KR20210116798A - Wave information collecting device for economic operation of ship using digital twin - Google Patents

Abstract

The present invention relates to a real-time wave information collection device for economic operation of a ship using a digital twin, capable of collecting stable and accurate wave information through a wave measurement unit through a pressure sensor even during the operation of the ship, and utilizing economic operation of the ship through wave information according to a movement path of the ship, movement information of the ship, and position information of the ship. The present invention includes a wave measuring unit; a wave information extraction unit; a storage; and a transmission unit.

Description

Wave information collection device for economic operation of ships using digital twins

The present invention relates to a device for collecting real-time wave information for economic operation of a ship using a digital twin, and to a technology for stably and accurately extracting wave information. It is about technology that can be used for economic operation.

Digital twin refers to a technology for obtaining accurate information about the characteristics of real assets by creating twins of real objects on a computer and simulating situations that may occur in real life with a computer.

Since it is possible to know the various states, productivity, and operation scenarios of real assets, it is attracting attention recently because it can improve the overall efficiency of production and services in various industries.

A digital twin is similar to a digital mockup in that it creates a clone.

However, unlike mockups, which become obsolete once the product design is complete and production and sales take place, digital twins persist after the product is complete, and the state data it collects can be made available to users of the product. have

Due to these advantages of digital twins, various processes and related technologies using digital twins are being developed throughout the industry. However, research on digital twins is still in the initial idea stage, and technology development or application for practical application to industry is insufficient.

In addition, the vessel is affected by waves and currents in the course of sailing. Current refers to a constant flow of seawater and occurs macroscopically, but waves are caused by various local causes and occur microscopically.

When a current or wave occurs in the opposite direction to the direction of the vessel's sailing, the vessel must consume enough fuel to overcome the repulsive force caused by the current and wave to drive the engine. Therefore, it is very important to control the operation of the vessel so that the current or waves do not directly oppose the direction of the vessel.

To this end, it is necessary to measure and predict currents or waves, and to efficiently select the sailing route of the vessel accordingly.

However, in the case of currents, because they occur macroscopically and have certain rules, it is easy to measure and predict, whereas waves occur microscopically in a short time and are difficult to predict.

Conventionally, a number of floating bodies and measuring systems for wave height measurement have been installed in order to measure wave height, but it is difficult to apply in the case of a ship in operation and a ship installing a wave measurement radar has a problem that the cost is high.

In addition, in order to apply simulation to a digital twin ship for efficient ship operation management, the existing wave prediction and measurement methods have low accuracy and reliability, which makes them less effective.

Therefore, it is necessary to develop a technology capable of accurately and stably extracting wave information.

As a related prior art, it is disclosed in Korean Patent Registration No. 10-0795497 (Jan. 17, 2008).

Republic of Korea Patent Registration No. 10-0795497 (2008.01.17.)

Recently, the International Maritime Organization (IMO) has tightened environmental regulations, and in particular, there is a movement to regulate carbon dioxide emissions through improvement of fuel efficiency. Also, from the point of view of the shipowner, it is economically very important to reduce the fuel consumption in the operation of the ship.

Therefore, in order to select an economical navigation route using the digital twin technology, it is necessary to accumulate wave information or information on the ship's land movement for each route. Using this accumulated information, it is possible to select an economical route using digital twin technology before the ship departs.

However, when operating a ship, it generally receives weather information in advance and operates along an economical route based on previous experience. It is not easy to find a new economic route according to maritime weather information.

It is an object of the present invention to measure accurate wave information by statistically analyzing the intensity, frequency, and period of waves measured by the wave measuring unit by providing pressure sensors on both sides of the bow of the vessel in real-time operation for economic operation of the vessel. It is to provide a wave information collection device for economic operation of a ship using a digital twin that can accurately measure waves acting on a ship without an expensive wave measuring device using radar.

