System and method for arrangement and recovery of ocean bottom node

Abstract

A system and a method for arrangement and recovery of an ocean bottom node are disclosed. The system for arrangement and recovery of an ocean bottom node, according to the present invention, comprises: an ocean bottom node (OBN) disposed on the seabed; a movement path prediction device for predicting a movement path along which the OBN moves from the sea surface to the ocean bottom in response to a marine area in which the OBN is disposed; and a drop point calculation device for setting a seabed point at which the OBN for the marine area is disposed, and calculating a drop point of the OBN on the sea surface corresponding to the set seabed point on the basis of the movement path predicted by the movement path prediction device.

Description

Seabed node deployment and recovery system, and deployment and recovery method thereof

[0001] The present invention relates to a system for deploying and retrieving ocean bottom nodes, and a method for deploying and retrieving the same, and more particularly, to a system for deploying and retrieving ocean bottom nodes, and a method for deploying and retrieving the same, which enables deploying at least one ocean bottom node (OBN: OCEAN BOTTOM NODES) for ocean exploration at a desired ocean bottom exploration location at a minimum cost and enabling easy and accurate retrieval of the ocean bottom node upon completion of ocean bottom exploration from the ocean bottom.

[0002] Seismic exploration of the ocean floor is a very useful method for understanding the geological strata of the ocean floor, and has developed significantly since its use in oil and gas exploration.

[0003] Typically, ocean seismic exploration uses a sound source device such as an air gun to generate sound waves underwater, and the signals that are reflected from the seafloor's stratum boundaries are received at regular intervals by a streamer cable with a built-in hydrophone, and the received data is computerized to produce a seismic image, thereby identifying the structure of the ocean's stratum.

[0004] In particular, recently, in order to obtain more precise and accurate data for seabed exploration, ocean bottom cable (OBC) exploration is used, which can obtain high-coverage 2D and 3D P-wave and S-wave images by directly installing streamers equipped with geophones at regular intervals on the seabed, and ocean bottom node exploration is used, which independently collects signals through multiple ocean bottom nodes (OBNs) installed on the seabed at various locations, and then retrieves and analyzes each ocean bottom node after a certain period of time.

[0005] Meanwhile, seafloor exploration using seafloor nodes places tens to hundreds of seafloor nodes at set locations on the seafloor, and compiles data independently explored by each seafloor node to determine the structure of the seafloor strata in the marine area.

[0006] However, in order to place seabed nodes in multiple set seabed locations, seabed exploration using such seabed nodes involves dropping seabed nodes from the sea surface corresponding to each set seabed location, or directly transporting each seabed node and placing it in the set seabed location.

[0007] However, the general method of dropping seabed nodes on the sea surface has the problem of obtaining incorrect exploration data because it is difficult to place the seabed nodes at each set seabed location due to the direction and speed of the ocean currents in the relevant ocean area.

[0008] In addition, the method of directly transporting each seabed node and placing it at a set seabed location generally has the problem that the manpower and equipment required to transport tens to hundreds of such seabed nodes to each set seabed location are enormous, and the time required to place the seabed nodes is also considerable, resulting in a decrease in the efficiency of placing the seabed nodes.

[0009] In addition, in order to recover a seabed node placed on the seabed, equipment and manpower for recovering the seabed node must be deployed to the seabed, so there is a problem that the cost for recovering the seabed node is also enormous.

[0010] The present invention was created to solve the above-mentioned problems, and the purpose of the present invention is to provide an ocean bottom node placement and recovery system and a placement and recovery method thereof, which allows a user to place at least one ocean bottom node (OBN) for ocean exploration at a desired ocean bottom exploration location at a minimum cost and easily and accurately retrieve the ocean bottom node after completing ocean bottom exploration from the ocean bottom.

[0011] In addition, the present invention aims to provide a seabed node placement device and a placement method thereof, which can reduce the manpower and equipment required for placement of seabed nodes and the time required for placement by setting a location where a seabed node is to be placed on the seabed of a marine area and simply placing the seabed node in the set location by simply dropping it from the sea surface.

[0012] In addition, the present invention aims to provide a seabed node recovery device and a recovery method thereof, which enable the seabed node to be recovered stably and quickly without loss by floating a seabed node placed on the seabed of a marine area and predicting where the floating seabed node will float on the sea surface of the marine area.

[0013] In order to achieve the above-described object, an ocean bottom node deployment and recovery system according to one aspect of the present invention comprises: an ocean bottom node (OBN) deployed on the ocean floor; a movement path prediction device that predicts a movement path of the OBN from the sea surface to the sea floor in response to an ocean area where the OBN is deployed; and a drop point calculation device that sets an ocean bottom point where the OBN is deployed for the ocean area and calculates a drop point of the OBN at the sea surface corresponding to the set ocean bottom point based on the movement path predicted by the movement path prediction device.

[0014] The above-described seabed node deployment / recovery system may further include a buoyancy device installed on the OBN and buoying the OBN deployed on the seabed to the sea surface in response to a signal from the sea.

[0015] In addition, the above-described seabed node deployment / recovery system may further include a surfacing path prediction device that predicts a surfacing path of the OBN surfacing from the seabed point where the OBN is deployed to the sea surface; and a recovery point calculation device that calculates a recovery point of the OBN surfacing to the sea surface based on the surfacing path predicted by the surfacing path prediction device.

[0016] In order to achieve the above-described object, a seabed node deployment / recovery method according to one aspect of the present invention is characterized by comprising the steps of: a step of predicting a movement path of an OBN from the sea surface to the seabed corresponding to a marine area where the OBN is deployed; a step of setting a seabed point where the OBN is deployed in the marine area and storing the set seabed point; and a step of calculating a release point of the OBN at the sea surface corresponding to the set seabed point based on the predicted movement path.

[0017] The above-described seabed node placement / recovery method may further include a step of driving a buoyancy device installed on the OBN to float the OBN to the sea surface.

[0018] The above-described seabed node placement / recovery method may further include a step of predicting a rising path of the OBN rising from the seabed point where the OBN is placed to the sea surface; and a step of calculating a recovery point of the OBN rising to the sea surface based on the predicted rising path.

[0019] In order to achieve the above-described object, an ocean bottom node placement device according to one aspect of the present invention comprises: an ocean information collection unit that collects ocean information including a depth from the sea surface to the sea floor in an ocean area where an OBN (Ocean Bottom Node) is to be placed, a change in the direction of ocean currents according to a change in the depth from the sea surface to the sea floor, and a change in the speed of ocean currents; a mass measurement unit that measures the mass of the OBN; and a movement path prediction unit that predicts a movement path along which the OBN moves from the sea surface to the sea floor based on the collected ocean information and the measured mass; and based on the predicted movement path, the OBN is dropped from the sea surface and placed on the sea floor.

[0020] The above-described submarine node placement device may further include a submarine point setting unit that sets a submarine point where the OBN is placed.

[0021] The above-described seabed node placement device may further include a parallel movement control unit that controls the parallel movement in the forward, backward, left, and right directions of the predicted movement path; and a drop point calculation unit that calculates the drop point of the OBN at the sea surface based on the starting point of the movement path when the destination point of the movement path matches the set seabed point.

