Cable corrosion detection method, device and equipment and storage medium

Abstract

The invention provides a cable corrosion detection method, device and equipment and a storage medium, and belongs to the technical field of cable detection, and the method comprises the steps: obtaining a plurality of temperature sensing data of a cable based on a grating array temperature sensing optical cable; determining a first corrosion detection result based on the temperature sensing data and a temperature threshold; when the first corrosion detection result is that corrosion occurs, determining the corrosion current density of the cable; and judging whether the corrosion current density is greater than a current density threshold, and if so, determining that the final corrosion result of the cable is corrosion. According to the invention, the detection efficiency of cable corrosion detection and the accuracy of the detection result are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of cable detection, and in particular to a cable corrosion detection method, device, equipment and storage medium. Background Art

[0002] Cable corrosion in transmission lines is one of the most common problems in power systems. Timely detection of corrosion is crucial to the safe operation and life of cables.

[0003] Traditional cable corrosion detection methods, such as visual inspection, chemical analysis, metallographic analysis, etc., have many limitations, such as low detection efficiency, poor accuracy, and the need for power outages, which cannot meet the requirements of modern power systems. For example, the existing transmission line corrosion detection methods have low detection efficiency and poor accuracy, making it difficult to determine whether the cable is corroded, and the detection process often requires power outages. Chemical analysis methods are usually time-consuming and labor-intensive, and are contact-based detections, which bring certain interference and risks to the line.

[0004] Therefore, there is an urgent need to provide a cable corrosion detection method, device, equipment and storage medium to improve the corrosion detection efficiency while ensuring the accuracy of corrosion detection. Summary of the invention

[0005] In view of this, it is necessary to provide a cable corrosion detection method, device, equipment and storage medium to solve the technical problems of low detection efficiency and detection accuracy of cable corrosion detection in the prior art.

[0006] On the one hand, in order to solve the above technical problems, the present invention provides a cable corrosion detection method, comprising: Obtain multiple temperature sensing data of the cable based on the grating array temperature sensing optical cable; determining a first corrosion detection result based on the temperature sensing data and a temperature threshold; When the first corrosion detection result indicates that corrosion occurs, determining the corrosion current density of the cable; It is determined whether the corrosion current density is greater than a current density threshold. If so, it is determined that the final corrosion result of the cable is corrosion.

[0007] In a possible implementation, determining the corrosion current density of the cable includes: determining polarization resistance and dielectric resistance of the cable; determining an actual polarization resistance based on the polarization resistance and the dielectric resistance; The Tafel constant of the cable is obtained, and the corrosion current density is determined based on the Tafel constant and the actual polarization resistance.

[0008] In a possible implementation, the corrosion current density is:

[0009]

[0010] In the formula, is the corrosion current density; is the Tafel constant; is the actual polarization resistance; is the polarization resistance; is the dielectric resistance.

[0011] In a possible implementation, the grating array temperature sensing optical cable includes a plurality of measuring areas and a plurality of temperature sensing gratings, each of the plurality of measuring areas corresponds to at least four temperature sensing gratings, a plurality of temperature sensing data corresponds one-to-one to the plurality of measuring areas, and each of the temperature sensing data includes a plurality of temperature sensing sub-data corresponding one-to-one to the temperature sensing gratings; then the method of obtaining a plurality of temperature sensing data of the cable based on the grating array temperature sensing optical cable includes: Sorting the plurality of temperature sensing sub-data in descending order of temperature value to determine maximum temperature sensing sub-data, minimum temperature sensing sub-data and a plurality of intermediate temperature sensing sub-data; Performing a first data fusion on the plurality of temperature sensor sub-data based on a tail-cutting weighted fusion algorithm to obtain fused data, and replacing the maximum temperature sensor sub-data and the minimum temperature sensor sub-data with the fused data; The fused data and the plurality of intermediate temperature sensing sub-data are subjected to a second data fusion based on a weighted minimum mean square error fusion algorithm to obtain the temperature sensing data.

[0012] In a possible implementation, the fused data is:

[0013] In the formula, To fuse data; is the total number of multiple temperature sensor sub-data; is the tail cutting rate; is the integer part of the truncated value; is the decimal part of the trimmed value; the trimmed value is ; is the temperature sensing sub-data corresponding to the j-th temperature sensing grating.

