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Methods and systems for providing sloshing alerts and advisories

  • US 8,643,509 B1
  • Filed: 01/31/2011
  • Issued: 02/04/2014
  • Est. Priority Date: 01/31/2011
  • Status: Active Grant
First Claim
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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:

  • 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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