Method for operating a resonance measuring system

US8915147B2 · kind B2 · utility

Assignee

• KROHNE Messtechnik GmbH · DE

Inventors

• Kourosh Kolahi · Duisburg, DE
• Ralf Storm · Essen, DE

Key dates

• Filing date: Nov 18, 2011
• Grant date: Dec 23, 2014
• Expiry date: Mar 15, 2032

Classification

• Technology area (CPC G): Physics
• CPC primary: G01N9/002
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

A method for operating a Coriolis mass flowmeter in which a simple and reliable detection of a multi-phase flow is implemented by determining at least one first measured value for at least one state variable that is dependent on the amplitude in a multi-phase medium, exciting the measuring tube with the oscillation generator to oscillate at a predetermined oscillation frequency and a first amplitude, and to oscillate with the excitation frequency and a second amplitude, detecting the resulting oscillation of the measuring tube and determining at least a second measured value for the state variable that is dependent on the amplitude in a multi-phase medium from the determined resulting oscillation, and using the deviation of at least one of the first measured value from at least a corresponding second value as an indicator for the presence of a multi-phase flow.