Ultrasonic apparatus for measuring the flow velocity of a fluid

Details Ultrasonic apparatus for measuring the flow velocity of a fluid Ultrasonic apparatus for measuring the flow velocity of a fluid

1987-02-20

1988-06-07

Ruehl, Charles A.

Measuring and testing

Volume or rate of flow

By measuring vibrations or acoustic energy

G01F 166

Patent

active

047488573

ABSTRACT:
An ultrasonic measuring apparatus is provided for measuring the flow velocity of a fluid in a pipe. The apparatus includes a pair of sensors which are mounted on a pipe, and which alternately transmit and receive ultrasonic waves. When the actual sound velocity of the ultrasonic wave in the fluid is not known, a value is assumed, a flow rate is measured, correct sensor mounting positions are calculated and the actual sound velocity of the ultrasonic wave is then determined. If the assumed sound velocity differs from the calculated sound velocity by more than a predetermined amount, the assumed sound velocity is adjusted and the procedure is repeated. Therefore, even when the sound velocity of an ultrasonic wave in a particular medium is not known, an actual sound velocity can be calculated. Accordingly, the ultrasonic measuring apparatus can accurately measure the flow velocity and flow rate of a fluid.

REFERENCES:
patent: 3987674 (1976-10-01), Baumdel
patent: 4015470 (1977-04-01), Morrison

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