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. 25, 2012
Filed:
Apr. 28, 2010
Miroslaw Wrobel, Karlstadt, DE;
Miroslaw Wrobel, Karlstadt, DE;
Wittenstein AG, Igersheim, DE;
Abstract
The present invention relates to a method for examining a medium (), comprising the following steps of: transmitting a measurement input signal () comprising at least one measurement frequency, wherein the measurement input signal () is coupled into a medium (); receiving a measurement output signal () emerging from the medium (); transmitting a counter measurement input signal () comprising at least one counter measurement frequency, wherein the counter measurement frequency essentially corresponds to the measurement frequency, and wherein the counter measurement input signal () is coupled into the medium () simultaneously and in an opposite direction to the measurement input signal (); receiving a counter measurement output signal () emerging from the medium (); calculating a Doppler correction by comparing the counter measurement input signal () with the counter measurement output signal () in terms of the counter measurement frequency and by comparing the measurement input signal () with the measurement output signal () in terms of the measurement frequency; calculating a phase shift between the at least one measurement frequency of the measurement input signal () and the corresponding measurement frequency of the measurement output signal (); correcting the phase shift as a function of the Doppler correction.