Method and apparatus for ultrasonic measurement of the rate...

Details Method and apparatus for ultrasonic measurement of the rate... Method and apparatus for ultrasonic measurement of the rate...

G - Physics

01

F

349/39

G01F 1/66 (2006.01)

Patent

CA 1148649

Abstract of the Disclosure The disclosure teaches a method of ultrasonic measurement of rate of flow which includes the steps of simultaneously passing two auto-circulation pulse trains of opposite directions through a single acoustic channel and through the medium under control so that the instants at which the pulses of the trains are brought into co- incidence are eliminated. The pulses of one pulse train are used to phase synchronize a self-excited oscillator whose frequency is a whole number of times the repetition rate of that pulse train. The coincidence instants are eliminated by interrupting the same pulse train before a certain instant of coincidence and restoring it with the help of a pulse produced by the self-excited oscillator. The pulse is held out of coincidence with a pulse of the other pulse train. The rate of flow is determined as the difference between the repetition rates of the pulses of the trains by comparing the repetition rates of the pulses of the other train with the frequency of the self-excited oscillator. The disclosure also teaches an apparatus for carrying out the above method.

334023

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