| 摘要 |
FIELD: measurement technology. SUBSTANCE: proposed method employs device for periodic measurements of flow velocity Vx performed at equal intervals which includes first and second measuring lines and electronic unit; each measuring line connects total and static pressure lines. Mounted on walls of each measuring line at distance Lo from each other are two acoustic transducers: one transducer works in acoustic signal radiation mode and other transducer works in acoustic signal reception mode. Number of records of sounding impulse radiated by acoustic transducer in second measuring line is indicative of instantaneous flow rate. Electronic unit includes standard pulse generator, two sounding impulse generators, two amplifiers, two diodes, three electronic switches, AND-gate and recording and indicating circuit. EFFECT: increased resolving power. 3 cl, 3 dwg |