[0014] In a possible implementation, the temperature sensing data is:

[0015]

[0016] In the formula, is the temperature sensing data; N is the total number of multiple temperature sensor sub-data; is the weight of the jth temperature sensor sub-data; is the temperature value of the jth temperature sensor sub-data; is the variance of the jth temperature sensor sub-data.

[0017] In a possible implementation, the grating array temperature sensing optical cable includes a plurality of measuring areas, and the plurality of temperature sensing data correspond one-to-one to the plurality of measuring areas; then the method further includes: The corrosion position of the cable is determined based on the measurement area position of the measurement area.

[0018] On the other hand, the present invention also provides a cable corrosion detection device, comprising: A temperature sensing data acquisition unit, used for acquiring a plurality of temperature sensing data of the cable based on the grating array temperature sensing optical cable; a first corrosion detection result determining unit, configured to determine a first corrosion detection result based on the temperature sensing data and a temperature threshold; a corrosion current density determination unit, configured to determine the corrosion current density of the cable when the first corrosion detection result indicates that corrosion has occurred; The final corrosion determination unit is used to determine whether the corrosion current density is greater than a current density threshold. If so, it is determined that the final corrosion result of the cable is corrosion.

[0019] On the other hand, the present invention also provides a cable corrosion detection device, including a memory and a processor, wherein: The memory is used to store programs; The processor is coupled to the memory and is used to execute the program stored in the memory to implement the steps of the cable corrosion detection method described in any one of the possible implementations above.

[0020] On the other hand, the present invention also provides a computer-readable storage medium for storing computer-readable programs or instructions, which, when executed by a processor, can implement the steps of the cable corrosion detection method described in any possible implementation method mentioned above.

[0021] The beneficial effects of the present invention are as follows: the cable corrosion detection method provided by the present invention first obtains multiple temperature sensing data of the cable through a grating array temperature sensing optical cable, and determines the first corrosion detection result based on the temperature sensing data. It utilizes the principle that when the cable is corroded, the electrical conductivity and cross-sectional area of ​​the cable will decrease, thereby causing local heating at the corrosion location. The cable corrosion can be detected through the temperature sensing data. The detection method is simple and does not require the extraction of other complex feature data, thereby improving the efficiency of cable corrosion detection. Furthermore, after determining the first corrosion detection result based on the temperature sensing data, the present invention performs a secondary judgment on the cable corrosion based on the determined corrosion current density of the cable. When the secondary judgment result is also corrosion, the final corrosion result is determined to be corrosion, thereby ensuring the accuracy of the cable corrosion detection result. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0023] Figure 1 A schematic diagram of an embodiment of the cable corrosion detection method provided by the present invention; Figure 2 This is a schematic diagram of an embodiment of the process of determining the corrosion current density in step S103 of the present invention; Figure 3 For the present invention Figure 1 A schematic diagram of an embodiment of step S101; Figure 4 A schematic structural diagram of an embodiment of a cable corrosion detection device provided by the present invention; Figure 5 A schematic structural diagram of an embodiment of the cable corrosion detection equipment provided by the present invention. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0025] It should be understood that the schematic drawings are not drawn to scale. The flowchart used in the present invention shows the operations implemented according to some embodiments of the present invention. It should be understood that the operations of the flowchart can be implemented out of order, and the steps without logical context can be reversed in order or implemented simultaneously. In addition, those skilled in the art, under the guidance of the content of the present invention, can add one or more other operations to the flowchart, and can also remove one or more operations from the flowchart. Some of the block diagrams shown in the accompanying drawings are functional entities, which do not necessarily correspond to physically or logically independent entities. These functional entities can be implemented in software form, or in one or more hardware modules or integrated circuits, or in different networks and / or processor systems and / or microcontroller systems.

[0026] Reference to an "embodiment" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiment may be included in at least one embodiment of the present invention. The appearance of the phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0027] The present invention provides a cable corrosion detection method, device, equipment and storage medium, which are respectively described below.

[0028] Figure 1 A schematic diagram of an embodiment of the cable corrosion detection method provided by the present invention is shown in FIG. Figure 1 As shown, the cable corrosion detection method includes: S101, obtaining multiple temperature sensing data of the cable based on the grating array temperature sensing optical cable; S102, determining a first corrosion detection result based on the temperature sensing data and the temperature threshold; S103, when the first corrosion detection result indicates that corrosion occurs, determining the corrosion current density of the cable; S104, determining whether the corrosion current density is greater than a current density threshold, and if so, determining that the final corrosion result of the cable is corrosion.

