Mass flow meter on the coriolis principle

Details Mass flow meter on the coriolis principle Mass flow meter on the coriolis principle

G - Physics

01

F

73/132

G01F 1/84 (2006.01)

Patent

CA 1267794

Abstract A mass flow meter on the Coriolis principle comprises two parallel straight measuring tubes (2, 3). An oscillator (11) drives the measuring tubes in opposite senses at a fundamental oscillation and a superimposed harmonic. Sensors (14, 15) receive measuring signals from which an uncorrected mass flow (Q1) is derived. A frequency determining circuit (30) determines from a measuring signal (U1) the values of the resonance frequencies (f1, f3) of the fundamental oscillation and harmonic for the purpose of deriving therefrom a correcting value (k) which takes axial stresses in the measu- ring tubes (2, 3) into account to determine a corrected mass flow (Q2). In this way, a mass flow meter can be made which has slight lateral deflec- tion and gives accurate measuring results despite the occurrence of axial stresses. Fig.1

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