Method, device and electronic equipment for predicting suspended section of submarine cable

Abstract

The present invention proposes a method, device and electronic device for predicting suspended sections of submarine cables, wherein the method comprises: obtaining multiple information of the sea area of ​​the submarine cable routing area in at least two periods, and determining the underwater terrain annual scouring and silting DEM file of the sea area of ​​the submarine cable routing area according to the multiple information of at least two periods, and / or the simulated annual scouring and silting value of each area of ​​the submarine cable routing, after segmenting the submarine cable routing to obtain the coordinates of the marking points of each segment, according to the coordinates of the marking points of each segment, and according to the underwater terrain annual scouring and silting DEM file of the sea area of ​​the submarine cable routing area and / or the simulated annual scouring and silting value of each area of ​​the submarine cable routing, the terrain annual scouring and silting value of the marking point of each segment is determined, thereby comparing the terrain annual scouring and silting value of the marking point of each segment with the buried depth of the submarine cable to determine the suspended section of the submarine cable. In this way, the path can be optimized, the routing of the easily suspended section can be avoided, unnecessary investment can be reduced, and the engineering cost can be reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of submarine cable detection, and in particular to a method, device and electronic equipment for predicting a suspended section of a submarine cable. Background Art

[0002] Submarine cables, also known as submarine cables, play an important role in marine energy development, island economic development, and national territorial security. Regular inspection of submarine cable routes, burial depths, faults, and other information is a necessary means to ensure the safe and reliable operation of submarine cable systems. However, since the submarine cable route design may span many suspended sections, the submarine cable is likely to be suspended, and the submarine cable is prone to damage under the influence of hydrodynamic forces such as tides, currents, and waves, which can lead to accidents.

[0003] Therefore, finding a method that can effectively predict the suspended section of submarine cables has important guiding significance for the routing design and application of submarine cables. Summary of the invention

[0004] The present invention aims to solve one of the technical problems in the related art at least to a certain extent.

[0005] To this end, the first purpose of the present invention is to propose a method for predicting the suspended section of a submarine cable, so as to achieve the goal of guiding the route design of the submarine cable by effectively predicting the suspended section of the submarine cable during the submarine cable design stage, so as to avoid the submarine cable being suspended with a high probability due to the route design spanning many suspended sections, which may easily cause the submarine cable to be damaged under the influence of hydrodynamic forces such as tides, currents, and waves, thereby causing accidents and hazards.

[0006] The second object of the present invention is to provide a device for predicting the suspended section of a submarine cable.

[0007] A third objective of the present invention is to provide an electronic device.

[0008] A fourth object of the present invention is to provide a non-transitory computer-readable storage medium.

[0009] A fifth object of the present invention is to provide a computer program product.

[0010] To achieve the above-mentioned purpose, a first embodiment of the present invention provides a method for predicting a suspended section of a submarine cable, comprising:

[0011] Acquire multiple information of the sea area in the submarine cable routing area for at least two periods, wherein the multiple information includes at least one of underwater topography information, hydrological information, and sediment information;

[0012] Determine, based on the plurality of information of the at least two periods, a DEM file of underwater terrain annual scouring and silting of the sea area in the submarine cable route area, and / or simulated annual scouring and silting values ​​of each area of ​​the submarine cable route;

[0013] Divide the submarine cable route into segments to obtain the coordinates of the marking points of each segment, wherein the marking points include at least one of a starting point, a midpoint and an ending point;

[0014] Determine the terrain annual scouring and silting value of the marking point of each segment according to the coordinates of the marking point of each segment, and according to the underwater terrain annual scouring and silting DEM file of the sea area of ​​the submarine cable routing area and / or the simulated annual scouring and silting value of each area of ​​the submarine cable routing;

[0015] The annual scouring and silting value of the terrain at the marking point of each segment is compared with the buried depth of the submarine cable to determine the suspended section of the submarine cable.

[0016] Optionally, as a first possible implementation manner of the first aspect, determining, based on the multiple information of the at least two periods, an underwater terrain annual scouring and silting DEM file of the sea area in the submarine cable routing area, and / or a simulated annual scouring and silting value of each area of ​​the submarine cable routing, includes:

[0017] Determine the underwater terrain DEM file of the at least two periods according to the plurality of information of the at least two periods;

[0018] According to the difference between the underwater terrain DEM files of any two periods of the at least two periods, obtaining terrain scouring and silting DEM files of the two periods;

[0019] According to the terrain scouring and silting DEM files of the two periods and the time difference between the two periods, the underwater terrain annual scouring and silting DEM files of the sea area in the submarine cable routing area corresponding to each period are obtained.

[0020] Optionally, as a second possible implementation manner of the first aspect, determining the underwater terrain annual scouring and silting DEM file of the sea area in the submarine cable routing area according to the underwater terrain information of the at least two periods, and / or the simulated annual scouring and silting values ​​of each area of ​​the submarine cable routing, includes:

[0021] Determine the underwater terrain DEM file of the at least two periods according to the plurality of information of the at least two periods;

[0022] The sea area within the underwater terrain DEM file corresponding to each period is meshed by quadrilateral meshing to obtain the underwater terrain DEM file of any quadrilateral network contained in the corresponding period;

[0023] Using the tidal wave model, determine the open sea boundary of the sea area within the scope of the underwater topography DEM file corresponding to each of the said periods;

[0024] According to the offshore opening boundary, annual scouring and silting simulation is performed to obtain simulated annual scouring and silting values ​​of the sea area in the submarine cable routing area corresponding to multiple tidal periods contained in the corresponding period;

[0025] The simulated annual scouring and silting values ​​of each area of ​​the submarine cable route are determined based on the simulated annual scouring and silting values ​​of the sea area in the submarine cable route area corresponding to the multiple tidal periods contained in each of the said periods.

[0026] Optionally, as a third possible implementation manner of the first aspect, determining the terrain annual scouring and silting value of the marking point of each segment according to the coordinates of the marking point of each segment, and according to the underwater terrain annual scouring and silting DEM file of the sea area of ​​the submarine cable routing area and / or the simulated annual scouring and silting values ​​of each area of ​​the submarine cable routing, includes:

[0027] According to the coordinates of the marking points of each segment, the marking points of each segment are respectively located in the quadrilateral grids in the underwater terrain annual scouring and silting DEM file of the sea area of ​​the submarine cable routing area corresponding to each period;

[0028] The terrain annual scouring and silting value of the marking point of each segment is determined according to the terrain annual scouring and silting values ​​of four nodes in the quadrilateral grid where the marking point of each segment is located.

[0029] Optionally, as a fourth possible implementation manner of the first aspect, determining the terrain annual scouring and silting value of the marking point of each segment according to the coordinates of the marking point of each segment, and according to the underwater terrain annual scouring and silting DEM file of the sea area of ​​the submarine cable routing area and / or the simulated annual scouring and silting values ​​of each area of ​​the submarine cable routing, includes:

[0030] According to the coordinates of the marking points of each segment, the marking points of each segment are respectively located in the quadrilateral grids in the sea area simulation results within the range of the underwater terrain DEM file corresponding to each period;

[0031] The terrain annual scouring and silting value of the marking point of each segment is determined according to the terrain annual scouring and silting values ​​of four nodes in the quadrilateral grid where the marking point of each segment is located.

[0032] Optionally, as a fifth possible implementation manner of the first aspect, determining the terrain annual scouring and silting value of the marking point of each segment according to the terrain annual scouring and silting values ​​of four nodes in the quadrilateral grid where the marking point of each segment is located includes:

[0033] Compare the terrain annual scouring and silting values ​​of four nodes in the quadrilateral grid where the marked point of each segment is located with one quarter of the still water depth of the marked point position in the underwater terrain DEM file of the at least two periods;

[0034] If the annual terrain scouring and silting values ​​of the four nodes in the quadrilateral grid where the marking point of each segment is located exceed one quarter of the still water depth of the marking point position in the underwater terrain DEM file of the at least two periods, the submarine cable route is re-segmented, and the annual terrain scouring and silting values ​​of the four nodes in the quadrilateral grid where the marking point of each segment is located are re-determined;

[0035] If the annual terrain scouring and silting values ​​of the four nodes in the quadrilateral grid where the marking point of each segment is located are less than one-fourth of the still water depth of the marking point position in the underwater terrain DEM file of at least two periods, then the annual terrain scouring and silting values ​​of the marking point of each segment are determined based on the annual terrain scouring and silting values ​​of the four nodes in the quadrilateral grid where the marking point of each segment is located.

[0036] Optionally, as a sixth possible implementation manner of the first aspect, after comparing the annual terrain scouring and silting value of the marking point of each segment with the buried depth of the submarine cable to determine the suspended section of the submarine cable, the method further includes:

[0037] According to the underwater terrain annual erosion and siltation DEM file of the sea area where the submarine cable is routed, determine the first candidate suspended section of the submarine cable;

[0038] Determine the second candidate suspended section of the submarine cable according to the simulated annual scouring and silting values ​​of each area of ​​the submarine cable route;

[0039] The suspended segment of the submarine cable route is determined according to the segments belonging to the first candidate suspended segment and the second candidate suspended segment.