[0022] In order to achieve the above-described object, a method for deploying a seabed node according to one aspect of the present invention comprises the steps of: collecting ocean information including the mass of an OBN, the depth from the sea surface to the seabed in an ocean area where the OBN is to be deployed, a change in the direction of the ocean current from the sea surface to the seabed, and a change in the speed of the ocean current; predicting a movement path along which the OBN moves from the sea surface to the seabed based on the collected ocean information and the measured mass; and releasing the OBN from the sea surface based on the predicted movement path.

[0023] The above-described method for arranging seabed nodes may further include a step of setting a seabed point where the OBN is to be deployed.

[0024] The above-described seabed node placement method may further include a step of controlling parallel movement in the forward, backward, left, and right directions of the predicted movement path; and a step of calculating the OBN's release point at the sea surface based on the starting point of the movement path when the arrival point of the movement path matches the set seabed point.

[0025] In order to achieve the above-described object, an ocean bottom node recovery device according to one aspect of the present invention comprises: an ocean information collection unit that collects ocean information including a depth from the sea surface to the seabed, a change in the direction of ocean current from the sea surface to the seabed, and a change in the speed of the ocean current for an ocean area where an OBN (Ocean Bottom Node) is deployed; a mass information storage unit that stores mass information including the mass of the OBN; a surfacing path prediction unit that predicts a surfacing path when the OBN surfacing from the seabed to the sea surface based on the collected ocean information and the stored mass information; and a recovery point prediction unit that predicts a recovery point of the OBN surfacing to the sea surface based on the predicted surfacing path.

[0026] The above-described seabed node recovery device may further include a seabed point storage unit that stores the seabed point where the OBN is placed.

[0027] The above-described seabed node recovery device may further include a buoyancy device driving unit that transmits a driving signal to the buoyancy device installed in the OBN to drive the buoyancy device.

[0028] According to one aspect of the present invention for achieving the above-described object, a seabed node recovery method performed by a seabed node recovery device may include a step of collecting ocean information including a mass of an OBN, a depth from the sea surface to the seabed for a marine area where the OBN is deployed, a change in the direction of the ocean current from the sea surface to the seabed, and a change in the speed of the ocean current; a step of predicting a rising path when the OBN rises from the seabed to the sea surface based on the collected ocean information and the stored mass information; and a step of predicting a recovery point of the OBN that has risen to the sea surface based on the predicted rising path.

[0029] The above-described method for recovering a seabed node may further include a step of storing a seabed point where the OBN is placed.

[0030] The above-described seabed node recovery method may further include a step of transmitting a driving signal to a floating device installed in the OBN to drive the floating device.

[0031] According to the present invention, at least one ocean bottom node (OBN) for ocean exploration can be placed at a desired ocean bottom exploration location by a user at a minimum cost, and the ocean bottom node that has completed ocean bottom exploration can be easily and accurately retrieved from the ocean bottom.

[0032] In addition, according to the present invention, the location where the seafloor node is to be placed on the seafloor of a marine area is set, and the seafloor node is placed at the set location simply by dropping it from the sea surface, thereby reducing the manpower and equipment required for placing the seafloor node, and the time required for placing the node.

[0033] In addition, according to the present invention, by floating a seabed node placed on the seabed of a marine area and predicting where the floating seabed node will float on the sea surface of the marine area, it is possible to recover the seabed node stably and quickly without loss.

[0034] FIG. 1 is a schematic diagram illustrating the configuration of a seabed node placement / recovery system according to one embodiment of the present invention.

[0035] Figure 2 is a drawing showing an example of a floating device installed on a seabed node.

[0036] Figure 3 is a schematic drawing showing the configuration of the injury device of Figure 2.

[0037] Figure 4 is a diagram showing an example of predicting the movement path of a seabed node using a marine area model designed to correspond to a marine area.

[0038] Figure 5 is a drawing illustrating an example of parallel movement along a movement path.

[0039] Figure 6 is a drawing illustrating an example of calculating the drop point of a seabed node by reflecting the movement path of Figure 5 on coordinates projected onto the sea surface.

[0040] Figure 7 is a drawing illustrating an example of raising a seabed node placed on the seabed.

[0041] Figure 8 is a diagram showing an example of the movement path and surfacing path of a seabed node.

[0042] Figure 9 is a diagram showing an example of predicting the rising path of a seabed node using a marine area model designed to correspond to a marine area.

[0043] Figure 10 is a flowchart illustrating a method for placing / recovering seabed nodes according to an embodiment of the present invention.

[0044] Figure 11 is a schematic drawing of a seabed node placement device according to an embodiment of the present invention.

[0045] Figure 12 is a flowchart illustrating a method for arranging seabed nodes according to an embodiment of the present invention.

[0046] Figure 13 is a schematic drawing of a seabed node recovery device according to an embodiment of the present invention.

[0047] Figure 14 is a flowchart illustrating a method for recovering a seabed node according to an embodiment of the present invention.

[0048] Hereinafter, some embodiments of the present invention will be described with reference to exemplary drawings. When designating components in each drawing, identical components will be designated with the same reference numerals, wherever possible, even if they appear in different drawings. Furthermore, when describing embodiments of the present invention, detailed descriptions of related known structures or functions will be omitted if they are deemed to hinder understanding of the embodiments of the present invention.

[0049] Additionally, terms such as first, second, A, B, (a), (b), etc. may be used to describe components of embodiments of the present invention. These terms are only intended to distinguish the components from other components, and the nature, order, or sequence of the components are not limited by the terms. When it is described that a component is "connected," "coupled," or "connected" to another component, it should be understood that the component may be directly connected, coupled, or connected to the other component, but another component may also be "connected," "coupled," or "connected" between the component and the other component.

[0050] FIG. 1 is a schematic diagram illustrating the configuration of a seabed node placement / recovery system according to one embodiment of the present invention.

[0051] Referring to FIG. 1, an ocean bottom node deployment / recovery system (100) according to an embodiment of the present invention may include an ocean bottom node (OBN: Ocean Bottom Node) (110), a movement path prediction device (120), a drop point calculation device (130), a flotation device (140), a flotation path prediction device (150), and a recovery point calculation device (160).

[0052] The seabed node (110) is deployed on the seabed. At this time, tens to hundreds of seabed nodes (110) are deployed at each set seabed location, and perform multi-component exploration of the marine area. In addition, each seabed node (110) deployed on the seabed has its own location preset for the corresponding marine area. The multi-component exploration method of the marine area using multiple seabed nodes (110) can utilize known technologies, and a detailed description thereof is omitted here.

[0053] Meanwhile, a floating device (140) may be installed on the seabed node (110) as shown in FIG. 2. Here, the floating device (140) is a device for floating the seabed node (110) installed on the seabed to the sea surface in order to recover it again, and a gas cartridge (141), a rubber tube (142), a communicator (143), a motor (144), an inflator (145), and a battery (146) may be installed inside the device as shown in FIG. 3.

[0054] The movement path prediction device (120) stores the set seafloor position of the seafloor node (110) corresponding to the marine area where the seafloor node (110) is deployed, and predicts the movement path that the seafloor node (110) takes when it falls freely from the sea surface to the seafloor when the seafloor node (110) is dropped on the sea surface. At this time, since the movement path prediction device (120) knows the depth from the sea surface to the seafloor in the marine area, the weight of the seafloor node (110), and the weight of the flotation device (140), it can predict the movement path of the seafloor node (110) during the time from the time the seafloor node (110) is dropped from the sea surface to the time it reaches the seafloor.

