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:
Sep. 20, 2011
Filed:
Aug. 01, 2008
Applicant:
Rainer Hauser, Nürnberg, DE;
Inventor:
Rainer Hauser, Nürnberg, DE;
Assignee:
Siemens Aktiengesellschaft, Minich, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01R 23/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
A method for ascertaining a mains frequency from a voltage signal which has a particularly high proportion of harmonics includes stipulating a sample frequency for a sample collection, polling a voltage signal at equidistant times during periods of the sample oscillation. A discrete Fourier transform may be used to calculate two phases, and a phase interval between these two phases is used to infer the mains frequency.