Ultrasonic sensor for the detection of gas bubbles

Details Ultrasonic sensor for the detection of gas bubbles Ultrasonic sensor for the detection of gas bubbles

1986-08-27

1988-02-02

Levy, Stewart J.

Measuring and testing

Vibration

By mechanical waves

73600, G01N 2900

Patent

active

047222247

ABSTRACT:
An ultrasonic sensor for non-invasive detection of air bubbles in a liquid flowing through a tube comprises two half-housings capable of being assembled together and two mutually opposed ultrasonic transducers, one installed in each of the half-housings. For acoustic coupling of the tube to the two mutually opposed ultrasonic transducers, each half-housing contains a chamber closed off by a flexible membrane and filled with a fluid highly transmissive of sound. The fluid displaced by the tube inserted between the two half-housings forces the membrane up in the form of a bulge on either side of the tube. In this way, an excellent contact is obtained between the chamber filled with sound-transmissive fluid and the tube. The membrane may be embedded into the side walls of the half-housings and cylindrically arched along the same.

REFERENCES:
patent: 3663842 (1972-05-01), Miller
patent: 3798961 (1974-03-01), Flambard et al.
patent: 3974681 (1976-08-01), Namery
patent: 4214484 (1980-07-01), Abts
patent: 4235095 (1980-11-01), Liebermann
patent: 4483343 (1984-11-01), Beyer et al.
patent: 4542644 (1985-09-01), Claytor et al.
patent: 4579123 (1986-04-01), Chen et al.

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