Viscometer

专利名称：Viscometer

发明人：Wolfgang Drahm,Alfred Rieder申请号：US10226242申请日：20020823

公开号：US20030056574A1公开日：20030327

专利附图：

摘要：The viscometer provides a viscosity value (X) which represents the viscosity of afluid flowing in a pipe connected thereto. It comprises a vibratory transducer with at leastone flow tube () for conducting the fluid, which communicates with the pipe. Driven by anexcitation assembly (), the flow tube () is vibrated so that friction forces are produced in

the fluid. The viscometer further includes meter electronics () which feed an excitationcurrent (i) into the excitation assembly (). By means of the meter electronics (), a firstinternal intermediate value (X) is formed, which corresponds with the excitation current (i)and thus represents the friction forces acting in the fluid. According to the invention, asecond internal intermediate value (X), representing inhomogeneities in the fluid, isgenerated in the meter electronics (), which then determine the viscosity value (X) usingthe two intermediate values (X, X). The first internal intermediate value (X) is preferablynormalized by means of an amplitude control signal (Y) for the excitation current (i), theamplitude control signal corresponding with the vibrations of the flow tube (). As a result,the viscosity value (X) provided by the viscometer is highly accurate and robust,particularly independently of the position of installation of the flow tube ().

申请人：DRAHM WOLFGANG,RIEDER ALFRED

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