US 7,062,977 B2 · Vibratory transducer

Abstract

The transducer (1) has at least one at least temporarily vibrating flow tube (101) of predeterminable lumen for conducting a fluid. The flow tube (101) communicates with a connected pipe via an inlet tube section (103), ending in an inlet end, and an outlet tube section (104), ending in an outlet end, and in operation performs flexural vibrations about an axis of vibration joining the inlet and outlet ends. The flow tube (101) has at least one arcuate tube section (101c) of predeterminable three-dimensional shape which adjoins a straight tube segment (101a) on the inlet side and a straight tube segment (101b) on the outlet side. At least one stiffening element (111, 112) is fixed directly on or in close proximity to the arcuate tube segment (101c) to stabilize the three-dimensional shape. By means of the at least one stiffening element (111, 112), the cross sensitivity of the transducer (1) is greatly reduced, so that cross talks from pressure to mass flow signals are minimized and the accuracy of the transducer is improved.

Claims43

Dependent claims

A vibratory transducer, comprising:

at least one curved flow tube which communicates with a connected pipe conducting a fluid to be measured, said at least one curved flow tube including a first straight tube segment, a second straight tube segment, and at least one arcuate tube segment, said at least one arcuate tube segment adjoining said first straight tube segment and said second straight tube segment;
at least one vibration exciter for driving said at least one curved flow tube to perform vibrations;
an inlet-side first vibration sensor disposed at said first straight tube segment and an outlet-side second vibration sensor disposed at said second straight tube segment;
and
at least one stiffening element fixed on said at least one arcuate tube segment, said at least one stiffening element is adapted to stabilize a shape of said at least one arcuate tube segment and/or said at least one stiffening element is adapted to reduce a cross-sensitivity of the vibratory transducer to pressure.

2 more elements

Dependencies are inferred from the claim text.

Vibratory transducer

Life of this patent

Vibratory transducer

Life of this patent

Abstract

Claims43