DEVICE FOR DETERMINING THE FILL LEVEL OF A LIQUID IN A MEASUREMENT TUBE, AND FLOWMETER HAVING A DEVICE OF THIS TYPE

• Main Authors: PFLUGER STEFAN, MAYER WINFRIED
• Format: Patent
• Language: Chinese; English
• Published: 30.10.2020
• Subjects: MEASURING; MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUIDLEVEL; METERING BY VOLUME; PHYSICS; TESTING

The invention relates to a device (101) for measuring the fill level of a liquid comprising: a measurement tube (102; 202), which has a tube wall (110), which extends between a first and a second endtube opening and encloses a volume for guiding the liquid, a tube axis extending between the two tube openings; a first conductor (120; 122; 222), which at least partially extends around the volume and is electrically insulated from the volume; a second conductor (114; 124; 224), which at least partially extends around the volume and is electrically insulated from the first conductor and from thevolume, the two conductors (120; 122; 222; 114; 124; 224) extending substantially parallel to each other and forming a waveguide for microwaves; an HF circuit (182) for coupling a microwave signal into the waveguide and for receiving reflected microwave signals coupled out of the waveguide; an operating and evaluation circuit (184) for determining the fill level of the liquid in the measurement tube (102; 202) using the re