Storage, submarine cable fault detection and diagnosis method, device, equipment and system

Abstract

The present invention discloses a memory, a method, a device and an apparatus for detecting and diagnosing a submarine cable fault, wherein the method comprises the following steps: obtaining vibration information data of an armor layer steel wire collected by a vibration monitoring device; the vibration monitoring device including a vibration sensor is arranged in a submarine cable repeater; generating a corresponding vibration waveform according to the vibration information data; generating a detection and diagnosis result of the submarine cable according to the characteristics of the vibration waveform; the detection and diagnosis result comprises one of whether the submarine cable is subjected to abnormal force, whether it is faulty, the fault type and the fault location, and any combination thereof; the submarine cable fault detection and diagnosis method of the present invention will not be affected by strong electromagnetic interference of the sea tide, so that even if the submarine cable is subjected to relatively slight mechanical damage, a judgment can be made in time, thereby improving the accuracy of fault detection and diagnosis.

Description

Technical Field

[0001] The present invention relates to the field of oil refining and processing, and in particular to a storage device, a submarine cable fault detection and diagnosis method, a device, a equipment and a system. Background Art

[0002] Submarine cables are the key link to ensure power transmission and distribution and information communication for offshore wind farms, offshore platforms and islands. Submarine cables themselves have complex structures, and are characterized by high operating voltage, large current, and harsh operating environment. During the laying and operation of submarine cables, they may fail due to various factors such as winding, stretching, hooking, and tidal impact. The main types of failures include insulation aging and degradation, insulation layer wear, short circuit, external force damage, and protective corrosion.

[0003] As the laying of submarine cable lines becomes increasingly complex, the problem of difficulty in fault diagnosis has gradually emerged, especially for some non-fiber-optic composite submarine cables, whose fault signals cannot be monitored and effectively transmitted in real time through fiber-optic sensing technology.

[0004] After research, the inventors found that in the prior art, the fault diagnosis method for non-fiber composite submarine cables is mostly the traditional partial discharge detection method. This method is affected by the strong electromagnetic interference of the sea tide, and the original signal waveform is seriously distorted. It is not effective in actual application for non-electrical faults caused by external force damage such as ship anchoring, rock wear, insulation erosion, etc., resulting in the failure to promptly detect minor mechanical damage to the submarine cable.

[0005] The information disclosed in this background technology section is only intended to enhance the understanding of the overall background of the invention and should not be regarded as an acknowledgment or any form of suggestion that the information constitutes the prior art already known to a person skilled in the art. Summary of the invention

[0006] The purpose of the present invention is to improve the accuracy of fault detection and diagnosis of submarine cables when mechanical damage occurs.

[0007] The present invention provides a method for detecting and diagnosing submarine cable faults, comprising the steps of:

[0008] S11, obtaining vibration information data of the armor layer steel wire collected by a vibration monitoring device; the vibration monitoring device including a vibration sensor is arranged in a submarine cable repeater;

[0009] S12, generating a corresponding vibration waveform according to the vibration information data;

[0010] S13. Generate a detection and diagnosis result of the submarine cable according to the characteristics of the vibration waveform; the detection and diagnosis result includes whether the submarine cable is abnormally stressed, whether it is faulty, the fault type and the fault location, and any combination thereof.

[0011] In the present invention, the vibration sensors include a plurality of sensors which are respectively arranged at different positions of the submarine cable.

[0012] In the present invention, the vibration information data includes low-frequency longitudinal wave vibration information data.

[0013] In the present invention, judging whether the submarine cable is subjected to abnormal stress includes:

[0014] When the amplitude change of the vibration waveform of a certain vibration sensor exceeds a first threshold value, it is determined that the submarine cable is subjected to abnormal stress.

[0015] In the present invention, determining whether the submarine cable is faulty includes:

[0016] When the amplitude change of the vibration waveform of a certain vibration sensor exceeds a second threshold, it is determined that the submarine cable is faulty.

[0017] In the present invention, determining the fault location of the submarine cable includes:

[0018] Fitting the vibration waveforms generated by the vibration information of the plurality of vibration sensors, and determining the fault location according to formula (1);

[0019]

[0020] Where P is the sound pressure collected by the sensor (db), δ is the vibration attenuation constant of the armor layer steel wire; X is the actual propagation distance of the vibration in the steel wire layer of the submarine cable, f 0 It is the vibration frequency obtained based on the vibration information collected by the vibration sensor.

