System and method for estimating drift path of marine floating body

Patent metadata

Field	Value
Publication number	US-12504285-B2
Application number	US-202318193435-A
Country	US
Kind code	B2
Filing date	Mar 30, 2023
Priority date	Apr 5, 2022
Publication date	Dec 23, 2025
Grant date	Dec 23, 2025

Abstract

A system and method for estimating a drift path of a marine floating body may achieve a quick and accurate search and contribute to minimizing damage because the system and method can consider both left drift and right drift with respect to a wind direction. The system and method may simulate drift (Leeway) of a marine floating body with respect wind in consideration of both of a Downwind Component of Leeway (DWL) and a Crosswind Component of Leeway (CWL) using Monte Carlo technique, and by creating signs (+/−) by applying a uniform random number to the CWL. The system and method may more accurately estimate a path with a relatively simple configuration and at a relatively low cost.

First claim

What is claimed is:

1 . A system for estimating a drift path of a marine floating body and searching the marine floating body based on an estimated drift path, the system comprising:
a data collector comprising one or more sensors configured to collect various data for estimating a drift path of a marine floating body, the drift path of the marine floating body configured to change over time by influence of wind; a drift path estimator configured to estimate a drift path of the marine floating body in two directions to a left and a right on the basis of the data collected by the data collector; an output unit comprising a display device configured to output various items of information including an estimation result by the drift path estimator and a processing process and a processing result of an entire system; and a controller configured to control operations of the entire system by:
controlling the output unit to display the estimated drift path of the marine floating body using an electronic map system such that the estimated drift path shows left and right drift paths of the marine floating body from a last known position of the marine floating body on the electronic map system,
causing the estimated drift path to be transmitted to an external device, and
controlling the electronic map system to identify a location of the marine floating body such that the marine floating body is searched based on the identified location on the electronic map system.

2 . The apparatus of claim 1 , wherein the data collector is configured to: receive various data, which include information about the marine floating body including a size, weight, and a kind of the marine floating body and environment information including a current, a wind direction, and a wind velocity at a drift area, through a specific input unit, or receive various data through wired or wireless communication from the outside and then store the data in a database.

3 . The apparatus of claim 1 , wherein the drift path estimator is configured to estimate the left drift path and the right drift path of the marine floating body with respect to a wind direction by simulating drift (Leeway) of the marine floating body with respect to wind using a simulation technique including a Monte Carlo algorithm, by applying both of a Downwind Component of Leeway (DWL) and a Crosswind Component of Leeway (CWL) in this case, and by creating signs (+/−) by applying a uniform random number to the CWL.

4 . The apparatus of claim 3 , wherein the drift path estimator is configured to estimate the left drift path and the right drift path of the marine floating body with respect to a wind direction using a following equation,
Leeway( L )=DWL±CWL
DWL=α×Gaussian Random Number× W
CWL=β×Gaussian Random Number×Sign(+/−)× W
(where DWL is a Downwind Component of Leeway, CWL is a Crosswind Component of Leeway, W is a wind velocity, and α and β are constants that are determined through drift tests on the sea), and wherein the Sign (+/−) is configured be determined as “−” when the Gaussian random number is less than a predetermined reference value, and determined as “+” when the Gaussian random number is the predetermined reference value or more.

5 . The apparatus of claim 1 , wherein the electronic map system comprises at least one of a map using pre-stored map information, or in cooperation with an electronic navigation chart system on a ship or an external map information system.

6 . The apparatus of claim 1 , wherein the external device comprises at least one of a user terminal or a server.

7 . A method of estimating a drift path of a marine floating body, the method comprising:
collecting, by a data collector comprising one or more sensors, various data for estimating a drift path of a marine floating body, the drift path of the marine floating body configured to change over time by influence of wind; estimating, by a drift path estimator, a drift path of the marine floating body in two directions to a left and a right on the basis of the data collected by the data collector; outputting, by an output unit comprising a display device, various items of information including an estimation result by the drift path estimator and a processing process and a processing result of an entire system; controlling, by a controller, the output unit to display the estimated drift path of the marine floating body using an electronic map system such that the estimated drift path shows left and right drift paths of the marine floating body from a last known position of the marine floating body on the electronic map system; causing, by the controller, the estimated drift path to be transmitted to an external device; and controlling, by the controller, the electronic map system to identify a location of the marine floating body such that the marine floating body is searched based on the identified location on the electronic map system.

8 . A system for tracking a marine floating body to estimate and track a drift path of a marine floating body, the system comprising:
a plurality of drift path estimation systems each installed on a ship or at an area and configured to estimate and monitor a drift path of a floating body on the sea in accordance with predetermined setting or an external control signal; a control server configured to construct big data about a marine floating body and a drift path by receiving and storing various data from the drift path estimation systems in accordance with the predetermined setting and provide various items of corresponding information in a customer-fit type in accordance with a request from a user; and a plurality of user terminals configured to transmit and receive various data by communicating with the drift path estimation systems, respectively, and the control server so that each user checks information about a drift path of a floating body and requests and receives desired information, wherein the drift path estimation systems are configured to transmit various data, which are obtained by estimating and monitoring a drift path of a marine floating body at respective positions, to the control server using the system for estimating a drift path of a marine floating body and searching the marine floating body based on an estimated drift path, the system comprising: a data collector comprising one or more sensors configured to collect various data for estimating a drift path of a marine floating body, the drift path of the marine floating body configured to change over time by influence of wind; a drift path estimator configured to estimate a drift path of the marine floating body in two directions to a left and a right on the basis of the data collected by the data collector; an output unit comprising a display device configured to output various items of information including an estimation result by the drift path estimator and a processing process and a processing result of an entire system; and a controller configured to control operations of the entire system by: controlling the output unit to display the estimated drift path of the marine floating body using an electronic map system such that the estimated drift path shows left and right drift paths of the marine floating body from a last known position of the marine floating body on the electronic map system, causing the estimated drift path to be transmitted to an external device, and controlling the electronic map system to identify a location of the marine floating body such that the marine floating body is searched based on the identified location on the electronic map system.

9 . The system of claim 8 , wherein each of the user terminals is configured by installing an exclusive

Assignees

• Korea Inst Ocean Sci & Tech

Inventors

• Lee Moonjin
• Kim Yong Myung
• Kim Tae Sung

Classifications

• G06F7/58

  Random or pseudo-random number generators · CPC title

• G06F2113/08

  Fluids · CPC title

• G06Q50/26

  Government or public services (business processes related to the transportation industry G06Q50/40) · CPC title

• G01W1/02

  Instruments for indicating weather conditions by measuring two or more variables, e.g. humidity, pressure, temperature, cloud cover or wind speed (G01W1/10 takes precedence) · CPC title

• G01C13/006

  horizontal movement · CPC title