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Patent
Title

Verfahren und Sensor zum Nachweis von Sauerstoff

Other Title
Sensor for detecting oxygen in exhaust gas of internal combustion engine, has device for ozone generation and supplying measuring gas, where oxygen contained in measuring gas is partially converted into ozone detected by ozone sensor
Abstract
(A1) Die Erfindung betrifft einen Sensor zum Nachweis von Sauerstoff in einem Messgas, enthaltend eine Einrichtung zur Ozonerzeugung, welcher das Messgas zufuehrbar ist und mit welcher im Messgas enthaltener Sauerstoff zumindest teilweise in Ozon umsetzbar ist, und einen Ozonsensor, mittels welchem das Ozon nachweisbar ist. Weiterhin betrifft die Erfindung ein Verfahren zum Nachweis von Sauerstoff in einem Messgas, welches die folgenden Schritte enthaelt: Zufuehren des Messgases zu einer Einrichtung, welche im Messgas enthaltenen Sauerstoff zumindest teilweise in Ozon umsetzt, und Nachweisen von Ozon mittels eines Ozonsensors.

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DE 102009049908 A1 UPAB: 20110511 NOVELTY - The sensor (1) has a device (50) for ozone generation and supplying a measuring gas. Oxygen contained in the measuring gas is partially converted into ozone by the device. The ozone is detected by an ozone sensor (60) e.g. photometer and/or electrochemical sensor and/or resistance sensor (61). The resistance sensor contains a measuring layer comprising metal oxide i.e. indium oxide. The resistance sensor comprises a radiation source e.g. LED, and electromagnetic radiation with wavelength of smaller than 415 nanometer is produced by the source. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for a method for detecting oxygen in measuring gas. USE - Sensor for detecting oxygen in a measuring gas i.e. exhaust gas, of an internal combustion engine. ADVANTAGE - The oxygen contained in the measuring gas is partially converted into the ozone by the ozone generation device, and the ozone is detected by the ozone sensor, thus regenerating the measuring layer by thermal or photonic stimulated desorption in a simple manner, and hence detecting oxygen with increased sensitivity.
Inventor(s)
Wang, C.
Cimalla, Volker  
Ambacher, Oliver  
Link to:
Espacenet
Patent Number
102009049908
Publication Date
2009
Language
German
Fraunhofer-Institut für Angewandte Festkörperphysik IAF  
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