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. 08, 2012
Filed:
Apr. 27, 2006
Frank Künzler, Kraichtal, DE;
Udo Haberland, Holzgerlingen, DE;
Robert Rehner, Nuremberg, DE;
Jochen Weinzierl, Nuremberg, DE;
Lorenz-peter Schmidt, Heβdorf, DE;
Frank Künzler, Kraichtal, DE;
Udo Haberland, Holzgerlingen, DE;
Robert Rehner, Nuremberg, DE;
Jochen Weinzierl, Nuremberg, DE;
Lorenz-Peter Schmidt, Heβdorf, DE;
Valeo Schalter und Sensoren GmbH, Bietigheim-Bissingen, DE;
Abstract
An apparatus and a method for determining a distance (r) to a target object () proposes transmitting electromagnetic waves in the form of a transmission signal () by a transmitter (), receiving at least one part of said transmission signal () reflected by a the target object () in the form of a reception signal () by receiving device () and evaluating the reception signal () according a reference signal () which has a known phase difference with respect to the transmission signal () and a frequency equal to the frequency thereof. The reference () and reception () signal frequencies are reduced in a frequency divider () with the same predefined divider factor (x) while preserving the existing phase difference between the reference signal () and the reception () signal in such a way that a reduced frequency reception signal (') and a reduced frequency reception signal () are obtained. The frequency difference between the reduced frequency reception signal (′) and reduced frequency reception signal (′) is evaluated in order to determine the distance (R).