A method for determining the mode of a multiphase mixture in a pipeline using CBR technologies

摘要

FIELD: measuring equipment.SUBSTANCE: application: to determine the regime of multiphase mixture in the pipeline. Invention consists in the fact that the outer surface of the pipeline has a group of radiators installed, which are receivers at the same time, which sound (probe) a multiphase flow moving in the pipeline by ultrasonic vibrations of a given frequency, perpendicular to its longitudinal axis. Then it records the values of the received amplitudes of ultrasonic signals transmitted through the multiphase medium reflected from the phase interfaces (phases), the measured propagation time of these signals through the medium, also the group of values of the velocity of the mixture in the pipeline, the pressure in the pipeline, the temperature and the density of the mixture are taken into account. Further, the obtained results are converted into a digital form, convenient for processing, and the subsequent formation of a group of use cases that are then compared with the previously established reference use cases that are stored in program memory (as part of a microprocessor system) in the form of a use case library, the reference precedents correspond to a variety of different regimes of flow of a multiphase mixture. Selection of the most relevant use case in terms of importance occurs using CBR technology. At the same time, before starting the sounding of the flow, data on the flow velocity, pressure in the pipeline, temperature and density of the mixture are collected; for this purpose, an additional group of transducers recording this information, called the primary one, is installed on the outside of the pipeline. Thus, the information is recorded in the memory of the microprocessor information system to form a constantly evolving, growing use case library and, based on the comparison of the current case with the ever-increasing number of use cases from the use case library, the flow regime of the multiphase mixture in the pipeline is determined most accurately.EFFECT: technical result: increase in the accuracy of determining the flow regime of a multiphase flow in a pipeline.1 cl, 1 dwg