A wave information collection device for economic navigation of a ship using a digital twin according to the present invention includes: a wave measuring unit provided on both sides of a bow of a ship to measure wave information; a wave information extracting unit for statistically analyzing the value measured by the wave measuring unit to extract wave information; a storage unit for storing the wave information extracted from the wave information extraction unit and the motion information and location information of the vessel measured by the motion measurement unit; and a transmission unit for transmitting wave information stored in the storage unit, motion information and location information of the vessel to the digital twin system.

Preferably, the wave measuring unit, both sides of the bow of the ship, characterized in that it comprises at least one pressure sensor respectively disposed between the waterline and the deck of the ship.

More preferably, the wave information extraction unit is characterized in that the size of the wave is measured by statistically analyzing the height or area of the wave detected through the pressure sensor.

Also preferably, the wave information extraction unit is characterized in that the intensity of the wave is measured by statistically analyzing the intensity of the pressure sensed through the pressure sensor.

Also preferably, the wave information extraction unit is characterized in that the wave period is measured by statistically analyzing the number or period of waves detected through the pressure sensor.

Also preferably, the wave information extraction unit is characterized in that the wave direction is measured by statistically analyzing the direction of waves and currents detected on the port or starboard side of the ship through the pressure sensor.

In addition, preferably, it is stored in the digital twin server so that the economic operation of the ship can be performed through the wave information transmitted in real time from the transmission unit, the motion information of the ship, and the location information, and can be retrieved when used later. do it with

According to the present invention, it is possible to measure accurate wave information by statistically analyzing the intensity, number, and period of waves measured by the wave measuring unit by providing pressure sensors on both sides of the bow of the vessel in real-time operation for economic operation of the vessel. In addition, it is possible to accurately measure waves acting on a ship without an expensive wave measuring device using radar, thereby reducing costs.

In addition, by using the accumulated information, it is possible to select an economical route by using digital twin technology before the ship departs.

1 is a diagram schematically showing a real-time wave information collection system for economic navigation of a ship using a digital twin according to an embodiment of the present invention.
2 is a side view schematically showing a wave measuring unit according to an embodiment of the present invention.
3 is a front view schematically showing a wave measuring unit according to an embodiment of the present invention.
4 is a diagram schematically illustrating a wave information collection device for manufacturing a digital twin ship according to an embodiment of the present invention.
5 is a view showing a wave information collection method for manufacturing a digital twin ship according to an embodiment of the present invention.

Hereinafter, preferred embodiments according to the present invention will be described in detail with reference to the accompanying drawings.

Advantages and features of the present invention, and a method of achieving the same, will become apparent with reference to the embodiments described below in detail in conjunction with the accompanying drawings.

However, the present invention is not limited by the embodiments disclosed below, but will be implemented in a variety of different forms, and only these embodiments allow the disclosure of the present invention to be complete, and common knowledge in the art to which the present invention pertains It is provided to fully inform those who have the scope of the invention, and the present invention is only defined by the scope of the claims.

In addition, when it is determined that related known techniques may obscure the gist of the present invention in describing the present invention, a detailed description thereof will be omitted.

1 is a diagram schematically showing a real-time wave information collection system for economic operation of a ship using a digital twin according to an embodiment of the present invention, and FIG. 2 is a diagram of a ship using a digital twin according to an embodiment of the present invention. It is a side view schematically showing a wave measuring unit for economic operation, and FIG. 3 is a front view schematically showing a wave measuring unit for economic operation of a ship using a digital twin according to an embodiment of the present invention, and FIG. 4 is an embodiment of the present invention It is a diagram schematically showing a real-time wave information collection device for economic operation of a ship using a digital twin according to an example, and FIG. 5 is real-time wave information for economic operation of a ship using a digital twin according to an embodiment of the present invention It is a drawing showing a collection method.

First, the digital twin used in the present invention is a digital object that simulates objects and environments in the real world in a virtual space, meaning that not only shapes but also movements and characteristics in the real world are expressed in the same way through data. .

