ACOUSTIC FLOW METER Russian patent published in 1998 - IPC

FIELD: measurement technology. SUBSTANCE: acoustic flow meter has two reversible acoustical-electrical transducers 2,3 excited by generator 5, two-channel strobing circuit 6 including two delay lines 7,8, two strobe-pulse formers 9, 10 two switches 11, 12, two amplifiers 13, 14, third strobe-pulse former 15, third delay line 16, trigger 17, 2 AND-2 OR gate 18, time interval converter 19, two-channel synchroprocessor 20, and on-line storage 23. Automatic reference voltage regulator 28 introduced into flow meter improved accuracy of flow rate measurement by automatic tracking of variation of ultrasound spreading velocity in medium by reference voltage U_ref. EFFECT: higher measurement accuracy. 5 dwg , 1 tbl