Patent ID: 11933807
Assignee: ENDRESS+HAUSER FLOWTEC AG
Field: Measurement (Instruments)
Classification: CPC G | IPC G

Claim 0:
1. A measuring device for determining the density, the mass flow, or the viscosity of a gas-charged liquid, comprising: at least one oscillator which has at least one vibratable measuring tube for conducting the medium, and which has at least two vibrational modes whose natural frequencies depend upon the average density of the gas-charged liquid and on the gas volume fraction of the gas-charged liquid; at least one exciter for exciting both vibrational modes; at least one vibrational sensor for detecting vibrations of the oscillator; and an operating and evaluating circuit configured to apply an excitation signal to the exciter, to detect signals of the vibrational sensor, to determine current values of the natural frequencies of both vibrational modes of the oscillator and fluctuations of at least one of the natural frequencies on the basis of the signals of the vibrational sensor, wherein the operating and evaluating circuit is further configured to determine a first media state value on the basis of the fluctuations, wherein the operating and evaluating circuit is further configured to determine, on the basis of the two natural frequencies, a second media state value which represents a gas charge of the medium, wherein the operating and evaluating circuit is further configured to output a media state message into which the first media state value and the second media state value are incorporated; wherein the first media state value identifies a presence of free gas bubbles in the medium; wherein the second media state identifies a gas charge with microbubbles; wherein the operating and evaluating circuit is configured to further determine the second media state value as a function of a pressure value which represents the media pressure in the measuring tube; wherein the media state message contains, in addition to the first media state value information about which flow regime of the first media state value was determined, wherein the information about the flow regime comprises a flow measured value or a value range of the flow measured value, wherein the flow measured value comprises a flow velocity, a mass flow rate, a volume flow rate or a Reynolds number; wherein the media stage message identifies a state of the medium with regard to gas charge based on the presence of free gas bubbles and the gas charge with microbubbles.