SENSOR AND METHOD FOR DETECTING OXIDES OF NITROGEN

The invention relates to a sensor (1) for detection of oxides of nitrogen forming part of a gas, comprising a substrate (2) consisting of a solid electrolyte on which a conductive pattern (3, 4) is arranged which comprises at least two parts forming an anode (3) and a cathode (4), a current (I) bein...

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Bibliographische Detailangaben
Hauptverfasser:	LUNDGREN, STAFFAN, AERLIG, ULF, HJORTSBERG, OVE
Format:	Patent
Sprache:	eng ; fre
Schlagworte:	GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES MEASURING PHYSICS TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE TESTING
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Beschreibung
Zusammenfassung:	The invention relates to a sensor (1) for detection of oxides of nitrogen forming part of a gas, comprising a substrate (2) consisting of a solid electrolyte on which a conductive pattern (3, 4) is arranged which comprises at least two parts forming an anode (3) and a cathode (4), a current (I) being produced in the sensor (1) in the presence of oxides of nitrogen and the anode (3) and the cathode (4) being connected to an external voltage source (5) which is adapted to drive the current (I) and to means (6) for measuring the current (I), which constitutes a measure of the concentration of oxides of nitrogen in said gas. The invention is characterized in that the sensor (1) is adapted to generate said current (I) by means of a transport of oxygen ions in the sensor (1) which essentially originates from oxides of nitrogen being part of the gas, independently from the content of oxygen in said gas. By means of the invention, an improved sensor for detection of oxides of nitrogen, in particular in connection with exhaust gas systems in vehicles, is provided. L'invention concerne un capteur (1) conçu pour détecter les oxydes d'azote dans un gaz. Ce capteur comprend un substrat (2) se composant d'un électrolyte solide sur lequel est placé un réseau de conducteurs (3, 4) constitué d'au moins deux parties formant une anode (3) et une cathode (4), du courant (I) étant produit dans le capteur (1) en présence d'oxydes d'azote. L'anode (3) et la cathode (4) sont connectées à une source de tension externe (5) conçue pour envoyer du courant (I) et à un moyen (6) de mesure du courant (I) permettant de mesurer la concentration d'oxydes d'azote dans ledit gaz. Le capteur (1) selon l'invention est conçu pour générer ledit courant (I) par transport d'ions oxygène dans ledit capteur provenant principalement des oxydes d'azote dans le gaz, quelle que soit la teneur en oxygène dudit gaz. Ainsi, on obtient un capteur perfectionné permettant la détection d'oxydes d'azote, plus particulièrement utile dans les systèmes pour gaz d'échappement de véhicules.