Sonic echo-sounder for the measurement of levels of substances

Details Sonic echo-sounder for the measurement of levels of substances Sonic echo-sounder for the measurement of levels of substances

1976-10-05

1978-07-18

Farley, Richard A.

Communications: electrical

Selective

73290V, 181400, 310334, 340 8MM, G01S 968, G01F 2328

Patent

active

041018656

ABSTRACT:
An acoustic echo-sounder arranged to determine the level of a substance in a container. The echo-sounder includes an acoustic transducer fitted to one end of an acoustic wave-guide, the acoustic impedance of which is progressively matched to the acoustic impedance of the space containing the substance in order to avoid disturbing reflections. In a preferred embodiment, the end portion of the acoustic wave-guide is constructed so that its solid cross-section diminishes progressively towards the end of the wave-guide.

REFERENCES:
patent: 3252335 (1966-05-01), Eisner
patent: 3295629 (1967-01-01), Papadakis
patent: 3834233 (1974-09-01), Willis et al.

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