[0021] In the present invention, determining the fault type of the submarine cable includes:

[0022] When the vibration waveform is a non-planar echo, the vibration waveforms generated by the vibration information of the multiple vibration sensors are fitted, and the fault area S is determined according to formula (2): 1 ;

[0023]

[0024] Among them, P 0 Indicates the initial sound pressure of the wave source, S 0 Represents the source area, P f represents the received return sound pressure, f represents the sound wave frequency, and X is the actual propagation distance of the vibration in the steel wire layer of the submarine cable.

[0025] In the present invention, determining the fault type of the submarine cable includes:

[0026] When the vibration waveform is a plane echo, the vibration waveforms generated by the vibration information of the plurality of vibration sensors are fitted, and the fault area S is determined according to formula (3): 2 ;

[0027]

[0028] Among them, P 0 Indicates the initial sound pressure of the wave source, S 0 Represents the source area, P f represents the received return sound pressure, f represents the sound wave frequency, and X is the actual propagation distance of the vibration in the steel wire layer of the submarine cable.

[0029] In another aspect of the present invention, there is also provided a submarine cable fault detection and diagnosis device, comprising:

[0030] A vibration signal acquisition unit, used to obtain vibration information data of the armor layer steel wire collected by the vibration monitoring device; the vibration monitoring device including a vibration sensor is arranged on the submarine cable repeater;

[0031] A waveform generating unit, used for generating a corresponding vibration waveform according to the vibration information;

[0032] The waveform analysis unit is used to generate a detection and diagnosis result of the submarine cable according to the characteristics of the vibration waveform; the detection and diagnosis result includes whether the submarine cable is abnormally stressed, whether it is faulty, the fault type and the fault location, and any combination thereof.

[0033] In the present invention, the vibration signal acquisition unit further includes a vibration detection device:

[0034] The vibration detection device includes a signal amplifier and a communication module, which are used to amplify the vibration information data collected by the vibration sensor and send it to the waveform generation unit.

[0035] In another aspect of the present invention, a memory is provided, comprising a software program, wherein the software program is suitable for a processor to execute the steps of the above-mentioned submarine cable fault detection and diagnosis method.

[0036] On the other hand, an embodiment of the present invention further provides a submarine cable fault detection and diagnosis device, which includes a computer program stored in a memory, and the computer program includes program instructions. When the program instructions are executed by a computer, the computer executes the methods described in the above aspects and achieves the same technical effects.

[0037] Another aspect of the embodiment of the present invention further provides a submarine cable fault detection and diagnosis system, comprising the above-mentioned submarine cable fault detection and diagnosis equipment, and a vibration monitoring device; the submarine cable fault detection and diagnosis equipment comprises a computer program stored in a memory, and the computer program comprises program instructions. When the program instructions are executed by a computer, the computer executes the methods described in the above aspects and achieves the same technical effects.

[0038] Compared with the prior art, the present invention has the following beneficial effects:

[0039] The inventor has found through research that when a submarine cable is mechanically damaged, the armor layer steel wires serving as the protective layer of the submarine cable will first be impacted. Since the armor layer steel wires are made of metal with good vibration conduction performance, when the submarine cable is mechanically damaged, it will inevitably cause corresponding changes in the vibration waves in the armor layer steel wires.

[0040] Based on the above understanding, in the present invention, first, a vibration sensor is installed on the armor layer steel wire of the submarine cable to collect the vibration signal of the armor layer steel wire in real time, and then the vibration information data generated according to the vibration signal is sent to a remote processing device; in this way, after the vibration waveform is generated by the vibration information data, the detection and diagnosis results of the submarine cable can be generated in real time according to the characteristics of the vibration waveform, so as to monitor whether the submarine cable has abnormal stress or fault, and even determine the fault type and the fault location by calculation.

