Lightning stroke positioning method and device for OPPC cable, terminal equipment and storage medium

Abstract

The invention discloses a lightning stroke positioning method and device based on an OPPC cable, terminal equipment and a storage medium. The method comprises the following steps: acquiring back scattering signals acquired by distributed sensing optical fibers integrated in the OPPC cable; wherein each backscattering signal corresponds to a sampling point, the backscattering signals are generated at the sampling points after optical pulses are propagated in the distributed sensing optical fiber, and the backscattering signals comprise a Stokes scattering light signal and an anti-Stokes scattering light signal; determining the current temperature value of each sampling point on the OPPC cable according to the Stokes scattered light signal and the anti-Stokes scattered light signal; determining the temperature change rate of each sampling point according to the current temperature value and the historical temperature value of each sampling point; and determining a lightning stroke occurrence position according to the current temperature value of each sampling point and the temperature change rate of each sampling point. According to the invention, the accuracy of lightning stroke positioning can be improved.

Description

Technical Field

[0001] The present invention relates to the technical field of cable detection, and in particular to a method, device, equipment and storage medium for locating lightning strikes of an OPPC cable. Background Art

[0002] Optical Phase Conductor (OPPC) is a new type of special power optical cable, which is a cable that combines optical fiber units in the phase line, and has the dual functions of phase line and communication. Since OPPC optical cables run in complex natural environments for a long time, once struck by lightning, the instantaneous high temperature will cause local carbonization of the OPPC optical cable, breakage of strands, or even breakage of the entire cable. The lightning strike phenomenon is random, and after the lightning strike, it is highly concealed. The long running distance of OPPC optical cables are all important factors affecting the location of hidden dangers.

[0003] The traditional method of locating lightning strikes on OPPC cables is to install lightning detection equipment at both ends of the OPPC cable. When a lightning strike occurs, the lightning detection equipment records the arrival time of the lightning surge and calculates the specific lightning strike location through the time difference. However, since the lightning detection equipment is also interfered by other electrical equipment mounted on the OPPC optical cable and environmental interference, it is impossible to accurately distinguish between the real surge waveform and the interference signal waveform, resulting in low accuracy and positioning precision of lightning strike positioning. Summary of the invention

[0004] The embodiments of the present invention provide a lightning strike location method, an apparatus, a terminal device and a storage medium based on an OPPC cable, which can improve the accuracy of lightning strike location.

[0005] An embodiment of the present invention provides a lightning strike location method based on an OPPC cable, comprising:

[0006] Acquire each backscattered signal collected by the distributed sensing optical fiber integrated in the OPPC cable; wherein each backscattered signal corresponds to a sampling point, the backscattered signal is generated at the sampling point after the light pulse propagates in the distributed sensing optical fiber, and the backscattered signal includes a Stokes scattered light signal and an anti-Stokes scattered light signal;

[0007] Determine the current temperature value of each sampling point on the OPPC cable according to the Stokes scattered light signal and the anti-Stokes scattered light signal;

[0008] Determine the temperature change rate of each sampling point based on the current temperature value and historical temperature value of each sampling point;

[0009] The location where the lightning strike occurs is determined based on the current temperature value of each sampling point and the temperature change rate of each sampling point.

[0010] Further, determining the current temperature value of each sampling point on the OPPC cable according to the Stokes scattered light signal and the anti-Stokes scattered light signal includes:

[0011] The current temperature value is calculated using the following formula:

[0012]

[0013] Where, T is the temperature; h is Planck's constant; K is the Boltzmann constant; Δf is the Raman light frequency increment; I S is the Stokes scattered light signal; I AS is the anti-Stokes scattered light signal; f 0 is the frequency of the accompanying light.