[0055] In this case, in marine areas, the direction and speed of the ocean current may vary depending on depth, and accordingly, the seabed node (110) may reach a different location from the point where it was released at the sea surface. In this case, the direction and speed of the ocean current, which change depending on depth, are most influenced by the topographical characteristics of the marine area.

[0056] As illustrated in FIG. 4, the movement path prediction device (120) designs a marine area model that reflects the topographic characteristics of the marine area where the seabed node (110) is placed, and drops a seabed node model reduced in the same ratio as the scaled-down model of the marine area model onto the sea surface to track the movement path in the process of reaching the seabed, thereby being able to predict the movement path of the seabed node (110) moving from the sea surface to the seabed in an actual marine area.

[0057] At this time, the average current direction and current speed in the marine area may vary depending on the latitude and longitude location. Therefore, the movement path prediction device (120) reflects the average current direction and current speed corresponding to the latitude and longitude location of the marine area in the marine area model, and by tracking the movement path of the seabed node model moving from the sea surface to the seabed in the marine area model, the movement path of the seabed node (110) moving from the sea surface to the seabed in an actual marine area can be predicted.

[0058] In addition, the direction and speed of the current according to the depth of the ocean area may vary depending on the season and the high or low tide. Therefore, the movement path prediction device (120) reflects the change in the direction and speed of the current according to the season, high or low tide in the actual ocean area (the change in the direction and speed of the current according to the change in time) in the ocean area model, and by tracking the movement path of the seabed node model moving from the sea surface to the sea floor in the ocean area model, the movement path of the seabed node (110) moving from the sea surface to the sea floor in a specific season and at a specific time in the actual ocean area can be predicted.

[0059] In addition, when the same weight of seabed nodes (110) are dropped into different ocean regions with the same terrain and depth, if the salinity concentration of each ocean region differs by more than a set range, the time it takes for the seabed nodes (110) to reach the seabed in each ocean region may be different, and as a result, the movement path of the seabed nodes (110) in each ocean region may be different.

[0060] Accordingly, the movement path prediction device (120) can predict the movement path of the seabed node (110) from the sea surface to the seabed for the actual corresponding area by reflecting the salinity concentration of the actual marine area into the marine area model and tracking the movement path of the seabed node model moving from the sea surface to the seabed.

[0061] Additionally, the seabed node (110) may encounter currents from various directions as it falls from the sea surface to the seabed. In this case, depending on its shape, the seabed node (110) may be greatly pushed by small current velocities, while it may also be pushed less by larger current velocities.

[0062] In an embodiment of the present invention, in order to minimize the influence according to the shape of the seabed node (110), it is assumed that the seabed node (110) is implemented in a cylindrical shape and is designed to move from the sea surface to the seabed in a vertically erected state. In this case, the movement path prediction device (120) can predict the movement path of the seabed node (110) from the sea surface to the seabed by minimizing the difference according to the shape of the seabed node (110) with respect to ocean currents colliding from various directions.

[0063] The drop point calculation device (130) sets the seafloor point where the seafloor node (110) is placed for the marine area, and calculates the drop point of the seafloor node (110) at the sea surface corresponding to the set seafloor point based on the movement path predicted by the movement path prediction device (120).

[0064] At this time, the drop point calculation device (130) can calculate the drop point of the seabed node (110) at the sea surface corresponding to the set seabed point by moving the movement path of the seabed node (110) predicted by the movement path prediction device (120) in a parallel forward / backward or left / right direction.

[0065] For example, if the movement path tracked from the seabed area model by the movement path prediction device (120) is as shown in FIG. 5, the drop point calculation device (130) can move the arrival point of the movement path tracked from the seabed area model to match the set point set as the location of the seabed where the seabed node (110) is placed.

[0066] In addition, the launching point calculation device (130) projects the coordinates of the seabed where the set point where the seabed node (110) is placed onto the sea surface, as illustrated in FIG. 6, and calculates the point where the projected coordinates meet the starting point of the movement path, thereby calculating the launching point of the seabed node (110) on the sea surface. At this time, the launching point of the seabed node (110) calculated based on the seabed area model is reflected in the actual seabed area according to the reduction ratio of the seabed area model, thereby calculating the launching point of the seabed node (110) in the ocean area.

[0067] Accordingly, the seabed node placement / recovery system (100) according to the embodiment of the present invention places the seabed node (110) at a drop point of the sea surface calculated as a drop point corresponding to the set point where the seabed node (110) is placed, thereby placing the seabed node (110) at the set seabed point.

[0068] Meanwhile, the seabed node placement / recovery system (100) according to an embodiment of the present invention can transmit a buoyancy signal to a buoyancy device (140) installed in the seabed node (110) when it is desired to recover a seabed node (110) placed on the seabed.

[0069] In this case, the communication device (143) of the injury device (140) receives the injury signal and drives the inflator (145) in response.

[0070] The inflator (145) supplies compressed gas within the gas cartridge (141) to the rubber tube (142), and the rubber tube (142) expands as shown in Fig. 7 according to the supply of gas, thereby raising the seabed node (110) placed on the seabed to the sea surface.

[0071] At this time, the rising path of the seabed node (110) rising from the seabed is different from the movement path of the seabed node (110) moving from the sea surface to the seabed, as shown in FIG. 8.

[0072] The injury path prediction device (150) predicts the injury path from the seabed point where the seabed node is placed (i.e., the set point) to the sea surface.

[0073] At this time, the surfacing path prediction device (150) reflects the average ocean current direction and ocean current speed corresponding to the latitude and longitude of the ocean region to the ocean region model, as shown in FIG. 9, similar to the movement path predicted by the movement path prediction device (120), and by tracking the surfacing path in which the seabed node model rises from the seabed to the sea surface in the ocean region model, the surfacing path in which the seabed node (110) rises from the seabed to the sea surface in an actual ocean region can be predicted.

[0074] In addition, the direction and speed of the current according to the depth of the ocean area may vary depending on the season and the high or low tide. Therefore, the surfacing path prediction device (150), like the movement path prediction device (120), reflects the change in the direction and speed of the current according to the season, high or low tide in an actual ocean area (the change in the direction and speed of the current according to the change in time) in the ocean area model, and by tracking the surfacing path of the seabed node model surfacing from the seabed to the sea surface in the ocean area model, it is possible to predict the surfacing path of the seabed node (110) surfacing from the seabed to the sea surface in a specific season and at a specific time in an actual ocean area.

[0075] In addition, when floating seabed nodes (110) of the same weight on the seabed of different ocean regions with the same topography and depth, if the salinity concentration of each ocean region differs by more than a set range, the time taken for the seabed nodes (110) to rise from the seabed to the sea surface in each ocean region may be different, and as a result, the floating path of the seabed nodes (110) in each ocean region may be different.

[0076] Accordingly, the surfacing path prediction device (150) can predict the surfacing path of the seabed node model (110) from the seabed to the sea surface for the actual corresponding area by reflecting the salinity concentration of the actual marine area into the marine area model and tracking the surfacing path of the seabed node model surfacing from the seabed to the sea surface.

[0077] The recovery point calculation device (160) calculates the recovery point of a seabed node (110) floating on the sea surface based on the floating path predicted by the floating path prediction device (150).

[0078] At this time, the recovery point calculation device (160) projects the coordinates of the seabed where the set point where the seabed node (110) is placed onto the sea surface, and calculates the point where the projected coordinates meet the arrival point of the floating path, thereby calculating the recovery point on the sea surface of the seabed node (110) floating from the seabed.

