Method for simulating run

• US 9,460,242 B2
• Filed: 02/27/2013
• Issued: 10/04/2016
• Est. Priority Date: 02/29/2012
• Status: Expired due to Fees

• Current Assignee: Sumitomo Rubber Industries Limited
• Original Assignee: Dunlop Sports Co. Ltd. (Sumitomo Rubber Industries Limited)
• Inventors: Kamino, Kazuya
• Primary Examiner(s): Gebresilassie, Kibrom K
• Application Number:
  US13/778,286
• Publication Number:
  US 20130226541A1
• Time in Patent Office: 1,315 Days
• Field of Search: None
• US Class Current: 1/1
• CPC Class Codes: A63B 2069/403 back or reverse spin
• CPC Class Codes: A63B 2220/20 Distances or displacements
• CPC Class Codes: G06F 30/20 Design optimisation, verification or simulation optimisation, verification or simulation of circuit designs G06F30/30

Abstract

This method simulates a run which is a distance between a landing point and a final arriving point using an initial condition of a hit ball and an actually measured falling condition. Preferably, the initial condition includes initial side spin. Preferably, the falling condition is a falling velocity. Preferably, a calculation formula of the run is a quadratic function having the initial condition and the falling condition as variables. Preferably, when the run is defined as Dr (yard); a target direction component of the falling velocity is defined as Vx (m/s); a vertical direction component of the falling velocity is defined as Vy (m/s); and the initial side spin is defined as S (rpm), the run is calculated according to the following formula: Dr=Ci×Vx2−C2×Vx+C3×Vy2+C4×Vy−Cs×S+C6.

Claims

1. A method comprising the steps of:

measuring an initial condition and a falling condition of a hit ball by using a measuring device, the hit ball being a golf ball hit by a golf club;

simulating, by a processor, a run which is a distance between a landing point and a final arriving point using the measured initial condition of the hit ball and the actually measured falling condition; and

generating information of the run of the hit ball for developing the golf ball or the golf club according to results of the step of simulating,

wherein the falling condition is a falling velocity, and the initial condition is only the initial side spin, and

wherein when the run is defined as Dr (yard);

a target direction component of the falling velocity is defined as Vx (m/s);

a vertical direction component of the falling velocity is defined as Vy (m/s); and

initial side spin is defined as S (rpm), the run is calculated according to the following formula;

Dr=C₁×

Vx²−

C₂×

Vx+C₃×

Vy²+C₄×

Vy−

C₅×

S+C₆,

wherein C₁ is no less than 0.09 but no more than 0.10, C₂ is no less than 2 but no more than 3, C₃ is no less than 0.1 but no more than 0.2, C₄ is no less than 5 but no more than 6, C₅ is no less than 0.0005 but no more than 0.001, and C₆ is no less than 80 but no more than 90.