[0029] The grating array temperature sensor optical cable in step S101 is surface-mounted on the cable and fits tightly with the cable.

[0030] It should be understood that step S102 specifically includes: when the temperature value of the temperature sensing data is greater than the temperature threshold, the first corrosion detection result is that corrosion occurs; otherwise, no corrosion occurs.

[0031] It should be noted that the temperature threshold and the current density threshold can be set or adjusted according to the actual structural parameters and application scenarios of the cable, and are not specifically limited here.

[0032] Compared with the prior art, the cable corrosion detection method provided in the embodiment of the present invention first obtains multiple temperature sensing data of the cable through a grating array temperature sensing optical cable, and determines the first corrosion detection result based on the temperature sensing data. It utilizes the principle that when the cable is corroded, the electrical conductivity and cross-sectional area of ​​the cable will decrease, which will lead to local heating at the corrosion location. The cable corrosion can be detected through the temperature sensing data. The detection method is simple and does not require the extraction of other complex feature data, thereby improving the efficiency of cable corrosion detection. Furthermore, after determining the first corrosion detection result based on the temperature sensing data, the embodiment of the present invention performs a secondary judgment on the cable corrosion based on the determined corrosion current density of the cable. When the secondary judgment result is also corrosion, the final corrosion result is determined to be corrosion, thereby ensuring the accuracy of the cable corrosion detection result.

[0033] In some embodiments of the present invention, Figure 2 As shown, determining the corrosion current density of the cable in step S103 includes: S201, determining the polarization resistance and dielectric resistance of the cable; S202, determining actual polarization resistance based on polarization resistance and dielectric resistance; S203. Obtain the Tafel constant of the cable, and determine the corrosion current density based on the Tafel constant and the actual polarization resistance.

[0034] The embodiment of the present invention determines the corrosion current density based on the polarization resistance, the dielectric resistance and the Tafel constant, and can judge whether corrosion occurs based on the corrosion mechanism itself, thereby improving the accuracy of the corrosion result finally determined.

[0035] Among them, the specific process of determining the polarization resistance in step S201 is: applying a linear polarization potential of ±10mV to the cable and the soil medium in which the cable is buried, and collecting the current signal in the polarization loop under the action of the linear polarization potential, and generating the polarization resistance according to the current signal in the polarization loop.

[0036] The specific process of determining the dielectric resistance in step S201 is: applying a high-frequency AC signal to the cable and the soil medium in which the cable is buried, collecting a current signal of the high-frequency AC signal acting on the soil medium, and generating the dielectric resistance according to the current signal acting on the soil medium.

[0037] Among them, the specific process of obtaining the Tafel constant in step S203 is: applying a weak polarization potential of ±40mV to the cable and the soil medium in which the cable is buried, and collecting the current signal in the polarization loop under the action of the weak polarization potential, and generating the Tafel constant according to the current signal in the polarization loop.

[0038] In a specific embodiment of the present invention, the corrosion current density is:

[0039]

[0040] In the formula, is the corrosion current density; is the Tafel constant; is the actual polarization resistance; is the polarization resistance; is the dielectric resistance.

[0041] In order to improve the accuracy of temperature sensing data and thus improve the accuracy of cable corrosion detection results, in some embodiments of the present invention, the correspondence between temperature sensing data and temperature sensing gratings is set to one-to-many, that is, the temperature sensing data of a measurement area is determined by multiple temperature sensing gratings, thereby avoiding the technical problem of inaccurate temperature sensing data caused by non-corrosion accidents.

[0042] In other words, the grating array temperature sensing optical cable includes multiple measuring areas and multiple temperature sensing gratings, each of the multiple measuring areas corresponds to at least four temperature sensing gratings, multiple temperature sensing data correspond one-to-one to the multiple measuring areas, and each temperature sensing data includes multiple temperature sensing sub-data corresponding one-to-one to the temperature sensing gratings.