[0014] Further, determining the lightning strike location according to the current temperature value of each sampling point and the temperature change rate of each sampling point includes:

[0015] Compare the current temperature value of each sampling point with a preset temperature threshold, and take the sampling point with a temperature greater than the threshold as the target sampling point;

[0016] For each target sampling point, the temperature change rate of the target sampling point is compared with a preset change rate threshold, and the temperature value of the target sampling point is compared with the average temperature of other sampling points except the current target sampling point;

[0017] When it is determined that the temperature change rate of the target sampling point is greater than a preset threshold, and the temperature value of the target sampling point is greater than the average temperature of other sampling points except the current target sampling point, the target sampling point is determined to be a lightning strike point;

[0018] The distance between the incident end of the light pulse and the lightning strike point is calculated, and the lightning strike location is determined according to the distance and the location of the incident end of the light pulse.

[0019] Furthermore, the distance between the incident end of the light pulse and the lightning strike point is calculated by the following formula:

[0020]

[0021] In the formula, x i is the distance between the lightning strike point and the incident end of the light pulse; c k is the light propagation speed in the distributed optical fiber; Δt i It is the time difference between the emission of the light pulse and the generation of the backscattered signal at the lightning strike point.

[0022] Furthermore, before acquiring each backscattered signal collected by the distributed sensing optical fiber integrated in the OPPC cable, it also includes:

[0023] Obtain meteorological images that characterize weather conditions in the area where the OPPC cable is located;

[0024] Inputting the meteorological image into a preset lightning recognition model so that the lightning recognition model generates a probability of lightning occurrence according to the meteorological image;

[0025] In the case where the probability of lightning occurrence is greater than a preset probability threshold, the step of acquiring each backscattered signal collected by the distributed sensing optical fiber integrated in the OPPC cable is performed.

[0026] Furthermore, after determining the location of the lightning strike, the following steps are also included:

[0027] Inputting the meteorological image into a preset lightning area prediction model so that the lightning area prediction model generates a lightning prediction area according to the meteorological image;

[0028] Determine whether the lightning strike location is within the lightning prediction area;

[0029] If so, it is determined that the lightning strike location is correct; if not, it is determined that the lightning strike location is inaccurate.

[0030] Furthermore, after determining the lightning strike location, it also includes: visually displaying the lightning strike location, the temperature value at the lightning point, and the temperature change rate in a display interface, and generating lightning strike warning information in the display interface in the form of a pop-up window.

[0031] Based on the above method embodiment, the present invention provides a corresponding device embodiment;

[0032] An embodiment of the present invention provides a lightning strike location device for an OPPC cable.

[0033] Further, the time series decomposition module performs seasonal trend decomposition on the time series data to generate seasonal components, trend components and residual components of the time series data, including: a backward signal extraction module, a temperature value determination module, a temperature change rate determination module and a lightning strike location determination module;

[0034] A backscatter signal extraction module is used to obtain backscatter signals collected by the distributed sensing optical fiber integrated in the OPPC cable; wherein each backscatter signal corresponds to a sampling point, and the backscatter signal is generated at the sampling point after the light pulse propagates in the distributed sensing optical fiber, and the backscatter signal includes a Stokes scattered light signal and an anti-Stokes scattered light signal;

[0035] A temperature value determination module, used to determine the current temperature value of each sampling point on the OPPC cable according to the Stokes scattered light signal and the anti-Stokes scattered light signal;

[0036] The temperature change rate determination module is used to determine the temperature change rate of each sampling point according to the current temperature value and the historical temperature value of each sampling point;

[0037] The lightning strike location determination module is used to determine the lightning strike location based on the current temperature value of each sampling point and the temperature change rate of each sampling point.

[0038] Based on the above method embodiment, the present invention provides a corresponding terminal device embodiment;

[0039] Another embodiment of the present invention provides a terminal device, including a processor, a memory, and a computer program stored in the memory and configured to be executed by the processor, and when the processor executes the computer program, a lightning strike location method based on an OPPC cable as described in any one of the embodiments is implemented.

[0040] Based on the above method embodiment, the present invention provides a storage medium embodiment;

[0041] Another embodiment of the present invention provides a storage medium, which includes a stored computer program, wherein when the computer program is running, the device where the storage medium is located is controlled to execute a lightning strike location method based on an OPPC cable as described in any one of the above embodiments.

