Vibration sensing apparatus
US4870868A · kind A · utility
67Cited by
11References
21Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 27, 1988 |
| Grant date | Oct 3, 1989 |
| Priority date | — |
| Expiry date | Apr 27, 2008 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N29/045
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A sensing device is disclosed which produces a response when the point of impact between an object and a member occurs at a preselected location on the member. When the member vibrates after being impacted by the object, an oscillatory electrical signal is produced by a piezoelectric sensor. Appropriate circuitry is provided for analyzing the oscillatory electrical signal and for producing a response if the object impacted the member at the preselected location. The sensing apparatus is particularly useful in athletics for determining whether a game object contacted the athletic instrument at its "sweet spot".
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.