Degree of hardness measurement system and degree of hardness measurement method
US9055893B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 26, 2012 |
| Grant date | Jun 16, 2015 |
| Priority date | — |
| Expiry date | Mar 25, 2033 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N2203/0076
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
For measuring hardness of an object, a measurement apparatus is pushed against the object and a degree of hardness calculation system calculates hardness based on information from the measurement apparatus. The measurement apparatus includes an acceleration sensor which outputs first information of acceleration of a contact area of the measurement apparatus, and a second sensor, such as a magnetic sensor or a pressure sensor, which outputs second information based on pressure applied to the contact area. The degree of hardness calculation system generates a second-derivative waveform by twice differentiating a waveform based on the output of the second sensor, compares the second-derivative waveform and the information of acceleration from the acceleration sensor, and calculates hardness of the object based on the comparison result.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.