[0079] Here, since the set point of the seabed node (110) is known, the recovery point of the seabed node (110) calculated based on the seabed area model is reflected in the actual seabed area according to the reduction ratio of the seabed area model, and the difference is calculated, thereby calculating the recovery point of the seabed node (110) for the sea level in the ocean area.

[0080] Although the seabed node placement / recovery system (100) according to the embodiment of the present invention is illustrated and described as having a movement path prediction device (120) and a drop point calculation device (130) configured separately, the movement path prediction device (120) and the drop point calculation device (130) may be implemented as an integrated unit.

[0081] Likewise, although the seabed node placement / recovery system (100) is illustrated and described as having a wound path prediction device (150) and a recovery point calculation device (160) configured separately, the wound path prediction device (150) and the recovery point calculation device (160) may be implemented as an integrated unit.

[0082] Fig. 10 is a flowchart illustrating a method for deploying / recovering a seabed node according to an embodiment of the present invention. The method for deploying / recovering a seabed node according to an embodiment of the present invention can be performed by the seabed node deployment / recovery system (100) illustrated in Fig. 1.

[0083] Referring to FIGS. 1 to 10, seabed nodes (110) are positioned on the seabed. At this time, tens to hundreds of seabed nodes (110) are positioned at each set seabed location, and perform multi-component exploration of the marine area. In addition, each seabed node (110) positioned on the seabed has its location preset for the corresponding marine area (S101). A multi-component exploration method of the marine area using multiple seabed nodes (110) can utilize known technologies, and a detailed description thereof is omitted here.

[0084] Meanwhile, a floating device (140) may be installed in the seabed node (110). Here, the floating device (140) is a device for floating the seabed node (110) installed on the seabed to the sea surface in order to recover it again, and a gas cartridge (141), a rubber tube (142), a communicator (143), a motor (144), an inflator (145), and a battery (146) may be installed inside the device.

[0085] The movement path prediction device (120) stores the set seafloor position of the seafloor node (110) corresponding to the marine area where the seafloor node (110) is deployed, and predicts the movement path that the seafloor node (110) takes when it falls freely from the sea surface to the seafloor when the seafloor node (110) is dropped on the sea surface (S103). At this time, since the movement path prediction device (120) knows the depth from the sea surface to the seafloor in the marine area, the weight of the seafloor node (110), and the weight of the flotation device (140), it can predict the movement path of the seafloor node (110) during the time from the time the seafloor node (110) is dropped from the sea surface to the time it reaches the seafloor.

[0086] In this case, in marine areas, the direction and speed of the ocean current may vary depending on depth, and accordingly, the seabed node (110) may reach a different location from the point where it was released at the sea surface. In this case, the direction and speed of the ocean current, which change depending on depth, are most influenced by the topographical characteristics of the marine area.

[0087] A movement path prediction device (120) designs a marine area model that reflects the topographical characteristics of the marine area where the seabed node (110) is placed, and drops a seabed node model reduced in the same ratio as the scaled-down model of the marine area model onto the sea surface to track the movement path of the process of reaching the seabed, thereby being able to predict the movement path of the seabed node (110) moving from the sea surface to the seabed in an actual marine area.

[0088] At this time, the average current direction and current speed in the marine area may vary depending on the latitude and longitude location. Therefore, the movement path prediction device (120) reflects the average current direction and current speed corresponding to the latitude and longitude location of the marine area in the marine area model, and by tracking the movement path of the seabed node model moving from the sea surface to the seabed in the marine area model, the movement path of the seabed node (110) moving from the sea surface to the seabed in an actual marine area can be predicted.

[0089] In addition, the direction and speed of the current according to the depth of the ocean area may vary depending on the season and the high or low tide. Therefore, the movement path prediction device (120) reflects the change in the direction and speed of the current according to the season, high or low tide in the actual ocean area (the change in the direction and speed of the current according to the change in time) in the ocean area model, and by tracking the movement path of the seabed node model moving from the sea surface to the sea floor in the ocean area model, the movement path of the seabed node (110) moving from the sea surface to the sea floor in a specific season and at a specific time in the actual ocean area can be predicted.

[0090] In addition, when the same weight of seabed nodes (110) are dropped into different ocean regions with the same terrain and depth, if the salinity concentration of each ocean region differs by more than a set range, the time it takes for the seabed nodes (110) to reach the seabed in each ocean region may be different, and as a result, the movement path of the seabed nodes (110) in each ocean region may be different.

[0091] Accordingly, the movement path prediction device (120) can predict the movement path of the seabed node (110) from the sea surface to the seabed for the actual corresponding area by reflecting the salinity concentration of the actual marine area into the marine area model and tracking the movement path of the seabed node model moving from the sea surface to the seabed.

[0092] Additionally, the seabed node (110) may encounter currents from various directions as it falls from the sea surface to the seabed. In this case, depending on its shape, the seabed node (110) may be greatly pushed by small current velocities, while it may also be pushed less by larger current velocities.

[0093] In an embodiment of the present invention, in order to minimize the influence according to the shape of the seabed node (110), it is assumed that the seabed node (110) is implemented in a cylindrical shape and is designed to move from the sea surface to the seabed in a vertically erected state. In this case, the movement path prediction device (120) can predict the movement path of the seabed node (110) from the sea surface to the seabed by minimizing the difference according to the shape of the seabed node (110) with respect to ocean currents colliding from various directions.

[0094] The launch point calculation device (130) sets the seafloor point where the seafloor node (110) is placed for the marine area, and calculates the launch point of the seafloor node (110) at the sea surface corresponding to the set seafloor point based on the movement path predicted by the movement path prediction device (120) (S105).

[0095] At this time, the drop point calculation device (130) can calculate the drop point of the seabed node (110) at the sea surface corresponding to the set seabed point by moving the movement path of the seabed node (110) predicted by the movement path prediction device (120) in a parallel forward / backward or left / right direction.

[0096] For example, if the movement path tracked from the seabed area model by the movement path prediction device (120) is as shown in FIG. 5, the drop point calculation device (130) can move the arrival point of the movement path tracked from the seabed area model to match the set point set as the location of the seabed where the seabed node (110) is placed.

[0097] In addition, the launching point calculation device (130) projects the coordinates of the seabed where the set point where the seabed node (110) is placed onto the sea surface, and calculates the point where the projected coordinates meet the starting point of the movement path, thereby calculating the launching point of the seabed node (110) on the sea surface. At this time, the launching point of the seabed node (110) calculated based on the seabed area model is reflected in the actual seabed area according to the reduction ratio of the seabed area model, thereby calculating the launching point of the seabed node (110) in the ocean area.

[0098] Accordingly, the seabed node placement / recovery system (100) according to the embodiment of the present invention places the seabed node (110) at a drop point of the sea surface calculated as a drop point corresponding to the set point where the seabed node (110) is placed, thereby placing the seabed node (110) at the set seabed point.

[0099] The buoyancy path prediction device (150) predicts the buoyancy path from the seabed point where the seabed node is placed (i.e., the set point) to the sea surface (S107).

[0100] At this time, the seabed node placement / recovery system (100) according to the embodiment of the present invention can transmit a buoyancy signal to the buoyancy device (140) installed in the seabed node (110).

[0101] In this case, the communication device (143) of the injury device (140) receives the injury signal and drives the inflator (145) in response.

