Ultrasonic fluid flow measurement method and apparatus

Details Ultrasonic fluid flow measurement method and apparatus Ultrasonic fluid flow measurement method and apparatus

1992-02-07

1993-10-12

Chilcot, Jr., Richard E.

Measuring and testing

Volume or rate of flow

By measuring vibrations or acoustic energy

73642, G01F 166

Patent

active

052514900

ABSTRACT:
An apparatus for measuring the flow of a fluid in a pipe using ultrasonic waves. The apparatus comprises an ultrasonic generator, a lens for focusing the sound energy produced by the generator, and means for directing the focused energy into the side of the pipe through an opening and in a direction close to parallel to the long axis of the pipe. A cone carries the sound energy to the lens from the generator. Depending on the choice of materials, there may be a quarter-wave, acoustic impedance matching section between the generator and the cone to reduce the reflections of energy at the cone boundary. The lens material has an acoustic impedance similar to that of the cone material but a different sonic velocity so that the lens can converge the sound waves in the fluid. A transition section between the lens and the fluid helps to couple the energy to the fluid and assures it is directed as close to parallel to the fluid flow direction as possible.

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