[0043] When a temperature sensing data is determined based on multiple temperature sensing gratings, the temperature sensing data will be inaccurate due to the cross-sensitivity of the temperature sensing grating to temperature and strain. To solve this technical problem, in some embodiments of the present invention, such as Figure 3 As shown, step S101 includes: S301, sorting a plurality of temperature sensor sub-data in descending order of temperature value, and determining a maximum temperature sensor sub-data, a minimum temperature sensor sub-data, and a plurality of intermediate temperature sensor sub-data; S302, performing a first data fusion on the plurality of temperature sensor sub-data based on a tail-cutting weighted fusion algorithm to obtain fused data, and replacing the maximum temperature sensor sub-data and the minimum temperature sensor sub-data with the fused data; S303 , performing a second data fusion on the fused data and a plurality of intermediate temperature sensing sub-data based on a weighted minimum mean square error fusion algorithm to obtain temperature sensing data.

[0044] The embodiment of the present invention uses two data fusions. The first data fusion is used to overcome the measurement deviation caused by cross-sensitivity, and the second data fusion is used to eliminate the measurement noise in the data. After two data fusions, the accuracy of the determined temperature sensor data can be improved, and the accuracy of the detection results of cable corrosion detection can be further improved.

[0045] In a specific embodiment of the present invention, the fused data is:

[0046] In the formula, To fuse data; is the total number of multiple temperature sensor sub-data; is the tail cutting rate; is the integer part of the truncated value; is the decimal part of the trimmed value; the trimmed value is ; is the temperature sensing sub-data corresponding to the j-th temperature sensing grating.

[0047] The truncated rate is the ratio of the total number of the maximum temperature sensing sub-data, the minimum temperature sensing sub-data and the total number of the plurality of temperature sensing sub-data.

[0048] In a specific embodiment of the present invention, the temperature sensing data is:

[0049]

[0050] In the formula, is the temperature sensing data; N is the total number of multiple temperature sensor sub-data; is the weight of the jth temperature sensor sub-data; is the temperature value of the jth temperature sensor sub-data; is the variance of the jth temperature sensor sub-data.

[0051] Since when the cable is corroded, in order to facilitate maintenance personnel to make timely maintenance responses, it is necessary to determine the location of the corrosion when the corrosion is detected. Therefore, in some embodiments of the present invention, the cable corrosion detection method further includes: The corrosion position of the cable is determined based on the survey area location of the survey area.

[0052] The location of the measuring area is determined after the grating array temperature sensor optical cable is laid.

[0053] In order to further improve the rationality of the treatment plan of the maintenance personnel for the corroded cable, in some embodiments of the present invention, the cable corrosion detection method further includes: determining a temperature value and a temperature change rate based on the temperature sensing data; The temperature value, temperature change rate and corrosion current density are used as feature values ​​and input into the well-trained corrosion grade recognition model to obtain the corrosion grade.

[0054] The embodiment of the present invention can provide a reference for subsequent cable maintenance by determining the corrosion level, thereby improving the rationality of cable corrosion maintenance.

[0055] Among them, the corrosion level recognition model can be obtained by training, verification, and testing based on the historical data of the cable and the corrosion level labels of the historical data, which will not be elaborated here.

[0056] In a specific embodiment of the present invention, the corrosion level is divided into five levels, namely level 0, level 1, level 2, level 3, and level 4. The corrosion level increases from level 0 to level 4 in sequence, such as level 0 indicates no corrosion and level 4 indicates the most severe corrosion.

[0057] Specifically, after the corrosion level is determined, an early warning threshold level can also be set. The early warning threshold level is level 3. If the corrosion level exceeds level 3, an alarm or notification is generated to notify maintenance personnel to conduct further inspection and repair.

[0058] In order to better implement the cable corrosion detection method in the embodiment of the present invention, based on the cable corrosion detection method, the embodiment of the present invention also provides a cable corrosion detection device, such as Figure 4 As shown, the cable corrosion detection device 400 includes: The temperature sensing data acquisition unit 401 is used to obtain a plurality of temperature sensing data of the cable based on the grating array temperature sensing optical cable; A first corrosion detection result determination unit 402, configured to determine a first corrosion detection result based on the temperature sensing data and the temperature threshold; A corrosion current density determination unit 403, used to determine the corrosion current density of the cable when the first corrosion detection result is corrosion; The final corrosion determination unit 404 is used to determine whether the corrosion current density is greater than a current density threshold. If so, it is determined that the final corrosion result of the cable is corrosion.

