Measuring system having a vibration-type measuring transducer

US8881604B2 · kind B2 · utility

Assignee

• Endress+Hauser Flowtec AG · CH

Inventors

• Hao Zhu · Freising, DE
• Wolfgang Drahm · Erding, DE
• Alfred Rieder · Landshut, DE
• Vivek Kumar · Troy, US

Key dates

• Filing date: Aug 19, 2011
• Grant date: Nov 11, 2014
• Expiry date: Dec 9, 2032

Classification

• Technology area (CPC G): Physics
• CPC primary: G01F1/8477
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

A measuring system comprises: a measuring transducer of vibration type, through which fluid flows during operation, and which produces oscillation signals corresponding to parameters of the flowing fluid; as well as a transmitter electronics (TE), which is electrically coupled with the measuring transducer, and serves for activating the measuring transducer and for evaluating oscillation signals delivered by the measuring transducer. The measuring transducer (MT) includes: At least one measuring tube (10; 10′) for conveying flowing fluid; at least one electro-mechanical oscillation exciter (41) for actively exciting and/or maintaining bending oscillations of the at least one measuring tube in a wanted mode; and at least a first oscillation sensor (51) for registering vibrations of the at least one measuring tube, and for producing an oscillation signal (s1) of the measuring transducer, representing vibrations at least of the at least one measuring tube. The transmitter-electronics (TE), in turn, generates, by means of a signal component of the oscillation signal, which represents a bending oscillation mode, in which the at least one vibrating measuring tube executes bending oscilla…