Method, device, medium and equipment for determining submarine cable burial depth

Abstract

The present disclosure relates to a method, device, medium and equipment for determining the burial depth of a submarine cable, and relates to the technical field of ocean engineering. The method comprises: obtaining a first magnetic field intensity of a submarine cable at a first current signal frequency and a second magnetic field intensity of the submarine cable at a second current signal frequency; determining a detection distance according to a magnetic field ratio between the first magnetic field intensity and the second magnetic field intensity; and determining the burial depth of the submarine cable according to the detection distance. By using the method, the burial depth of the submarine cable can be determined with higher precision.

Description

Technical Field

[0001] This disclosure relates to the field of marine engineering technology, specifically to a method, apparatus, medium, and equipment for determining the burial depth of submarine cables. Background Technology

[0002] Submarine cables are typically buried several meters below the seabed for submarine power transmission and communication. The current-carrying conductors within the cable carry the current. Since submarine cables can range in length from a few kilometers to over ten kilometers, the magnetic field generated by these conductors can be modeled as the magnetic field of a long straight conductor. Therefore, according to the Biot-Savart law, the magnitude of the magnetic field at any point around the cable can be determined.

[0003] Based on this, related technologies have proposed methods to detect the magnetic field generated by submarine cables and, combined with geometric algorithms, determine the burial depth of the cables. However, current methods contain some errors in determining the burial depth of submarine cables. Summary of the Invention

[0004] The purpose of this disclosure is to provide a method, apparatus, medium, and equipment for determining the burial depth of submarine cables, so as to determine the burial depth of submarine cables with higher accuracy.

[0005] To achieve the above objectives, according to a first aspect of the present disclosure, a method for determining the burial depth of a submarine cable is provided, comprising:

[0006] The first magnetic field strength of the submarine cable at the first current signal frequency and the second magnetic field strength at the second current signal frequency are obtained.

[0007] The detection distance is determined based on the magnetic field ratio between the first magnetic field strength and the second magnetic field strength.

[0008] The burial depth of the submarine cable is determined based on the detection distance.

[0009] Optionally, the detection distance is determined by the following formula:

[0010] ;

[0011] in, This represents the strength of the first magnetic field. This indicates the strength of the second magnetic field; This represents the first seawater propagation parameter corresponding to the frequency of the first current signal. This represents the second seawater propagation parameter corresponding to the frequency of the second current signal; Indicates the detection distance; This represents a first-order Bessel function of the second kind.

[0012] Optionally, the method further includes:

[0013] The height of the detection point relative to the seabed is obtained to detect the magnetic field strength of the submarine cable.

[0014] Determining the burial depth of the submarine cable based on the detection distance includes:

[0015] The burial depth of the submarine cable is determined based on the detection distance and the height of the detection point relative to the seabed.

[0016] Optionally, the method further includes:

[0017] Determine the target detection point for detecting the magnetic field strength of the submarine cable;

[0018] The target detection point is located above the submarine cable, and the magnetic field strength of the target detection point is greater than that of other detection points on the same horizontal plane.

[0019] Optionally, the magnetic field strength of the submarine cable is measured by a fluxgate sensor.

[0020] Optionally, the submarine cable is a three-core submarine cable or a single-core submarine cable.

[0021] Optionally, the frequency of the first current signal is 50Hz, and the frequency of the second current signal is 5kHz.

[0022] According to a second aspect of the present disclosure, a device for determining the burial depth of a submarine cable is provided, the device comprising:

[0023] The acquisition module is used to acquire the first magnetic field strength of the submarine cable at the first current signal frequency and the second magnetic field strength at the second current signal frequency.

[0024] The first determining module is used to determine the detection distance based on the magnetic field ratio between the first magnetic field strength and the second magnetic field strength;

[0025] The second determining module is used to determine the burial depth of the submarine cable based on the detection distance.

[0026] According to a third aspect of the present disclosure, a non-transitory computer-readable storage medium is provided, on which a computer program is stored, which, when executed by a processor, implements the steps of the method described in any of the first aspects above.

[0027] According to a fourth aspect of the present disclosure, an electronic device is provided, comprising:

[0028] A memory on which computer programs are stored;

[0029] A processor for executing the computer program in the memory to implement the steps of the method described in any of the first aspects above.

