CORRELATION METHOD OF MEASUREMENT OF VOLUME FLOW RATE OF LIQUID ( VARIANTS ) AND FACILITY FOR ITS IMPLEMENTATION

摘要

FIELD: measurement technology. SUBSTANCE: invention can find use in various branches of industry to measure volume flow rate and velocity profile of flow of liquid. Correlation method of measurement of volume flow rate of liquid includes placement of M pairs of converters responding to inhomogeneities of parameters of flow of liquid in sections of flow rate measurement section spaced apart by distance L, determination of cross correlation functions R_jj(τ) of signals of each j-th pair of converters where j∈{1,2,...,M}, establishment of flow velocity of liquid u_j = L/τ_mj in M points by position τ_mj of maximum R_jj(τ), of cross correlation functions, reconstruction of velocity profile of flow of liquid u(S), by approximation by measured values of velocity u_j, where S is section area of flow rate measurement section, and determination of value of volume flow rate of liquid by found velocity profile u(S) of flow of liquid. There is also proposed another correlation method and facility for correlation measurement of volume flow rate of liquid. EFFECT: raised accuracy of measurement of volume flow rate of liquid. 3 cl, 7 dwg