[0040] The method for predicting the suspended section of a submarine cable in an embodiment of the present invention obtains multiple information of the sea area of ​​the submarine cable routing area in at least two periods, and determines the underwater terrain annual scouring and silting DEM file of the sea area of ​​the submarine cable routing area and / or the simulated annual scouring and silting value of each area of ​​the submarine cable routing according to the multiple information of at least two periods. After the submarine cable routing is segmented to obtain the coordinates of the marking points of each segment, the terrain annual scouring and silting value of the marking point of each segment is determined according to the coordinates of the marking points of each segment, and according to the underwater terrain annual scouring and silting DEM file of the sea area of ​​the submarine cable routing area and / or the simulated annual scouring and silting value of each area of ​​the submarine cable routing, thereby comparing the terrain annual scouring and silting value of the marking point of each segment with the buried depth of the submarine cable to determine the suspended section of the submarine cable. In this way, the path can be optimized, the routing of the easily suspended section can be avoided, unnecessary investment can be reduced, and the project cost can be reduced.

[0041] To achieve the above-mentioned purpose, a second embodiment of the present invention provides a device for predicting a suspended section of a submarine cable, comprising:

[0042] An acquisition module, used to acquire multiple information of the sea area in the submarine cable routing area in at least two periods, wherein the multiple information includes at least one of underwater topography information, hydrological information and sediment information;

[0043] A first determination module is used to determine the underwater terrain annual scouring and silting DEM file of the sea area in the submarine cable routing area and / or the simulated annual scouring and silting value of each area of ​​the submarine cable routing according to the multiple information of the at least two periods;

[0044] A segmentation module, used to segment the submarine cable route to obtain the coordinates of the marking points of each segment, wherein the marking points include at least one of a starting point, a midpoint and an ending point;

[0045] The second determination module is used to determine the terrain annual scouring and silting value of the marking point of each segment according to the coordinates of the marking point of each segment, and according to the underwater terrain annual scouring and silting DEM file of the sea area of ​​the submarine cable routing area and / or the simulated annual scouring and silting value of each area of ​​the submarine cable routing;

[0046] The third determination module is used to compare the annual scouring and silting value of the terrain at the marking point of each segment with the buried depth of the submarine cable to determine the suspended section of the submarine cable.

[0047] Optionally, as a first possible implementation manner of the second aspect, the first determining module is configured to:

[0048] Determine the underwater terrain DEM file of the at least two periods according to the plurality of information of the at least two periods;

[0049] According to the difference between the underwater terrain DEM files of any two periods of the at least two periods, obtaining terrain scouring and silting DEM files of the two periods;

[0050] According to the terrain scouring and silting DEM files of the two periods and the time difference between the two periods, the underwater terrain annual scouring and silting DEM files of the sea area in the submarine cable routing area corresponding to each period are obtained.

[0051] Optionally, as a second possible implementation manner of the second aspect, the first determining module is configured to:

[0052] Determine the underwater terrain DEM file of the at least two periods according to the plurality of information of the at least two periods;

[0053] The sea area within the underwater terrain DEM file corresponding to each period is meshed by quadrilateral meshing to obtain the underwater terrain DEM file of any quadrilateral network contained in the corresponding period;

[0054] Using the tidal wave model, determine the open sea boundary of the sea area within the scope of the underwater topography DEM file corresponding to each of the said periods;

[0055] According to the offshore opening boundary, annual scouring and silting simulation is performed to obtain simulated annual scouring and silting values ​​of the sea area in the submarine cable routing area corresponding to multiple tidal periods contained in the corresponding period;

[0056] The simulated annual scouring and silting values ​​of each area of ​​the submarine cable route are determined based on the simulated annual scouring and silting values ​​of the sea area in the submarine cable route area corresponding to the multiple tidal periods contained in each of the said periods.

[0057] Optionally, as a third possible implementation manner of the second aspect, the second determining module includes:

[0058] The first positioning unit is used to position the marking point of each segment in the quadrilateral grid in the underwater terrain annual scouring and silting DEM file of the sea area of ​​the submarine cable routing area corresponding to each period according to the coordinates of the marking point of each segment;

[0059] The determination unit is used to determine the terrain annual scouring and silting value of the marking point of each segment according to the terrain annual scouring and silting values ​​of four nodes in the quadrilateral grid where the marking point of each segment is located.

[0060] Optionally, as a fourth possible implementation manner of the second aspect, the second determining module includes:

[0061] A second positioning unit is used to position the marking points of each segment in the quadrilateral grid of the sea area simulation result within the range of the underwater terrain DEM file corresponding to each period according to the coordinates of the marking points of each segment;

[0062] The determination unit is used to determine the terrain annual scouring and silting value of the marking point of each segment according to the terrain annual scouring and silting values ​​of four nodes in the quadrilateral grid where the marking point of each segment is located.

[0063] Optionally, as a fifth possible implementation manner of the second aspect, the determining unit is configured to:

[0064] Compare the terrain annual scouring and silting values ​​of four nodes in the quadrilateral grid where the marked point of each segment is located with one quarter of the still water depth of the marked point position in the underwater terrain DEM file of the at least two periods;

[0065] If the annual terrain scouring and silting values ​​of the four nodes in the quadrilateral grid where the marking point of each segment is located exceed one quarter of the still water depth of the marking point position in the underwater terrain DEM file of the at least two periods, the submarine cable route is re-segmented, and the annual terrain scouring and silting values ​​of the four nodes in the quadrilateral grid where the marking point of each segment is located are re-determined;

[0066] If the annual terrain scouring and silting values ​​of the four nodes in the quadrilateral grid where the marking point of each segment is located are less than one-fourth of the still water depth of the marking point position in the underwater terrain DEM file of at least two periods, then the annual terrain scouring and silting values ​​of the marking point of each segment are determined based on the annual terrain scouring and silting values ​​of the four nodes in the quadrilateral grid where the marking point of each segment is located.

[0067] Optionally, as a sixth possible implementation manner of the second aspect, the apparatus further includes:

[0068] The fourth determination module is used to determine the first candidate suspended section of the submarine cable according to the underwater terrain annual erosion and siltation DEM file of the sea area in the submarine cable routing area;

[0069] A fifth determination module is used to determine the second candidate suspended section of the submarine cable according to the simulated annual scouring and silting values ​​of each area of ​​the submarine cable route;

[0070] The sixth determination module is used to determine the suspended segment of the submarine cable route according to the segment belonging to the first candidate suspended segment and the second candidate suspended segment.

[0071] The submarine cable suspended section prediction device of the embodiment of the present invention obtains multiple information of the submarine cable routing area in at least two periods, and determines the underwater terrain annual scouring and silting DEM file of the submarine cable routing area and / or the simulated annual scouring and silting value of each area of ​​the submarine cable routing according to the multiple information of at least two periods. After the submarine cable routing is segmented to obtain the coordinates of the marking points of each segment, the terrain annual scouring and silting value of the marking point of each segment is determined according to the coordinates of the marking points of each segment, and according to the underwater terrain annual scouring and silting DEM file of the submarine cable routing area and / or the simulated annual scouring and silting value of each area of ​​the submarine cable routing, so as to compare the terrain annual scouring and silting value of the marking point of each segment with the buried depth of the submarine cable to determine the suspended section of the submarine cable. In this way, the path can be optimized, the routing of the easily suspended section can be avoided, unnecessary investment can be reduced, and the project cost can be reduced.

[0072] To achieve the above object, a third aspect of the present invention provides an electronic device, including:

[0073] at least one processor; and

[0074] a memory communicatively connected to the at least one processor; wherein,

[0075] The memory stores instructions that can be executed by the at least one processor, and the instructions are executed by the at least one processor to enable the at least one processor to perform the method described in the first aspect.

[0076] In order to achieve the above-mentioned purpose, the fourth aspect of the present invention proposes a non-transitory computer-readable storage medium storing computer instructions, wherein the computer instructions are used to enable the computer to execute the method described in the first aspect.

[0077] In order to achieve the above-mentioned objective, a fifth aspect of the present invention provides a computer program product, including a computer program, wherein the computer program implements the method described in the first aspect when executed by a processor.

[0078] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0079] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the following description of the embodiments in conjunction with the accompanying drawings, in which:

[0080] Figure 1 A schematic diagram of a flow chart of a method for predicting a suspended section of a submarine cable provided by an embodiment of the present invention;

[0081] Figure 2 A schematic flow chart of another method for predicting a suspended section of a submarine cable provided by an embodiment of the present invention;

[0082] Figure 3 A schematic flow chart of another method for predicting a suspended section of a submarine cable provided by an embodiment of the present invention;

[0083] Figure 4 A schematic flow chart of another method for predicting a suspended section of a submarine cable provided by an embodiment of the present invention;

[0084] Figure 5 A schematic diagram of the process for determining the annual erosion and deposition values ​​of the terrain at the marking points of each segment;

[0085] Figure 6 A schematic diagram of the structure of a submarine cable suspended section prediction device provided by an embodiment of the present invention;

[0086] Figure 7 A schematic diagram of the structure of another submarine cable suspended section prediction device provided by an embodiment of the present invention; and

[0087] Figure 8 A schematic diagram of the structure of an electronic device provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0088] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0089] The following describes a method and device for predicting a suspended section of a submarine cable according to an embodiment of the present invention with reference to the accompanying drawings.

[0090] Figure 1 A schematic flow chart of a method for predicting a suspended section of a submarine cable provided in an embodiment of the present invention.

[0091] In related technologies, the detection of suspended sections is mainly achieved by observing after the submarine cable is laid. For example, after the submarine cable is laid, underwater observation technology is used to directly observe the seabed where the submarine cable is located to detect the suspended section of the submarine cable. As a result, the submarine cable is likely to be suspended due to the routing design spanning many suspended sections, and the submarine cable is prone to damage under the influence of hydrodynamic forces such as tides, currents, and waves, causing accidents and hazards.