[0030] Because the magnetic fields generated by submarine cables at different current signal frequencies experience varying degrees of shielding when propagating in seawater, the magnetic field ratio reflecting the seawater shielding effect can be determined by acquiring the first magnetic field strength of the submarine cable at the first current signal frequency and the second magnetic field strength at the second current signal frequency. Based on this, the detection distance for the submarine cable can be determined using the magnetic field ratio, and further, the burial depth of the submarine cable can be determined. This reduces the impact of the seawater shielding effect on detection and improves the accuracy of the determined submarine cable burial depth. Furthermore, this solution eliminates the need for multiple magnetic sensors, effectively reducing cost and operational complexity.

[0031] Other features and advantages of this disclosure will be described in detail in the following detailed description section. Attached Figure Description

[0032] The accompanying drawings are provided to further illustrate the present disclosure and form part of the specification. They are used together with the following detailed description to explain the present disclosure, but do not constitute a limitation thereof. In the drawings:

[0033] Figure 1 This is a flowchart illustrating an exemplary embodiment of the present disclosure of a method for determining the burial depth of a submarine cable.

[0034] Figure 2 This is a schematic diagram illustrating the variation of magnetic field strength with detection distance under different current signal frequencies, as shown in an exemplary embodiment of this disclosure.

[0035] Figure 3 This is a schematic diagram illustrating the variation of a magnetic field ratio with detection distance, as shown in an exemplary embodiment of this disclosure.

[0036] Figure 4 This is a flowchart illustrating a method for determining the burial depth of a submarine cable, as shown in another exemplary embodiment of this disclosure.

[0037] Figure 5 This is a block diagram illustrating an exemplary embodiment of a submarine cable burial depth determination device.

[0038] Figure 6 This is a block diagram illustrating an electronic device according to an exemplary embodiment of the present disclosure. Detailed Implementation

[0039] The specific embodiments of this disclosure will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit this disclosure.

[0040] As mentioned in the background section, related technologies propose methods to detect the magnetic field generated by submarine cables and determine their burial depth using geometric algorithms. However, current methods do not consider the shielding effect of seawater on the magnetic field, resulting in some errors in the determined cable burial depth.

[0041] For example, the patent application with application number 201911207567.5 proposes to use a towed body on the water surface to carry a vector fluxgate magnetometer, so as to calculate the burial depth of the submarine cable based on the magnetic field data of two points during the towing process and a geometric algorithm. However, this method requires the towed body to move, making it impossible to perform fixed-point measurements, and the towed body's movement is subject to attitude interference, which generates noise and affects the measurement accuracy.

[0042] The patent application with application number 202011407299.4 proposes to use two coil devices placed one above the other to measure the gradient magnetic field data generated by the submarine cable, and then calculate the burial depth of the submarine cable using a geometric algorithm. However, this approach has three drawbacks: first, it requires two sensor devices, increasing costs; second, it does not consider the shielding effect of seawater on the magnetic field, resulting in errors in the measured burial depth; and third, it cannot measure DC submarine cables.

[0043] Patent application number 201220267984.6 proposes a handheld measuring device for measuring the burial depth of submarine cables at the landing section. This device uses multiple magnetic field sensors mounted on its bottom to differentiate the mutual influence between the three-phase cables. However, this solution has three drawbacks: first, it requires multiple sensor devices, increasing costs; second, the handheld form factor cannot measure the burial depth of submarine cables outside the landing section; and third, because the submarine cables at the landing section are relatively close together, mutual inductance effects exist, affecting measurement accuracy.

[0044] The patent application with application number 202010441672.1 proposes to use two fluxgate magnetometers on a horizontal plane to measure the magnetic field generated by the submarine cable, and then calculate the burial depth of the cable using a geometric algorithm. However, this approach has two drawbacks: first, it requires two fluxgate sensors, increasing costs; second, it does not consider the shielding effect of seawater on the magnetic field, resulting in errors in the measured burial depth.

[0045] In view of this, this disclosure proposes a method, apparatus, medium, and device for determining the burial depth of submarine cables. Considering that the magnetic fields generated by the submarine cable at different current signal frequencies experience varying degrees of shielding when propagating in seawater, the method determines a magnetic field ratio reflecting the seawater shielding effect by acquiring the first magnetic field strength of the submarine cable at a first current signal frequency and the second magnetic field strength at a second current signal frequency. Based on this, the detection distance for the submarine cable can be determined using the magnetic field ratio, and the burial depth of the submarine cable can be further determined. This reduces the impact of the seawater shielding effect on detection and improves the accuracy of the determined burial depth of the submarine cable. Furthermore, the technical solution provided by this disclosure eliminates the need for multiple magnetic sensors, effectively reducing cost and operational complexity.