Therefore, by using a digital twin, digital models and real products driven by the same physical laws as ships (figure 6 motion) can be digitized to predict the future in virtual reality.

Referring to FIG. 1 , the wave information collection system for economic navigation of a ship using a digital twin measures wave information between the waterline 1 and the deck 105 in the bow 101 of the actual ship 100 . At least one wave measuring unit 10 is disposed so that the wave measuring unit 10 may be a pressure sensor.

By sensing the impact by the waves applied to the vessel, wave information can be measured based on the pressure measured through the wave measuring unit 10, and the wave information measured by the wave measuring unit 10 is provided on the vessel. It may be transmitted to the blue information collecting device 200 .

In addition, the wave information collection device 200 is installed on the vessel to receive the 6 degree of freedom motion (surge, roll, sway, pitch, heave, yaw) information of the vessel from the motion measurement unit 150 that measures the motion of the vessel. can

The motion measurement unit 150 may be a motion reference unit (MRU).

The motion measurement unit 150 may measure the motion of the vessel according to the waves acting on the vessel during operation.

The wave information collecting device 200 may be connected to communication with the network 50 , and may transmit the motion information and wave information of the vessel to the simulation device 350 through the network 50 .

The simulation device 350 may receive the environmental external force information including the motion information and wave information of the actual vessel, and apply it to the digital twin vessel 300 through this information to proceed with the simulation.

Here, the network 50 includes an Internet network, an internal network, and the like using a TCP/IP protocol that can be connected by wire and a WAP protocol that can be accessed wirelessly.

Referring to FIGS. 2 and 3 , the wave measuring unit 10 may be disposed on both sides of the bow 101 of the actual ship 100 , and at least one or more may be disposed between the waterline 1 and the deck 105 . have.

The wave measuring unit 10 may be composed of a pressure sensor, and as in FIG. 2(a), the pressure sensor disposed on the port side is the waterline 1 according to the position between the waterline 1 and the deck 105. A first pressure sensor 11 disposed close to the deck, a third pressure sensor 13 disposed close to the deck, and a second pressure sensor 12 disposed between the first pressure sensor 11 and the third pressure sensor 13 ) can be distinguished.

In addition, the pressure sensor disposed on the starboard side as in FIG. 2(b) is a fourth pressure sensor 14 disposed close to the waterline 1 according to the position between the waterline 1 and the deck 105 and the deck. It may be divided into a sixth pressure sensor 16 disposed close and a fifth pressure sensor 15 disposed between the fourth pressure sensor 14 and the sixth pressure sensor 16 .

Illustratively, although three each are arranged on the port and starboard, it is not limited thereto, and optionally, at least one pressure sensor may be provided on each of the port and starboard of the bow.

Accordingly, wave information can be measured based on the value detected by each pressure sensor.

In addition, the pressure sensors are disposed on both sides of the bow 101, the first to third pressure sensors 11 to 13 installed on the port side, and the fourth to sixth pressure sensors 14 to 16 installed on the starboard side, respectively. The impact is sensed by the waves applied according to the Accurately measure wave information such as wave height, wave direction, and wave period by statistically analyzing , frequency, period, and wave direction (e.g., the direction of the wave measured by the pressure sensor according to the port and starboard of the bow) This indicates that blue information can be extracted.

For example, the wave direction can be measured by comparing the values measured by the port and starboard pressure sensors through the values measured by the first to third pressure sensors installed on the port side and the fourth to sixth pressure sensors installed on the starboard side. The wave height may be measured by comparing the measured values according to the positions of the first to third pressure sensors or the fourth to sixth pressure sensors.

In addition, it is possible to measure the wave period by statistically analyzing the number and period.

Therefore, accurate wave information can be extracted by measuring and analyzing the intensity, number, and period of waves detected by the pressure sensor.

Referring to FIG. 4 , the wave information collection device 200 for manufacturing a digital twin ship includes a wave measurement value receiving unit 210 , a vessel motion measurement value storage unit 220 , a wave height prediction unit 230 , and a wave It may include an information extraction unit 240 , a wave information storage unit 250 , and a conversion and transmission unit.

