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:
Apr. 07, 2009
Filed:
Mar. 18, 2004
Herbert Thanner, Graz, AT;
Herbert Thanner, Graz, AT;
AVL List GmbH, Graz, AT;
Abstract
The invention relates to a method and device for determining the redox state of an anode (), which is coated with a catalyst material or consisting thereof, associated with a high temperature fuel cell () or a reaction surface () of a reformer (). According to the invention, at least one first resonator () of a piezoelectric sensor device () is arranged in the anode gas flow () of the high temperature fuel cell or in the gas flow of the reformer (). The first resonator () is provided with a coating () which is oxidizable or reducible in the gas flow. The device also comprises a device () for measuring at least one modification of the resonance behaviour of the first resonator (). The detected measuring value acts as an indicator of the redox state of the anode () of the high temperature fuel cell () or reaction surface () of the reformer ().