[0041] As can be seen from the above, the submarine cable fault detection and diagnosis method of the present invention does not rely on electrical or optical signals, and is therefore not affected by the strong electromagnetic interference and influence of the sea tide. In this way, even if the submarine cable is subjected to relatively minor mechanical damage, a judgment can be made in a timely manner, thereby improving the accuracy of fault detection and diagnosis.

[0042] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention and implement it according to the contents of the specification, and to make the above and other purposes, technical features and advantages of the present invention easier to understand, one or more preferred embodiments are listed below and described in detail with the accompanying drawings as follows. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] Figure 1 is a step diagram of the submarine cable fault detection and diagnosis method of the present invention;

[0044] Figure 2 It is a structural schematic diagram of the submarine cable fault detection and diagnosis device of the present invention;

[0045] Figure 3It is a structural schematic diagram of the submarine cable fault detection and diagnosis equipment described in the present invention. DETAILED DESCRIPTION

[0046] The specific implementation modes of the present invention are described in detail below in conjunction with the accompanying drawings, but it should be understood that the protection scope of the present invention is not limited by the specific implementation modes.

[0047] Unless explicitly stated otherwise, throughout the specification and claims, the term “comprise” or variations such as “include” or “comprising”, etc., will be understood to include the stated elements or components but not to exclude other elements or components.

[0048] In this document, the terms "first", "second", etc. are used to distinguish two different elements or parts, and are not used to limit a specific position or relative relationship. In other words, in some embodiments, the terms "first", "second", etc. can also be interchangeable.

[0049] Embodiment 1

[0050] In order to improve the fault detection and diagnosis accuracy of submarine cables when mechanical damage occurs, Figure 1 As shown, in an embodiment of the present invention, a method for detecting and diagnosing a submarine cable fault is provided, comprising the steps of:

[0051] S11, obtaining vibration information data of the armor layer steel wire collected by a vibration monitoring device; the vibration monitoring device including a vibration sensor is arranged in a submarine cable repeater;

[0052] The core inventive idea of ​​the embodiment of the present invention includes: the inventor has found through research that when the submarine cable is mechanically damaged, the armor layer steel wire serving as the protective layer of the submarine cable will be impacted first. Since the armor layer steel wire is a metal material with good vibration conduction performance, when the submarine cable is mechanically damaged, it will inevitably cause corresponding changes in the vibration wave in the armor layer steel wire.

[0053] Based on the above understanding, in an embodiment of the present invention, a vibration monitoring device is firstly provided on the submarine cable to collect vibration information data of the armor layer steel wire; then, a remote submarine cable fault detection and diagnosis device (which may be a computer terminal or server or other device with data processing capability) is also provided; data communication can be achieved between the vibration monitoring device and the submarine cable fault detection and diagnosis device.

[0054] The vibration monitoring device in the embodiment of the present invention mainly includes a vibration sensor. In addition, it can also have a signal amplifier and a communication module, wherein the signal amplifier is used to amplify the vibration signal collected by the vibration sensor; the communication module is used to convert the amplified vibration signal into vibration information data and send it to a remote submarine cable fault detection and diagnosis device.

[0055] In practical applications, there may be multiple vibration monitoring devices in the embodiment of the present invention, which are respectively arranged at different positions of the submarine cable to achieve fault detection and diagnosis in long-distance areas; preferably, the vibration monitoring devices can be arranged equidistantly.

[0056] Preferably, since submarine cable, as a linear vibration conduction medium, is more conducive to the transmission of low-frequency longitudinal wave vibration signals, in an embodiment of the present invention, the vibration information data is preferably low-frequency longitudinal wave vibration information data, that is, a low-frequency longitudinal wave vibration sensor is preferably used to collect the vibration signal of the armor layer steel wire.

[0057] S12, generating a corresponding vibration waveform according to the vibration information data;

[0058] After receiving the vibration information data collected by each vibration monitoring device, the submarine cable fault detection and diagnosis equipment can generate a corresponding vibration waveform.

[0059] In practical applications, data storage devices can also be used to store the vibration waveforms generated under normal operating conditions of the submarine cable and the vibration waveforms during various faults as reference data.

[0060] S13. Generate a detection and diagnosis result of the submarine cable according to the characteristics of the vibration waveform; the detection and diagnosis result includes whether the submarine cable is abnormally stressed, whether it is faulty, the fault type and the fault location, and any combination thereof.

