Method, apparatus and system for portable device surface and material analysis
US9880046B2 · kind B2 · utility
0Cited by
2References
20Claims
0Family size
Assignee
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Key dates
| Filing date | May 14, 2015 |
| Grant date | Jan 30, 2018 |
| Priority date | — |
| Expiry date | Nov 13, 2035 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01H13/00
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method and apparatus for determining properties of at least one of a surface or materials adjacent to a portable device. The method includes windowing a segment of the received signal to remove an edge transients, computing the FFT power spectral density of the signal, determining a peak in the spectral energy at a frequency, finding local peaks by determining the difference in the signal amplitude is relation to a pre-determined threshold, and computing harmonic energy according to the local peaks and the difference and determining at least one property of the surface or material.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.