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:
Dec. 29, 2009
Filed:
Mar. 05, 2008
Jiawei Zhang, Stuttgart, DE;
Bernhard Opitz, Leonberg, DE;
Michael Horstbrink, Stuttgart-Feuerbach, DE;
Tobias Lang, Stuttgart, DE;
Axel Wenzler, Leonberg, DE;
Jiawei Zhang, Stuttgart, DE;
Bernhard Opitz, Leonberg, DE;
Michael Horstbrink, Stuttgart-Feuerbach, DE;
Tobias Lang, Stuttgart, DE;
Axel Wenzler, Leonberg, DE;
Robert Bosch GmbH, Stuttgart, DE;
Abstract
An ultrasonic flow sensor, in particular for determining the flow velocity of a medium flowing through a pipeline, has at least one ultrasonic converter for transmitting and/or receiving ultrasonic signals, an oscillator, which is connected with the ultrasonic converter, and an evaluation unit, which determines a phase shift of the ultrasonic signal that was received, with respect to a reference signal. The evaluation unit includes a plurality of quadrature demodulators, which operate with different demodulation frequencies and each determine phase information about the ultrasonic signal that was received, and when a vernier unit is provided, which determines—based on the individual pieces of phase information—a phase angle or a quantity proportional thereto.