| 摘要 |
The invention relates to means of measuring engineering for use in systems for control and measurement of velocity and flow rate of liquid and gaseous products transported by pipelines. Method for determination of flow velocity and flow rate of liquid and gasous products includes emission of acoustic signals along flow and in counter-flow direction at different angles to axis of flow and determination of time of passage of basic distance by those signals. Additionally one measures noise component of acoustic signal from which one separates value of dispersion of spectrum of that component with determination of flow velocity V by formulaV = а+а&sgr;+ а⋅&sgr;, whereа, а, а– polynomial coefficients obtained at calibration,at that dispersion of spectrum of noise component &sgr; and spectrum of noise component are determined from dependences given. The invention provides increase of accuracy of measurement and control of parameters of flow of liquid and gaseous products. |
