Ultrasonic flow meter

Details Ultrasonic flow meter Ultrasonic flow meter

1980-12-11

1985-10-08

Ruehl, Charles A.

Measuring and testing

Volume or rate of flow

System

7386125, 7386128, G01F 166

Patent

active

045452440

ABSTRACT:
An inexpensive flow meter with a special arrangement of a minimum of transducers always provides an accurate measure of flow of the fluid in a conduit irrespective of the condition of the fluid. Mode control switching circuitry including fluid condition detecting means selectively energizes one or two transmitters in the transducers each of which then feeds a beam of ultrasonic waves to the fluid. Receiver means in the transducers selectively receives both the transmission (transit) mode waves and the reflection (Doppler-shifted) mode waves in accordance with the current condition of the fluid. In one embodiment, the beam of ultrasonic waves uses a single path of travel extending from a transmitter and a receiver while in another embodiment, it uses dual parallel paths extending from two transducers and two receivers.

REFERENCES:
patent: 3766517 (1973-10-01), Fahrbach
patent: 3987673 (1976-10-01), Hansen
patent: 4028938 (1977-06-01), Eck

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