Method and measuring device for determining measurement information

A measuring device, comprising:

• a measuring tube at least one of receiving a fluid or conducting a fluid flow through said measuring tube;
• first oscillation transducers disposed on a side wall of said measuring tube;
• and
• a recording device configured to carry out a method for determining measurement information, the method including the following steps:
• driving said first oscillation transducers to excite first and second waves conducted in the side wall of the measuring tube in chronological succession, the first and second waves being conducted directly in the side wall or indirectly through the fluid to second oscillation transducers of the measuring device disposed on the side wall or on a further side wall of the measuring tube or along a propagation path back to the first oscillation transducers;
• using the first oscillation transducers or the second oscillation transducers to record first measurement data for the first wave and second measurement data for the second wave and determining the measurement information;
• in a first alternative determining the measurement information as a function of the first and second measurement data or in a second alternative using the first measurement data to determine a parameter of the excitation of the second wave and determining the measurement information as a function of the second measurement data;
• and
• in both alternatives:
• using a first and a second subgroup, the respective subgroup including one or more of the first or second oscillation transducers, for the recording, recording the first measurement data by adding measurement signals of the first and second subgroups together, and recording the second measurement data by subtracting measurement signals of the first and second subgroups from one another, or vice versa.