Device for characterizing a size distribution of electrically-charged airborne particles in an air flow
US8627733B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Dec 8, 2008 |
| Grant date | Jan 14, 2014 |
| Priority date | — |
| Expiry date | Apr 10, 2030 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N15/0266
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A device (1,2) for characterizing a size distribution of electrically-charged particles in an air flow (50), comprising: a particle charging unit (60), a parallel arrangement of a first measurement section (10) and a second measurement section (20), located downstream from the particle charging unit (60), and a data evaluation unit (40), wherein the first measurement section (10) comprises: a first particle sensing unit (11) arranged to precipitate substantially all entering electrically-charged particles, and to generate a first output signal (41), the second measurement section (20) comprises: a second particle sensing unit (21) arranged to precipitate at least part of all entering electrically-charged particles, and to generate a second output signal (42), and a first particle precipitation unit (22) arranged to partially reduce the concentration of electrically-charged particles having a size larger than a first particle size limit, the data evaluation unit (40) for calculating a particle number concentration and an average diameter based on first and second output signals.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.