DEVICE (VERSIONS) AND METHOD OF DETERMINING MASS FLOW RATE BASED ON PHASE SHIT PROVIDED BY CORIOLIS FORCE Russian patent published in 2005 - IPC

FIELD: measurement technology.

SUBSTANCE: during process of measurement the first input signal from first shift detector which measures twist of oscillating flow meter tube with second input signal from second shift detector or with difference signal between first and second input signals to form output signal. First input signal is phase shifted by 90°. Second signal or difference signal between first and second signals are mixed with phase-shifted first signal to form the second output signal. Module and phase of vector of first and second output signals are calculated relatively each other. Phase of vector signal is proportional to mass flow rate. Device for measuring mass flow rate has to be two-channel sync amplifier. It has four phase-sensitive detectors, two phase-shifting units, two differential amplifiers which are connected with lower frequency filters and processor for calculating module and vector of difference signals relatively each other.

EFFECT: improved precision of measurement; widened working range; reduced consumption.

12 cl, 18 dwg