Method and device for counting objects
US9817027B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Feb 21, 2013 |
| Grant date | Nov 14, 2017 |
| Priority date | — |
| Expiry date | Jan 5, 2034 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06M11/00
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
In the field of the counting of objects, a use is provided of a photosensitive assembly comprising at least one photodiode or one photoresistor, and a source of uniform illumination for illuminating the assembly, the establishment of a reference current supplied by the photosensitive assembly for an illuminated region of this assembly corresponding to a given fraction of the surface of the assembly, the disposition of objects to be counted against the photosensitive assembly, the illumination of the assembly by the source, the objects masking a part of the surface of the assembly, measurement of the current supplied by the assembly, and determination of a ratio between measured current and reference current to deduce the proportion between the surface area of photosensitive element illuminated and the surface area masked by the objects disposed. From this ratio, information on the number of objects disposed on the photosensitive assembly is extracted.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.