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:
Mar. 12, 2013
Filed:
Jul. 08, 2009
Jörg Gebhardt, Mainz, DE;
René Friedrichs, Göttingen, DE;
Beat Kramer, Windisch, CH;
Frank Kassubek, Rheinfelden, DE;
Steffen Keller, Constance, DE;
Jörg Gebhardt, Mainz, DE;
René Friedrichs, Göttingen, DE;
Beat Kramer, Windisch, CH;
Frank Kassubek, Rheinfelden, DE;
Steffen Keller, Constance, DE;
ABB Technology AG, Zurich, CH;
Abstract
A vibration-type measuring device includes an exciter arrangement which exerts a time-dependent force with at least one sinusoidal component at an adjustable excitation frequency on a measuring tube, through which a medium can flow, and causes the measuring tube to oscillate. The measuring device includes first and second sensors which are fitted to the measuring tube at different locations. The first and second sensors output first and second measurement signals, respectively. The measuring device includes an evaluation unit which determines a first phase shift between the first and second measurement signals and uses the determined phase shift to determine a measurement variable of the medium. The measuring device includes a phase comparator, which determines a second phase shift between the force and the average value of the first and second measurement signals, and a frequency generator which sets the excitation frequency on the basis of the second phase shift.