[0061] In the embodiment of the present invention, the detection and diagnosis result is obtained based on the vibration waveform corresponding to each vibration monitoring device; each vibration monitoring device in the embodiment of the present invention has corresponding position data, and the distance between each vibration monitoring device is also known; in this way, based on the correspondence between the vibration monitoring device and the vibration waveform, the position corresponding to each vibration waveform can be known; further, the positional relationship between each vibration waveform can also be known.

[0062] The simplest way to generate the detection and diagnosis results of submarine cables based on the characteristics of vibration waveforms is to identify whether the submarine cable is faulty by comparing the vibration waveforms. It can also be achieved by setting corresponding judgment rules to determine whether the submarine cable is abnormally stressed, whether it is faulty, the fault type and the fault location. Specifically, it can be:

[0063] When judging whether the submarine cable is subjected to abnormal stress, it can be:

[0064] According to actual working conditions and the experience of technical personnel in this field, or according to experimental data, a threshold value (first threshold value) can be determined as a basis for determining whether abnormal stress occurs in the submarine cable; in this way, when the amplitude change of the vibration waveform of a certain vibration sensor exceeds the first threshold value, the submarine cable is judged to be abnormally stressed. At this time, the detection and diagnosis result is that abnormal stress occurs.

[0065] Similarly, according to actual working conditions and the experience of technical personnel in this field, or according to experimental data, another threshold value (second threshold value) can be determined as a basis for determining whether a submarine cable fails. In this way, when the amplitude change of the vibration waveform of a certain vibration sensor exceeds the second threshold value, the submarine cable is judged to be faulty. At this time, the detection and diagnosis result is that a fault has occurred.

[0066] In the embodiment of the present invention, it is not only possible to determine whether a submarine cable has a fault, but also possible to determine the fault location of the submarine cable according to the vibration waveform. Specifically:

[0067] Determine the fault location of the submarine cable, including:

[0068] Fitting the vibration waveforms generated by the vibration information of the plurality of vibration sensors, and determining the fault location according to formula (1);

[0069]

[0070] Where P is the sound pressure collected by the sensor (db), δ is the vibration attenuation constant of the armor layer steel wire; X is the actual propagation distance of the vibration in the steel wire layer of the submarine cable, f 0 It is the vibration frequency obtained based on the vibration information collected by the vibration sensor.

[0071] Since vibration is attenuated during propagation, the above empirical formula can be obtained based on the sound pressure of the armor layer steel wire, the vibration attenuation constant, the vibration frequency, and a constant (8.686) obtained by experiments based on the actual working conditions of the submarine cable, that is, formula (1). In this way, according to formula (1), the actual propagation distance of the vibration signal in the submarine cable steel wire layer can be measured, and then the specific location of the fault can be calculated (the specific location of the fault is the location of the vibration source).

[0072] Furthermore, in the embodiment of the present invention, the fault area of ​​the submarine cable can be determined according to the vibration waveform, and the severity of the fault can be further estimated according to the calculated fault area, which can provide reference information for remedial measures, specifically:

[0073] When the vibration waveform is a non-planar echo, the vibration waveforms generated by the vibration information of the multiple vibration sensors are fitted, and the fault area S is determined according to formula (2): 1 ;

[0074]

[0075] Among them, P 0 Indicates the initial sound pressure of the wave source, S 0 Represents the source area, P f represents the received return sound pressure, f represents the sound wave frequency, and X is the actual propagation distance of the vibration in the steel wire layer of the submarine cable.

[0076] According to the principle of sound pressure distribution on the wave source axis, the sound pressure is inversely proportional to the propagation distance and directly proportional to the wave source area. Empirical formulas (2) and (3) were obtained through multiple experimental fittings.

[0077] In addition, when the vibration waveform is a plane echo, the vibration waveforms generated by the vibration information of the plurality of vibration sensors are fitted, and the fault area S is determined according to formula (3): 2 ;

[0078]

[0079] Among them, P 0 Indicates the initial sound pressure of the wave source, S 0 Represents the source area, P f represents the received return sound pressure, f represents the sound wave frequency, and X is the actual propagation distance of the vibration in the steel wire layer of the submarine cable.

