CORIOLIS FLOW METRE (VERSIONS), METHOD FOR DETECTION OF RATIO BETWEEN AMPLIFICATIONS OF TWO BRANCHES OF SIGNALS PROCESSING IN CORIOLIS FLOW METRE AND METHOD FOR FLOW RATE MEASUREMENT

摘要

FIELD: physics, measurements.;SUBSTANCE: coriolis flow metre comprises at least one metering tube (3), in which oscillations are excited in metering mode and through which water is flowing, flow rate of which must be measured, the first (21) and second (23) detectors for registration of metering tube (3) oscillation dependent on flow rate and for generation of the first (S1) and second (S2) signals of detectors and two separate branches (37, 39) of signals processing. During measurement of flow rate, reference signal (R) is applied onto the first (S1) or second (S2) signal of detector. Auxiliary signal (H) produced by application passes through both branches (37, 39) of signals processing. From the first signal (S_Δ) at the outlet of the first branch (37) of signals processing, the first prepared reference signal (R1) is filtered, and from the second signal (S_Σ) at the outlet of the second branch (39) of signals processing, the second prepared reference signal (R2) is filtered, and based on prepared reference signals (R1, R2) ratio (V) is detected between amplifications of signal processing branches (37, 39).;EFFECT: provision of high accuracy of measurement.;12 cl, 6 dwg