[0092] To address this problem, an embodiment of the present invention provides a method for predicting the suspended section of a submarine cable, so as to achieve effective prediction of the suspended section of the submarine cable during the design stage of the submarine cable, guide the design of the submarine cable route, and avoid the high probability of the submarine cable being suspended due to the route design spanning many suspended sections. Under the action of hydrodynamic forces such as tides, currents, and waves, the submarine cable is easily damaged, which in turn causes accidents and hazards, such as Figure 1 As shown, the method for predicting the suspended section of a submarine cable includes the following steps:

[0093] Step 101, obtaining a plurality of information of the sea area in the submarine cable routing area for at least two periods, wherein the plurality of information includes at least one of underwater topography information, hydrological information and sediment information.

[0094] It should be noted that the method for predicting the suspended section of a submarine cable provided in this embodiment can be executed by a submarine cable suspended section prediction device, which can be an electronic device or can be configured in an electronic device to predict the suspended section of a submarine cable based on the hydrological sediment and topographic data of the sea area where the submarine cable is laid and operated. This embodiment is described by taking the submarine cable suspended section prediction device configured in an electronic device as an example.

[0095] Among them, the electronic device can be any stationary or mobile computing device capable of data processing, such as mobile computing devices such as laptops, smart phones, wearable devices, or stationary computing devices such as desktop computers, or servers, or other types of computing devices, etc. This embodiment does not limit this.

[0096] In this embodiment, based on the submarine cable route design and the submarine cable laying and operation plan, the underwater topographic information, hydrological information and sediment information of the submarine cable routing area over the years can be collected, so as to obtain multiple information of the sea area of ​​the submarine cable routing area in at least two periods, wherein the multiple information includes at least one of the underwater topographic information, hydrological information and sediment information.

[0097] It should be noted that the submarine cable suspended section prediction device in this embodiment can obtain the submarine cable route design and the submarine cable laying and operation plan through various open, legal and compliant methods, and then collect the underwater topography information, hydrological information and sediment information of the submarine cable route area over the years according to the submarine cable route design and the submarine cable laying and operation plan. For example, the submarine cable suspended section prediction device can obtain the submarine cable route design and the submarine cable laying and operation plan after being authorized by the person in charge of the submarine cable route design and the submarine cable laying and operation plan, or it can also obtain the submarine cable route design and the submarine cable laying and operation plan from other devices after being authorized by the person in charge of the submarine cable route design and the submarine cable laying and operation plan, or it can also obtain the submarine cable route design and the submarine cable laying and operation plan through other open, legal and compliant methods, and the present disclosure does not limit this.

[0098] Step 102, based on multiple information of at least two periods, determine the underwater terrain annual erosion and siltation DEM (Digital Elevation Model) file of the sea area in the submarine cable routing area, and / or the simulated annual erosion and siltation value of each area of ​​the submarine cable routing.

[0099] In this embodiment, the suspended section of the submarine cable can be predicted from two different aspects. On the one hand, based on the multiple information of the submarine cable routing area in different periods obtained in step 101, from the perspective of seabed evolution, the underwater terrain annual scouring and silting DEM file of the submarine cable routing area can be determined, and then the suspended section of the submarine cable can be predicted. On the other hand, based on the multiple information of the submarine cable routing area in different periods obtained in step 101, from the perspective of simulation modeling, the seabed scouring and silting conditions of the submarine cable routing area can be simulated and analyzed, and from the perspective of natural scouring and silting of the riverbed, the simulated annual scouring and silting values ​​of each area of ​​the submarine cable routing can be determined, and then the suspended section of the submarine cable can be predicted.

[0100] In an exemplary embodiment, the multiple information of the sea area in the submarine cable routing area at different periods obtained in step 101 can be superimposed, and the overlapping parts can be identified, so as to use digital vectorization technology to determine the underwater terrain DEM files of at least two periods based on the multiple information of the sea area in the submarine cable routing area at least two periods. The resolutions Δx and Δy of the underwater terrain DEM files need to meet the following conditions:

[0101]

[0102]

[0103] Where, I is the total number of rows of data in the underwater terrain DEM file; J is the total number of columns of data in the underwater terrain DEM file; subscript i represents the i-th row in the underwater terrain DEM file; subscript j represents the j-th column in the underwater terrain DEM file; x ij Represents the Cartesian horizontal coordinate of the data in the i-th row and j-th column of the underwater terrain DEM file; y ij Represents the Cartesian ordinate of the data in the i-th row and j-th column of the underwater terrain DEM file; z ij Represents the elevation of the data in the i-th row and j-th column of the underwater terrain DEM file.

[0104] Furthermore, the underwater terrain annual scouring and silting DEM file of the sea area in the submarine cable routing area can be determined based on the underwater terrain DEM files of the two periods and the time difference between the two periods, and / or, by dividing the sea area within the scope of the underwater terrain DEM file, using the model to simulate the annual scouring and silting of the sea area within the scope of the divided underwater terrain DEM file, the simulated annual scouring and silting values ​​of each area of ​​the submarine cable routing can be determined.

[0105] Step 103, dividing the submarine cable route into segments to obtain the coordinates of the marking points of each segment, wherein the marking points include at least one of a starting point, a midpoint, and an ending point.

[0106] As a possible implementation method, drawing software can be used to divide the submarine cable route into segments at fixed intervals, and the marker point coordinates of each segment can be located to obtain the marker point coordinates of each segment, wherein the marker point includes at least one of a starting point, a midpoint, and an end point.

[0107] For example, the submarine cable route can be segmented into sections at intervals of 2 to 20 meters using CAD software to obtain the sections, and then the starting point, midpoint, and end point coordinates of each section can be obtained by locating the starting point, midpoint, and end point coordinates of each section.

[0108] Step 104, determining the terrain annual scouring and silting value of the marking point of each segment according to the coordinates of the marking point of each segment, and according to the underwater terrain annual scouring and silting DEM file of the sea area of ​​the submarine cable routing area and / or the simulated annual scouring and silting values ​​of each area of ​​the submarine cable routing.

[0109] On the one hand, since the underwater terrain annual scouring and silting DEM file of the sea area of ​​the submarine cable routing area already contains implicit grid information, the position of the marking point of each segment in the quadrilateral grid in the underwater terrain annual scouring and silting DEM file of the sea area of ​​the submarine cable routing area can be determined according to the coordinates of the marking points of each segment and the underwater terrain annual scouring and silting DEM file of the sea area of ​​the submarine cable routing area, and then the terrain annual scouring and silting value of the marking point of each segment can be determined. Among them, the marking point includes at least one of the starting point, the midpoint and the ending point. It should be noted that the quadrilateral grid in the underwater terrain annual scouring and silting DEM file of the sea area of ​​the submarine cable routing area is a regular quadrilateral grid.

[0110] On the other hand, since the sea area within the scope of the underwater terrain DEM file is segmented, the model is used to simulate the annual scouring and silting of the sea area within the scope of the underwater terrain DEM file that has been segmented, and the simulated annual scouring and silting values ​​of each area of ​​the submarine cable route are determined, the position of the quadrilateral grid of the marking point of each segment in the simulation result of the sea area within the scope of the underwater terrain DEM file can be determined according to the coordinates of the marking points of each segment and the simulated annual scouring and silting values ​​of each area of ​​the submarine cable route, and then the terrain annual scouring and silting value of the marking point of each segment can be determined. Among them, the marking point includes at least one of the starting point, the midpoint and the end point. It should be noted that the quadrilateral grid in the simulation result of the sea area within the scope of the underwater terrain DEM file can be any quadrilateral grid.

[0111] Step 105, comparing the annual scouring and silting value of the terrain at the marking point of each segment with the buried depth of the submarine cable to determine the suspended section of the submarine cable.

[0112] In this embodiment, the terrain annual scouring and silting value of the marking point of each segment is compared with the buried depth of the submarine cable. When the terrain annual scouring and silting value of the marking point of a segment is lower than the buried depth of the submarine cable by 0.5 meters, it is determined to be a suspended section of the submarine cable. The marking point includes at least one of the starting point, the midpoint and the end point.

[0113] It can be understood that when the annual scouring and silting values ​​of the terrain at the starting point, midpoint and end point of a segment are all lower than the buried depth of the submarine cable by 0.5 meters, the segment can be considered to be in a suspended state, and the segment is thus determined as a suspended section of the submarine cable.

[0114] In this embodiment, by obtaining multiple information of the sea area of ​​the submarine cable routing area in at least two periods, the underwater terrain annual scouring and silting DEM file of the sea area of ​​the submarine cable routing area and / or the simulated annual scouring and silting value of each area of ​​the submarine cable routing are determined according to the multiple information of at least two periods. After the submarine cable routing is segmented to obtain the coordinates of the marking points of each segment, the terrain annual scouring and silting value of the marking point of each segment is determined according to the coordinates of the marking points of each segment, and according to the underwater terrain annual scouring and silting DEM file of the sea area of ​​the submarine cable routing area and / or the simulated annual scouring and silting value of each area of ​​the submarine cable routing, so as to compare the terrain annual scouring and silting value of the marking point of each segment with the buried depth of the submarine cable to determine the suspended section of the submarine cable. Therefore, by predicting the suspended section of the submarine cable, a basis can be provided for the selection of submarine cable paths, cable selection, and safety assessment of the operation of the suspended section of the submarine cable in operation, so as to avoid the routing of the easily suspended section, reduce unnecessary investment, and reduce the project cost.

[0115] In order to clearly illustrate the process of determining the underwater terrain annual erosion and siltation DEM file of the submarine cable routing area from the perspective of seabed evolution based on multiple information of the submarine cable routing area in different periods obtained in the previous embodiment, and then predicting the suspended section of the submarine cable, this embodiment provides another method for predicting the suspended section of the submarine cable. Figure 2 A schematic flow chart of another method for predicting a suspended section of a submarine cable provided in an embodiment of the present invention.