[0046] Figure 1 This is a flowchart illustrating an exemplary embodiment of the present disclosure of a method for determining the burial depth of a submarine cable. Figure 1 As shown, the method for determining the burial depth of a submarine cable may include steps S101 to S103.

[0047] In step S101, the first magnetic field strength of the submarine cable at the first current signal frequency and the second magnetic field strength at the second current signal frequency are obtained.

[0048] The submarine cable can be a three-core or a single-core cable. The magnetic field strength of the submarine cable can be detected by a magnetic sensor, such as a fluxgate magnetometer. Furthermore, the first and second magnetic field strengths can be data acquired by the magnetic sensor or manually input data.

[0049] In step S102, the detection distance is determined based on the magnetic field ratio between the first magnetic field strength and the second magnetic field strength.

[0050] It should be noted that, based on the Biot-Savart law, the ratio between the first magnetic field strength at the first current signal frequency and the second magnetic field strength at the second current signal frequency can be determined, and its correlation with the detection distance can be established. This allows us to obtain the correspondence between the magnetic field ratio and the detection distance. Based on this correspondence, the detection distance corresponding to the magnetic field ratio can be determined.

[0051] In step S103, the burial depth of the submarine cable is determined based on the detection distance.

[0052] It is easy to understand that the burial depth of the submarine cable can be determined based on the detection distance.

[0053] In one possible implementation, the technical solution provided in this disclosure may further include: obtaining the height of the detection point relative to the seabed for detecting the magnetic field strength of the submarine cable.

[0054] The height of the detection point relative to the seabed can be measured using an altimeter installed at the detection point. This height can be obtained from the altimeter or manually entered data.

[0055] Based on this, step S103 above may include:

[0056] The burial depth of the submarine cable is determined based on the detection distance and the height of the detection point relative to the seabed.

[0057] For example, the detection distance is R, and the height of the detection point relative to the seabed is H. Based on this, the burial depth of the submarine cable is (RH).

[0058] In this embodiment of the disclosure, the magnitude of the magnetic field at any point around the submarine cable can be determined according to the Biot-Savart law. Based on this, assuming the submarine cable is infinitely long, a simplified formula 1 can be obtained.

[0059] (Formula 1)

[0060] in, This indicates the magnitude of the magnetic field at the detection points around the submarine cable. Represents the permeability of free space. This indicates the magnitude of the current in the submarine cable. This indicates the vertical distance from the detection point to the submarine cable, also known as the detection distance.

[0061] In this embodiment of the disclosure, when the magnetic field signal propagates in seawater, the actual magnetic field strength generated by the submarine cable can be determined by formula 2 because seawater has a certain shielding effect on the signal.

[0062] (Formula 2)

[0063] in, Indicates the parameters of seawater propagation. This represents a first-order Bessel function of the second kind.

[0064] Understandably, seawater propagation parameters It can be determined using formula 3.

[0065] (Formula 3)

[0066] in, Represents the imaginary unit. This indicates the frequency of the current signal in the submarine cable. Indicates the magnetic permeability of seawater. This represents the dielectric constant of seawater.

[0067] It is easy to understand that the magnetic field generated by the submarine cable at different current signal frequencies is shielded to varying degrees when propagating in seawater, resulting in different magnetic field strengths detected at the same detection point.

[0068] Optionally, when the current in the submarine cable is 50A, the frequency of the first current signal is 50Hz, and the frequency of the second current signal is 5kHz, the result can be obtained based on the above formulas 2 and 3. Figure 2 The curves showing the change of magnetic field strength with detection distance under different current signal frequencies are shown. Based on this, the corresponding detection distance can be determined according to the detected magnetic field strength.

[0069] In one possible implementation, the magnetic field signals measured at the same detection distance but with different current signal frequencies are divided, and the current parameters are... The magnetic field ratio is eliminated, thus we can obtain the equation characterizing the relationship between the magnetic field ratio and the detection distance, which is Equation 4.

[0070] (Formula 4)

[0071] in, Indicates the first magnetic field strength. Indicates the strength of the second magnetic field; This represents the first seawater propagation parameter corresponding to the frequency of the first current signal. The second seawater propagation parameter corresponds to the frequency of the second current signal. Indicates the detection range; This represents a first-order Bessel function of the second kind.

[0072] Based on Formula 4, we can obtain... Figure 3 The diagram illustrates how the magnetic field ratio changes with the detection distance. Based on this, the corresponding detection distance can be determined according to the calculated magnetic field ratio, and further, the burial depth of the submarine cable can be determined.

