Patent · US Active

Method for measuring concentration of a gas component in a measurement gas

US9453765B2 · kind B2 · utility

2Cited by

6References

8Claims

0Family size

Assignee

Siemens Aktiengesellschaft · DE

Inventors

Daniel Depenheuer · Schwegenheim, DE
Thomas Hankiewicz · Karlsruhe, DE
Frank Probst · Landau in der Pfalz, DE

Key dates

Filing date	Dec 19, 2013
Grant date	Sep 27, 2016
Priority date	—
Expiry date	Nov 28, 2034

Classification

Technology area (CPC G)Physics
CPC primaryG01N21/47
WIPO fieldMeasurement
WIPO sectorInstruments

Abstract

A method in which the wavelength of the light of a tunable light source is varied periodically over an absorption line of interest for the gas component to measure the concentration of a gas component in a measurement gas based on one of two measurement methods of direct absorption spectroscopy and wavelength modulation spectroscopy and, where in the case of wavelength modulation spectroscopy, the wavelength of the light is additionally sinusoidally modulated at a high frequency and with a small amplitude, where the intensity of the light is detected after transradiation of the measurement gas and processed to yield a measurement result, and where in order to increase the accuracy and reliability of the measurement, the two measurement methods are applied simultaneously during each period, or alternately in consecutive periods, and their results are combined by averaging to form the measurement result.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.