[0116] like Figure 2 As shown, the method for predicting the suspended section of a submarine cable may include the following steps:

[0117] Step 201, obtaining a plurality of information of the sea area in the submarine cable routing area for at least two periods, wherein the plurality of information includes at least one of underwater topography information, hydrological information and sediment information.

[0118] It should be noted that the execution process of this step may specifically refer to step 101 in the previous embodiment, and the principle is the same, which will not be repeated here.

[0119] Step 202: Determine underwater terrain DEM files of at least two periods based on a plurality of information of at least two periods.

[0120] In this embodiment, multiple information of the sea area of ​​the submarine cable routing area obtained in different periods can be superimposed, and the overlapping parts can be identified, so as to use digital vectorization technology to determine the underwater terrain DEM files of at least two periods based on multiple information of the sea area of ​​the submarine cable routing area in at least two periods. Among them, the resolution Δx and Δy of the underwater terrain DEM file must meet the following conditions:

[0121]

[0122]

[0123] Where, I is the total number of rows of data in the underwater terrain DEM file; J is the total number of columns of data in the underwater terrain DEM file; subscript i represents the i-th row in the underwater terrain DEM file; subscript j represents the j-th column in the underwater terrain DEM file; x ij Represents the Cartesian horizontal coordinate of the data in the i-th row and j-th column of the underwater terrain DEM file; y ij Represents the Cartesian ordinate of the data in the i-th row and j-th column of the underwater terrain DEM file; z ij Represents the elevation of the data in the i-th row and j-th column of the underwater terrain DEM file.

[0124] Step 203, obtaining terrain scouring and silting DEM files of the two periods according to the difference between the underwater terrain DEM files of any two periods in at least two periods.

[0125] Among them, the difference between the underwater terrain DEM files of any two periods may include at least one of the underwater terrain difference, hydrological difference and sediment difference, so that the terrain scouring and siltation DEM files of the two periods can be determined based on the difference between the underwater terrain DEM files of any two periods in at least two periods.

[0126] Step 204, based on the terrain scouring and silting DEM files of the two periods and the time difference between the two periods, obtain the underwater terrain annual scouring and silting DEM files of the sea area in the submarine cable routing area corresponding to each period.

[0127] In this embodiment, the two periods can be divided into a previous period and a later period according to the time, so as to subtract the terrain scouring and silting DEM file of the later period from the terrain scouring and silting DEM file of the previous period, and then divide it by the time difference between the two periods to obtain the underwater terrain annual scouring and silting DEM file of the sea area in the submarine cable routing area corresponding to each period. The time difference can be calculated in years.

[0128] Step 205, dividing the submarine cable route into segments to obtain the coordinates of the marking points of each segment, wherein the marking points include at least one of a starting point, a midpoint, and an ending point.

[0129] It should be noted that the execution process of this step may specifically refer to step 103 in the previous embodiment, and the principle is the same, which will not be repeated here.

[0130] Step 206, according to the coordinates of the marking points of each segment, the marking points of each segment are respectively located in the quadrilateral grids in the underwater terrain annual erosion and siltation DEM file of the sea area in the submarine cable routing area corresponding to each period.

[0131] Since the grid information is implicit in the underwater terrain annual scouring and silting DEM file of the sea area of ​​the submarine cable routing area corresponding to each period, the marking point of each segment can be located in the quadrilateral grid in the underwater terrain annual scouring and silting DEM file of the sea area of ​​the submarine cable routing area corresponding to each period according to the coordinates of the marking points of each segment. Among them, the marking point includes at least one of the starting point, the midpoint and the end point. It should be noted that the quadrilateral grid in the underwater terrain annual scouring and silting DEM file of the sea area of ​​the submarine cable routing area corresponding to each period is a regular quadrilateral grid.

[0132] Step 207, determining the terrain annual scouring and silting value of the marking point of each segment according to the terrain annual scouring and silting values ​​of the four nodes in the quadrilateral grid where the marking point of each segment is located.

[0133] In this embodiment, the terrain annual scouring and silting value of the marking point of each segment can be interpolated by using a bilinear interpolation method according to the terrain annual scouring and silting values ​​of the four nodes in the quadrilateral grid where the marking point of each segment is located. The marking point includes at least one of a starting point, a midpoint, and an end point.

[0134] Step 208, comparing the annual scouring and silting value of the terrain at the marking point of each segment with the buried depth of the submarine cable to determine the suspended section of the submarine cable.

[0135] It should be noted that the execution process of this step may specifically refer to step 105 in the previous embodiment, and the principle is the same, which will not be repeated here.

[0136] In this embodiment, by obtaining multiple information of the sea area of ​​the submarine cable routing area in at least two periods, the underwater terrain annual scouring and silting DEM file of the sea area of ​​the submarine cable routing area is determined according to the multiple information of at least two periods. After the submarine cable routing is segmented to obtain the coordinates of the marking points of each segment, the terrain annual scouring and silting value of the marking point of each segment is determined according to the coordinates of the marking points of each segment and the underwater terrain annual scouring and silting DEM file of the sea area of ​​the submarine cable routing area, so as to compare the terrain annual scouring and silting value of the marking point of each segment with the buried depth of the submarine cable to determine the suspended section of the submarine cable. Therefore, by predicting the suspended section of the submarine cable, a basis can be provided for the selection of submarine cable routes, cable selection, and safety assessment of the operation of the suspended section of the submarine cable in operation, so as to avoid the routing of the easily suspended section, reduce unnecessary investment, and reduce the project cost.

[0137] In order to clearly illustrate the process of obtaining multiple information of the submarine cable routing area in different periods in the above embodiment, simulating and analyzing the seabed scouring and silting conditions in the submarine cable routing area from the perspective of simulation modeling, determining the simulated annual scouring and silting values ​​of each area of ​​the submarine cable routing from the perspective of natural scouring and silting of the riverbed, and then predicting the suspended sections that may appear in the submarine cable routing, this embodiment provides another method for predicting the suspended sections of submarine cables. Figure 3 A schematic flow chart of another method for predicting a suspended section of a submarine cable provided in an embodiment of the present invention.

[0138] like Figure 3 As shown, the method for predicting the suspended section of a submarine cable may include the following steps:

[0139] Step 301, obtaining a plurality of information of the sea area in the submarine cable routing area for at least two periods, wherein the plurality of information includes at least one of underwater topography information, hydrological information and sediment information.

[0140] It should be noted that the execution process of this step may specifically refer to step 101 in the above embodiment, and the principle is the same, which will not be repeated here.

[0141] Step 302: Determine underwater terrain DEM files of at least two periods based on a plurality of information of at least two periods.

[0142] It should be noted that the execution process of this step may specifically refer to step 202 in the previous embodiment, and the principle is the same, which will not be repeated here.

[0143] Step 303, using a quadrilateral meshing method, meshing the sea area within the underwater terrain DEM file corresponding to each period, so as to obtain an underwater terrain DEM file containing any quadrilateral network in the corresponding period.

[0144] In this embodiment, the sea area within the underwater terrain DEM file corresponding to each period may be meshed by using a quadrilateral meshing method, thereby obtaining an underwater terrain DEM file containing any quadrilateral network in the corresponding period.

[0145] The grid resolution must meet the following conditions:

[0146]

[0147] Where z1, z2, z3, and z4 are the elevations of the underwater terrain DEM file data at the four nodes of any quadrilateral grid; L1, L2, L3, and L4 are the lengths of the four sides of any quadrilateral grid.

[0148] Step 304, using the tidal wave model, determine the outer sea opening boundary of the sea area within the scope of the underwater terrain DEM file corresponding to each period.

[0149] Here, the tidal wave model can be used to provide an open sea boundary for the sea area within the scope of the underwater topography DEM file corresponding to each period, thereby determining the open sea boundary of the sea area within the scope of the underwater topography DEM file corresponding to each period.

[0150] Step 305, based on the outer sea open boundary of the sea area within the scope of the underwater terrain DEM file corresponding to each period, annual scouring and silting simulation is performed to obtain the simulated annual scouring and silting values ​​of the sea area in the submarine cable routing area corresponding to multiple tidal periods contained in the corresponding period.

[0151] In this embodiment, according to the outer sea open boundary of the sea area within the scope of the underwater terrain DEM file corresponding to each period, and according to the bottom conditions of the sea area where the submarine cable is laid, annual scouring and silting simulation can be performed to drive the tidal wave movement and sediment transport simulation in the sea area within the scope of the underwater terrain DEM file corresponding to each period, and simulate the bottom scouring and silting amplitude of the submarine cable routing area during the typical spring tide, medium tide and neap tide periods in the sea area, so as to obtain the simulated annual scouring and silting value of the sea area of ​​the submarine cable routing area corresponding to multiple tidal periods contained in the corresponding period. Among them, the selection of typical spring tide, medium tide and neap tide is determined according to the following principles: the tidal range of spring tide is 90% of the cumulative frequency of the annual tidal range, the tidal range of spring tide is 50% of the cumulative frequency of the annual tidal range, and the tidal range of spring tide is 10% of the cumulative frequency of the annual tidal range.

[0152] Step 306, determining the simulated annual scouring and silting values ​​of each area of ​​the submarine cable route according to the simulated annual scouring and silting values ​​of the sea area in the submarine cable route area corresponding to the multiple tidal periods contained in each period.