[0080] To sum up, in the embodiment of the present invention, first, a vibration sensor is installed on the armor layer steel wire of the submarine cable to collect the vibration signal of the armor layer steel wire in real time, and then the vibration information data generated according to the vibration signal is sent to a remote processing device; in this way, after the vibration waveform is generated by the vibration information data, the detection and diagnosis results of the submarine cable can be generated in real time according to the characteristics of the vibration waveform, so as to monitor whether the submarine cable has abnormal stress or fault, and even determine the fault type and the fault location by calculation.

[0081] As can be seen from the above, the submarine cable fault detection and diagnosis method in the embodiment of the present invention does not rely on electrical or optical signals, and is therefore not affected by the strong electromagnetic interference and influence of the sea tide. In this way, even if the submarine cable is subjected to relatively minor mechanical damage, a judgment can be made in a timely manner, thereby improving the accuracy of fault detection and diagnosis.

[0082] Embodiment 2

[0083] In another aspect of the embodiment of the present invention, a submarine cable fault detection and diagnosis device is also provided. Figure 2 The schematic diagram of the structure of the submarine cable fault detection and diagnosis device provided by the embodiment of the present invention is shown. Figure 1 The device corresponding to the submarine cable fault detection and diagnosis method described in the corresponding embodiment, that is, implemented by means of a virtual device Figure 1 In the corresponding embodiment of the submarine cable fault detection and diagnosis method, each virtual module constituting the submarine cable fault detection and diagnosis device can be executed by an electronic device, such as a network device, a terminal device, or a server. Specifically, the submarine cable fault detection and diagnosis device in the embodiment of the present invention includes:

[0084] The vibration signal acquisition unit 01 is used to obtain the vibration information data of the armor layer steel wire collected by the vibration monitoring device; the vibration monitoring device including the vibration sensor is arranged in the submarine cable repeater;

[0085] The waveform generating unit 02 is used to generate a corresponding vibration waveform according to the vibration information;

[0086] The waveform analysis unit 03 is used to generate a detection and diagnosis result of the submarine cable according to the characteristics of the vibration waveform; the detection and diagnosis result includes whether the submarine cable is abnormally stressed, whether it is faulty, the fault type and the fault location, and any combination thereof.

[0087] Since the working principle and beneficial effects of the submarine cable fault detection and diagnosis device in the embodiment of the present invention have been Figure 1 The corresponding submarine cable fault detection and diagnosis method is also recorded and described, so they can be cross-referenced and will not be repeated here.

[0088] Embodiment 3

[0089] In an embodiment of the present invention, a memory is further provided, wherein the memory includes a software program, and the software program is suitable for the processor to execute Figure 1 The corresponding steps in the submarine cable fault detection and diagnosis method.

[0090] The embodiments of the present invention can be implemented by means of a software program, that is, by writing a program for implementing Figure 1 The corresponding software program (and instruction set) for each step in the submarine cable fault detection and diagnosis method is stored in a storage device, and the storage device is arranged in a computer device, so that the software program can be called by the processor of the computer device to achieve the purpose of the embodiment of the present invention.

[0091] Embodiment 4

[0092] In an embodiment of the present invention, a submarine cable fault detection and diagnosis device is further provided. The memory included in the submarine cable fault detection and diagnosis device includes a corresponding computer program product. When the program instructions included in the computer program product are executed by a computer, the computer can execute the submarine cable fault detection and diagnosis methods described in the above aspects and achieve the same technical effects.

[0093] Figure 3 FIG. 1 is a schematic diagram of the hardware structure of a submarine cable fault detection and diagnosis device as an electronic device according to an embodiment of the present invention. Figure 3 As shown, the device includes one or more processors 610, a bus 630, and a memory 620. Taking one processor 610 as an example, the device may also include: an input device 640, and an output device 650.

[0094] The processor 610, the memory 620, the input device 640 and the output device 650 may be connected via a bus or other means. Figure 3 The example of connecting through bus is taken in the following.

[0095] The memory 620 is a non-transitory computer-readable storage medium that can be used to store non-transitory software programs, non-transitory computer executable programs, and modules. The processor 610 executes various functional applications and data processing of the electronic device by running the non-transitory software programs, instructions, and modules stored in the memory 620, that is, the processing method of the above method embodiment is implemented.