The wave measurement value receiving unit 210 receives the measured wave measurement value from the wave measurement unit 10, and the vessel motion measurement value storage unit 220 receives the vessel motion measurement value measured by the vessel motion measurement unit 150, Save.

The wave height prediction unit 230 may predict the wave height by using a response amplitude operator (RAO) with respect to the six degrees of freedom of the vessel.

That is, the wave height prediction unit 230 can obtain the motion response function value (RAO) of the vessel in Equation 1 below through the motion value of the vessel according to the wave height, which is the current motion value of the vessel. It can be measured through the measuring unit, and by using it inversely, the wave height can be calculated using the current motion value of the vessel and the motion response function value (RAO) of the vessel.

The wave height prediction unit 230 may calculate the wave height by dividing the motion information value (MRU) of the vessel measured by the motion measurement unit 150 by the motion response function value (RAO) of the vessel using Equation 1 below.

In addition, the wave height prediction unit 230 calculates by applying Equation 1 to predict the wave height, but a correction coefficient may be further reflected in order to accurately measure the wave height.

Equation 1

The value of the motion response function of the vessel is obtained according to the intrinsic characteristics of the vessel including the shape of the vessel and the weight distribution of the vessel, and the value of the motion response function may be different for each vessel.

The obtained motion response function value of the vessel may be stored in a memory (not shown) of the wave information collecting device 200 to be used when estimating the wave height through the wave height prediction unit 230 .

As described above, it is possible to calculate the wave height using the vessel motion value and the vessel motion response function of the motion measurement unit 150 installed in the vessel, so that the wave height can be easily predicted even during operation without a large number of floating bodies for measuring wave heights.

In addition, the wave information extraction unit 240 may extract wave information by comparing and analyzing the wave information received from the wave measurement value receiving unit 210 and the wave height prediction information received from the wave height prediction unit 230 .

More accurate wave information may be collected by comparing and analyzing the wave information measured by the wave measurement unit 10 and the wave height value predicted by the wave height prediction unit 230 .

This is because the measured value of the wave measuring unit 10 may not be accurately measured for waves higher than the height of the hull, so the predicted value of the wave height predicting unit 230 and the measured value of the wave measuring unit 10 are supplemented and corrected can be

For example, when the wave height value measured by the wave measuring unit 10 is equal to or greater than the set value, it may be corrected with the wave height value predicted by the wave height predicting unit 230 .

The blue information storage unit 250 stores the blue information extracted from the blue information extraction unit 240 ,

The wave information stored in the wave information storage unit 250 and the vessel motion information stored in the vessel motion measurement value storage unit 220 are converted by the conversion and transmission unit 260 to be applicable in the digital twin system, and the converted wave information and the vessel of motion information can be transmitted to the digital twin system.

Referring to FIG. 5 , in the method of collecting wave information for manufacturing a digital twin ship, the wave information measured by the wave measuring unit 10 is received by the wave measuring value receiving unit 210 ( S100 ).

The 6 degree of freedom motion information of the vessel measured by the motion measuring unit 150 of the vessel is received ( S110 ).

The wave height prediction unit 230 predicts the wave height through the vessel motion measurement value stored in the vessel motion measurement value storage unit 220 ( S111 ).

The wave measurement value received from the wave measurement value receiving unit 210 and the wave height prediction value received from the wave height prediction unit 230 are compared and analyzed by the wave information extraction unit 240 ( S120 ).

The wave information extraction unit 240 compares and analyzes to extract accurate wave information (S130).

The wave information extracted by the wave information extraction unit 240 is stored in the wave information storage unit 250 ( S140 ).

The wave information stored in the wave information storage unit 250 and the vessel motion information stored in the vessel motion measurement value storage unit 220 are transmitted to the digital twin system (S150).

