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:
Jan. 13, 2015
Filed:
Oct. 30, 2009
Rolf Melcher, Karlsruhe, DE;
Erhard Musch, Werne, DE;
Erhard Schweninger, Karlsruhe, DE;
Roberto Zawacki, Kraichtal, DE;
Rolf Melcher, Karlsruhe, DE;
Erhard Musch, Werne, DE;
Erhard Schweninger, Karlsruhe, DE;
Roberto Zawacki, Kraichtal, DE;
Mechaless Systems GmbH, Karlsruhe, DE;
ELMOS Semiconductor AG, Dortmund, DE;
Abstract
The interference-compensated sensor for detecting an object located in a detection area in a contactless manner, particularly a rain sensor, is provided with a first and a second measuring channel each having a control device and an output, wherein both measuring channels are substantially identical. The sensor further comprises a main subtractor having an output for outputting the difference of the signals at the outputs of the measuring channels. The sensor is provided with a controller unit having an input that is connected to the output of the main subtractor and with an output for outputting a controller signal, by means of which the two measuring channels can be controlled in such a way that the signal at the output of the main subtractor can be controlled to zero. By means of the magnitude of the signal at the output of the controller, it can be determined if an object is located in the detection area.