[0073] For example, by changing the frequency of the current signal applied inside the submarine cable, the magnetic field strength data at different current signal frequencies can be determined, thereby obtaining the corresponding magnetic field ratio. Based on this, it can be queried... Figure 3 The curve shown yields the detection distance corresponding to the magnetic field ratio, and further determines the burial depth of the submarine cable.

[0074] It is worth noting that the embodiments of this disclosure utilize the varying shielding effects of seawater on the magnetic field generated by the submarine cable at different current signal frequencies to calculate the cable burial depth, eliminating the shortcomings of traditional detection methods and resulting in higher accuracy in detecting cable burial depth. Furthermore, the technical solution provided by these embodiments eliminates the need for multiple magnetic sensors, effectively reducing cost and operational complexity. Additionally, the technical solution provided by these embodiments can be used for underwater measurements, enabling the measurement of most submarine cable burial depths, thus demonstrating wide applicability.

[0075] It should also be noted that the magnetic field strength of a submarine cable can be measured at a fixed point, or a target detection point for probing the magnetic field strength of the cable can be determined using the peak value method. In one possible implementation, since the magnetic field strength directly above the cable is often greater than that at other locations on the same horizontal plane, a fixed-point measurement can be performed directly above the cable, or a target detection point can be determined above the cable where the magnetic field strength is greater than that at other detection points on the same horizontal plane.

[0076] In one embodiment, given the location of the submarine cable, a magnetic sensor can be positioned directly above the cable to detect the magnetic field strength of the cable at different current signal frequencies.

[0077] In another embodiment, the cable's direction is known. A magnetic sensor can be moved along a direction perpendicular to the cable's direction on the same horizontal plane, and the point where the detected magnetic field strength is strongest can be used as the target detection point. For example, as the magnetic sensor gradually approaches the cable from a distance, the detected signal increases in strength, reaching an extreme value when directly above the cable. Conversely, as the magnetic sensor moves away from the cable, the detected signal decreases in strength until it disappears. Throughout the detection process, the detected magnetic field strength changes with the position of the magnetic sensor, exhibiting a peak, with the peak point corresponding to the point of maximum magnetic field strength. Based on this, the point corresponding to the peak point can be used as the target detection point.

[0078] Figure 4 This is a flowchart illustrating a method for determining the burial depth of a submarine cable, as shown in another exemplary embodiment of this disclosure. Figure 4 As shown, the method for determining the burial depth of submarine cables provided in this embodiment may include steps S401 to S404.

[0079] In step S401, the target detection point is determined.

[0080] The target detection point is located above the submarine cable, and the magnetic field strength of the target detection point is greater than that of other detection points on the same horizontal plane.

[0081] In step S402, the first magnetic field strength of the submarine cable at the first current signal frequency and the second magnetic field strength at the second current signal frequency are obtained.

[0082] In step S403, the detection distance is determined based on the magnetic field ratio between the first magnetic field strength and the second magnetic field strength.

[0083] In step S404, the burial depth of the submarine cable is determined based on the detection distance.

[0084] The technical solution provided in this disclosure takes into account the varying degrees of shielding experienced by the magnetic fields generated by the submarine cable at different current signal frequencies as they propagate in seawater. By acquiring the first magnetic field strength of the submarine cable at the first current signal frequency and the second magnetic field strength at the second current signal frequency, a magnetic field ratio reflecting the seawater shielding effect is determined. Based on this, the detection distance for the submarine cable can be determined using the magnetic field ratio, and further, the burial depth of the submarine cable can be determined. This reduces the impact of the seawater shielding effect on detection and improves the accuracy of the determined submarine cable burial depth. Furthermore, the technical solution provided in this disclosure eliminates the need for multiple magnetic sensors, effectively reducing cost and operational complexity.

[0085] Based on the same inventive concept, this disclosure also provides a submarine cable burial depth determination device, which can be used to perform all or part of the steps of the submarine cable burial depth determination method provided in the above method embodiments. The submarine cable burial depth determination device can implement the submarine cable burial depth determination method in software, hardware or a combination of both. Figure 5 This is a block diagram illustrating a submarine cable burial depth determination device 500 according to an exemplary embodiment of this disclosure. (Refer to...) Figure 5 The submarine cable burial depth determination device 500 includes an acquisition module 501, a first determination module 502, and a second determination module 503.

[0086] The acquisition module 501 is used to acquire the first magnetic field strength of the submarine cable at the first current signal frequency and the second magnetic field strength at the second current signal frequency.

