Method and apparatus for the ultrasonic measurement of the flow

Details Method and apparatus for the ultrasonic measurement of the flow Method and apparatus for the ultrasonic measurement of the flow

1975-08-11

1976-09-21

Ruehl, Charles A.

Measuring and testing

Volume or rate of flow

System

G01F 166

Patent

active

039811913

ABSTRACT:
Ultrasonic signals are transmitted alternately upstream and downstream in a fluent media. A reference signal timed to occur at the estimated time of arrival of the alternate signals is used to ascertain whether the actual signals arrive earlier or later than the reference signal. Control circuitry responsive to the early and late signals generates two signal levels associated with transmission direction which adjusts the time position of the reference signal until it coincides with the actual arrival times. One signal level is related to flow velocity. The other signal level is related to sound velocity in the fluent media.

REFERENCES:
patent: 3720105 (1973-03-01), Cirulis
patent: 3751979 (1973-08-01), Ims
patent: 3780577 (1973-12-01), Brown
patent: 3818757 (1974-06-01), Brown
patent: 3894431 (1975-07-01), Muston et al.

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