[0096] The memory 620 may include a program storage area and a data storage area, wherein the program storage area may store an operating system, an application required for at least one function; the data storage area may store data, etc. In addition, the memory 620 may include a high-speed random access memory, and may also include a non-transitory memory, such as at least one disk storage device, a flash memory device, or other non-transitory solid-state storage device. In some embodiments, the memory 620 may optionally include a memory remotely arranged relative to the processor 610, and these remote memories may be connected to the processing device via a network. Examples of the above-mentioned network include, but are not limited to, the Internet, an intranet, a local area network, a mobile communication network, and combinations thereof.

[0097] The input device 640 can receive input digital or character information and generate signal input. The output device 650 can include a display device such as a display screen.

[0098] The one or more modules are stored in the memory 620, and when executed by the one or more processors 610, perform:

[0099] S11, obtaining vibration information data of the armor layer steel wire collected by a vibration monitoring device; the vibration monitoring device including a vibration sensor is arranged in a submarine cable repeater;

[0100] S12, generating a corresponding vibration waveform according to the vibration information data;

[0101] S13. Generate a detection and diagnosis result of the submarine cable according to the characteristics of the vibration waveform; the detection and diagnosis result includes whether the submarine cable is abnormally stressed, whether it is faulty, the fault type and the fault location, and any combination thereof.

[0102] Embodiment 5

[0103] In an embodiment of the present invention, a submarine cable fault detection and diagnosis system is also provided, comprising the submarine cable fault detection and diagnosis device in the fourth embodiment, and a vibration monitoring device;

[0104] The vibration monitoring device includes a vibration sensor, a signal amplifier and a communication module; the vibration sensor is arranged on the armor layer steel wire of the submarine cable, and is used to collect the vibration signal of the prime armor layer steel wire;

[0105] The signal amplifier is used to amplify the vibration signal; the communication module is used to convert the amplified vibration signal into vibration information data and send it to the submarine cable fault detection and diagnosis equipment.

[0106] The submarine cable fault detection and diagnosis system in the embodiment of the present invention includes a vibration monitoring device set on the submarine cable and a remote submarine cable fault detection and diagnosis device, and the submarine cable fault detection and diagnosis is realized through the cooperation of the two. Specifically, in the embodiment of the present invention, firstly, a vibration sensor is installed on the armor layer steel wire of the submarine cable to collect the vibration signal of the armor layer steel wire in real time, and then the vibration information data generated according to the vibration signal is sent to the remote processing equipment (i.e., the submarine cable fault detection and diagnosis device); in this way, after the vibration waveform is generated by the vibration information data, the detection and diagnosis results of the submarine cable can be generated in real time according to the characteristics of the vibration waveform, so as to monitor whether the submarine cable is subjected to abnormal force or whether a fault occurs, and even the fault type can be judged by calculation, and the fault location can be determined.

[0107] The above product can execute the method provided by the embodiment of the present invention, and has the functional modules and beneficial effects corresponding to the execution method. For technical details not described in detail in this embodiment, please refer to the method provided by the embodiment of the present invention.

[0108] In the several embodiments provided by the present invention, it should be understood that the disclosed systems, devices and methods can be implemented in other ways. For example, the device embodiments described above are only schematic. For example, the division of the units is only a logical function division. There may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be an indirect coupling or communication connection through some interfaces, devices or units, which can be electrical, mechanical or other forms.

[0109] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0110] In addition, each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above-mentioned integrated unit may be implemented in the form of hardware or in the form of software functional units.

[0111] If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention is essentially or the part that contributes to the prior art or all or part of the technical solution can be embodied in the form of a software product. The computer software product is stored in a storage device, including several instructions to enable a computer device (which can be a personal computer, server, or network device, etc.) to perform all or part of the steps of the method described in each embodiment of the present invention. The aforementioned storage device includes: U disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), ReRAM, MRAM, PCM, NAND Flash, NOR Flash, Memristor, disk or optical disk and other media that can store program codes.

