Liquid level sensor using sonic methods

Details Liquid level sensor using sonic methods Liquid level sensor using sonic methods

1983-11-09

1985-10-08

Frankfort, Charles

Measuring and testing

Liquid level or depth gauge

340621, G01F 2300

Patent

active

045452458

ABSTRACT:
A liquid level sensor includes a pair of sonic waveguides separated from and parallel to one another. The waveguide pair together define axially separated pairs of lens surfaces so that sonic pulses are coupled therebetween in a time phase relationship when liquid covers those lens pairs below the liquid level, cross coupling of those lens pairs above the liquid level thereby being prevented. Since the axial separation dimension of the lens pairs is known as well as the vessel geometry and location of the waveguide pair in the vessel, counting the pulses returned by virtue of such cross coupling of those lens pairs below the liquid level will establish accurate level detection by standard algorithmic techniques.

REFERENCES:
patent: 2753542 (1956-07-01), Rod et al.
patent: 3079596 (1963-02-01), Atkinson
patent: 3656134 (1972-04-01), Brown
patent: 3985030 (1976-10-01), Charlton

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