FIELD: monitoring and measuring equipment.
SUBSTANCE: invention relates to control and measurement equipment and methods of processing one or more sensor signals in a flow meter and can be used in instrument-making during development and manufacturing of inertial flow meters. Method consists in using the signal representation from the inertial flow meter position sensors in the form of a sum of complex exponentials with unknown parameters. This allows after samples of signals to obtain a set of readings, each of which, in turn, will also be a sum of corresponding partial components with the same parameters, which can be presented in form of 
, n=0…S>N, where lower digital index denotes sensor number, R1(2),k, ω1(2),k, α1(2),k – complex amplitude, frequency and attenuation of the k-th harmonic of the corresponding sensor, 
M is the number of exponential components in the analyzed signal, N is the discrete number in the evaluation window, ε1(2),k(t) is the additive noise component of the corresponding signal. Used signal model enables to calculate the parameters R1(2),k, ω1(2),k, α1(2),k by method of matrix beams (method 1) or vector method of matrix beams (method 2), and from them to calculate required frequency and phase difference in accordance with expressions
For the second method, by the assumption of the poles identity, equations α1,k,n=α2,k,n and ω1,k,n=ω2,k,n. Further, these parameters are transmitted to a flow parameter estimation system, after which the next n+1th unit of readings arrives into the system, which is equivalent to shifting the evaluation window by one sampling cycle, and the cycle of calculations is repeated again.
EFFECT: high accuracy of measuring mass and volume flow rate of a liquid medium in the presence of a perturbing phase (gas or solid) in inertial flow meters by reducing the number of samples and, accordingly, the time required to obtain the current flow rate.
2 cl, 9 dwg