[0102] The inflator (145) supplies compressed gas within the gas cartridge (141) to the rubber tube (142), and the rubber tube (142) expands according to the supply of gas to float the seabed node (110) placed on the seabed to the sea surface (S109).

[0103] At this time, the rising path of the seabed node (110) rising from the seabed is different from the movement path of the seabed node (110) moving from the sea surface to the seabed.

[0104] At this time, the surfacing path prediction device (150) reflects the average ocean current direction and ocean current speed corresponding to the latitude and longitude of the ocean region to the ocean region model, as shown in FIG. 9, similar to the movement path predicted by the movement path prediction device (120), and by tracking the surfacing path in which the seabed node model rises from the seabed to the sea surface in the ocean region model, the surfacing path in which the seabed node (110) rises from the seabed to the sea surface in an actual ocean region can be predicted.

[0105] In addition, the direction and speed of the current according to the depth of the ocean area may vary depending on the season and the high or low tide. Therefore, the surfacing path prediction device (150), like the movement path prediction device (120), reflects the change in the direction and speed of the current according to the season, high or low tide in an actual ocean area (the change in the direction and speed of the current according to the change in time) in the ocean area model, and by tracking the surfacing path of the seabed node model surfacing from the seabed to the sea surface in the ocean area model, it is possible to predict the surfacing path of the seabed node (110) surfacing from the seabed to the sea surface in a specific season and at a specific time in an actual ocean area.

[0106] In addition, when floating seabed nodes (110) of the same weight on the seabed of different ocean regions with the same topography and depth, if the salinity concentration of each ocean region differs by more than a set range, the time taken for the seabed nodes (110) to rise from the seabed to the sea surface in each ocean region may be different, and as a result, the floating path of the seabed nodes (110) in each ocean region may be different.

[0107] Accordingly, the surfacing path prediction device (150) can predict the surfacing path of the seabed node model (110) from the seabed to the sea surface for the actual corresponding area by reflecting the salinity concentration of the actual marine area into the marine area model and tracking the surfacing path of the seabed node model surfacing from the seabed to the sea surface.

[0108] The recovery point calculation device (160) calculates the recovery point of the seabed node (110) floating on the sea surface based on the floating path predicted by the floating path prediction device (150) (S111).

[0109] At this time, the recovery point calculation device (160) projects the coordinates of the seabed where the set point where the seabed node (110) is placed onto the sea surface, and calculates the point where the projected coordinates meet the arrival point of the floating path, thereby calculating the recovery point on the sea surface of the seabed node (110) floating from the seabed.

[0110] Here, since the set point of the seabed node (110) is known, the recovery point of the seabed node (110) calculated based on the seabed area model is reflected in the actual seabed area according to the reduction ratio of the seabed area model, and the difference is calculated, thereby calculating the recovery point of the seabed node (110) for the sea level in the ocean area.

[0111] Although the seabed node placement / recovery system (100) according to the embodiment of the present invention is illustrated and described as having a movement path prediction device (120) and a drop point calculation device (130) configured separately, the movement path prediction device (120) and the drop point calculation device (130) may be implemented as an integrated unit.

[0112] Likewise, although the seabed node placement / recovery system (100) is illustrated and described as having a wound path prediction device (150) and a recovery point calculation device (160) configured separately, the wound path prediction device (150) and the recovery point calculation device (160) may be implemented as an integrated unit.

[0113] Fig. 11 is a schematic diagram of a seabed node placement device (200) according to an embodiment of the present invention. The seabed node placement device (200) according to an embodiment of the present invention can be implemented in an integrated form with the movement path prediction device (120) and the drop point calculation device (130) of the seabed node placement / retrieval system (100) shown in Fig. 1.

[0114] Referring to FIG. 11, a seabed node placement device (200) according to an embodiment of the present invention may include an ocean information collection unit (202), a mass measurement unit (204), a movement path prediction unit (206), a seabed point setting unit (208), a parallel movement control unit (210), and a drop point calculation unit (212).

[0115] The marine information collection unit (202) collects marine information including changes in the direction of ocean currents and changes in the speed of ocean currents according to changes in the depth from the sea surface to the seabed, the depth from the sea surface to the seabed, and the depth of the seabed node (110) in the marine area where the seabed node (110) is to be placed.

[0116] At this time, since the ocean area may have different ocean current direction and speed depending on the latitude and longitude, the ocean information collection unit (202) can collect ocean information including the latitude and longitude location information of the ocean area where the seabed node (110) is placed, and the average ocean current direction and speed corresponding to the location information.

[0117] Additionally, the direction and speed of ocean currents may vary depending on the depth of the ocean area, depending on the topographical information, such as islands, reefs, and underwater hills located within the set range. Accordingly, the ocean information collection unit (202) can collect ocean information, including topographical information, regarding the ocean area where the seabed node (110) will be placed.

[0118] Additionally, the direction and speed of ocean currents according to the depth of the ocean area may vary depending on the season and the high or low tide. Accordingly, the ocean information collection unit (202) may collect information on the actual season in the ocean area, information on high or low tide over time, and changes in the direction and speed of ocean currents corresponding to high or low tides (changes in the direction and speed of ocean currents over time) as ocean information.

[0119] In addition, when seabed nodes (110) of the same weight are dropped into different ocean regions with the same terrain and depth, if the salinity concentration of each ocean region differs by more than a set range, the time it takes for the seabed nodes (110) to reach the seabed in each ocean region may differ. Accordingly, the ocean information collection unit (202) may collect the salinity concentration of the ocean region where the seabed nodes (110) are deployed as ocean information.

[0120] The mass measuring unit (204) measures the mass of the seabed node (110). At this time, when a buoyancy device (140) is installed on the seabed node (110), it is preferable that the mass measuring unit (204) measure a mass including the mass of the seabed node (110) and the mass of the buoyancy device (140).

[0121] The movement path prediction unit (206) predicts the movement path of the seabed node (110) from the sea surface to the seabed based on the marine information collected by the marine information collection unit (202) and the mass measured by the mass measurement unit (204). At this time, as illustrated in FIG. 4, the movement path prediction unit (206) reflects the topography, location, depth, ocean current direction and speed according to depth, salinity concentration, and the degree of high or low tide according to time in the ocean area model corresponding to the ocean area, and repeatedly projects the seabed node model from the sea surface of the ocean area model, thereby predicting the movement path of the seabed node (110) moving from the sea surface to the seabed in the ocean area. In addition, the movement path prediction unit (206) can predict the movement path of the seabed node (110) moving from the sea surface to the seabed in the corresponding marine area by repeatedly dropping the seabed node model in the marine area model a set number of times or more and taking the average value for each movement path.

[0122] The seabed node placement device (200) according to an embodiment of the present invention can place a seabed node (110) on the seabed by dropping it from the sea surface of a marine area based on a movement path predicted by a movement path prediction unit (206).

[0123] The seabed point setting unit (208) sets the seabed point where the seabed node (110) is placed among the marine areas where the seabed nodes (110) are placed. That is, tens to hundreds of seabed nodes (110) are placed on the seabed of the marine area, and at this time, the seabed point setting unit (208) sets the seabed point corresponding to each seabed node (110).