[0153] Here, the simulated annual scouring and silting values ​​of the sea area in the submarine cable route area corresponding to multiple tidal periods in each period can be determined based on the simulated annual scouring and silting values ​​of the sea area in the submarine cable route area, that is, based on the bottom scouring and silting results of typical spring tides, medium tides, and neap tides. Among them, the simulated annual scouring and silting values ​​of each area of ​​the submarine cable route are determined by the following formula:

[0154] E=0.25E spring +0.5E middle +0.25E neap

[0155] Where E is the simulated annual erosion and siltation value of each area of ​​the submarine cable route, and E spring 、E middle 、E neap They are the simulated annual scouring and sedimentation values ​​during typical high tide, medium tide and low tide respectively.

[0156] Step 307, dividing the submarine cable route into segments to obtain the coordinates of the marking points of each segment, wherein the marking points include at least one of a starting point, a midpoint, and an ending point.

[0157] It should be noted that the execution process of this step may specifically refer to step 103 in the above embodiment, and the principle is the same, which will not be repeated here.

[0158] Step 308, according to the coordinates of the marking points of each segment, the marking points of each segment are respectively located in the quadrilateral grids in the sea area simulation results within the range of the underwater terrain DEM file corresponding to each period.

[0159] Since the sea area within the scope of the underwater terrain DEM file is segmented, the model is used to simulate the annual scouring and silting of the sea area within the scope of the underwater terrain DEM file that has been segmented, and the simulated annual scouring and silting values ​​of each area of ​​the submarine cable route are determined, so that the marking points of each segment can be located in the quadrilateral grid in the simulation results of the sea area within the scope of the underwater terrain DEM file corresponding to each period according to the coordinates of the marking points of each segment. Among them, the marking point includes at least one of the starting point, the midpoint and the end point. It should be noted that the quadrilateral grid in the simulation results of the sea area within the scope of the underwater terrain DEM file can be any quadrilateral grid.

[0160] Step 309, determining the terrain annual scouring and silting value of the marking point of each segment according to the terrain annual scouring and silting values ​​of the four nodes in the quadrilateral grid where the marking point of each segment is located.

[0161] It should be noted that the execution process of this step may specifically refer to step 207 in the previous embodiment, and the principle is the same, which will not be repeated here.

[0162] Step 310, comparing the annual scouring and silting value of the terrain at the marking point of each segment with the buried depth of the submarine cable to determine the suspended section of the submarine cable.

[0163] It should be noted that the execution process of this step may specifically refer to step 105 in the above embodiment, and the principle is the same, which will not be repeated here.

[0164] In this embodiment, by obtaining multiple information of the sea area of ​​the submarine cable routing area in at least two periods, the simulated annual scouring and silting values ​​of each area of ​​the submarine cable routing are determined according to the multiple information of at least two periods. After the submarine cable routing is segmented to obtain the coordinates of the marking points of each segment, the terrain annual scouring and silting values ​​of the marking points of each segment are determined according to the coordinates of the marking points of each segment and the simulated annual scouring and silting values ​​of each area of ​​the submarine cable routing, so as to compare the terrain annual scouring and silting values ​​of the marking points of each segment with the buried depth of the submarine cable to determine the suspended section of the submarine cable. Therefore, by predicting the suspended section of the submarine cable, a basis can be provided for the selection of submarine cable routes, cable selection, and safety assessment of the operation of the suspended section of the submarine cable, so as to avoid the routing of the easily suspended section, reduce unnecessary investment, and reduce the project cost.

[0165] Based on the above embodiment, in order to more accurately determine the suspended section of the submarine cable, this embodiment provides another method for predicting the suspended section of the submarine cable. Figure 4A schematic flow chart of another method for predicting a suspended section of a submarine cable provided in an embodiment of the present invention.

[0166] like Figure 4 As shown, the method for predicting the suspended section of a submarine cable may include the following steps:

[0167] Step 401, obtaining a plurality of information of the sea area in the submarine cable routing area for at least two periods, wherein the plurality of information includes at least one of underwater topography information, hydrological information and sediment information.

[0168] It should be noted that the execution process of this step may specifically refer to step 101 in the above embodiment, and the principle is the same, which will not be repeated here.

[0169] Step 402, based on multiple information of at least two periods, determine the underwater terrain annual erosion and siltation DEM file of the sea area in the submarine cable route area, and the simulated annual erosion and siltation value of each area of ​​the submarine cable route.

[0170] In this embodiment, the suspended section of the submarine cable is predicted from two different aspects at the same time. On the one hand, based on the multiple information of the submarine cable routing area at different periods, from the perspective of seabed evolution, the underwater terrain annual scouring and silting DEM file of the submarine cable routing area is determined, and then the suspended section of the submarine cable is predicted. On the other hand, based on the multiple information of the submarine cable routing area at different periods, from the perspective of simulation modeling, the seabed scouring and silting conditions of the submarine cable routing area are simulated and analyzed, and from the perspective of natural scouring and silting of the riverbed, the simulated annual scouring and silting values ​​of each area of ​​the submarine cable routing are determined, and then the suspended section of the submarine cable is predicted.

[0171] As a possible implementation method, multiple information of the sea area in the submarine cable routing area obtained in different periods can be superimposed, and the overlapping parts can be marked, so as to use digital vectorization technology to determine the underwater terrain DEM files of at least two periods based on multiple information of the sea area in the submarine cable routing area. Then, the underwater terrain annual scouring and silting DEM file of the sea area in the submarine cable routing area can be determined based on the underwater terrain DEM files of the two periods and the time difference between the two periods, and by segmenting the sea area within the scope of the underwater terrain DEM file, the model is used to simulate the annual scouring and silting of the sea area within the scope of the segmented underwater terrain DEM file, and the simulated annual scouring and silting values ​​of each area of ​​the submarine cable routing can be determined.

[0172] Step 403, the submarine cable route is segmented to obtain the coordinates of the marking points of each segment, wherein the marking points include at least one of a starting point, a midpoint and an ending point.

[0173] It should be noted that the execution process of this step may specifically refer to step 103 in the above embodiment, and the principle is the same, which will not be repeated here.

[0174] Step 404, determine the terrain annual scouring and silting value of the marking point of each segment according to the coordinates of the marking point of each segment, the underwater terrain annual scouring and silting DEM file of the sea area of ​​the submarine cable routing area and the simulated annual scouring and silting values ​​of each area of ​​the submarine cable routing.

[0175] On the one hand, since the underwater terrain annual scouring and silting DEM file of the sea area of ​​the submarine cable routing area already contains implicit grid information, the position of the marking point of each segment in the quadrilateral grid in the underwater terrain annual scouring and silting DEM file of the sea area of ​​the submarine cable routing area can be determined according to the coordinates of the marking points of each segment and the underwater terrain annual scouring and silting DEM file of the sea area of ​​the submarine cable routing area, and then the terrain annual scouring and silting value of the marking point of each segment can be determined. Among them, the marking point includes at least one of the starting point, the midpoint and the ending point. It should be noted that the quadrilateral grid in the underwater terrain annual scouring and silting DEM file of the sea area of ​​the submarine cable routing area is a regular quadrilateral grid.

[0176] On the other hand, since the sea area within the scope of the underwater terrain DEM file is segmented, the model is used to simulate the annual scouring and silting of the sea area within the scope of the underwater terrain DEM file that has been segmented, and the simulated annual scouring and silting values ​​of each area of ​​the submarine cable route are determined, the position of the quadrilateral grid of the marking point of each segment in the simulation result of the sea area within the scope of the underwater terrain DEM file can be determined according to the coordinates of the marking points of each segment and the simulated annual scouring and silting values ​​of each area of ​​the submarine cable route, and then the terrain annual scouring and silting value of the marking point of each segment can be determined. Among them, the marking point includes at least one of the starting point, the midpoint and the end point. It should be noted that the quadrilateral grid in the simulation result of the sea area within the scope of the underwater terrain DEM file can be any quadrilateral grid.

[0177] Step 405, comparing the annual scouring and silting value of the terrain at the marking point of each segment with the buried depth of the submarine cable to determine the suspended section of the submarine cable.

[0178] It should be noted that the execution process of this step may specifically refer to step 105 in the above embodiment, and the principle is the same, which will not be repeated here.

[0179] Step 406, determining the first candidate suspended section of the submarine cable according to the underwater terrain annual erosion and siltation DEM file of the sea area in the submarine cable routing area.

[0180] In this embodiment, the suspended section of the submarine cable predicted based on the annual erosion and siltation DEM file of the underwater terrain in the sea area of ​​the submarine cable routing area is determined as the first candidate suspended section of the submarine cable.

[0181] Step 407, determining a second candidate suspended section of the submarine cable according to the simulated annual erosion and siltation values ​​of each area of ​​the submarine cable route.

[0182] In this embodiment, the predicted suspended section of the submarine cable is determined as the second candidate suspended section of the submarine cable according to the simulated annual scouring and silting values ​​of each area of ​​the submarine cable route.

[0183] Step 408, determining the suspended segment of the submarine cable route according to the segments belonging to the first candidate suspended segment and the second candidate suspended segment.

[0184] Then, the segment that belongs to both the first candidate suspended segment and the second candidate suspended segment is determined as the suspended segment of the submarine cable route. Thus, the prediction results of the two aspects are combined to predict and identify the suspended segment of the submarine cable route, which greatly improves the accuracy of the prediction of the suspended segment of the submarine cable route.