[0042] The following beneficial effects are achieved by implementing the present invention:

[0043] The present invention discloses a method, device, terminal equipment and storage medium for locating lightning strikes based on OPPC cables. The method collects backscattered signals through distributed sensing optical fibers integrated in the OPPC cables; determines the current temperature value of each sampling point on the OPPC cable according to the Stokes scattered light signal and the anti-Stokes scattered light signal in the backscattered signal; then, determines the temperature change rate of each sampling point according to the current temperature value of each sampling point and the historical temperature value; finally, determines the location of the lightning strike according to the current temperature value of each sampling point and the temperature change rate of each sampling point. Lightning strike positioning is achieved based on distributed optical fiber sensing technology. Distributed optical fiber sensing technology is inherently safe, anti-electromagnetic interference, no electromagnetic radiation, long sensing distance, no blind area, high resolution, and fast response. Compared with the lightning strike positioning method based on lightning strike detection equipment in the prior art, the positioning accuracy and positioning precision are both higher. In addition, the temperature of the sampling point at the lightning strike location will rise rapidly in a short time. The lightning strike location is determined by the temperature change rate, and there is no need to analyze the arrival time of the lightning surge, which further avoids the interference of other electrical equipment and environmental interference, thereby further improving the accuracy of lightning strike positioning. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] Figure 1 The present invention is a flowchart of a method for locating a lightning strike based on an OPPC cable provided in accordance with an embodiment of the present invention.

[0045] Figure 2 It is a structural schematic diagram of a lightning strike locating device based on an OPPC cable provided in one embodiment of the present invention. DETAILED DESCRIPTION

[0046] In order to make the purpose, technical solutions and advantages of this application clearer, the technical solutions in this application will be clearly and completely described below in conjunction with the drawings in the embodiments of this application. Obviously, the described embodiments are part of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0047] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned figure descriptions and any variations thereof are intended to cover non-exclusive inclusions.

[0048] In the description of the embodiments of the present application, the technical terms "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "multiple" is more than two, unless otherwise clearly and specifically defined.

[0049] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations 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.

[0050] In the description of the embodiments of the present application, the term "and / or" is only a description of the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0051] In the description of the embodiments of the present application, the term "multiple" refers to more than two (including two). Similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple pieces" refers to more than two pieces (including two pieces).

[0052] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0053] See also Figure 1 , is a flow chart of a lightning strike location method based on an OPPC cable provided by an embodiment of the present invention, comprising:

[0054] S1. Acquire each backscattered signal collected by the distributed sensing optical fiber integrated in the OPPC cable; wherein each backscattered signal corresponds to a sampling point, and the backscattered signal is generated at the sampling point after the light pulse propagates in the distributed sensing optical fiber, and the backscattered signal includes a Stokes scattered light signal and an anti-Stokes scattered light signal.

[0055] Specifically, in the present invention, a plurality of sampling points are arranged on the distributed sensing optical fiber in the OPPC cable, and an optical pulse signal is emitted into the distributed sensing optical fiber. Each individual sampling point in the optical fiber will scatter a small portion of light backward to form the above-mentioned backscattered signal.

[0056] The backscattered signal includes a Stokes scattered light signal and an anti-Stokes scattered light signal. The Stokes scattered light signal is independent of temperature, but the intensity of the anti-Stokes scattered light signal changes with temperature, and the ratio of the anti-Stokes scattered light signal to the Stokes scattered light signal has a quantitative relationship with the temperature. Therefore, in subsequent steps, the temperature value of each sampling point can be determined based on the Stokes scattered light signal and the anti-Stokes scattered light signal.

[0057] S2. Determine the current temperature value of each sampling point on the OPPC cable according to the Stokes scattered light signal and the anti-Stokes scattered light signal.

