Liquid level indicator for storage tank

Details Liquid level indicator for storage tank Liquid level indicator for storage tank

1997-07-24

1999-05-04

Gutierrez, Diego F. F.

Measuring and testing

Liquid level or depth gauge

73319, 733225, 340624, G01F 2328

Patent

active

059005467

ABSTRACT:
A railroad tank car containing liquid, has a tube through its top, with the closed lower end of the tube in the liquid. A float slidable along the tube exterior is magnetically coupled to an ultrasound reflector piston inside the tube so that, when the tube is in the liquid in the tank, the float determines the height of the piston inside the tube. An ultrasonic transducer atop the tube sends pulses down the tube and which are reflected by the piston to the transducer. A computer coupled to the transducer determines and displays the liquid level. The piston is cup-shaped with a known distance between reflecting surfaces for use in the computer to produce a display value corrected for temperature variations.

REFERENCES:
patent: 4063457 (1977-12-01), Zekulin et al.
patent: 4815323 (1989-03-01), Ellinger et al.
patent: 4984449 (1991-01-01), Caldwell
patent: 5054319 (1991-10-01), Fling
patent: 5076101 (1991-12-01), Lazure
patent: 5095748 (1992-03-01), Gregory et al.
patent: 5127266 (1992-07-01), Maresca et al.
patent: 5131271 (1992-07-01), Haynes et al.
patent: 5319973 (1994-06-01), Crayton et al.

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