Patent ID: 7077014
Filing Date: 2006-07-18
Classification: G01F

Abstract:
1. A measuring transducer of a vibration-type for a fluid flowing in a pipeline, which measuring transducer comprises: a measuring tube for conveying the fluid, inserted into the course of the pipeline and vibrating, at least at times, during operation; a first support element affixed to an inlet end and to an outlet end of said measuring tube; an electromechanical exciter arrangement for producing an exciter force, variable as a function of time, for causing said measuring tube to vibrate; a sensor arrangement for registering oscillations of said measuring tube; and a coupler arrangement connected with said measuring tube and support element and having at least one coupling element interacting mechanically, especially resiliently, with said vibrating measuring tube and said support element, wherein: said measuring tube, in operation, is excited by means of said exciter arrangement, at least at times, to an oscillation mode, in which it, at least in part, executes such bending oscillations about an oscillation axis imaginarily connecting the inlet end and the outlet end of said measuring tube, that it assumes predominantly an oscillation form having at least three bending-oscillation antinodes; said at least one coupling element of said coupler arrangement is mechanically coupled with said measuring tube and said support element such that it acts on said measuring tube in a region, especially a central region, of one of the three oscillation antinodes; and a spring constant, of said coupler arrangement, especially an essentially constant spring constant, determined by said at least one coupling element and effective between said measuring tube and said support element, lies above 0.5 times, especially in the range of 0.7 times to 1.3 times, a ratio, Q