Sensing thickness of a thin body disposed between two diverse su

Details Sensing thickness of a thin body disposed between two diverse su Sensing thickness of a thin body disposed between two diverse su

1976-06-11

1977-08-30

Gill, James J.

Measuring and testing

Liquid analysis or analysis of the suspension of solids in a...

Content or effect of a constituent of a liquid mixture

G01N 2900

Patent

active

040446069

ABSTRACT:
The thickness of a layer of oil on water is obtained in digital form, which in one embodiment is recorded on a visually identifiable analog type display chart. An underwater ultrasonic transducer arrangement produces and receives pulses, which are digitalized and processed in a digital computer for thickness calculation and organization for the display. To handle a wide range of signal conditions that need be detected at various interfaces, such as water to oil and the oil to air, a dynamic threshold is computed that permits the detection and processing of signals appearing at two diverse interfaces in conventional signal processing circuits that therefore can handle a large range of different signal conditions, thus permitting measurement of the thickness of a liquid layer of oil on the surface of water. The thickness of other fluids interposed between fluids having dissimilar acoustical properties can also be obtained.

REFERENCES:
patent: 3260105 (1966-07-01), McNulty
patent: 3267416 (1966-08-01), Morse
patent: 3616682 (1971-11-01), Golis et al.
patent: 3690154 (1972-09-01), Wells et al.
patent: 3827287 (1974-08-01), Boggs et al.
patent: 3930404 (1976-01-01), Ryden

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