Measuring system for media flowing in a pipeline

US8333121B2 · kind B2 · utility

Assignee

• Endress+Hauser Flowtec AG · CH

Inventors

• Ennio Bitto · Aesch, CH
• Alfred Rieder · Landshut, DE
• Martin Anklin · Aesch, CH
• Christof Huber · Bern, CH
• Michael Kirst · Lörrach, DE

Key dates

• Filing date: Mar 11, 2010
• Grant date: Dec 18, 2012
• Expiry date: Jan 25, 2031

Classification

• Technology area (CPC G): Physics
• CPC primary: G01N11/16
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

A measuring system comprises: a measuring transducer, through which medium flows and which produces oscillatory signals dependent on medium viscosity and/or a Reynolds number of the flowing medium; and transmitter electronics for driving the measuring transducer and for evaluating oscillatory signals. The measuring transducer includes: four, mutually spaced, flow openings; an outlet-side flow divider with four, mutually spaced, flow openings; four, mutually parallel, straight, measuring tubes for conveying flowing medium, connected to the flow dividers electromechanical exciter mechanism. The transmitter electronics feeds, by means of an electrical driver signal supplied to the exciter mechanism, electrical excitation power into the exciter mechanism, while the exciter mechanism converts electrical excitation power at least partially into torsional oscillations of the first measuring tube, opposite-equal torsional oscillations of the second measuring tube, as well as into torsional oscillations of the third measuring tube, opposite-equal torsional oscillations of the fourth measuring tube.