[0087] The first determining module 502 is used to determine the detection distance based on the magnetic field ratio between the first magnetic field strength and the second magnetic field strength;

[0088] The second determining module 503 is used to determine the burial depth of the submarine cable based on the detection distance.

[0089] The technical solution provided in this disclosure takes into account the varying degrees of shielding experienced by the magnetic fields generated by the submarine cable at different current signal frequencies as they propagate in seawater. By acquiring the first magnetic field strength of the submarine cable at the first current signal frequency and the second magnetic field strength at the second current signal frequency, a magnetic field ratio reflecting the seawater shielding effect is determined. Based on this, the detection distance for the submarine cable can be determined using the magnetic field ratio, and further, the burial depth of the submarine cable can be determined. This reduces the impact of the seawater shielding effect on detection and improves the accuracy of the determined submarine cable burial depth. Furthermore, the technical solution provided in this disclosure eliminates the need for multiple magnetic sensors, effectively reducing cost and operational complexity.

[0090] In one embodiment, the detection distance is determined by the following formula:

[0091] ;

[0092] in, This represents the strength of the first magnetic field. This indicates the strength of the second magnetic field; This represents the first seawater propagation parameter corresponding to the frequency of the first current signal. This represents the second seawater propagation parameter corresponding to the frequency of the second current signal; Indicates the detection distance; This represents a first-order Bessel function of the second kind.

[0093] In one embodiment, the submarine cable burial depth determination device 500 further includes an acquisition submodule, which is used to acquire the height of the detection point relative to the seabed for detecting the magnetic field strength of the submarine cable.

[0094] Based on this, the second determining module 503 is used to: determine the burial depth of the submarine cable according to the detection distance and the height of the detection point relative to the seabed.

[0095] In one embodiment, the submarine cable burial depth determination device 500 further includes a third determination module, which is used to: determine a target detection point for detecting the magnetic field strength of the submarine cable;

[0096] The target detection point is located above the submarine cable, and the magnetic field strength of the target detection point is greater than that of other detection points on the same horizontal plane.

[0097] In one embodiment, the magnetic field strength of the submarine cable is measured by a fluxgate sensor.

[0098] In one embodiment, the submarine cable is a three-core submarine cable or a single-core submarine cable.

[0099] In one embodiment, the frequency of the first current signal is 50Hz and the frequency of the second current signal is 5kHz.

[0100] Regarding the submarine cable burial depth determination device 500 in the above embodiments, the specific methods by which each module performs its operation have been described in detail in the embodiments related to the method, and will not be elaborated here.

[0101] Figure 6 This is a block diagram illustrating an electronic device 600 according to an exemplary embodiment. For example... Figure 6 As shown, the electronic device 600 may include a processor 601 and a memory 602. The electronic device 600 may also include one or more of a multimedia component 603, an input / output (I / O) interface 604, and a communication component 605.

[0102] The processor 601 controls the overall operation of the electronic device 600 to complete all or part of the steps in the above-described method for determining the burial depth of submarine cables. The memory 602 stores various types of data to support the operation of the electronic device 600. This data may include, for example, instructions for any application or method operating on the electronic device 600, and application-related data such as contact data, sent and received messages, pictures, audio, video, etc. The memory 602 can be implemented by any type of volatile or non-volatile storage device or a combination thereof, such as Static Random Access Memory (SRAM), Electrically Erasable Programmable Read-Only Memory (EEPROM), Erasable Programmable Read-Only Memory (EPROM), Programmable Read-Only Memory (PROM), Read-Only Memory (ROM), magnetic storage, flash memory, magnetic disk, or optical disk. The multimedia component 603 may include a screen and audio components. The screen may be, for example, a touchscreen, and the audio component is used to output and / or input audio signals. For example, the audio component may include a microphone for receiving external audio signals. The received audio signals may be further stored in memory 602 or transmitted via communication component 605. The audio component also includes at least one speaker for outputting audio signals. I / O interface 604 provides an interface between processor 601 and other interface modules, such as a keyboard, mouse, buttons, etc. These buttons may be virtual or physical buttons. Communication component 605 is used for wired or wireless communication between the electronic device 600 and other devices. Wireless communication, such as Wi-Fi, Bluetooth, Near Field Communication (NFC), 2G, 3G, 4G, NB-IoT, eMTC, or other 5G technologies, or combinations thereof, is not limited here. Therefore, the corresponding communication component 605 may include: a Wi-Fi module, a Bluetooth module, an NFC module, etc.

