Infineon Technologies Ag

Deutsches Zentrum Fur Luft-und Raumfahrt E.v.

Franz Schreier

Volker Tank

Gerhard Poeppel

Peter Haschberger

Erwin Lindermeir

Dieter Kohlert

Birger Schimpp

A device can be used for establishing gas concentrations in an examination volume. A radiation source is configured to generate an electromagnetic beam. A beam guiding apparatus is arranged downstream of the radiation source. The beam guiding apparatus is configured to set a plurality of variations of beam guidance of the beam entering the beam guiding apparatus in an observation plane in the examination volume. A spectrometer is arranged downstream of the beam guiding apparatus. The spectrometer is configured to carry out a spectral analysis of the beam leaving the beam guiding apparatus. An evaluation unit is configured to establish in the observation plane a 2D concentration distribution for one or more gases in the examination volume on the basis of the spectral analysis for different variations of beam guidance.

Device for determination of gas concentration

For quantitative analysis of gas volumes, specifically combustion exhaust gases, by means of emission or absorption spectrometry in the ultraviolet, visible and infrared spectral range, geometrically defined and reproducibly adjustable observation planes are oriented perpendicular to the longitudinal axis of an exhaust stream. In a first series of measurements a number of m spectral measurements is performed, in such a way that the optical axis of a spectrometer is always located in the respective observation level but is shifted in a parallel direction by a first distance from one measurement to the next. In a second series of measurements n measurements are performed, in such a way that the optical axis is again located in the observation plane and is shifted in a parallel direction by a second distance from each measurement to the next. The (m&plus;n) measurements produce two orthogonal sets of line of sights, which form a grid with (m&middot;n) intersecting volumes. With the aid of the (m&plus;n) measurements, each measurement yields the spectral transmission &tgr;(v), or the spectral radiation intensity I(v) which is integrated via the total gas volume in the beam of rays of the spectrometer field of view.

Process for the quantitative analysis of gas volumes, specifically exhaust and waste gases from combustion systems or incineration plants, as well as systems for performing these processes

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Planegg, Germany

Franz Schreier