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:
Nov. 18, 2014
Filed:
Aug. 08, 2011
Martin Terence Cole, Patterson Lakes, AU;
Martin Terence Cole, Patterson Lakes, AU;
Siemens Aktiengesellschaft, Munich, DE;
Abstract
Particles to be detected are irradiated by first wavelength light and second wavelength light. The light that is scattered by the particles is converted into a first and second scattered-light signals. The two scattered-light signals are normalized with respect to one another such that the amplitude profile thereof approximately corresponds to larger particles such as dust and steam. Furthermore, an amplitude ratio is formed between the two scattered-light signals and an amplitude comparison value (90%) is set, which corresponds to a predeterminable particle dimension in the cross-over region between smoke and dust/steam. Mainly the first scattered-light signal is evaluated if the amplitude ratio exceeds the amplitude comparison value (90%) and a dust/steam-density signal is emitted. In the other case, mainly the second scattered-light signal that is evaluated and a smoke-density signal is emitted.