[0059] The cable corrosion detection device 400 provided in the above embodiment can implement the technical solution described in the above cable corrosion detection method embodiment. The specific implementation principles of the above modules or units can refer to the corresponding contents in the above cable corrosion detection method embodiment, which will not be repeated here.

[0060] like Figure 5As shown, the present invention also provides a cable corrosion detection device 500. The cable corrosion detection device 500 includes a processor 501, a memory 502 and a display 503. Figure 5 Only some of the components of the cable corrosion detection device 500 are shown, but it should be understood that it is not required to implement all of the shown components, and more or fewer components may be implemented instead.

[0061] In some embodiments, the processor 501 may be a central processing unit (CPU), a microprocessor or other data processing chip, and is used to run program codes or process data stored in the memory 502, such as the cable corrosion detection method of the present invention.

[0062] In some embodiments of the present invention, processor 501 may be a single server or a server group. The server group may be centralized or distributed. In some embodiments, processor 501 may be local or remote. In some embodiments, processor 501 may be implemented in a cloud platform. In one embodiment, the cloud platform may include a private cloud, a public cloud, a hybrid cloud, a community cloud, a distributed cloud, an internal cloud, a multi-cloud, etc., or any combination thereof.

[0063] In some embodiments, the memory 502 may be an internal storage unit of the cable corrosion detection device 500, such as a hard disk or memory of the cable corrosion detection device 500. In other embodiments, the memory 502 may also be an external storage device of the cable corrosion detection device 500, such as a plug-in hard disk, a smart media card (SMC), a secure digital (SD) card, a flash card, etc., equipped on the cable corrosion detection device 500.

[0064] Furthermore, the memory 502 may include both an internal storage unit and an external storage device of the cable corrosion detection device 500. The memory 502 is used to store application software for installing the cable corrosion detection device 500 and various data.

[0065] In some embodiments, the display 503 may be an LED display, a liquid crystal display, a touch-sensitive liquid crystal display, an OLED (Organic Light-Emitting Diode) touch device, etc. The display 503 is used to display information of the cable corrosion detection device 500 and to display a visual user interface. The components 501-503 of the cable corrosion detection device 500 communicate with each other via a system bus.

[0066] In some embodiments of the present invention, when the processor 501 executes the cable corrosion detection program in the memory 502, the following steps may be implemented: Obtain multiple temperature sensing data of the cable based on the grating array temperature sensing optical cable; determining a first corrosion detection result based on the temperature sensing data and the temperature threshold; When the first corrosion detection result indicates that corrosion occurs, determining the corrosion current density of the cable; It is determined whether the corrosion current density is greater than the current density threshold. If so, it is determined that the final corrosion result of the cable is corrosion.

[0067] It should be understood that: when the processor 501 executes the cable corrosion detection program in the memory 502, in addition to the above functions, it can also implement other functions. For details, please refer to the description of the corresponding method embodiment above.

[0068] Furthermore, the embodiment of the present invention does not specifically limit the type of the cable corrosion detection device 500 mentioned. The cable corrosion detection device 500 may be a portable cable corrosion detection device such as a mobile phone, a tablet computer, a personal digital assistant (PDA), a wearable device, a laptop computer, etc. Exemplary embodiments of portable cable corrosion detection devices include but are not limited to portable cable corrosion detection devices equipped with IOS, Android, Microsoft or other operating systems. The above-mentioned portable cable corrosion detection device may also be other portable cable corrosion detection devices. It should also be understood that in some other embodiments of the present invention, the cable corrosion detection device 500 may not be a portable cable corrosion detection device, but a desktop computer with a touch-sensitive surface (such as a touch panel).

[0069] Correspondingly, an embodiment of the present invention also provides a computer-readable storage medium, which is used to store computer-readable programs or instructions. When the program or instructions are executed by a processor, it can implement the steps or functions of the cable corrosion detection method provided in the above-mentioned method embodiments.

[0070] Those skilled in the art will appreciate that all or part of the processes of the above-mentioned embodiments can be implemented by instructing related hardware (such as a processor, a controller, etc.) through a computer program, and the computer program can be stored in a computer-readable storage medium, wherein the computer-readable storage medium is a disk, an optical disk, a read-only storage memory, or a random access memory, etc.

[0071] The cable corrosion detection method, device, equipment and storage medium provided by the present invention are introduced in detail above. Specific examples are used in this article to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method of the present invention and its core idea; at the same time, for technical personnel in this field, according to the idea of ​​the present invention, there will be changes in the specific implementation method and application scope. In summary, the content of this specification should not be understood as a limitation on the present invention.

