Method for measuring fluid velocity by measuring the Doppler fre

Details Method for measuring fluid velocity by measuring the Doppler fre Method for measuring fluid velocity by measuring the Doppler fre

1992-08-13

1994-05-31

Chilcot, Jr., Richard E.

Measuring and testing

Volume or rate of flow

By measuring vibrations or acoustic energy

324642, G01F 166

Patent

active

053158806

ABSTRACT:
A non-invasive method for measuring the velocity of a fluid surface flowing in a predetermined direction in a channel or flume 10 includes the steps of generating a microwave frequency electrical signal adapted to reflect from the fluid surface; spacing the generation of the electrical signal from the fluid surface; directing the signal along a line toward the fluid surface and opposite the predetermined direction and at an angle of between 30.degree. and 40.degree. to the fluid surface; detecting the signal reflected from the fluid surface; and determining from the directed and reflected signal the Doppler frequency shift therebetween as a measure of the velocity of the fluid surface.

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