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, 2020
Filed:
Feb. 15, 2018
Avl List Gmbh, Graz, AT;
Bernd Eichberger, Graz, AT;
Viktor Hacker, Graz, AT;
Stephan Weinberger, Graz, AT;
Reinhard Klambauer, Hart-Purgstall, AT;
AVL List GmbH, Graz, AT;
Abstract
A measuring routine for monitoring the operating state of a fuel cell arrangement consisting of at least one fuel cell, in which the fuel cell arrangement has an operating load connected to it, at least one power amplifier for supplying at least one low-frequency signal (s(t), s(t)) is further provided, the output of which is coupled to the fuel cell arrangement, and having an evaluation device, likewise coupled to the fuel cell arrangement, for capturing a signal response s(t) to the at least one supplied signal s(t), wherein the fuel cell arrangement () has two or more individual signals (s(t), s(t)) at different frequencies (f, f) supplied to it and the evaluation device is set up to capture the signal response s(t) for selected frequencies (fa, fa) of the intermodulation products (mfe+/−nfe) of the supplied individual signals (s(t), s(t)) and to measure at least the amplitude of said signal response in order to obtain at least one output signal (S, S', S″).