of test tennis rackets, at least one type of racket property that influences swing for hitting a ball being defined for each of the test tennis rackets; a second step of causing a reference tennis racket to be swung at least one time by a user in order to hit a tennis ball, and acquiring a measured value by measuring transition in at least one of the position, the velocity, the acceleration, and the angular velocity of the reference tennis racket in at least a portion of an interval from when the swing starts until when the swing ends; a third step of calculating at least one evaluation indicator to be an evaluation of the swing of the reference tennis racket based on the measured value; and a fourth step of, based on the racket property, selecting a tennis racket that can improve at least one evaluation indicator from among the test tennis rackets.
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Citations
17 Claims
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1. A tennis racket fitting method for selecting a suitable tennis racket for a particular user, the method comprising:
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a first step of preparing a plurality of test tennis rackets, at least one type of racket property that influences swing for hitting a ball being defined for each of the plurality of test tennis rackets, and setting index values by quantifying the at least one type of racket property for each of the plurality of test tennis rackets; a second step of making the particular user swing a reference tennis racket at least one time in order to hit a tennis ball, and obtaining a measured value by measuring transition in selected one or more of the position, the velocity, the acceleration, and the angular velocity of the reference tennis racket in at least a portion of an interval from when the swing starts until when the swing ends, the reference tennis racket being not included in the plurality of test tennis rackets; a third step of calculating at least one evaluation indicator to be an evaluation of the swing of the reference tennis racket based on the measured value, the at least one evaluation indicator being different from the at least one type of racket property but being subjected to a magnitude of the at least one type of racket property; and a fourth step of referring to the calculated at least one evaluation indicator of the reference tennis racket in the third step and the index values of the plurality of test tennis rackets set in the first step, and selecting one of the plurality of test tennis rackets for said particular user based on a predetermined correlation between the at least one type of racket property and the at least one evaluation indicator, without having the particular user swing any of the plurality of test tennis rackets before the selection, wherein the selection in the fourth step is resulted from an evaluation that the at least one evaluation indicator of the selected one of the plurality of test tennis rackets would be improved compared to the at least one evaluation indicator of the reference tennis racket calculated in the third step, and the selected one of the plurality of test tennis rackets is for the particular user to be test swung after being selected. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A non-transitory computer-readable recording medium storing a tennis racket fitting program for causing a computer to perform:
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a first step of storing information regarding a plurality of test tennis rackets, at least one type of racket property that influences swing for hitting a ball being defined for each of the plurality of test tennis rackets, index values being set by quantifying the at least one type of racket property for each of the plurality of test tennis rackets; a second step of when a reference tennis racket is swung at least one time by a particular user in order to hit a tennis ball, receiving, as a measured value, transition in selected one or more of the position, the velocity, the acceleration, and the angular velocity of the reference tennis racket measured in at least a portion of an interval from when the swing starts until when the swing ends, the reference tennis racket being not included in the plurality of test tennis rackets; a third step of calculating at least one evaluation indicator to be an evaluation of the swing of the reference tennis racket based on the measured value, the at least one evaluation indicator being different from the at least one type of racket property but being subjected to a magnitude of the at least one type of racket property; and a fourth step of referring to the calculated at least one evaluation indicator of the reference tennis racket in the third step and the index values of the plurality of test tennis rackets set in the first step, and selecting one of the plurality of test tennis rackets for said particular user based on a predetermined correlation between the at least one type of racket property and the at least one evaluation indicator, without having the particular user swing any of the plurality of test tennis rackets before the selection, wherein the selection in the fourth step is resulted from an evaluation that the at least one evaluation indicator of the selected one of the plurality of test tennis rackets would be improved compared to the at least one evaluation indicator of the reference tennis racket calculated in the third step, and the selected one of the plurality of test tennis rackets is for the particular user to be test swung after being selected. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16)
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17. An analyzing apparatus for tennis racket fitting comprising:
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a first storage unit storing information regarding a plurality of test tennis rackets, at least one type of racket property that influences swing for hitting a ball being defined for each of the plurality of test tennis rackets, index values being set by quantifying the at least one type of racket property for each of the plurality of test tennis rackets; a second storage unit storing, when a reference tennis racket is swung at least one time by a particular user in order to hit a tennis ball, as a measured value, transition in selected one or more of the position, the velocity, the acceleration, and the angular velocity of the reference tennis racket measured in at least a portion of an interval from when the swing starts until when the swing ends, the reference tennis racket being not included in the plurality of test tennis rackets; a calculation unit that calculates at least one evaluation indicator to be an evaluation of the swing of the reference tennis racket based on the measured value, the at least one evaluation indicator being different from the at least one type of racket property but being subjected to a magnitude of the at least one type of racket property; and a racket selection unit that refers to the calculated at least one evaluation indicator of the reference tennis racket and the index values of the plurality of test tennis rackets, and selects one of the plurality of test tennis rackets for said particular user based on a predetermined correlation between the at least one type of racket property and the at least one evaluation indicator, without having the particular user swing any of the plurality of test tennis rackets before the selection, wherein the racket selection unit is configured to make the section based on an evaluation that the at least one evaluation indicator of the selected one of the plurality of test tennis rackets would be improved compared to the at least one evaluation indicator of the reference tennis racket.
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Specification