[0185] In this embodiment, by obtaining multiple information of the sea area of ​​the submarine cable routing area in at least two periods, the underwater terrain annual scouring and silting DEM file of the sea area of ​​the submarine cable routing area and the simulated annual scouring and silting value of each area of ​​the submarine cable routing are determined according to the multiple information of at least two periods. After the submarine cable routing is segmented to obtain the coordinates of the marking points of each segment, the terrain annual scouring and silting value of the marking point of each segment is determined according to the coordinates of the marking points of each segment, and according to the underwater terrain annual scouring and silting DEM file of the sea area of ​​the submarine cable routing area and the simulated annual scouring and silting value of each area of ​​the submarine cable routing, so as to compare the terrain annual scouring and silting value of the marking point of each segment with the buried depth of the submarine cable to determine the suspended section of the submarine cable. Therefore, by predicting the suspended section of the submarine cable, a basis can be provided for the selection of submarine cable paths, cable selection, and safety assessment of the operation of the suspended section of the submarine cable in operation, so as to avoid the routing of the easily suspended section, reduce unnecessary investment, and reduce the project cost.

[0186] To make it clear Figure 2 In the embodiment shown, in step 207, the process of determining the terrain annual scouring and silting value of the marking point of each segment according to the terrain annual scouring and silting values ​​of the four nodes in the quadrilateral grid where the marking point of each segment is located, this embodiment provides Figure 5 The flow chart of determining the annual erosion and deposition value of the terrain at the marking point of each segment is shown in Figure 5 As shown, according to the terrain annual scouring and silting values ​​of four nodes in the quadrilateral grid where the marking point of each segment is located, determining the terrain annual scouring and silting value of the marking point of each segment may include the following steps:

[0187] Step 501 : compare the annual scouring and silting values ​​of the four nodes in the quadrilateral grid where the marked point of each segment is located with one quarter of the still water depth of the marked point position in the underwater terrain DEM file of any two periods in at least two periods.

[0188] Here, the terrain annual scouring and silting values ​​of the four nodes in the quadrilateral grid where the marking point of each segment is located are compared with one quarter of the still water depth of the marking point position in the underwater terrain DEM file of any two periods in at least two periods, that is, the terrain annual scouring and silting values ​​of the four nodes in the quadrilateral grid where the marking point of each segment is located are compared with 0.25 times of the still water depth of the marking point position in the underwater terrain DEM file of any two periods in at least two periods. Among them, the marking point includes at least one of the starting point, the midpoint and the end point.

[0189] If two periods are divided into a previous period and a subsequent period according to the time sequence, the annual scouring and silting values ​​of the four nodes in the quadrilateral grid where the marking point of each segment is located are compared with one quarter of the still water depth of the marking point position in the underwater terrain DEM file of any two periods in at least two periods, that is, the annual scouring and silting values ​​of the four nodes in the quadrilateral grid where the marking point of each segment is located are compared with 0.25 times of the still water depth of the marking point position in the underwater terrain DEM file of the previous period and the underwater terrain DEM file of the subsequent period. Among them, the marking point includes at least one of the starting point, the midpoint and the end point.

[0190] Step 502, if the annual terrain scouring and silting values ​​of the four nodes in the quadrilateral grid where the marking point of each segment is located exceed one-fourth of the still water depth of the marking point position in the underwater terrain DEM file of at least two periods, the submarine cable route is re-segmented, and the annual terrain scouring and silting values ​​of the four nodes in the quadrilateral grid where the marking point of each segment is located are re-determined.

[0191] As a possible implementation method, if the terrain annual scouring and silting values ​​of the four nodes in the quadrilateral grid where the marking point of each segment is located exceed one-fourth of the still water depth of the marking point position in the underwater terrain DEM file of at least two periods, the interval of the submarine cable route segment can be reduced by half for re-segmentation, and the terrain annual scouring and silting DEM data can be used to re-interpolate and calculate the terrain annual scouring and silting values ​​of the four nodes in the quadrilateral grid where the marking point of each reduced route segment is located. The marking point includes at least one of the starting point, the midpoint and the end point.

[0192] Step 503, if the terrain annual scouring and silting values ​​of the four nodes in the quadrilateral grid where the marking point of each segment is located are less than one-fourth of the still water depth of the marking point position in the underwater terrain DEM file of at least two periods, then the terrain annual scouring and silting values ​​of the marking point of each segment are determined according to the terrain annual scouring and silting values ​​of the four nodes in the quadrilateral grid where the marking point of each segment is located.

[0193] If the terrain annual scouring and silting values ​​of the four nodes in the quadrilateral grid where the marking point of each segment is located are less than one-fourth of the still water depth of the marking point position in the underwater terrain DEM file of at least two periods, it means that the segmentation of the submarine cable route is reasonable and there is no need to re-segment the submarine cable route. Therefore, the terrain annual scouring and silting values ​​of the marking point of each segment can be interpolated by the bilinear interpolation method based on the terrain annual scouring and silting values ​​of the four nodes in the quadrilateral grid where the marking point of each segment is located. Among them, the marking point includes at least one of the starting point, the midpoint and the end point.

[0194] In summary, by comparing the terrain annual scouring and silting values ​​of the four nodes in the quadrilateral grid where the marked point of each segment is located with one-fourth of the still water depth of the marked point position in the underwater terrain DEM file of any two periods in at least two periods, it is determined whether the submarine cable route needs to be re-segmented, and then the terrain annual scouring and silting values ​​of the marked point of each segment are determined according to the terrain annual scouring and silting values ​​of the four nodes in the quadrilateral grid where the marked point of each segment that does not need to be re-segmented is located. In this way, the accuracy of the submarine cable route segmentation is improved, and then the accuracy of the prediction of the suspended section of the submarine cable route is improved.

[0195] In order to implement the above embodiment, the present invention also proposes a device for predicting the suspended section of a submarine cable.

[0196] Figure 6 A schematic structural diagram of a submarine cable suspended section prediction device provided in an embodiment of the present invention.

[0197] like Figure 6 As shown, the submarine cable suspended section prediction device includes: an acquisition module 61, a first determination module 62, a segmentation module 63, a second determination module 64 and a third determination module 65.

[0198] An acquisition module 61 is used to acquire a plurality of information of the sea area in the submarine cable routing area in at least two periods, wherein the plurality of information includes at least one of underwater topographic information, hydrological information and sediment information;

[0199] The first determination module 62 is used to determine the underwater terrain annual scouring and silting DEM file of the sea area in the submarine cable routing area and / or the simulated annual scouring and silting value of each area of ​​the submarine cable routing according to the multiple information of the at least two periods;

[0200] A segmentation module 63, used to segment the submarine cable route to obtain the coordinates of the marking points of each segment, wherein the marking points include at least one of the starting point, the midpoint and the ending point;

[0201] The second determination module 64 is used to determine the terrain annual scouring and silting value of the marking point of each segment according to the coordinates of the marking point of each segment, and according to the underwater terrain annual scouring and silting DEM file of the sea area of ​​the submarine cable routing area and / or the simulated annual scouring and silting value of each area of ​​the submarine cable routing;

[0202] The third determination module 65 is used to compare the annual scouring and silting value of the terrain at the marking point of each segment with the buried depth of the submarine cable to determine the suspended section of the submarine cable.

[0203] Further, in a possible implementation manner of the embodiment of the present invention, the first determining module 62 is configured to:

[0204] Determine the underwater terrain DEM file of the at least two periods according to the plurality of information of the at least two periods;

[0205] According to the difference between the underwater terrain DEM files of any two periods of the at least two periods, obtaining terrain scouring and silting DEM files of the two periods;

[0206] According to the terrain scouring and silting DEM files of the two periods and the time difference between the two periods, the underwater terrain annual scouring and silting DEM files of the sea area in the submarine cable routing area corresponding to each period are obtained.

[0207] Further, in a possible implementation manner of the embodiment of the present invention, the first determining module 62 is configured to:

[0208] Determine the underwater terrain DEM file of the at least two periods according to the plurality of information of the at least two periods;

[0209] The sea area within the underwater terrain DEM file corresponding to each period is meshed by quadrilateral meshing to obtain the underwater terrain DEM file of any quadrilateral network contained in the corresponding period;

[0210] Using the tidal wave model, determine the open sea boundary of the sea area within the scope of the underwater topography DEM file corresponding to each of the said periods;

[0211] According to the offshore opening boundary, annual scouring and silting simulation is performed to obtain simulated annual scouring and silting values ​​of the sea area in the submarine cable routing area corresponding to multiple tidal periods contained in the corresponding period;

[0212] The simulated annual scouring and silting values ​​of each area of ​​the submarine cable route are determined based on the simulated annual scouring and silting values ​​of the sea area in the submarine cable route area corresponding to the multiple tidal periods contained in each of the said periods.

[0213] Further, in a possible implementation of the embodiment of the present invention, the second determining module 64 includes:

[0214] The first positioning unit 641 is used to position the marking point of each segment in the quadrilateral grid in the underwater terrain annual erosion and siltation DEM file of the sea area of ​​the submarine cable routing area corresponding to each period according to the coordinates of the marking point of each segment;

[0215] The determination unit 642 is used to determine the terrain annual scouring and silting value of the marking point of each segment according to the terrain annual scouring and silting values ​​of four nodes in the quadrilateral grid where the marking point of each segment is located.

[0216] Further, in a possible implementation of the embodiment of the present invention, the second determining module 64 includes:

[0217] The second positioning unit 643 is used to position the marking point of each segment in the quadrilateral grid of the sea area simulation result within the range of the underwater terrain DEM file corresponding to each period according to the coordinates of the marking point of each segment;

[0218] The determination unit 642 is used to determine the terrain annual scouring and silting value of the marking point of each segment according to the terrain annual scouring and silting values ​​of four nodes in the quadrilateral grid where the marking point of each segment is located.