[0124] The parallel movement control unit (210) controls the parallel movement in the forward, backward, left, and right directions of the movement path predicted by the movement path prediction unit (206). At this time, the parallel movement control unit (210) can control the parallel movement in the forward, backward, left, and right directions of the movement path so that the arrival point of the movement path obtained through the ocean area model matches the seafloor point set by the seafloor point setting unit (208), as illustrated in FIG. 5.

[0125] The drop point calculation unit (212) calculates the drop point of the seabed node (110) at the sea surface based on the starting point of the movement path when the arrival point of the movement path controlled by the parallel movement control unit (210) matches the set seabed point.

[0126] At this time, the drop point calculation unit (212) projects the coordinates of the seabed where the set point where the seabed node (110) is placed onto the sea surface, as shown in FIG. 6, and calculates the point where the projected coordinates meet the starting point of the movement path, thereby calculating the drop point of the seabed node (110) on the sea surface of the seabed area model.

[0127] In addition, the drop point calculation unit (212) can calculate the drop point of the seabed node (110) in the ocean area by reflecting the drop point of the seabed node (110) calculated based on the seabed area model to the actual seabed area according to the reduction ratio of the seabed area model.

[0128] Accordingly, the seabed node placement device (200) according to the embodiment of the present invention can place the seabed node (110) at the set seabed point through free fall by dropping the seabed node (110) at the sea surface drop point calculated as the drop point corresponding to the set point where the seabed node (110) is placed.

[0129] Fig. 12 is a flowchart illustrating a sea surface node arrangement method according to an embodiment of the present invention. The sea surface node arrangement method according to an embodiment of the present invention can be performed by the sea surface node arrangement device (200) illustrated in Fig. 11.

[0130] Referring to FIGS. 11 and 12, the sea surface node placement device (200) collects marine information including the depth from the sea surface to the seabed in the marine area where the sea surface node (110) is to be placed, the change in the direction of the ocean current according to the change in the depth from the sea surface to the seabed, and the change in the speed of the ocean current (S201).

[0131] At this time, since the ocean area may have different ocean current direction and ocean current speed depending on the latitude and longitude location, the sea surface node placement device (200) can collect ocean information including the latitude and longitude location information of the ocean area where the seabed node (110) is placed, and the average ocean current direction and ocean current speed corresponding to the location information.

[0132] Additionally, the direction and speed of ocean currents may vary depending on the depth of the ocean area, depending on the topographical information such as islands, reefs, and underwater hills located within the set range. Accordingly, the sea surface node placement device (200) can collect ocean information including topographical information regarding the ocean area where the sea floor node (110) will be placed.

[0133] Additionally, the direction and speed of ocean currents according to the depth of the ocean area may vary depending on the season and the high or low tide. Accordingly, the sea surface node placement device (200) may collect information on the actual season in the ocean area, the high or low tide over time, and changes in the direction and speed of ocean currents corresponding to the high or low tide (changes in the direction and speed of ocean currents over time) as ocean information.

[0134] In addition, when seabed nodes (110) of the same weight are dropped into different ocean regions with the same terrain and depth, if the salinity concentration of each ocean region differs by more than a set range, the time it takes for the seabed node (110) to reach the seabed in each ocean region may differ. Accordingly, the seabed node placement device (200) may collect the salinity concentration of the ocean region where the seabed node (110) is placed as ocean information.

[0135] The sea surface node placement device (200) measures the mass of the sea floor node (110). At this time, when a flotation device (140) is installed on the sea floor node (110), it is preferable that the sea surface node placement device (200) measure a mass including the mass of the sea floor node (110) and the mass of the flotation device (140).

[0136] The sea surface node placement device (200) sets the seafloor point where the seafloor node (110) is placed among the marine areas where the seafloor node (110) is placed. That is, tens to hundreds of seafloor nodes (110) are placed on the seafloor of the marine area, and at this time, the sea surface node placement device (200) sets the seafloor point corresponding to each seafloor node (110) (S203).

[0137] The sea surface node placement device (200) predicts the movement path of the sea surface node (110) from the sea surface to the sea floor based on the ocean information collected by the ocean information collection unit (202) and the mass measured by the mass measurement unit (204) (S205).

[0138] At this time, as illustrated in FIG. 4, the sea surface node placement device (200) reflects the topography, location, depth, direction and speed of ocean currents according to depth, salinity concentration, and degree of high or low tide according to time in the ocean area model corresponding to the ocean area, and by repeatedly dropping the seabed node model from the sea surface of the ocean area model, the seabed node (110) can predict the movement path that it takes to move from the sea surface to the seabed in the ocean area.

[0139] In addition, the sea surface node placement device (200) can predict the movement path of the sea surface node (110) from the sea surface to the sea floor in the corresponding sea area by repeatedly dropping the sea floor node model in the ocean area model a set number of times or more and taking the average value for each movement path.

[0140] The sea surface node placement device (200) controls the parallel movement of the predicted movement path in the forward, backward, left, and right directions (S207). At this time, the sea surface node placement device (200) can control the parallel movement of the movement path in the forward, backward, left, and right directions so that the destination point of the movement path obtained through the ocean area model matches the set seabed point, as illustrated in FIG. 5.

[0141] When the arrival point of the movement path matches the set seabed point, the seabed node placement device (200) calculates the drop point of the seabed node (110) at the sea surface based on the starting point of the movement path (S209).

[0142] At this time, the sea surface node placement device (200) projects the coordinates of the sea surface where the set point where the sea surface node (110) is placed onto the sea surface, as shown in FIG. 6, and calculates the point where the projected coordinates meet the starting point of the movement path, thereby calculating the drop point of the sea surface node (110) on the sea surface of the sea floor area model.

[0143] In addition, the seabed node placement device (200) can calculate the drop point of the seabed node (110) in the ocean area by reflecting the drop point of the seabed node (110) calculated based on the seabed area model to the actual seabed area according to the reduction ratio of the seabed area model.

[0144] The seabed node placement device (200) according to an embodiment of the present invention places a seabed node (110) on the seabed by dropping it from the sea surface of a marine area based on a movement path predicted by a movement path prediction unit (206) (S211).

[0145] Accordingly, the seabed node placement device (200) according to the embodiment of the present invention can place the seabed node (110) at the set seabed point through free fall by dropping the seabed node (110) at the sea surface drop point calculated as the drop point corresponding to the set point where the seabed node (110) is placed.

[0146] Fig. 13 is a schematic diagram of a seabed node recovery device according to an embodiment of the present invention. The recovery surface node recovery device (300) according to an embodiment of the present invention can be implemented in an integrated form by integrating the surfacing path prediction device (150) and recovery point calculation device (160) of the seabed node placement / recovery system (100) shown in Fig. 1.

[0147] Referring to FIG. 13, a recovery surface node recovery device (300) according to an embodiment of the present invention may include an ocean information collection unit (302), a mass information storage unit (304), a flotation path prediction unit (306), a recovery point prediction unit (308), a seabed point storage unit (310), and a flotation device driving unit (312).

[0148] The marine information collection unit (302) collects marine information including the depth from the sea surface to the seabed, changes in the direction of the ocean current from the sea surface to the seabed, and changes in the speed of the ocean current for the marine area where the submarine point node (110) is deployed.

[0149] At this time, since the ocean area may have different ocean current direction and ocean current speed depending on the latitude and longitude location, the ocean information collection unit (302) can collect ocean information including the latitude and longitude location information of the ocean area where the seabed node (110) is placed, and the average ocean current direction and ocean current speed corresponding to the location information.

