The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 14, 2014
Filed:
Dec. 08, 2008
Johan Marra, Eindhoven, NL;
Johan Marra, Eindhoven, NL;
Koninklijke Philips N.V., Eindhoven, NL;
Abstract
A device () for characterizing a size distribution of electrically-charged particles in an air flow (), comprising: a particle charging unit (), a parallel arrangement of a first measurement section () and a second measurement section (), located downstream from the particle charging unit (), and a data evaluation unit (), wherein the first measurement section () comprises: a first particle sensing unit () arranged to precipitate substantially all entering electrically-charged particles, and to generate a first output signal (), the second measurement section () comprises: a second particle sensing unit () arranged to precipitate at least part of all entering electrically-charged particles, and to generate a second output signal (), and a first particle precipitation unit () arranged to partially reduce the concentration of electrically-charged particles having a size larger than a first particle size limit, the data evaluation unit () for calculating a particle number concentration and an average diameter based on first and second output signals.