Swing analyzer
First Claim
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1. A golf club shaft selecting system comprising:
- a swing analyzer capable of outputting information that can be used for analyzing a swing of a user, comprising;
first and second acceleration sensors provided on a swing member swung by a user and having a longitudinal direction, spaced apart by a distance in said longitudinal direction for measuring a virtual speed of the swing member;
a calculating unit comparing the measured virtual speed of the swing member with a table of predetermined actual speeds to obtain an actual speed of a portion of the swing member positioned apart from said first and second acceleration sensors in said longitudinal direction;
a strain gauge attached to said swing member; and
a display unit for displaying the actual speed;
wherein, assuming that said swing member is in circular motion during a swing, said calculating unit calculates a virtual speed at said portion based on the distance between said first and second acceleration sensors and calculates the actual speed of said portion utilizing said virtual speed;
wherein said calculating unit calculates the actual speed of said portion by correcting said virtual speed at the time of measurement with predetermined speed correction data stored in said calculating unit;
wherein the predetermined speed correction data is based on an actual measured value from a secondary measuring device;
wherein said calculating unit calculates an amount of deflection of said swing member based on an output from said strain gauge;
wherein said calculating unit stores in advance correction data for approximating said actual speed from said virtual speed based on predetermined data from the secondary measuring device; and
wherein said selecting system selects a golf club shaft based on the actual speed of said portion and the amount of deflection of said swing member.
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Abstract
A calculating unit of a swing analyzer calculates, assuming that a golf club is in a uniform circular motion about a virtual center of rotation O during a swing, a virtual speed Vh at a central point R of a golf club head, based on a distance between first and second acceleration sensors, a distance between the first acceleration sensor and the central point R of a golf club head and outputs from the first and second acceleration sensors, and calculates the speed of central point R of a golf club head utilizing the virtual speed Vh.
81 Citations
16 Claims
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1. A golf club shaft selecting system comprising:
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a swing analyzer capable of outputting information that can be used for analyzing a swing of a user, comprising; first and second acceleration sensors provided on a swing member swung by a user and having a longitudinal direction, spaced apart by a distance in said longitudinal direction for measuring a virtual speed of the swing member; a calculating unit comparing the measured virtual speed of the swing member with a table of predetermined actual speeds to obtain an actual speed of a portion of the swing member positioned apart from said first and second acceleration sensors in said longitudinal direction; a strain gauge attached to said swing member; and a display unit for displaying the actual speed; wherein, assuming that said swing member is in circular motion during a swing, said calculating unit calculates a virtual speed at said portion based on the distance between said first and second acceleration sensors and calculates the actual speed of said portion utilizing said virtual speed; wherein said calculating unit calculates the actual speed of said portion by correcting said virtual speed at the time of measurement with predetermined speed correction data stored in said calculating unit; wherein the predetermined speed correction data is based on an actual measured value from a secondary measuring device; wherein said calculating unit calculates an amount of deflection of said swing member based on an output from said strain gauge; wherein said calculating unit stores in advance correction data for approximating said actual speed from said virtual speed based on predetermined data from the secondary measuring device; and wherein said selecting system selects a golf club shaft based on the actual speed of said portion and the amount of deflection of said swing member. - View Dependent Claims (2, 3, 4, 14, 15, 16)
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5. A method for selecting a golf club shaft comprising:
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measuring the virtual speed of a swing member using one or more accelerometers mounted thereon; measuring an amount of deflection of the swing member using one or more strain gauges mounted thereon; detecting an impact between the swing member and an object using one or more of the first and second acceleration sensors; calculating the actual speed of the swing member immediately preceding impact by comparing a measured virtual speed of the swing member with a table of predetermined actual speeds with a processor to obtain an actual speed of the swing member; and selecting a golf club shaft based on the actual speed of the swing member immediately preceding the impact and the deflection of the swing member. - View Dependent Claims (6, 7, 8, 9, 10, 11, 12, 13)
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Specification