Dynamic hardness testing using measurement of the scarton dynamic hardness (SDH)
US5804707A · kind A · utility
14Cited by
7References
24Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 14, 1995 |
| Grant date | Sep 8, 1998 |
| Priority date | — |
| Expiry date | Feb 14, 2015 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N33/008
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method and apparatus for determining the degree of dynamic hardness of a material, such as a sporting equipment item. The method includes the steps of impulsively exciting a surface of the material by impacting the surface against a second, relatively hard surface in contact with a force-measuring device, and then measuring a signal from the force-measuring device to determine a frequency-dependent spectrum of the force exerted by the excited surface on the second surface. From this data, a roll-off frequency is measured and then analyzed to determine the degree of dynamic hardness of the material.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.