Measuring and operating circuit for a coriolis mass flowmeter

Details Measuring and operating circuit for a coriolis mass flowmeter Measuring and operating circuit for a coriolis mass flowmeter

G - Physics

01

F

G01F 1/84 (2006.01)

Patent

CA 2422218

According to the invention, a digital processor (DSP) is provided in a measuring and operating circuit for a Coriolis-type mass flowmeter. From the vibration sensor signals, said digital processor evaluates only the differential signal (D) and the one sensor signal (S1). The in-phase component (I) and the quadrature components (Q) are determined for the differential signal (D), and the amplification of the second sensor signal (S2) is controlled in such a manner that the in-phase component (I) vanishes. The mass flow rate (m) is determined from the quadrature component (Q).

L'invention concerne un circuit de mesure et de service pour un débitmètre massique à force de Coriolis. Ledit circuit comprend un processeur numérique (DSP) qui, parmi les signaux de capteurs d'oscillations, évalue uniquement le signal différentiel (D) et un premier signal de capteur (S1). La composante en phase (I) et les composantes en quadrature (Q) sont déterminées pour le signal différentiel (D) et l'amplification du deuxième signal de capteur (S2) est réglée de sorte que la composante en phase (I) s'évanouisse. Le débit massique (m) est déterminé à partir de la composante en quadrature (Q).

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