Method for monitoring an operating condition of a tube wall contacted by a flowing medium and inline measuring device therefore

US7562586B2 · kind B2 · utility

Assignee

• Endress+Hauser Flowtec AG · CH

Inventors

• Alfred Rieder · Landshut, DE
• Michael Fuchs · Bad Wörishofen, DE
• Wolfgang Drahm · Erding, DE

Key dates

• Filing date: Oct 23, 2006
• Grant date: Jul 21, 2009
• Expiry date: Oct 23, 2026

Classification

• Technology area (CPC G): Physics
• CPC primary: G01F15/024
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

An inline measuring device comprising a measurement pickup of vibration-type and measuring device electronics electrically coupled with the measurement pickup. The measurement pickup includes at least one, essentially straight measuring tube, an exciter mechanism acting on the measuring tube for causing the at least one measuring tube to vibrate, during operation, with torsional oscillations about a torsional oscillation axis, and a sensor arrangement for registering vibrations of the at least one measuring tube and delivering at least one oscillation measurement signal representing oscillations of the measuring tube. The measuring device electronics delivers, at least at times, an exciter signal driving the exciter mechanism and generates, by means of at least one of: the at least one oscillation measurement signal and the exciter signal, at least one measured value, which represents at least one physical, measured variable of the medium to be measured.