Device for sensing a moving ball and method for computing parameters of moving ball using the same
US11364428B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 26, 2018 |
| Grant date | Jun 21, 2022 |
| Priority date | — |
| Expiry date | Aug 20, 2039 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA63B2220/89
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The present invention is not a method of directly calculating the rotational characteristics of a ball through frequency analysis of a received signal as in the prior arts, but a method of determining a final spin information by finding the spin information of the moving ball while approaching a ball trajectory predicted in terms of the trajectory of a moving ball using the position coordinate data of the ball to the trend data indicating the trend of the position coordinates of the moving ball. The present invention provides a method of finding the spin in terms of the trajectory of the moving ball, regardless of whether it is possible to check the frequency characteristics of the rotation of the ball from the signal reflected from the moving ball, and thus derives a fairly accurate and uniform spin calculation result.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.