Acoustic fluid velocity measuring system

Details Acoustic fluid velocity measuring system Acoustic fluid velocity measuring system

1979-03-21

1981-04-21

Ruehl, Charles A.

Measuring and testing

Volume or rate of flow

By measuring vibrations or acoustic energy

73189, G01F 166

Patent

active

042625459

ABSTRACT:
An acoustic fluid velocity measuring system includes mutually perpendicular arms disposed in the direction of the rectangular components of the fluid velocity, with each arm supporting two transmitting and two receiving electro-acoustic transducers. Pulses of ultrasonic energy are transmitted and received in and against the direction of fluid flow. The transducers in each arm are arranged in separate electrical loops, each of which provides an output at a different frequency. The frequencies are compared to measure fluid speed and direction which appear on a digital display. The measurements are independent of ambient temperature and the transducers are heated so that the system operates under ice forming meteorological conditions.

REFERENCES:
patent: 2669121 (1954-02-01), Garman et al.
patent: 3978726 (1976-09-01), Shih
patent: 4003256 (1977-01-01), Donela et al.
J. H. Stichman-"A Sonic Velometer"-IEEE Transactions on Instrumentation and Measurement, vol. I.M.-23, No. 3, pp. 203-210, Sep. 1974. _

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