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:
Jul. 18, 2017
Filed:
Jan. 21, 2015
Siemens Aktiengesellschaft, Munich, DE;
Ralf Bitter, Karlsruhe, DE;
Thomas Hankiewicz, Karlsruhe, DE;
Christoph Wolfgang Marquardt, Karlsruhe, DE;
Adrian Mucha, Karlsruhe, DE;
Jan Nygren, Göteborg, SE;
Kai-Uwe Pleban, Stutensee, DE;
Franz Steinbacher, Karlsruhe, DE;
Siemens Aktiengesellschaft, Munich, DE;
Abstract
A method for measuring the concentration of a gas component in a measuring gas. An absorption line of the gas component is varied as a function of the wavelength of the light of a wavelength-tunable light source within a periodically sequential scanning interval. The absorption line of the gas component is modulated with a frequency (f). Modulated light is guided through the measuring gas onto a detector. A measurement signal generated by the detector is demodulated upon determining a harmonic (nf) of the frequency (f). A measurement result is produced by fitting a setpoint curve to the profile of the demodulated measurement signal. Both demodulated measurement signal and setpoint cure are filtered with the aid of the same filter function. The filter function is operative to suppress noise signal components of the demodulated measurement signal that disturb both signal components of the demodulated measurement signal and the setpoint curve.