Claims

1. A cable corrosion detection method, characterized in that: include: Obtain multiple temperature sensing data of the cable based on the grating array temperature sensing optical cable; determining a first corrosion detection result based on the temperature sensing data and a temperature threshold; When the first corrosion detection result indicates that corrosion occurs, determining the corrosion current density of the cable; It is determined whether the corrosion current density is greater than a current density threshold. If so, it is determined that the final corrosion result of the cable is corrosion.

2. The cable corrosion detection method according to claim 1, characterized in that: The determining of the corrosion current density of the cable comprises: determining polarization resistance and dielectric resistance of the cable; determining an actual polarization resistance based on the polarization resistance and the dielectric resistance; The Tafel constant of the cable is obtained, and the corrosion current density is determined based on the Tafel constant and the actual polarization resistance.

3. The cable corrosion detection method according to claim 2, characterized in that: The corrosion current density is: In the formula, is the corrosion current density; is the Tafel constant; is the actual polarization resistance; is the polarization resistance; is the dielectric resistance.

4. The cable corrosion detection method according to claim 1, characterized in that: The grating array temperature sensing optical cable comprises a plurality of measuring areas and a plurality of temperature sensing gratings, each of the plurality of measuring areas corresponds to at least four temperature sensing gratings, a plurality of temperature sensing data corresponds one-to-one to the plurality of measuring areas, and each of the temperature sensing data comprises a plurality of temperature sensing sub-data corresponding one-to-one to the temperature sensing gratings; then the plurality of temperature sensing data of the cable obtained based on the grating array temperature sensing optical cable comprises: Sorting the plurality of temperature sensing sub-data in descending order of temperature value to determine maximum temperature sensing sub-data, minimum temperature sensing sub-data and a plurality of intermediate temperature sensing sub-data; Performing a first data fusion on the plurality of temperature sensor sub-data based on a tail-cutting weighted fusion algorithm to obtain fused data, and replacing the maximum temperature sensor sub-data and the minimum temperature sensor sub-data with the fused data; The fused data and the plurality of intermediate temperature sensing sub-data are subjected to a second data fusion based on a weighted minimum mean square error fusion algorithm to obtain the temperature sensing data.

5. The cable corrosion detection method according to claim 4, characterized in that: The fused data is: In the formula, To fuse data; is the total number of multiple temperature sensor sub-data; is the tail cutting rate; is the integer part of the truncated value; is the decimal part of the trimmed value; the trimmed value is ; is the temperature sensing sub-data corresponding to the j-th temperature sensing grating.

6. The cable corrosion detection method according to claim 4, characterized in that: The temperature sensing data is: In the formula, is the temperature sensing data; N is the total number of multiple temperature sensor sub-data; is the weight of the jth temperature sensor sub-data; is the temperature value of the jth temperature sensor sub-data; is the variance of the jth temperature sensor data.

7. The cable corrosion detection method according to claim 1, characterized in that: The grating array temperature sensing optical cable includes a plurality of measuring areas, and the plurality of temperature sensing data correspond one-to-one to the plurality of measuring areas; the method further includes: The corrosion position of the cable is determined based on the measurement area position of the measurement area.

8. A cable corrosion detection device, characterized in that: include: A temperature sensing data acquisition unit, used for acquiring a plurality of temperature sensing data of the cable based on the grating array temperature sensing optical cable; a first corrosion detection result determining unit, configured to determine a first corrosion detection result based on the temperature sensing data and a temperature threshold; a corrosion current density determination unit, configured to determine the corrosion current density of the cable when the first corrosion detection result indicates that corrosion has occurred; The final corrosion determination unit is used to determine whether the corrosion current density is greater than a current density threshold. If so, it is determined that the final corrosion result of the cable is corrosion.

9. A cable corrosion detection device, characterized in that: comprising a memory and a processor, wherein: The memory is used to store programs; The processor is coupled to the memory and is used to execute the program stored in the memory to implement the steps in the cable corrosion detection method described in any one of claims 1 to 7.

10. A computer-readable storage medium, characterized in that: Used to store computer-readable programs or instructions, which, when executed by a processor, can implement the steps of the cable corrosion detection method described in any one of claims 1 to 7.

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