FIELD: control-and-measuring equipment.
SUBSTANCE: invention relates to control-and-measuring instrumentation and can be used to control the pressure of fluids. Method for determining the pressure of a fluid pumped by a centrifugal pump with an asynchronous electric motor consists in measuring the pressure on the supply pipeline, the instantaneous values of the asynchronous motor currents and stator voltages. Three-phase values of currents and voltages are converted into two-phase components of currents and voltages. The modules of the vector voltage and stator current are determined, fed to the input of artificial neural network, previously trained according to the experimental data of the operation of the centrifugal pump with an asynchronous electric drive under various input influences both from the side of the frequency and the supply voltage amplitude, and from the side of the hydraulic resistance of the network and the input pressure .Using an artificial neural network, using the dependencies between the input and output data revealed during its training, intermediate values are determined by the fluid pressure formula, the data is filtered, thereby determining the instantaneous fluid pressure of a centrifugal pump with asynchronous electric drive. With the help of the artificial neural network, using the dependencies between the input and output data revealed during its training, intermediate values are identified using the fluid pressure formula; the data is filtered, thereby determining the instantaneous value of the fluid pressure of the centrifugal pump with asynchronous electric drive.
EFFECT: invention is aimed at expanding the range of tools for a similar purpose.
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