Patent ID: 7854176
Filing Date: 2010-12-21
Classification: G01F

Abstract:
1. A method for ascertaining the mass-flow of a Coriolis mass-flow meter, comprising the steps of: producing a measuring tube oscillation of frequency f; registering the oscillatory movement of the measuring tube at two different measuring points with two oscillation sensors; converting the analog sensor signals of the two oscillation sensors into digital sensor signals, wherein the two sensor signals do not necessarily have equal amplitudes and no controlling to equal amplitudes is done; forming sum signal Σ and difference signal Δ from the two sensor signals; rotating the sum signal by 90°; multiplying the shifted sum signal by the difference signal Δ; ascertaining amplitude of the sum signal Σ; and ascertaining the mass-flow {dot over (m)}˜|Im(Δ)|/(|Σ|f).