[0058] In a preferred embodiment, determining the current temperature value of each sampling point on the OPPC cable according to the Stokes scattered light signal and the anti-Stokes scattered light signal includes:

[0059] The current temperature value is calculated using the following formula:

[0060]

[0061] Where, T is the temperature; h is Planck's constant; K is the Boltzmann constant; Δf is the Raman light frequency increment; I S is the Stokes scattered light signal; I AS is the anti-Stokes scattered light signal; f 0 is the frequency of the accompanying light.

[0062] The current temperature value of each sampling point in the OPPC cable can be calculated by the above formula.

[0063] S3. Determine the temperature change rate of each sampling point according to the current temperature value and the historical temperature value of each sampling point.

[0064] Specifically, the historical temperature value may be the temperature value of the sampling point at the previous moment before the current sampling moment. The temperature change rate of the sampling point may be calculated based on the temperature values ​​at the current moment and the previous moment.

[0065] S4. Determine the location where the lightning strike occurs based on the current temperature value of each sampling point and the temperature change rate of each sampling point.

[0066] In a preferred embodiment, the current temperature value of each sampling point is compared with a preset temperature threshold, and the sampling point with a temperature greater than the temperature threshold is used as the target sampling point;

[0067] For each target sampling point, the temperature change rate of the target sampling point is compared with a preset change rate threshold, and the current temperature value of the target sampling point is compared with the average temperature of other sampling points except the current target sampling point;

[0068] When it is determined that the temperature change rate of the target sampling point is greater than a preset threshold, and the temperature value of the target sampling point is greater than the average temperature of other sampling points except the current target sampling point, the target sampling point is determined to be a lightning strike point;

[0069] The distance between the incident end of the light pulse and the lightning strike point is calculated, and the lightning strike location is determined according to the distance and the location of the incident end of the light pulse.

[0070] Specifically, firstly, the current temperature value of each sampling point is compared with the preset temperature threshold, and the sampling points with a temperature greater than the temperature threshold are selected as the target sampling points. Then, the temperature change rate of the target sampling point is compared with the preset change rate threshold, and the current temperature value is compared with the temperature average of the remaining sampling points. The target sampling point with a temperature change rate greater than the preset threshold and a temperature value greater than the above-mentioned temperature average is determined as the lightning strike point. After the lightning strike point is determined, the specific position of the lightning strike point on the OPPC cable can be determined by calculating the distance between the incident end of the light pulse and the lightning strike point, thereby determining the location where the above-mentioned lightning strike occurs.

[0071] In this embodiment of the present invention, on the basis of the temperature change rate, the location of the lightning strike is determined by adding a feature based on whether the temperature value of the target sampling point is greater than the temperature average of all other sampling points except the target sampling point. This can avoid misjudging the situation where the temperature rises sharply due to a short circuit in the entire OPPC optical cable as a lightning strike event, thereby further ensuring the accuracy of the location of the lightning strike.

[0072] It should be noted that the above temperature threshold and change rate threshold can be adjusted according to actual conditions.

[0073] In a preferred embodiment, the distance between the incident end of the light pulse and the lightning strike point is calculated by the following formula:

[0074]

[0075] In the formula, x i is the distance between the lightning strike point and the incident end of the light pulse; c k is the light propagation speed in the distributed optical fiber; Δt i It is the time difference between the emission of the light pulse and the generation of the backscattered signal at the lightning strike point.

[0076] In order to further ensure the accuracy of lightning strike location positioning, in another embodiment of the present invention, before acquiring each backscattered signal collected by the distributed sensing optical fiber integrated in the OPPC cable, it also includes:

[0077] Obtain meteorological images that characterize weather conditions in the area where the OPPC cable is located;

[0078] Inputting the meteorological image into a preset lightning recognition model so that the lightning recognition model generates a probability of lightning occurrence according to the meteorological image;

[0079] In the case where the probability of lightning occurrence is greater than a preset probability threshold, the step of acquiring each backscattered signal collected by the distributed sensing optical fiber integrated in the OPPC cable is performed.

