Method and device for determining a fill level of liquid in a container
First Claim
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1. A method for determining a fill level of a liquid in a container comprising the steps of:
- (a) operating liquid delivery means for one of emptying and filling a measuring chamber arranged in the container to a target level at a known pressure difference between the container and the liquid delivery means, the measuring chamber extending above the maximum level of the container;
(b) determining the time required for the one of emptying and filling the measuring chamber to the target level; and
(c) converting the time determined in said step (b) into the fill level in the container.
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Abstract
During the determination of a fill level of liquid in a container, a measuring chamber, in which there is initially the same fill level as in the container, is completely filled with liquid. The time required for completely filling the measuring chamber is measured and compared with previously determined values. The fill level in the container is then determined by comparison of the measured values with the known values.
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Citations
15 Claims
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1. A method for determining a fill level of a liquid in a container comprising the steps of:
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(a) operating liquid delivery means for one of emptying and filling a measuring chamber arranged in the container to a target level at a known pressure difference between the container and the liquid delivery means, the measuring chamber extending above the maximum level of the container;
(b) determining the time required for the one of emptying and filling the measuring chamber to the target level; and
(c) converting the time determined in said step (b) into the fill level in the container. - View Dependent Claims (2, 3)
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4. A device for determining a fill level of a liquid in a container, comprising:
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a measuring chamber arranged within the container such that said measuring chamber extends above a maximum fill level of the container;
liquid delivery means for delivering said liquid, wherein said liquid delivery means is operatively connected to said measuring chamber for one of filling and emptying said measuring chamber;
a measuring device operatively arranged for determining a time interval required for said one of filling and emptying said measuring chamber to a target level; and
an evaluation unit operatively connected to said measuring device for converting said time interval determined by said measuring device to the fill level of the container. - View Dependent Claims (5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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Specification