[0150] Additionally, the direction and speed of ocean currents may vary depending on the depth of the ocean area, depending on the topographical information, such as islands, reefs, and underwater hills located within the set range. Accordingly, the ocean information collection unit (302) can collect ocean information, including topographical information, regarding the ocean area where the seafloor node (110) will be placed.

[0151] Additionally, the direction and speed of ocean currents according to the depth of the ocean area may vary depending on the season and the high or low tide. Accordingly, the ocean information collection unit (302) may collect information on the actual season in the ocean area, information on high or low tide over time, and changes in the direction and speed of ocean currents corresponding to high or low tides (changes in the direction and speed of ocean currents over time) as ocean information.

[0152] In addition, when seabed nodes (110) of the same weight are dropped into different ocean regions with the same terrain and depth, if the salinity concentration of each ocean region differs by more than a set range, the time it takes for the seabed nodes (110) to reach the seabed in each ocean region may differ. Accordingly, the ocean information collection unit (302) may collect the salinity concentration of the ocean region where the seabed nodes (110) are deployed as ocean information.

[0153] Here, the marine information collection unit (302) may receive and store marine information collected by the marine information collection unit (202) of the seabed node placement device (200).

[0154] The mass measurement unit (304) stores the mass information of the seabed node (110). At this time, when a buoyancy device (140) is installed in the seabed node (110), it is preferable that the mass information storage unit (304) store a mass including the mass of the seabed node (110) and the mass of the buoyancy device (140).

[0155] The injury path prediction unit (306) predicts the injury path when the seabed node (110) rises from the seabed to the sea surface based on the ocean information collected by the ocean information collection unit (302) and the mass information stored in the mass information storage unit (304).

[0156] At this time, as illustrated in FIG. 9, the surfacing path prediction unit (306) reflects the topography, location, depth, direction and speed of ocean currents according to depth, salinity concentration, and degree of high or low tide according to time in the ocean region model corresponding to the ocean region, and by repeatedly surfacing the seabed node model from the seabed of the ocean region model to the sea surface, the surfacing path of the seabed node (110) surfacing from the seabed to the sea surface in the ocean region can be predicted.

[0157] In addition, the injury path prediction unit (306) can predict the injury path along which the seabed node (110) moves from the seabed to the sea surface in the corresponding marine area by repeatedly inflating the seabed node model in the marine area model a set number of times or more and taking the average value for each injury path.

[0158] The recovery point prediction unit (308) predicts the recovery point of the seabed node (110) that has risen to the sea surface based on the recovery path predicted by the recovery path prediction unit (306).

[0159] At this time, the recovery point prediction unit (308) projects the coordinates of the seabed where the set point where the seabed node (110) is placed onto the sea surface, and calculates the point where the arrival point of the floating path departing from the set point meets the projected coordinates, thereby calculating the recovery point on the sea surface of the seabed node (110) floating from the seabed.

[0160] Here, since the set point of the seabed node (110) is known, the recovery point of the seabed node (110) calculated based on the seabed area model is reflected in the actual seabed area according to the reduction ratio of the seabed area model, and the difference is calculated, thereby calculating the recovery point of the seabed node (110) for the sea level in the ocean area.

[0161] The seabed point storage unit (310) stores the seabed points of the marine area where the seabed node (110) is deployed. At this time, the seabed point storage unit (310) can receive and store the seabed point of the seabed node (110) set from the seabed point setting unit (208) of the seabed node deployment device (200).

[0162] The buoyancy device drive unit (312) transmits a drive signal to the buoyancy device (140) installed on the seabed node (110) to drive the buoyancy device (140). At this time, as shown in Fig. 3, the buoyancy device (140) may be equipped with a gas cartridge (141), a rubber tube (142), a communicator (143), a motor (144), an inflator (145), and a battery (146), and floats to the sea surface by the drive signal.

[0163] Fig. 14 is a flowchart illustrating a method for recovering a seabed node according to an embodiment of the present invention. The method for recovering a seabed node according to an embodiment of the present invention can be performed by the seabed node recovery device (300) illustrated in Fig. 13.

[0164] Referring to FIGS. 13 and 14, the seabed node recovery device (300) collects marine information including the depth from the sea surface to the seabed, the change in the direction of the ocean current from the sea surface to the seabed, and the change in the speed of the ocean current for the marine area where the seabed point node (110) is placed (S301).

[0165] At this time, since the ocean area may have different ocean current direction and speed depending on the latitude and longitude, the seabed node recovery device (300) can collect ocean information including the latitude and longitude location information of the ocean area where the seabed node (110) is placed, and the average ocean current direction and speed corresponding to the location information.

[0166] Additionally, the direction and speed of ocean currents may vary depending on the depth of the ocean area, depending on the topographical information such as islands, reefs, and underwater hills located within the set range. Accordingly, the seabed node recovery device (300) can collect ocean information, including topographical information, regarding the ocean area where the seabed node (110) will be deployed.

[0167] Additionally, the direction and speed of ocean currents at different depths in an ocean area may vary depending on the season and the ebb or flow of the tide. Accordingly, the seabed node recovery device (300) can collect information on actual seasons in an ocean area, information on high or low tides over time, and changes in the direction and speed of ocean currents corresponding to high or low tides (changes in the direction and speed of ocean currents over time) as ocean information.

[0168] In addition, when seabed nodes (110) of the same weight are dropped into different ocean regions with the same terrain and depth, if the salinity concentration of each ocean region differs by more than a set range, the time it takes for the seabed node (110) to reach the seabed in each ocean region may differ. Accordingly, the seabed node recovery device (300) may also collect the salinity concentration of the ocean region where the seabed node (110) is deployed as oceanographic information.

[0169] In addition, the seabed node recovery device (300) can store mass information of the seabed node (110). At this time, when a flotation device (140) is installed in the seabed node (110), it is preferable that the mass information storage unit (304) store mass including the mass of the seabed node (110) and the mass of the flotation device (140).

[0170] Here, the seabed node recovery device (300) can also receive and store ocean information collected by the seabed node placement device (200).

[0171] The seabed node recovery device (300) stores the seabed points of the marine area where the seabed node (110) is deployed (S303). At this time, the seabed node recovery device (300) can receive and store the seabed points of the seabed node (110) set from the seabed node deployment device (200).

[0172] The seabed node recovery device (300) transmits a driving signal to the buoyancy device (140) installed in the seabed node (110) to drive the buoyancy device (140) (S305). At this time, as shown in Fig. 3, the buoyancy device (140) may be equipped with a gas cartridge (141), a rubber tube (142), a communication device (143), a motor (144), an inflator (145), and a battery (146), and floats to the sea surface by the driving signal.

[0173] The seabed node recovery device (300) predicts the buoyancy path of the seabed node (110) when it floats from the seabed to the sea surface based on the collected ocean information and stored mass information (S307).

[0174] At this time, the seabed node recovery device (300) reflects the topography, location, depth, direction and speed of ocean currents according to depth, salinity concentration, and degree of high or low tide according to time, etc. of the ocean region in the ocean region model corresponding to the ocean region, as illustrated in FIG. 9, and by repeatedly surfacing the seabed node model from the seabed of the corresponding ocean region model to the sea surface, the surfacing path of the seabed node (110) surfacing from the seabed to the sea surface in the corresponding ocean region can be predicted.

