Method for evaluating hit feeling
View Patent ↗The evaluation method includes a first step, by using measurement means M 1 which can measure force F acting between a swing subject and the sport hitting tool or a specific directional component F 1 thereof, obtaining measured value Vf of the force F or the force F 1 at time after the impact, and a second step of determining the hit feeling on the basis of the measured value Vf at least at the one time. Preferably, the force F or the force F 1 is force Fs containing a component in a shear direction. Preferably, in the first step, the measured values Vf in a specific interval Z 12 from time T 1 to T 2 after the impact are obtained chronologically. Preferably, the evaluation is made based on a difference between a maximum value and a minimum value of the measured values Vf.
1. A method for quantitatively evaluating hit feeling of a sport hitting tool, including:
a first step, by using measurement means M 1 which can measure force F acting between a swing subject and the sport hitting tool or a specific directional component F 1 thereof, obtaining measured values Vf of the force F or the force F 1 in a specific interval Z 12 from time T 1 to time T 2 after the impact, and
a second step of evaluating the hit feeling on the basis of the measured values Vf in the specific interval Z 12 , wherein the hit feeling is evaluated based on:
an integrated value Sf of the measured values Vf in the specific interval Z 12 , or
a change rate Rd of the measured values Vf in the specific interval Z 12 .
2. The evaluation method according to claim 1 , wherein the force F or the force F 1 is force Fs containing a component in a shear direction.
3. The evaluation method according to claim 1 , wherein the swing subject is a swing robot.
4. The evaluation method according to claim 1 , wherein
in the first step, the measured values Vf in the specific interval Z 12 from the time T 1 to the time T 2 after the impact are obtained chronologically.
5. The evaluation method according to claim 4 , wherein the time T 1 is the impact time Tp.
6. The evaluation method according to claim 4 , wherein the specific interval Z 12 is equal to or less than 100 msec.
7. The evaluation method according to claim 4 , wherein the time T 1 is time Tmin when the measured value Vf reaches the minimum in a predetermined interval.
8. The evaluation method according to claim 7 , wherein
if time when the measured value Vf reaches the maximum between the impact time Tp and time after a lapse of 50 msec from the tie Tp is defined as Tmax,
the time Tmin is time when the measured value Vf reaches the minimum between the impact time Tp and the time Tmax.
9. The evaluation method according to claim 1 , wherein in the first step, measurement data is sorted by considering uniformity of a swing speed and/or uniformity of hit points.
10. The evaluation method according to claim 1 , wherein
the measurement means M 1 includes a force sensor provided in at least one of the swing subject or the sport hitting tool, and
a measurement region by the force sensor is determined based on a comparison of a distribution of the measured values Vf in practice swinging and a distribution of the measured values Vf in actual hitting.
11. The evaluation method according to claim 10 , wherein the force sensor is a three-axis force sensor.
12. The evaluation method according to claim 1 , further including a selection step of selecting a measurement region, wherein
in the selection step, a pressure sensor provided in at least one of the swing subject or the sport hitting tool is used, and in the selection step, the measurement region is selected based on a comparison of a distribution of the measured values in the practice swinging with the pressure sensor and a distribution of the measured values in actual hitting with the pressure sensor, and
in the first step, the force F or the specific directional component F 1 thereof is measured in the measurement region selected in the selection step.
13. The evaluation method according to claim 12 , wherein in the first step, the force F or the specific directional component F 1 is measured by a three-axis force sensor.