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. 14, 2013
Filed:
Feb. 13, 2008
Method for determining and/or monitoring a process variable of a medium, and corresponding apparatus
Jürgen Meier, Maulburg, DE;
Alexander Müller, Sasbach-Jechtingen, DE;
Sascha D'angelico, Rümmingen, DE;
Franco Ferraro, Schwörstadt, DE;
Walter Rombach, Rheinfelden, DE;
Jürgen Meier, Maulburg, DE;
Alexander Müller, Sasbach-Jechtingen, DE;
Sascha D'Angelico, Rümmingen, DE;
Franco Ferraro, Schwörstadt, DE;
Walter Rombach, Rheinfelden, DE;
Endress + Hauser GmbH + Co. KG, Maulburg, DE;
Abstract
A method for determining and/or monitoring a process variable of a medium, wherein a mechanically oscillatable unit is supplied with an exciter signal wherein a received signal coming from the mechanically oscillatable unit is received, and wherein the exciter signal is produced in such a manner, that a phase difference between the exciter signal and the received signal equals a predeterminable phase value. A criterion for judging the determining of the phase difference between the exciter signal and the received signal, or a signal dependent on the exciter signal or on the received signal, is established; in the case, in which the criterion for judging the determining of the phase difference is fulfilled, tuning of the phase difference is closed-loop controlled; and, in the alternative case, tuning of the phase difference is open-loop controlled. An apparatus associated with the method is also disclosed.