Measuring device having at least one bent measuring tube for determining a mass flow measured value of a medium according to the Coriolis principle

A measuring device for determining a mass flow measured value of a medium, the measuring device comprising:

• a measuring sensor configured to operate according to the Coriolis principle, the measuring sensor comprising:
• a measuring tube configured to vibrate and to conduct the medium, the measuring tube having a measuring tube center line, wherein:
• the measuring tube is bent in a rest position;
• the measuring tube extends substantially in a mirror-symmetrical manner with respect to a measuring tube transverse plane, which perpendicularly intersects the measuring tube;
• the measuring tube center line extends in a measuring tube longitudinal plane, which is aligned perpendicular to the measuring tube transverse plane;
• and
• a measuring tube equatorial surface extends perpendicular to the measuring tube longitudinal plane along the measuring tube center line;
• an exciter adapted to excite bending vibrations in the measuring tube;
• a first pair of vibration sensors configured to detect the bending vibrations of the measuring tube and generate corresponding signals, the first pair of vibration sensors arranged in a mirror-symmetrical manner with respect to the measuring tube transverse plane;
• and
• an operating and evaluation circuit configured to drive the exciter, to receive the signals from the vibration sensors, and to determine a mass flow measured value of a medium flowing through the measuring tube,
• wherein the measuring tube includes a second pair of vibration sensors configured to detect the bending vibrations of the measuring tube, the second pair arranged in a mirror-symmetrical manner with respect to the measuring tube transverse plane, and
• wherein the first pair of vibration sensors is arranged on a first side of and offset from the measuring tube equatorial surface, and the second pair of vibration sensors is arranged on a second side of and offset from the measuring tube equatorial surface.