VIBRATION-TYPE MEASUREMENT TRANSDUCER AND MEASUREMENT SYSTEM FORMED THEREWITH

摘要

Disclosed is a measurement transducer comprising a measurement tube (M), which has an inlet-side tube end (M+), an outlet-side tube end (M#), a tube wall with a pre-defined wall thickness, and a lumen, which extends between the first and second tube ends of the measurement tube and which is enclosed by said tube wall, further comprising a support element (TE), which is mechanically connected at one support end (TE+) to the tube end (M+) and at one support end (TE#) to the tube end (M#), and a support element (TS), which is laterally spaced from the measurement tube and which is mechanically coupled at one support end (TS+) to the support end (TE+) and at one support end (TS#) to the support end (TE#). The measurement tube of the measurement transducer is provided to guide a flowing medium in its lumen and to simultaneously be allowed to vibrate about a static rest position in order to generate Coriolis forces. The measurement transducer also comprises a vibration exciter (E) and at least one vibration sensor (S1; S2). The measurement transducer possesses a use mode, which has a resonance frequency and in which the measurement tube (M) can execute use vibrations around its static rest position at a use frequency that corresponds to the resonance frequency of the use mode, which use vibrations are suitable for generating Coriolis forces. The vibration exciter (E), of which one exciter component (E1') is arranged externally on the measurement tube (M) and one exciter component (E1") is arranged on the support element (TE), is also provided to induce said use vibrations in the measurement tube, and the vibration sensor, of which one sensor component (SV) is arranged externally on the measurement tube (M) and one sensor component (SV) is arranged on the support element (TS), is provided to detect movements of the measurement tube (M) relative to the support element (TS) and to transduce said movements into a vibration signal that represents vibrations of the measurement tube.