Apparatus for determining and/or monitoring a process variable of a medium
AssigneeEndress + Hauser GmbH + Co. KG
InventorsSergej Lopatin, Helmut Pfeiffer, Sascha D'Angelico
Life of this patent
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Abstract
An apparatus for determining and/or monitoring at least one process variable of a medium, including: at least one mechanically oscillatable membrane, which has a plurality of natural eigenmodes; and at least one driving/receiving unit, which excites the membrane to execute mechanical oscillations and/or which receives mechanical oscillations from the membrane. The driving/receiving unit and the membrane are embodied and matched to one another in such a manner, that the membrane executes only mechanical oscillations, which correspond to modes, which lie above the fundamental mode of the membrane.
Claims32
An apparatus for determining and/or monitoring at least one process variable of a medium, comprising:
- at least one mechanically oscillatable membrane, which has a plurality of natural eigenmodes;
- and
- at least one driving/receiving unit, which excites the membrane to execute mechanical oscillations and/or which receives mechanical oscillations from said membrane, wherein:
- said driving/receiving unit and said membrane are embodied and matched to one another in such a manner, that said membrane only executes mechanical oscillations, which correspond to modes, which lie above the fundamental mode of said membrane;
- and
- a side of said membrane facing the medium is free of oscillatable units.
Dependencies are inferred from the claim text.