[0080] Since lightning weather is a relatively complex weather, there are usually weather changes and changes in parameters related to lightning. For example, the probability of lightning occurring on rainy days is higher than on sunny days. When lightning-related parameter changes such as flashes appear in the sky, the probability of lightning occurring is also higher. Therefore, the probability of lightning occurring in the area where the OPPC cable is located can be judged based on the meteorological image of the area where the OPPC cable is located. If the probability of lightning occurring is greater than the probability threshold, it means that there is a high probability that a lightning strike has occurred in the area where the OPPC cable is located at this time, and then the subsequent lightning strike position positioning operation is performed. If the probability of lightning occurring is not greater than the probability threshold, it means that there is a high probability that no lightning strike will occur in the area where the OPPC cable is located at this time, and there is no need to locate the lightning strike position.

[0081] It should be noted that the above probability threshold can be set or adjusted according to the actual structural parameters and application scenarios of the OPPC cable, and is not specifically limited here.

[0082] In addition, the above-mentioned lightning recognition model can be a deep learning network model. Before the meteorological image is input into the preset lightning recognition model, the lightning recognition model needs to be trained, verified and tested based on the historical data set to ensure the recognition accuracy of the lightning recognition model.

[0083] In a preferred embodiment, before inputting the meteorological image into a preset lightning recognition model, it also includes: determining whether the meteorological image is a standard image that meets the lightning recognition standard, if not, not executing subsequent steps, and if so, inputting the meteorological image into the preset lightning recognition model.

[0084] The above lightning identification standards include, but are not limited to: image brightness standards, etc.

[0085] In this embodiment, before performing the lightning location operation, the probability of lightning occurrence in the area where the OPPC cable is located is predicted, which further improves the efficiency and effectiveness of lightning location.

[0086] In order to avoid misjudgment of lightning strike when the lightning strike event does not act on the OPPC optical cable, but the temperature characteristics of the OPPC optical cable show characteristics consistent with the lightning strike event due to other external factors, after determining the location of the lightning strike, in another embodiment of the present invention, the method further includes:

[0087] Inputting the meteorological image into a preset lightning area prediction model so that the lightning area prediction model generates a lightning prediction area according to the meteorological image;

[0088] Determine whether the lightning strike location is within the lightning prediction area;

[0089] If so, it is determined that the lightning strike location is correct; if not, it is determined that the lightning strike location is inaccurate.

[0090] In this embodiment, the reliability of the lightning strike location is verified by using the lightning strike prediction area determined by the meteorological image, which can ensure that the lightning strike location is caused by a lightning strike event rather than other non-lightning strike events, further ensuring the reliability of the lightning strike location.

[0091] It can be understood that the above-mentioned lightning strike prediction area can be a deep learning network model, which is also obtained after training, testing and verification based on the sample set, and will not be elaborated here.

[0092] Optionally, in order to facilitate maintenance personnel or management personnel to promptly know the occurrence of lightning strike, in another embodiment of the present invention, after determining the lightning strike location, the method further includes:

[0093] The lightning strike location, the temperature value at the lightning point, and the temperature change rate are visualized in a display interface, and lightning strike warning information is generated in the display interface in the form of a pop-up window.

[0094] When a lightning strike occurs, a lightning strike warning message is generated in the form of a pop-up window on the visual interface, which can prompt maintenance personnel or management personnel to be informed of the incident in a timely manner, avoid more severe effects of the lightning strike, and improve the response speed of the lightning strike.

[0095] In order to better implement the lightning strike locating method for an OPPC cable in the embodiment of the present invention, based on the lightning strike locating method for an OPPC cable, the embodiment of the present invention further provides a lightning strike locating device for an OPPC cable.