[0219] Furthermore, in a possible implementation manner of the embodiment of the present invention, the determining unit 642 is configured to:

[0220] Compare the terrain annual scouring and silting values ​​of four nodes in the quadrilateral grid where the marked point of each segment is located with one quarter of the still water depth of the marked point position in the underwater terrain DEM file of the at least two periods;

[0221] If the annual terrain scouring and silting values ​​of the four nodes in the quadrilateral grid where the marking point of each segment is located exceed one quarter of the still water depth of the marking point position in the underwater terrain DEM file of the at least two periods, the submarine cable route is re-segmented, and the annual terrain scouring and silting values ​​of the four nodes in the quadrilateral grid where the marking point of each segment is located are re-determined;

[0222] If the annual terrain scouring and silting values ​​of the four nodes in the quadrilateral grid where the marking point of each segment is located are less than one-fourth of the still water depth of the marking point position in the underwater terrain DEM file of at least two periods, then the annual terrain scouring and silting values ​​of the marking point of each segment are determined based on the annual terrain scouring and silting values ​​of the four nodes in the quadrilateral grid where the marking point of each segment is located.

[0223] It should be noted that the above explanations of the embodiment of the method for predicting the suspended section of a submarine cable are also applicable to the device for predicting the suspended section of a submarine cable of this embodiment, and will not be repeated here.

[0224] Based on the above embodiments, the present invention also provides a possible implementation method of a submarine cable suspended section prediction device. Figure 7 This is a schematic structural diagram of another submarine cable suspended section prediction device provided in an embodiment of the present invention. Based on the previous embodiment, the submarine cable suspended section prediction device also includes: a fourth determination module 66, a fifth determination module 67 and a sixth determination module 68.

[0225] The fourth determination module 66 is used to determine the first candidate suspended section of the submarine cable according to the underwater terrain annual erosion and siltation DEM file of the sea area in the submarine cable routing area;

[0226] A fifth determination module 67, configured to determine a second candidate suspended section of the submarine cable according to the simulated annual scouring and silting values ​​of each area of ​​the submarine cable route;

[0227] The sixth determination module 68 is used to determine the suspended segment of the submarine cable route according to the segment belonging to the first candidate suspended segment and the second candidate suspended segment.

[0228] In the embodiment of the present invention, by obtaining multiple information of the sea area of ​​the submarine cable routing area in at least two periods, the underwater terrain annual scouring and silting DEM file of the sea area of ​​the submarine cable routing area and / or the simulated annual scouring and silting value of each area of ​​the submarine cable routing are determined according to the multiple information of at least two periods. After the submarine cable routing is segmented to obtain the coordinates of the marking points of each segment, the terrain annual scouring and silting value of the marking point of each segment is determined according to the coordinates of the marking points of each segment, and according to the underwater terrain annual scouring and silting DEM file of the sea area of ​​the submarine cable routing area and / or the simulated annual scouring and silting value of each area of ​​the submarine cable routing, so as to compare the terrain annual scouring and silting value of the marking point of each segment with the buried depth of the submarine cable, and determine the suspended section of the submarine cable. Therefore, by predicting the suspended section of the submarine cable, a basis can be provided for the selection of submarine cable paths, cable selection, and safety assessment of the operation of the suspended section of the submarine cable in operation, so as to avoid the routing of the easily suspended section, reduce unnecessary investment, and reduce the construction cost.

[0229] In order to implement the above embodiments, the present invention also proposes an electronic device, which includes: at least one processor; and a memory communicatively connected to the at least one processor; wherein the memory stores instructions executable by the at least one processor, and the instructions are executed by the at least one processor so that the at least one processor can execute the method for predicting the suspended section of a submarine cable proposed in any of the above embodiments of the present invention.

[0230] Figure 8 A schematic diagram of the structure of an electronic device provided in an embodiment of the present invention can implement the present invention Figure 1-7 The process of the embodiment shown is as follows: Figure 8As shown, the electronic device may include: a shell 81, a processor 82, a memory 83, a circuit board 84 and a power supply circuit 85, wherein the circuit board 84 is arranged inside the space enclosed by the shell 81, and the processor 82 and the memory 83 are arranged on the circuit board 84; the power supply circuit 85 is used to supply power to various circuits or devices of the above-mentioned electronic device; the memory 83 is used to store executable program codes; the processor 82 runs a program corresponding to the executable program code by reading the executable program code stored in the memory 83, so as to execute the method for predicting the suspended section of the submarine cable described in any of the aforementioned embodiments.

[0231] For details on the specific execution process of the above steps by the processor 82 and the steps further executed by the processor 882 by running the executable program code, please refer to the present invention. Figure 1-7 The description of the illustrated embodiment will not be repeated here.

[0232] In order to implement the above embodiments, the present invention further proposes a computer-readable storage medium storing computer instructions, wherein the computer instructions are used to enable the computer to execute the method for predicting the suspended section of a submarine cable proposed in any of the above embodiments of the present invention.

[0233] In order to implement the above embodiments, the present invention further proposes a computer program product, including a computer program, which, when executed by a processor, implements the method for predicting the suspended section of a submarine cable proposed in any of the above embodiments of the present invention.

[0234] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0235] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0236] Any process or method description in a flowchart or otherwise described herein may be understood to represent a module, segment or portion of code comprising one or more executable instructions for implementing the steps of a custom logical function or process, and the scope of the preferred embodiments of the present invention includes alternative implementations in which functions may not be performed in the order shown or discussed, including performing functions in a substantially simultaneous manner or in reverse order depending on the functions involved, which should be understood by technicians in the technical field to which the embodiments of the present invention belong.

[0237] The logic and / or steps represented in the flowchart or otherwise described herein, for example, can be considered as an ordered list of executable instructions for implementing logical functions, and can be embodied in any computer-readable medium for use by an instruction execution system, device or apparatus (such as a computer-based system, a system including a processor, or other system that can fetch instructions from an instruction execution system, device or apparatus and execute the instructions), or in combination with these instruction execution systems, devices or apparatuses. For the purpose of this specification, "computer-readable medium" can be any device that can contain, store, communicate, propagate or transmit a program for use by an instruction execution system, device or apparatus, or in combination with these instruction execution systems, devices or apparatuses. More specific examples of computer-readable media (a non-exhaustive list) include the following: an electrical connection with one or more wires (electronic device), a portable computer disk box (magnetic device), a random access memory (RAM), a read-only memory (ROM), an erasable and programmable read-only memory (EPROM or flash memory), a fiber optic device, and a portable compact disk read-only memory (CDROM). In addition, the computer-readable medium may even be paper or other suitable medium on which the program is printed, since the program may be obtained electronically, for example, by optically scanning the paper or other medium and then editing, interpreting or processing in other suitable ways if necessary, and then stored in a computer memory.

[0238] It should be understood that the various parts of the present invention can be implemented by hardware, software, firmware or a combination thereof. In the above-mentioned embodiments, a plurality of steps or methods can be implemented by software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if implemented by hardware, as in another embodiment, it can be implemented by any one of the following technologies known in the art or their combination: a discrete logic circuit having a logic gate circuit for implementing a logic function for a data signal, a dedicated integrated circuit having a suitable combination of logic gate circuits, a programmable gate array (PGA), a field programmable gate array (FPGA), etc.

[0239] A person skilled in the art may understand that all or part of the steps in the method for implementing the above-mentioned embodiment may be completed by instructing related hardware through a program, and the program may be stored in a computer-readable storage medium, which, when executed, includes one or a combination of the steps of the method embodiment.

[0240] In addition, each functional unit in each embodiment of the present invention may be integrated into a processing module, or each unit may exist physically separately, or two or more units may be integrated into one module. The above-mentioned integrated module may be implemented in the form of hardware or in the form of a software functional module. If the integrated module is implemented in the form of a software functional module and sold or used as an independent product, it may also be stored in a computer-readable storage medium.

[0241] The storage medium mentioned above may be a read-only memory, a magnetic disk or an optical disk, etc. Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limiting the present invention. A person of ordinary skill in the art may change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A method for predicting the suspended section of a submarine cable, characterized in that: The following steps are involved: Acquire multiple information of the sea area in the submarine cable routing area for at least two periods, wherein the multiple information includes at least one of underwater topography information, hydrological information, and sediment information; Determine, based on the plurality of information of the at least two periods, a DEM file of underwater terrain annual scouring and silting of the sea area in the submarine cable route area, and / or simulated annual scouring and silting values ​​of each area of ​​the submarine cable route; Divide the submarine cable route into segments to obtain the coordinates of the marking points of each segment, wherein the marking points include at least one of a starting point, a midpoint and an ending point; Determine the terrain annual scouring and silting value of the marking point of each segment according to the coordinates of the marking point of each segment, and according to the underwater terrain annual scouring and silting DEM file of the sea area of ​​the submarine cable routing area and / or the simulated annual scouring and silting value of each area of ​​the submarine cable routing; The annual scouring and silting value of the terrain at the marking point of each segment is compared with the buried depth of the submarine cable to determine the suspended section of the submarine cable.

2. The method according to claim 1, characterized in that Determining the underwater terrain annual scouring and silting DEM file of the sea area in the submarine cable routing area and / or the simulated annual scouring and silting values ​​of each area of ​​the submarine cable routing according to the multiple information of the at least two periods includes: Determine the underwater terrain DEM file of the at least two periods according to the plurality of information of the at least two periods; According to the difference between the underwater terrain DEM files of any two periods of the at least two periods, obtaining terrain scouring and silting DEM files of the two periods; According to the terrain scouring and silting DEM files of the two periods and the time difference between the two periods, the underwater terrain annual scouring and silting DEM files of the sea area in the submarine cable routing area corresponding to each period are obtained.

