Measuring system for media flowing in a pipeline

US8316722B2 · 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: Nov 27, 2012
• Expiry date: Feb 2, 2031

Classification

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

Abstract

The measuring system comprises: a measuring transducer, through which medium flows during operation and which serves for producing oscillatory signals dependent on a viscosity of the flowing medium and/or a Reynolds number of the flowing medium; transmitter electronics for driven the measuring transducer and for evaluating oscillatory signals delivered by the measuring transducer. The measuring transducer includes: an inlet-side flow divider; an outlet-side flow divider; at least two, mutually parallel, straight, measuring tubes, connected to the flow dividers; as well as an electromechanical exciter mechanism for exciting and maintaining mechanical oscillations of the at least two measuring tubes. Each of the at least two measuring tubes opens with an inlet-side measuring tube end into a flow opening and with an outlet-side. 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 opposite-equal torsional oscillations of the at least two measuring tubes.