Method and arrangement for indirectly determining fill characteristics of a fluid tank on a marine vessel
First Claim
1. A method for accommodating indirect ascertainment of fill-characteristics of fluid tanks on marine vessels, the method comprising the steps of:
- providing an experientially-based mapping of volume characteristics of a fluid tank positioned on a marine vessel correlated with respect to measurable fluid surface positions within the fluid tank;
outputting fluid fill condition information for operator use based on quantification of a parameter other than sensed fluid level in the fluid tank based on a function of that other parameter being compared to the experientially-based mapping of volume;
calibrating the accuracy of the output of fluid fill condition information by occasional adjustment of the map of volume characteristics versus measured fluid surface position; and
assuring accuracy of the calibration by limiting execution of the calibration process to only when at least one of the following conditions is occurring;
(a) the vessel is at a standstill, (b) the attitude of the vessel is substantially constant, and (c) fluid in the fluid tank is substantially static.
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Accused Products
Abstract
Method and arrangement for accommodating indirect ascertainment of fill-characteristics of fluid tanks on marine vessels. The invention includes providing an experientially-based mapping of volume characteristics of a fluid tank positioned on a marine vessel that are correlated with respect to measurable fluid surface positions within the fluid tank. In consideration of this volume characteristic mapping, fluid fill condition information is output for operator use based on quantification of a parameter other than sensed fluid level in the fluid tank. While it is contemplated that the other parameter may be any characteristic that readily reads back to the volume characteristic mapping, it is particularly advantageous, and a preferred embodiment of the invention, that the other parameter be a volumetric quantification of fluid consumed out of the tank that can be compared to an earlier ascertained tank volume.
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Citations
37 Claims
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1. A method for accommodating indirect ascertainment of fill-characteristics of fluid tanks on marine vessels, the method comprising the steps of:
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providing an experientially-based mapping of volume characteristics of a fluid tank positioned on a marine vessel correlated with respect to measurable fluid surface positions within the fluid tank; outputting fluid fill condition information for operator use based on quantification of a parameter other than sensed fluid level in the fluid tank based on a function of that other parameter being compared to the experientially-based mapping of volume; calibrating the accuracy of the output of fluid fill condition information by occasional adjustment of the map of volume characteristics versus measured fluid surface position; and assuring accuracy of the calibration by limiting execution of the calibration process to only when at least one of the following conditions is occurring;
(a) the vessel is at a standstill, (b) the attitude of the vessel is substantially constant, and (c) fluid in the fluid tank is substantially static. - View Dependent Claims (2, 3, 4, 5)
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6. A method for accommodating indirect ascertainment of fill-characteristics of fluid tanks on marine vessels, the method comprising the steps of:
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mapping volume characteristics, that have been obtained oil an experiential basis, of a fluid tank positioned on a marine vessel; and outputting fluid fill condition information for operator use based on quantification of a parameter other than sensed fluid level in the fluid tank based on a function of that other parameter being compared to the experientially-based mapping of volume; calibrating the accuracy of the output of fluid fill condition information by occasional adjustment of the map of volume characteristics versus measured fluid surface position; and assuring accuracy of the calibration by limiting execution of the calibration process to only when at least one of the following conditions is occurring;
(a) the vessel is at a standstill, (b) the attitude of the vessel is substantially constant, and (c) fluid in the fluid tank is substantially static. - View Dependent Claims (7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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18. A calibrating liquid-level measurement arrangement for a marine vessel comprising:
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a liquid storage tank positioned on a marine vessel; a liquid surface position sensing device in communication with a processor and adapted to provide position-indicating data regarding a sensed position of a liquid surface in said liquid storage tank to said processor; an operator input to said processor adapted to accept quantitative information regarding liquid amounts added to said liquid storage tank; a liquid withdrawal arrangement in fluid communication with said liquid storage tank, said liquid withdrawal arrangement having a capability for measuring a volumetric amount of liquid withdrawn from said liquid storage tank via said liquid withdrawal arrangement; and said processor adapted to compare the sensed position of the liquid surface in said liquid storage tank with the measured volumetric amount withdrawn from said tank thereby enabling correlation between an amount of liquid stored in said liquid storage tank and a corresponding sensed position by said liquid surface position sensing device. - View Dependent Claims (37)
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19. A method for calibrating a liquid-level measurement arrangement for a marine vessel comprising:
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sensing an initial position of a liquid surface in a marine vessel'"'"'s liquid storage tank that is at least partially filled with an amount of liquid; measuring an amount of liquid withdrawn from said liquid storage tank and sensing a subsequent position of the liquid surface in said liquid storage tank thereby enabling an assignment of the volume of liquid stored in said liquid storage tank defined between said initial and subsequent positions, execution of said step of sensing a subsequent position of the liquid surface being limit to only when at least one of the following conditions is occurring;
(a) the vessel is at a standstill, (b) the attitude of the vessel is substantially constant, and (c) fluid in the fluid tank is substantially static; andrepeating a series of such sensing and measuring steps thereby enabling a mapping of stored liquid volume inside said liquid storage tank with respect to an axis defined by a series of detectable liquid top surface position quantifying an amount of liquid added to a liquid storage tank positioned on a marine vessel; and correlating said quantified amount of liquid added to said liquid storage tank with a map-derived amount using sensed positions of the liquid surface in said liquid storage tank before and after the addition of said quantified amount of liquid. - View Dependent Claims (20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36)
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Specification