Methods and systems for providing sloshing alerts and advisories
First Claim
1. A method for providing an alert when the motion of a ship indicates a potential of sloshing damage from liquid cargo being transported by the ship, said method comprising:
- calculating, with a processing device, a natural period for the liquid cargo held in a tank based on received user inputs relating to a configuration of the tank and a fill percentage of the tank;
receiving, at the processing device, data describing actual motion of the ship with respect to three orthogonal axes;
calculating, with the processing device, a plurality of periods in a time sequence defined by the actual motion of the ship;
determining, with the processing device, a proximity of the natural period of the liquid cargo held in the tank to the plurality of periods in the time sequence defined by the actual motion of the ship; and
providing an alert to a user if at least a predetermined plurality of the plurality of periods in the time sequence are each within a threshold proximity of the natural period of the liquid cargo held in the tank.
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Accused Products
Abstract
A method is described for providing an alert when the motion of a ship indicates a potential of sloshing damage from liquid cargo being transported by the ship. The method includes calculating, with a processing device, a natural period for the tanks holding the liquid cargo based on the configuration and fill levels of the tanks, receiving, at the processing device, data describing the actual or predicted motion of the ship with respect to three orthogonal axes, determining, with the processing device, a proximity of the natural period of the tanks to a period defined by the actual or predicted motion of the ship, and providing an alert to a user if the proximity in periods is within a threshold value.
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Citations
22 Claims
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1. A method for providing an alert when the motion of a ship indicates a potential of sloshing damage from liquid cargo being transported by the ship, said method comprising:
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calculating, with a processing device, a natural period for the liquid cargo held in a tank based on received user inputs relating to a configuration of the tank and a fill percentage of the tank; receiving, at the processing device, data describing actual motion of the ship with respect to three orthogonal axes; calculating, with the processing device, a plurality of periods in a time sequence defined by the actual motion of the ship; determining, with the processing device, a proximity of the natural period of the liquid cargo held in the tank to the plurality of periods in the time sequence defined by the actual motion of the ship; and providing an alert to a user if at least a predetermined plurality of the plurality of periods in the time sequence are each within a threshold proximity of the natural period of the liquid cargo held in the tank. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A sloshing alert and advisory system for a ship operable to transport a liquid cargo, said system comprising:
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a processing device; a user interface communicatively coupled to said processing device; memory communicatively coupled to said processing device, said memory comprising data defining a natural period of the liquid cargo held in a tank within the ship; and a ship motion sensor communicatively coupled to said processing device and operable to provide data describing a plurality of periods in a time sequence defined by the actual motion of the ship with respect to three orthogonal axes, said processing device programmed to determine a proximity of the natural period of the liquid cargo held in the tank within the ship to the plurality of periods in the time sequence defined by the actual motion of the ship, and to provide an alert via said user interface when at least a predetermined plurality of the plurality of periods in the time sequence are each within a threshold proximity of the natural period of the liquid cargo held in the tank within the ship indicative that actual ship motions are approaching conditions that potentially lead to excessive sloshing of the liquid cargo. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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19. A non-transitory computer-readable medium for providing an alert when the motion of a ship indicates a potential of sloshing damage from liquid cargo being transported by the ship, wherein the non-transitory computer-readable medium includes computer-executable instructions embodied thereon, wherein when executed by at least one processor, the computer-executable instructions cause the at least one processor to:
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determine, based on data related to the configuration of each of a plurality of tanks containing the liquid cargo and a fill percentage for each of the plurality of tanks, as input by at least one of a user and a sensor, a natural period of the liquid cargo within each of the plurality of tanks; determine, a plurality of periods in a time sequence defined by the actual motion of the ship with respect to three orthogonal axes based on data received from a ship motion sensor; determine a proximity of the natural period of the liquid cargo within each of the plurality of tanks to the plurality of periods in the time sequence defined by the actual motion of the ship; and provide an alert via a user interface communicatively coupled to the at least one processor when at least a predetermined plurality of the plurality of periods in the time sequence are each within a threshold proximity of the natural period of the liquid cargo within each of the plurality of tanks such that actual ship motions are approaching conditions that can lead to excessive sloshing of the liquid cargo. - View Dependent Claims (20, 21, 22)
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Specification