Golf swing evaluation system

• US 4,991,850 A
• Filed: 12/22/1988
• Issued: 02/12/1991
• Est. Priority Date: 02/01/1988
• Status: Expired due to Fees

• Current Assignee: Helm Instrument Co., Inc.
• Original Assignee: Helm Instrument Co., Inc.
• Inventors: Wilhlem, Donald F.
• Primary Examiner(s): Coven, Edward M.
• Assistant Examiner(s): Harrison, Jessica J.
• Application Number:
  US07/289,231
• Time in Patent Office: 782 Days
• Field of Search: 273/35 R, 273/183 R, 273/183 B, 273/183 D, 273/184 R, 273/186 R, 273/186 A, 273/186 C, 273/193 R, 340/323 R, 73/379, 73/488, 73/489, 73/490, 73/DIG. 4
• US Class Current: 473/233
• CPC Class Codes: A63B 2220/53 Force of an impact, e.g. blow or punch
• CPC Class Codes: A63B 69/362 electrical or electronic
• CPC Class Codes: A63B 69/3632 Clubs or attachments on clubs, e.g. for measuring, aligning A63B69/3614 takes precedence; clubs for swinging exercises in general A63B15/00

Abstract

A golf swing evaluation system includes a golf club containing a sensor and an associated display for indicating the force and location of the impact of the club head against a golf ball. The sensor generates a sensor signal to a force circuit which generates an indication signal having characteristics of the impact. The indication signal is sent to a graphic display and/or a computer for evaluation. The sensor can also be an accelerometer for generating the acceleration characteristics of the club head throughout the swing. Several sensors can be utilized to provide information as to the location of the impact. The display can be located in the club grip or worn by the golfer.

Claims

1. A golf swing evaluation system comprising:

a golf club including a shaft having a club head with a golf ball striking face attached at one end and a grip portion attached to an opposite end;

a plurality of sensing means embedded within said club head and oriented for sensing an impact of said striking face on a golf ball and for generating associated sensor signals representing characteristics of said impact including at least a force of said impact and a location of said impact on said striking face;

a force circuit electrically connected to said sensing means and being responsive to said sensor signals for generating an indication signal representing said characteristics of said impact; and

means responsive to said indication signal for generating a visual indication of said characteristics of said impact, said visual indication including a peak magnitude force indication and a graphic indication of the location of said impact on said striking face.

2. The system according to claim 1 wherein at least one of said sensing means is a piezoelectric force sensor.

3. The system according to claim 1 wherein said sensing means are positioned behind a face plate attached to said club head.

4. The system according to claim 1 wherein said force circuit includes a signal conditioning circuit having a input connected to said sensing means, a scaling circuit having an input connected to an output of said signal conditioning circuit, and a peak capture circuit having a input connected to an output of said scaling circuit for generating said indication signal at an output.

5. The system according to claim 4 wherein said force circuit includes a radio transmitter connected to said peak capture circuit for transmitting said indication signal and said means for generating a visual indication includes a receiver circuit responsive to said transmitted indication signal for generating said visual indication of said characteristics of said impact.

6. The system according to claim 5 wherein said force circuit includes a random access memory connected to said receiver circuit for storing said indication signal.

7. The system according to claim 5 wherein said force circuit includes means for calibrating connected to said sensing means for generating said sensor signal with a range of predetermined magnitudes corresponding to associated ones of said impact forces.

8. The system according to claim 7 including a display device remote from said golf club and having said means for generating a visual indication located therein, and a cable connecting said display device to said grip portion.

9. The golf swing evaluation system according to claim 1 including means for calibrating the magnitude of said sensor signals located in said golf club, a display device remote from said golf club, and means for transmitting said sensor signals to said display device.

10. The golf swing evaluation system according to claim 9 wherein said means for transmitting is one of a detachable cable and a radio transmitter and receiver.

11. The golf swing evaluation system according to claim 1 wherein said means for generating a visual indication includes a mode switch for selecting one of said impact characteristics to be indicated as a visual display.

12. The golf swing evaluation system according to claim 1 wherein said means for generating a visual indication includes a reset button for resetting a visual indication of said characteristics of said impact.

13. A golf swing evaluation system for use with a golf club having a shaft with a club head attached at one end and a grip attached at an opposite end comprising:

a piezoelectric force sensor for sensing the impact of a club head on a golf ball and generating a sensor signal representing characteristics of said impact;

a force circuit having a signal conditioning circuit with an input connected to said force sensor, a scaling circuit with an input connected to an output of said signal conditioning circuit, a peak capture circuit with an input connected to an output of said scaling circuit, a radio transmitter with an input connected to an output of said peak capture circuit, and an output antenna connected to an output of said radio transmitter, said output circuit module being responsive to said sensor signal for generating an indication signal representing characteristics of said impact including a force of said impact and a location of said impact; and

a data storage module having an input antenna, a radio receiver with an input connected to said input antenna, a random access memory having an input connected to an output of said radio receiver for storing said indication signal, and a connector means connected to an output of said random access memory and adapted to be connected to a display device for generating a visual-indication of said indication signal.

14. The system according to claim 13 wherein said data storage module includes a processor circuit connected between said radio receiver output and said random access memory input for converting said indication signal from analog form to digital form.

15. The system according to claim 13 wherein said indication signal includes force magnitude versus time characteristics of the impact.

16. A golf swings evaluation system comprising:

a golf club including a shaft having a club head with a golf ball striking face attached at one end and a grip portion attached to an opposite end;

a force sensing means including a plurality of sensors embedded within said club head each for sensing an impact of said striking face on a golf ball and generating a sensor signal representing characteristics of said impact;

a force circuit electrically connected to said force sensing means and being responsive to said sensor signals for generating an indication signal representing said characteristics of said impact; and

means responsive to said indication signal for indicating said characteristics of said impact including a force characteristic as a digital value and a graphic location characteristic impact location dots on an outline of said club head.