FIELD: accounting of main pipeline efficiency. SUBSTANCE: flow is removed along measuring tube from zone of its partial blocking by full pressure line to zone of flow longitudinal section. Two planes of radiation and two planes of recording of monitoring pulses are set by means of two ultrasonic transducers positioned on measuring tube. The first monitoring pulse is formed at beginning of next measuring cycle. As soon as the pulse reaches recording planes, leading and trailing edges of information signal are formed. The second monitoring pulse is formed in the first radiation plane. When the pulse reaches the first recording plane standard and count pulses are formed. At moment of recording of preset standard pulse formation of the pulses is stopped, and instantaneous flow rate is judged by number of count pulses. Standard pulse repetition period is selected proportional to information signal duration, and repetition period of count pulses is corrected depending on duration of interval between moment of the first monitoring pulse radiation and moment of the second monitoring pulse recording. EFFECT: higher resolution. 2 cl, 3 dwg
