Measuring and testing – Liquid level or depth gauge
Patent
1988-12-13
1990-05-15
Yasich, Daniel M.
Measuring and testing
Liquid level or depth gauge
73292, 73447, 367908, 374102, 374142, G01F 2328, G01K 1122
Patent
active
049247000
ABSTRACT:
The invention relates to apparatus for measuring storage parameters such as level and temperature relating to immiscible liquids or fluids in a tank. The apparatus comprises a pulse generator (1) for generating pulses which are applied to a delay line (3) with reflected pulses being representative of the depths of the various liquids constituting propagation transitions through different media (I, II, III, IV, etc.). Logic means (Li) are switched on by a measurement pulse (Im) and they are switched off by corresponding reflected pulses (Ii) generated by transitions of order i. Integrator means (Ji) for integrating the signals delivered by the logic means (Li) serve to generate respective voltages proportional to the time lapse between the measurement pulse (Im) and each of the reflected pulses (Ii) under consideration. Multiplexer means serve to sequentially deliver the measured values corresponding to the different liquids of order i in the tank. The apparatus is suitable for surveillance and management of hydrocarbon tanks.
REFERENCES:
patent: 4404514 (1983-09-01), Reichert, Jr.
patent: 4409832 (1983-10-01), Kongedic et al.
patent: 4499417 (1985-02-01), Wright et al.
patent: 4805453 (1989-02-01), Haynes
Whessoe. S.A.
Yasich Daniel M.
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