Method for evaluating hit feeling

1. A method for quantitatively evaluating hit feeling of a sport hitting tool, the method comprising:

using a sensor to measure forces F acting between a swing subject and the sport hitting tool or specific directional components F 1 thereof to obtain values of the forces F or the components F 1 generated by impact for a first time period;

sending readings from the sensor to a computer;

deciding the hit feeling based on a correlation between the hit feeling and the value of the force F or the component F 1 by a summation of forces or the components during the first period or a rate of change in the forces or the components during the first time period.

2. The method according to claim 1 , wherein the values of the forces F or the components F 1 in a specified period Z 12 between a time T 1 and a time T 2 after the impact are obtained in time series, and the hit feeling is evaluated based on an integrated value Sf of the forces F or the components F 1 in the specified period Z 12 .

3. The method according to claim 1 , wherein the values of the forces F or the components F 1 in a specified period Z 12 between a time T 1 and a time T 2 after the impact are obtained in time series, and the hit feeling is evaluated based on a rate Rd of change of the forces F or the components F 1 in the specified period Z 12 .

4. The method according to claim 2 , wherein the time T 1 is a time Tmin when the forces F or the components F 1 reach the minimum in a predetermined period.

5. The method according to claim 4 , wherein when a time when the forces F or the components F 1 reach the maximum between an impact time Tp and a time after 50 msec from the impact time Tp is defined as Tmax, the time Tmin is a time when the forces F or the components F 1 reach the minimum between the impact time Tp and the time Tmax.

6. The method according to claim 1 , wherein the measuring means M 1 includes a pressure sensor provided between the swing subject and the sport hitting tool, and

a setting position of the pressure sensor is determined based on comparison of a distribution of the forces F or the components F 1 in a practice swing with a distribution of the forces F or the components F 1 in actual hitting.

7. The method according to claim 1 , wherein the measured data is sifted through in consideration of uniformity of a swing speed and/or uniformity of a hitting point.

8. The method according to claim 2 , wherein the specified period Z 12 is equal to or less than 100 msec.

9. The method according to claim 1 , further comprising the steps of:

measuring the force F or the component F 1 in actual hitting and the force F or the component F 1 in a practice swing; and

selecting a position at which a difference between the force F or the component F 1 in the actual hitting and the force F or the component F 1 in the practice swing is equal to or greater than a threshold value A, as a measured area.

10. The method according to claim 1 , further comprising the step of selecting the measured data,

wherein the step of selecting the measured data includes the steps of:

determining a threshold value B as a range of variation in a head speed;

determining a threshold value C as a range of variation in a hitting point; and

selecting the measured data based on the threshold value B and the threshold value C.

11. The method according to claim 1 , further comprising the step of selecting the measured data,

wherein the step of selecting the measured data includes the steps of:

determining a threshold value D; and

selecting the measured data when the minimum value of the forces F or the components F 1 at times later than the impact is equal to or less than the threshold value D.