[0103] In an exemplary embodiment, the electronic device 600 may be implemented by one or more application-specific integrated circuits (ASICs), digital signal processors (DSPs), digital signal processing devices (DSPDs), programmable logic devices (PLDs), field-programmable gate arrays (FPGAs), controllers, microcontrollers, microprocessors, or other electronic components to perform the above-described method for determining the burial depth of submarine cables.

[0104] In another exemplary embodiment, a computer-readable storage medium including program instructions is also provided, which, when executed by a processor, implement the steps of the above-described method for determining the burial depth of a submarine cable. For example, the computer-readable storage medium may be the memory 602 including the program instructions, which may be executed by the processor 601 of the electronic device 600 to complete the above-described method for determining the burial depth of a submarine cable.

[0105] In another exemplary embodiment, a computer program product is also provided, which includes a computer program executable by a programmable device, the computer program having a code portion for performing the above-described method for determining the burial depth of a submarine cable when executed by the programmable device.

[0106] The preferred embodiments of this disclosure have been described in detail above with reference to the accompanying drawings. However, this disclosure is not limited to the specific details of the above embodiments. Within the scope of the technical concept of this disclosure, various simple modifications can be made to the technical solutions of this disclosure, and these simple modifications all fall within the protection scope of this disclosure.

[0107] It should also be noted that the various specific technical features described in the above embodiments can be combined in any suitable manner without contradiction. To avoid unnecessary repetition, this disclosure will not describe the various possible combinations separately.

[0108] Furthermore, various different embodiments of this disclosure can be combined in any way, as long as they do not violate the spirit of this disclosure, they should also be regarded as the content disclosed in this disclosure.

Claims

1. A method for determining the burial depth of a submarine cable, characterized in that, The method includes: A target detection point is determined, wherein the target detection point is located above the submarine cable, and the magnetic field strength of the target detection point is greater than the magnetic field strength of other detection points on the same horizontal plane; At the target detection point, the first magnetic field strength of the submarine cable at the first current signal frequency and the second magnetic field strength at the second current signal frequency are obtained; Obtain the height of the target detection point relative to the seabed; The detection distance is determined based on the magnetic field ratio between the first magnetic field strength and the second magnetic field strength. The burial depth of the submarine cable is determined based on the detection distance and the altitude. The detection distance is determined by the following formula: ； in, This represents the strength of the first magnetic field. This indicates the strength of the second magnetic field; This represents the first seawater propagation parameter corresponding to the frequency of the first current signal. This represents the second seawater propagation parameter corresponding to the frequency of the second current signal; Indicates the detection distance; Represents the first-order Bessel function of the second kind; The first current signal has a frequency of 50Hz, and the second current signal has a frequency of 5kHz.

2. The method for determining the burial depth of submarine cables according to claim 1, characterized in that, The magnetic field strength of the submarine cable was measured using a fluxgate sensor.

3. The method for determining the burial depth of submarine cables according to claim 1, characterized in that, The submarine cable is either a three-core submarine cable or a single-core submarine cable.

4. A device for determining the burial depth of a submarine cable, characterized in that, The submarine cable burial depth determination device includes: The third determining module is used to determine the target detection point; wherein the target detection point is located above the submarine cable, and the magnetic field strength value of the target detection point is greater than the magnetic field strength value of other detection points on the same horizontal plane; The acquisition module is used to acquire the first magnetic field strength of the submarine cable at the first current signal frequency and the second magnetic field strength at the second current signal frequency at the target point measurement point. The acquisition submodule is used to acquire the height of the target detection point relative to the seabed; The first determining module is used to determine the detection distance based on the magnetic field ratio between the first magnetic field strength and the second magnetic field strength; The second determining module is used to determine the burial depth of the submarine cable based on the detection distance and the height; The detection distance is determined by the following formula: ； in, This represents the strength of the first magnetic field. This indicates the strength of the second magnetic field; This represents the first seawater propagation parameter corresponding to the frequency of the first current signal. This represents the second seawater propagation parameter corresponding to the frequency of the second current signal; Indicates the detection distance; Represents the first-order Bessel function of the second kind; The first current signal has a frequency of 50Hz, and the second current signal has a frequency of 5kHz.

5. A non-transitory computer-readable storage medium having a computer program stored thereon, characterized in that, When executed by a processor, the computer program implements the steps of the method described in any one of claims 1-3.

6. An electronic device, characterized in that, include: A memory on which computer programs are stored; A processor for executing the computer program in the memory to implement the steps of the method according to any one of claims 1-3.

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