Patent ID: 6840109
Filing Date: 2005-01-11
Classification: G01F,G01N

Abstract:
1. A vibratory transducer for a fluid flowing in a pipe, comprising: an essentially straight flow tube for conducting the fluid, said flow tube communicating with the connected pipe via an inlet tube section, ending in an inlet-side end of the flow tube, and an outlet tube section, ending in an outlet-side end of the flow tube, and said flow lube being at least intermittently vibrated in operation, an antivibrator fixed at the inlet-side end and the outlet-side end; an excitation assembly acting on the flow tube and the antivibrator for vibrating at least the flow tube; and a sensor arrangement for sensing vibrations of the flow tube, wherein in operation at least a portion of the flow tube performs torsional vibrations about an axis essentially aligned with the inlet lube section and the outlet tube section, particularly in order to produce shear forces in the fluid; and wherein an internal portion of the transducer, formed at least by the flow lube, the antivibrator, the sensor arrangement, and the excitation assembly and mounted at least on the inlet and outlet lube sections, has a centroid which is located within the flow tube.