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:
Aug. 24, 1999
Filed:
Sep. 02, 1997
Applicant:
Inventor:
Peter Dreyer, Pansdorf, DE;
Assignee:
Dragerwerk AG, Lubeck, DE;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G01N / ; G01N / ; G01N / ;
U.S. Cl.
CPC ...
25033913 ; 25033912 ; 250343 ;
Abstract
An infrared optical gas-measuring system with two infrared radiation sources (1, 2) and with at least one multispectral sensor (5). The system is suitable for determining the concentrations of different components of a gas flow. The two infrared radiation sources (1, 2) radiate in different spectral ranges with two different cycle frequencies f.sub.1, f.sub.2. The rays emitted are first passed through a radiation coupler (3), after which they pass through the gas flow to be measured, which is limited by windows (8), at right angles to the direction of flow. The rays finally enter a multispectral sensor (5), of which there is at least one, for measuring the intensity.