It is stored in the digital twin server so that the economic operation of the ship can be performed through the motion information and location information of the accurate-hwan ship received from the digital twin system 350, and is loaded when used later to simulate and operate the ship. It can be used for economic operation of actual ships.

In addition, the digital twin system 350 may receive information in real time or periodically to update the digital twin vessel 300 .

The digital twin system 350 may perform simulation by adding real-time environmental external force information including the motion information of the vessel and the wave information to the digital twin vessel.

The above-described environmental external force information may refer to wind, ocean current, wave information, etc. in relation to real-time weather information.

Thereby, even when the ship is operating, the wave height acting on the ship can be predicted without a separate device using the motion response function, and the motion information of the ship and the wave acting on the ship for economic operation of the ship using the digital twin. Information can be accurately measured and collected without an expensive wave measuring device using radar, which has the effect of reducing costs.

Until now, specific embodiments of the wave information collection device for economic navigation of ships using the digital twin according to the present invention have been described, but it is obvious that various implementation modifications are possible within the limits that do not depart from the scope of the present invention. Therefore, the scope of the present invention should not be limited to the described embodiments, and should be defined by the following claims as well as the claims and equivalents.

That is, it should be understood that the above-described embodiments are illustrative in all respects and not restrictive, and the scope of the present invention is indicated by the claims to be described later rather than the detailed description, and the meaning and scope of the claims and All changes or modifications derived from the concept of equivalents thereof should be construed as being included in the scope of the present invention.

1: water line 10: wave measuring part
11: first pressure sensor 12: second pressure sensor
13: third pressure sensor 14: fourth pressure sensor
15: fifth pressure sensor 16: sixth pressure sensor
50: network 100: real ship
101: bow 102: central part
103: stern portion 105: deck
150: motion measurement unit 200: blue information collecting device
210: blue measurement value receiving unit 220: vessel motion information value storage unit
230: wave height prediction unit 240: wave information extraction unit
250: blue information storage unit 260: conversion and transmission unit
300: digital twin ship 350: digital twin system

Claims (7)

a wave measuring unit provided on both sides of the bow of the ship to measure wave information;
a wave information extracting unit for statistically analyzing the value measured by the wave measuring unit to extract wave information;
a storage unit for storing the wave information extracted from the wave information extraction unit and the motion information and location information of the vessel measured by the motion measurement unit; and
Wave information collection device for economic operation of a ship using a digital twin, characterized in that it comprises a transmission unit for transmitting the wave information stored in the storage unit and the motion information and location information of the vessel to the digital twin system.
The method according to claim 1,
The blue measurement unit,
Wave information collection device for economic navigation of a ship using a digital twin, characterized in that it includes at least one pressure sensor disposed between the waterline and the deck of the ship, respectively, on both sides of the bow of the ship.
3. The method according to claim 2,
The blue information extraction unit,
Wave information collection device for economic operation of a ship using a digital twin, characterized in that the size of the wave is measured by statistically analyzing the height or area of the wave detected through the pressure sensor.
3. The method according to claim 2,
The blue information extraction unit,
Wave information collection device for economic operation of a ship using a digital twin, characterized in that the intensity of the wave is measured by statistically analyzing the intensity of the pressure sensed through the pressure sensor.
3. The method according to claim 2,
The blue information extraction unit,
Wave information collection device for economic operation of a ship using a digital twin, characterized in that the wave period is measured by statistically analyzing the number or period of waves detected through the pressure sensor.
3. The method according to claim 2,
The blue information extraction unit,
Wave information collection device for economic navigation of a ship using a digital twin, characterized in that the wave direction is measured by statistically analyzing the direction of waves and currents detected on the port or starboard side of the ship through the pressure sensor.
The method according to claim 1,
A digital twin characterized in that it is stored in the digital twin server so that the ship can economically operate through the wave information transmitted in real time from the transmission unit, the movement information of the ship, and the location information, and can be retrieved when used later. A wave information collection device for economic navigation of ships.

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