[0175] In addition, the seabed node recovery device (300) can predict the floating path along which the seabed node (110) moves from the seabed to the sea surface in the corresponding sea area by repeatedly floating the seabed node model more than a set number of times in the marine area model and taking the average value for each floating path.

[0176] The seabed node recovery device (300) predicts the recovery point of the seabed node (110) that has risen to the sea surface based on the predicted buoyancy path (S309).

[0177] At this time, the seabed node recovery device (300) projects the coordinates of the seabed where the set point where the seabed node (110) is placed onto the sea surface, and calculates the point where the arrival point of the floating path departing from the set point meets the projected coordinates, thereby calculating the recovery point on the sea surface of the seabed node (110) floating from the seabed.

[0178] Here, since the set point of the seabed node (110) is known, the recovery point of the seabed node (110) calculated based on the seabed area model is reflected in the actual seabed area according to the reduction ratio of the seabed area model, and the difference is calculated, thereby calculating the recovery point of the seabed node (110) for the sea level in the ocean area.

[0179] While the embodiments of the present invention have been described above, they are merely exemplary, and those skilled in the art will understand that various modifications and equivalent embodiments are possible. Therefore, the scope of protection of the present invention should be defined not only by the following claims but also by their equivalents.

[0180] According to the present invention, at least one ocean bottom node (OBN) for ocean exploration can be placed at a desired ocean bottom exploration location by a user at a minimum cost, and the ocean bottom node that has completed ocean bottom exploration can be easily and accurately retrieved from the ocean bottom.

[0181] In addition, according to the present invention, the location where the seafloor node is to be placed on the seafloor of a marine area is set, and the seafloor node is placed at the set location simply by dropping it from the sea surface, thereby reducing the manpower and equipment required for placing the seafloor node, and the time required for placing the node.

[0182] In addition, according to the present invention, by floating a seabed node placed on the seabed of a marine area and predicting where the floating seabed node will float on the sea surface of the marine area, it is possible to recover the seabed node stably and quickly without loss.

Claims

1. OBN (Ocean Bottom Node) deployed on the seabed; A movement path prediction device that predicts the movement path of the OBN from the sea surface to the sea floor in response to the marine area where the OBN is deployed; and A launching point calculation device that sets a seabed point where the OBN is deployed for the above-mentioned marine area, and calculates a launching point of the OBN at sea level corresponding to the set seabed point based on a movement path predicted by the movement path prediction device; A seabed node placement / retrieval system characterized by including:

2. In paragraph 1, A floating device installed on the above OBN and floating the OBN placed on the seabed to the sea surface in response to a signal from the sea; A seabed node deployment / retrieval system characterized by further including:

3. In paragraph 2, A floating path prediction device that predicts the floating path of the OBN floating from the seabed point where the OBN is deployed to the sea surface; and A recovery point calculation device that calculates the recovery point of the OBN floating on the sea surface based on the recovery path predicted by the above-mentioned recovery path prediction device; A seabed node deployment / retrieval system characterized by further including:

4. In a seabed node placement / recovery method performed by a seabed node placement / recovery system, A step of predicting the movement path of the OBN from the sea surface to the sea floor in response to the marine area where the OBN is deployed; A step of setting an undersea point where the OBN is deployed among the above marine areas and storing the set undersea point; and A step of calculating the OBN's release point at the sea surface corresponding to the set seabed point based on the predicted movement path; A method for placing / recovering a seabed node, characterized by including:

5. In paragraph 4, A step of driving a floatation device installed on the OBN to float the OBN to the sea surface; A method for placing / recovering a seabed node, characterized in that it further includes:

6. In paragraph 5, A step of predicting the rising path of the OBN from the seabed point where the OBN is deployed to the sea surface; and A step of calculating a recovery point of the OBN floating on the sea surface based on the predicted injury path; A method for placing / recovering a seabed node, characterized in that it further includes:

7. An ocean information collection unit that collects ocean information including changes in ocean current direction and ocean current speed according to changes in depth from sea surface to sea bottom, and changes in depth from sea surface to sea bottom in the ocean area where OBN (Ocean Bottom Node) is to be deployed; A mass measuring unit for measuring the mass of the above OBN; and A movement path prediction unit that predicts the movement path of the OBN from the sea surface to the sea floor based on the collected ocean information and the measured mass; Includes, A seabed node placement device characterized in that the OBN is dropped from the sea surface and placed on the seabed based on the predicted movement path.

8. In paragraph 7, A seabed point setting unit that sets the seabed point where the above OBN is placed; A seabed node placement device characterized by further including:

9. In paragraph 8, A parallel movement control unit that controls the parallel movement in the forward, backward, left, and right directions along the predicted movement path; and A drop point calculation unit that calculates the drop point of the OBN at the sea surface based on the starting point of the movement path when the destination point of the movement path matches the set seabed point; A seabed node placement device characterized by further including:

10. A step of collecting ocean information including the mass of the OBN, the depth from the sea surface to the seabed in the ocean area where the OBN is to be deployed, the change in the direction of the ocean current from the sea surface to the seabed, and the change in the speed of the ocean current; A step of predicting the movement path of the OBN from the sea surface to the sea floor based on the collected ocean information and the measured mass; and A step of releasing the OBN from the sea surface based on the predicted movement path; A method for arranging seabed nodes, characterized by including:

11. In paragraph 10, A step of setting a seabed point where the above OBN is deployed; A seabed node placement device characterized by further including:

12. In paragraph 11, A step of controlling parallel movement in the forward, backward, left, and right directions along the predicted movement path; and A step of calculating the OBN's release point at the sea surface based on the starting point of the movement path when the destination point of the movement path matches the set seabed point; A method for arranging seabed nodes, characterized by further including:

13. An ocean information collection unit that collects ocean information including the depth from the sea surface to the seabed, changes in the direction of ocean currents from the sea surface to the seabed, and changes in ocean current speed in the ocean area where the OBN (Ocean Bottom Node) is deployed; A mass information storage unit that stores mass information including the mass of the above OBN; A surfacing path prediction unit that predicts the surfacing path of the OBN when it floats from the seabed to the sea surface based on the collected oceanographic information and the stored mass information; and A recovery point prediction unit that predicts the recovery point of the OBN floating on the sea surface based on the predicted injury path; A seabed node recovery device characterized by including:

14. In paragraph 13, A seabed point storage unit that stores the seabed point where the above OBN is deployed; A seabed node recovery device characterized by further including:

15. In paragraph 14, A levitation device driving unit that transmits a driving signal to the levitation device installed in the above OBN to drive the levitation device; A seabed node recovery device characterized by further including:

16. In a method for recovering a seabed node performed by a seabed node recovery device, A step of collecting ocean information including the mass of the OBN, the depth from the sea surface to the seabed in the ocean area where the OBN is deployed, the change in the direction of the ocean current from the sea surface to the seabed, and the change in the speed of the ocean current; A step of predicting the buoyancy path of the OBN when it floats from the seabed to the sea surface based on the collected oceanographic information and the stored mass information; and A step of predicting the recovery point of the OBN floating on the sea surface based on the predicted injury path; A method for recovering a seabed node, characterized by including:

17. In paragraph 16, A step of storing the seabed point where the above OBN is deployed; A method for recovering a seabed node, characterized by further including:

18. In paragraph 17, A step of transmitting a driving signal to a levitation device installed in the above OBN to drive the levitation device; A method for recovering a seabed node, characterized by further including:

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