ULTRASONIC DIGITAL FLOWMETER Russian patent published in 2002 - IPC

FIELD: measurement technology. SUBSTANCE: flowmeter has n single-channel metering sections with two piezoelectric transducers, probing pulse switch, receive signal switch, amplifier, phase-locked loop, controlled self-excited oscillator, probing pulse shaper, T_meas-long pulse shaper, crystal oscillator, AND circuit. Control unit connected to frequency divider, number code generator, and computer is coupled with switches. Same circuit components are used in each of a number of acoustic channels wherein inflow and counter-flow sync rings are organized. EFFECT: enhanced measuring accuracy. 3 dwg