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:
May. 18, 2010
Filed:
Dec. 10, 2007
Jochen Gundlach, Wasserburg, DE;
Jaromir Palata, Friedrichshafen, DE;
Jochen Gundlach, Wasserburg, DE;
Jaromir Palata, Friedrichshafen, DE;
i f m electronic GmbH, Essen, DE;
Abstract
A capacitive sensor with at least one reference impedance () and at least one measuring condenser (), at least one electrical alternating signal source (), a current supply network () and an analysis unit () in which the reference impedance () and the measuring condenser () are connected via the current supply network () to the alternating signal source () and the analysis unit () in such a way that the charge and discharge currents of the reference impedance () and the measuring condenser () and/or an analysis signal from the analysis unit () that characterizes the charge and discharge currents of the reference impedance () and the measuring condenser () can be analyzed. As a result, the reference impedance () can be tuned. The capacitive sensor avoids—at least partially—drawbacks in the capacitive sensors known from the prior art in that the reference impedance can be tuned.