3. The method according to claim 1, characterized in that Determining the underwater terrain annual scouring and silting DEM file of the sea area in the submarine cable routing area according to the underwater terrain information of the at least two periods, and / or the simulated annual scouring and silting values ​​of each area of ​​the submarine cable routing, includes: Determine the underwater terrain DEM file of the at least two periods according to the plurality of information of the at least two periods; The sea area within the underwater terrain DEM file corresponding to each period is meshed by quadrilateral meshing to obtain the underwater terrain DEM file of any quadrilateral network contained in the corresponding period; Using the tidal wave model, determine the open sea boundary of the sea area within the scope of the underwater topography DEM file corresponding to each of the said periods; According to the offshore opening boundary, annual scouring and silting simulation is performed to obtain simulated annual scouring and silting values ​​of the sea area in the submarine cable routing area corresponding to multiple tidal periods contained in the corresponding period; The simulated annual scouring and silting values ​​of each area of ​​the submarine cable route are determined based on the simulated annual scouring and silting values ​​of the sea area in the submarine cable route area corresponding to the multiple tidal periods contained in each of the said periods.

4. The method according to claim 2, characterized in that: Determining the terrain annual scouring and silting value of the marking point of each segment according to the coordinates of the marking point of each segment, and according to the underwater terrain annual scouring and silting DEM file of the sea area of ​​the submarine cable routing area and / or the simulated annual scouring and silting value of each area of ​​the submarine cable routing, comprises: According to the coordinates of the marking points of each segment, the marking points of each segment are respectively located in the quadrilateral grids in the underwater terrain annual scouring and silting DEM file of the sea area of ​​the submarine cable routing area corresponding to each period; The terrain annual scouring and silting value of the marking point of each segment is determined according to the terrain annual scouring and silting values ​​of four nodes in the quadrilateral grid where the marking point of each segment is located.

5. The method according to claim 3, characterized in that: Determining the terrain annual scouring and silting value of the marking point of each segment according to the coordinates of the marking point of each segment, and according to the underwater terrain annual scouring and silting DEM file of the sea area of ​​the submarine cable routing area and / or the simulated annual scouring and silting value of each area of ​​the submarine cable routing, comprises: According to the coordinates of the marking points of each segment, the marking points of each segment are respectively located in the quadrilateral grids in the sea area simulation results within the range of the underwater terrain DEM file corresponding to each period; The terrain annual scouring and silting value of the marking point of each segment is determined according to the terrain annual scouring and silting values ​​of four nodes in the quadrilateral grid where the marking point of each segment is located.

6. The method according to claim 4 or 5, characterized in that: Determining the terrain annual scouring and silting value of the marking point of each segment according to the terrain annual scouring and silting values ​​of four nodes in the quadrilateral grid where the marking point of each segment is located includes: Compare the terrain annual scouring and silting values ​​of four nodes in the quadrilateral grid where the marked point of each segment is located with one quarter of the still water depth of the marked point position in the underwater terrain DEM file of the at least two periods; If the annual terrain scouring and silting values ​​of the four nodes in the quadrilateral grid where the marking point of each segment is located exceed one quarter of the still water depth of the marking point position in the underwater terrain DEM file of the at least two periods, the submarine cable route is re-segmented, and the annual terrain scouring and silting values ​​of the four nodes in the quadrilateral grid where the marking point of each segment is located are re-determined; If the annual terrain scouring and silting values ​​of the four nodes in the quadrilateral grid where the marking point of each segment is located are less than one-fourth of the still water depth of the marking point position in the underwater terrain DEM file of at least two periods, then the annual terrain scouring and silting values ​​of the marking point of each segment are determined based on the annual terrain scouring and silting values ​​of the four nodes in the quadrilateral grid where the marking point of each segment is located.

7. The method according to any one of claims 1 to 5, characterized in that: After comparing the annual scouring and silting value of the terrain at the marking point of each segment with the buried depth of the submarine cable to determine the suspended section of the submarine cable, the method further includes: According to the underwater terrain annual erosion and siltation DEM file of the sea area where the submarine cable is routed, determine the first candidate suspended section of the submarine cable; Determine the second candidate suspended section of the submarine cable according to the simulated annual scouring and silting values ​​of each area of ​​the submarine cable route; The suspended segment of the submarine cable route is determined according to the segments belonging to the first candidate suspended segment and the second candidate suspended segment.

8. A device for predicting the suspended section of a submarine cable, characterized in that: include: An acquisition module, used to acquire multiple information of the sea area in the submarine cable routing area in at least two periods, wherein the multiple information includes at least one of underwater topography information, hydrological information and sediment information; A first determination module is used to determine the underwater terrain annual scouring and silting DEM file of the sea area in the submarine cable routing area and / or the simulated annual scouring and silting value of each area of ​​the submarine cable routing according to the multiple information of the at least two periods; A segmentation module, used to segment the submarine cable route to obtain the coordinates of the marking points of each segment, wherein the marking points include at least one of a starting point, a midpoint and an ending point; The second determination module is used to determine the terrain annual scouring and silting value of the marking point of each segment according to the coordinates of the marking point of each segment, and according to the underwater terrain annual scouring and silting DEM file of the sea area of ​​the submarine cable routing area and / or the simulated annual scouring and silting value of each area of ​​the submarine cable routing; The third determination module is used to compare the annual scouring and silting value of the terrain at the marking point of each segment with the buried depth of the submarine cable to determine the suspended section of the submarine cable.

9. The device according to claim 8, characterized in that The first determining module is used to: Determine the underwater terrain DEM file of the at least two periods according to the plurality of information of the at least two periods; According to the difference between the underwater terrain DEM files of any two periods of the at least two periods, obtaining terrain scouring and silting DEM files of the two periods; According to the terrain scouring and silting DEM files of the two periods and the time difference between the two periods, the underwater terrain annual scouring and silting DEM files of the sea area in the submarine cable routing area corresponding to each period are obtained.

10. The device according to claim 8, characterized in that The first determining module is used to: Determine the underwater terrain DEM file of the at least two periods according to the plurality of information of the at least two periods; The sea area within the underwater terrain DEM file corresponding to each period is meshed by quadrilateral meshing to obtain the underwater terrain DEM file of any quadrilateral network contained in the corresponding period; Using the tidal wave model, determine the open sea boundary of the sea area within the scope of the underwater topography DEM file corresponding to each of the said periods; According to the offshore opening boundary, annual scouring and silting simulation is performed to obtain simulated annual scouring and silting values ​​of the sea area in the submarine cable routing area corresponding to multiple tidal periods contained in the corresponding period; The simulated annual scouring and silting values ​​of each area of ​​the submarine cable route are determined based on the simulated annual scouring and silting values ​​of the sea area in the submarine cable route area corresponding to the multiple tidal periods contained in each of the said periods.

11. The device according to claim 9, characterized in that The second determining module includes: The first positioning unit is used to position the marking point of each segment in the quadrilateral grid in the underwater terrain annual scouring and silting DEM file of the sea area of ​​the submarine cable routing area corresponding to each period according to the coordinates of the marking point of each segment; The determination unit is used to determine the terrain annual scouring and silting value of the marking point of each segment according to the terrain annual scouring and silting values ​​of four nodes in the quadrilateral grid where the marking point of each segment is located.

12. The device according to claim 10, characterized in that The second determining module includes: A second positioning unit is used to position the marking points of each segment in the quadrilateral grid of the sea area simulation result within the range of the underwater terrain DEM file corresponding to each period according to the coordinates of the marking points of each segment; The determination unit is used to determine the terrain annual scouring and silting value of the marking point of each segment according to the terrain annual scouring and silting values ​​of four nodes in the quadrilateral grid where the marking point of each segment is located.

13. The device according to claim 11 or 12, characterized in that The determining unit is used for: Compare the terrain annual scouring and silting values ​​of four nodes in the quadrilateral grid where the marked point of each segment is located with one quarter of the still water depth of the marked point position in the underwater terrain DEM file of the at least two periods; If the annual terrain scouring and silting values ​​of the four nodes in the quadrilateral grid where the marking point of each segment is located exceed one quarter of the still water depth of the marking point position in the underwater terrain DEM file of the at least two periods, the submarine cable route is re-segmented, and the annual terrain scouring and silting values ​​of the four nodes in the quadrilateral grid where the marking point of each segment is located are re-determined; If the annual terrain scouring and silting values ​​of the four nodes in the quadrilateral grid where the marking point of each segment is located are less than one-fourth of the still water depth of the marking point position in the underwater terrain DEM file of at least two periods, then the annual terrain scouring and silting values ​​of the marking point of each segment are determined based on the annual terrain scouring and silting values ​​of the four nodes in the quadrilateral grid where the marking point of each segment is located.

14. The device according to any one of claims 8 to 12, characterized in that: The device further comprises: The fourth determination module is used to determine the first candidate suspended section of the submarine cable according to the underwater terrain annual erosion and siltation DEM file of the sea area in the submarine cable routing area; A fifth determination module is used to determine the second candidate suspended section of the submarine cable according to the simulated annual scouring and silting values ​​of each area of ​​the submarine cable route; The sixth determination module is used to determine the suspended segment of the submarine cable route according to the segment belonging to the first candidate suspended segment and the second candidate suspended segment.

15. An electronic device, comprising: at least one processor; as well as a memory communicatively connected to the at least one processor; wherein, The memory stores instructions that can be executed by the at least one processor, and the instructions are executed by the at least one processor to enable the at least one processor to perform the method according to any one of claims 1 to 7.

16. A non-transitory computer-readable storage medium storing computer instructions, wherein: The computer instructions are used to cause the computer to execute the method according to any one of claims 1 to 7.

17. A computer program product, comprising a computer program, wherein when the computer program is executed by a processor, the computer program implements the method according to any one of claims 1 to 7.

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