Measuring and testing – Liquid level or depth gauge
Patent
1988-03-15
1989-06-20
Cuchlinski, Jr., William A.
Measuring and testing
Liquid level or depth gauge
73290R, 73149, 141 83, G01F 2314
Patent
active
048400645
ABSTRACT:
An apparatus (9) is disclosed for determining the volume of liquid (18) in a container (1) which is being provided with an in flow and an out flow of liquid such that there normally remains an ullage volume (8) in the container filled with gas. A timer (13) actuated valve (11) is provided for interrupting one of the in flow and the out flow of liquid. A pressure sensor (10) detects the pressure of the gas in the ullage volume (8) of the container (1) during the interruption of the one of the in flow and out flow of the liquid, and a microprocessor (14) calculates the volume of liquid (18) in the container (1) from the detected change in pressure of the gas during the interruption. The apparatus and associated method are particularly advantageous for determining the volume of liquid in a liquid reservoir of an integrated drive generator of an aircraft engine since the determination of the liquid volume can be accomplished with the reservoir of irregular shape in various attitudes, at various temperatures and under conditions of acceleration and minimal additional weight being added to the aircraft.
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Cuchlinski Jr. William A.
Hohenshell Jeffrey J.
Sundstrand Corp.
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