[0112] As described above, the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features thereof may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method for detecting and diagnosing submarine cable faults, characterized in that: Includes steps: S11, obtaining vibration information data of the armor layer steel wire collected by a vibration monitoring device; the vibration monitoring device including a vibration sensor is arranged in a submarine cable repeater; S12, generating a corresponding vibration waveform according to the vibration information data; S13, generating a detection and diagnosis result of the submarine cable according to the characteristics of the vibration waveform; the detection and diagnosis result includes whether the submarine cable is abnormally stressed, whether it is faulty, the fault type and the fault location, and any combination thereof; The vibration sensors include a plurality of sensors respectively arranged at different positions of the submarine cable; Determine the fault location of the submarine cable, including: Fitting the vibration waveforms generated by the vibration information of the plurality of vibration sensors, and determining the fault location according to formula (1); Among them, P is the sound pressure (db) collected by the sensor, δ is the vibration attenuation constant of the armor layer steel wire; X is the actual propagation distance of the vibration in the steel wire layer of the submarine cable, and f0 is the vibration frequency obtained based on the vibration information collected by the vibration sensor.

2. The method for detecting and diagnosing submarine cable faults according to claim 1, characterized in that: The vibration information data includes low-frequency longitudinal wave vibration information data.

3. The method for detecting and diagnosing submarine cable faults according to claim 1, characterized in that: Determining whether the submarine cable is subjected to abnormal stress includes: When the amplitude change of the vibration waveform of a certain vibration sensor exceeds a first threshold value, it is determined that the submarine cable is subjected to abnormal stress.

4. The method for detecting and diagnosing submarine cable faults according to claim 1, characterized in that: Determining whether the submarine cable is faulty includes: When the amplitude change of the vibration waveform of a certain vibration sensor exceeds a second threshold, it is determined that the submarine cable is faulty.

5. A submarine cable fault detection and diagnosis device, characterized in that: include: A vibration signal acquisition unit is used to obtain vibration information data of the armor layer steel wire collected by the vibration monitoring device; the vibration monitoring device including a vibration sensor is arranged on the submarine cable repeater; the vibration sensor includes a plurality of sensors and is respectively arranged at different positions of the submarine cable; A waveform generating unit, used for generating a corresponding vibration waveform according to the vibration information; A waveform analysis unit, used to generate a detection and diagnosis result of the submarine cable according to the characteristics of the vibration waveform; the detection and diagnosis result includes whether the submarine cable is abnormally stressed, whether it is faulty, the fault type and the fault location, and any combination thereof; Determine the fault location of the submarine cable, including: Fitting the vibration waveforms generated by the vibration information of the plurality of vibration sensors, and determining the fault location according to formula (1); Among them, P is the sound pressure (db) collected by the sensor, δ is the vibration attenuation constant of the armor layer steel wire; X is the actual propagation distance of the vibration in the steel wire layer of the submarine cable, and f0 is the vibration frequency obtained based on the vibration information collected by the vibration sensor.

6. The submarine cable fault detection and diagnosis device according to claim 5, characterized in that: The vibration signal acquisition unit also includes a vibration detection device: The vibration detection device includes a signal amplifier and a communication module, which are used to amplify the vibration information data collected by the vibration sensor and send the amplified data to the waveform generation unit.

7. A memory, characterized in that: The method comprises a software program, wherein the software program is suitable for executing the steps of the submarine cable fault detection and diagnosis method according to any one of claims 1 to 4 by a processor.

8. A submarine cable fault detection and diagnosis device, characterized in that: comprising a bus, a processor and a memory as claimed in claim 7; The bus is used to connect the memory and the processor; The processor is configured to execute an instruction set in the memory.

9. A submarine cable fault detection and diagnosis system, characterized in that: It comprises the submarine cable fault detection and diagnosis equipment as claimed in claim 8, and a vibration monitoring device; The vibration monitoring device includes a vibration sensor, a signal amplifier and a communication module; The vibration sensor is arranged on the armor layer steel wire of the submarine cable and is used to collect the vibration signal of the prime armor layer steel wire; The signal amplifier is used to amplify the vibration signal; The communication module is used to convert the amplified vibration signal into vibration information data and send it to the submarine cable fault detection and diagnosis equipment.

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