[0096] like Figure 2As shown, an embodiment of the present invention provides a lightning strike location device for an OPPC cable, comprising: a backward signal extraction module, a temperature value determination module, a temperature change rate determination module, and a lightning strike position determination module;

[0097] A backscatter signal extraction module is used to obtain backscatter signals collected by the distributed sensing optical fiber integrated in the OPPC cable; wherein each backscatter signal corresponds to a sampling point, and the backscatter signal is generated at the sampling point after the light pulse propagates in the distributed sensing optical fiber, and the backscatter signal includes a Stokes scattered light signal and an anti-Stokes scattered light signal;

[0098] A temperature value determination module, used to determine the current temperature value of each sampling point on the OPPC cable according to the Stokes scattered light signal and the anti-Stokes scattered light signal;

[0099] The temperature change rate determination module is used to determine the temperature change rate of each sampling point according to the current temperature value and the historical temperature value of each sampling point;

[0100] The lightning strike location determination module is used to determine the lightning strike location based on the current temperature value of each sampling point and the temperature change rate of each sampling point.

[0101] It should be noted that the device embodiments described above are merely schematic, wherein the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the scheme of this embodiment. In addition, in the accompanying drawings of the device embodiments provided by the present invention, the connection relationship between the modules indicates that there is a communication connection between them, which may be specifically implemented as one or more communication buses or signal lines. A person of ordinary skill in the art may understand and implement it without paying any creative effort.

[0102] Those skilled in the art can clearly understand that for the sake of convenience and brevity, the specific working process of the device described above can refer to the corresponding process in the aforementioned method embodiment, and will not be repeated here.

[0103] Another preferred embodiment of the present invention provides a terminal device, including a processor, a memory, and a computer program stored in the memory and configured to be executed by the processor, wherein when the processor executes the computer program, a lightning strike location method based on an OPPC cable as described in any one of the above embodiments is implemented.

[0104] The terminal device may be a computing device such as a desktop computer, a notebook, a PDA, a cloud server, etc. The terminal device may include, but is not limited to, a processor and a memory.

[0105] The processor may be a central processing unit (CPU), other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), field-programmable gate arrays (FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. The general-purpose processor may be a microprocessor or any conventional processor, etc. The processor is the control center of the terminal device, and uses various interfaces and lines to connect various parts of the entire terminal device.

[0106] The memory can be used to store the computer program, and the processor realizes various functions of the terminal device by running or executing the computer program stored in the memory and calling the data stored in the memory. The memory can mainly include a program storage area and a data storage area, wherein the program storage area can store an operating system, at least one application required for a function, etc.; the data storage area can store data created according to the use of the mobile phone, etc. In addition, the memory can include a high-speed random access memory, and can also include a non-volatile memory, such as a hard disk, a memory, a plug-in hard disk, a smart memory card (Smart Media Card, SMC), a secure digital (Secure Digital, SD) card, a flash card (Flash Card), at least one disk storage device, a flash memory device, or other volatile solid-state storage devices.

[0107] Another preferred embodiment of the present invention provides a storage medium, which includes a stored computer program, wherein when the computer program is running, the device where the storage medium is located is controlled to execute any one of the methods for locating lightning strikes for OPPC cables described in the present invention.

[0108] The storage medium is a computer-readable storage medium, and the computer program is stored in the computer-readable storage medium. When the computer program is executed by the processor, the steps of each of the above-mentioned method embodiments can be implemented. Among them, the computer program includes computer program code, and the computer program code can be in source code form, object code form, executable file or some intermediate form. The computer-readable medium may include: any entity or device capable of carrying the computer program code, recording medium, USB flash drive, mobile hard disk, magnetic disk, optical disk, computer memory, read-only memory (ROM), random access memory (RAM), electric carrier signal, telecommunication signal and software distribution medium.

[0109] The above is a preferred embodiment of the present invention. It should be pointed out that a person skilled in the art can make several improvements and modifications without departing from the principle of the present invention. These improvements and modifications are also considered to be within the scope of protection of the present invention.

Claims

1. A method for locating a lightning strike of an OPPC cable, characterized in that: include: Acquire each backscattered signal collected by the distributed sensing optical fiber integrated in the OPPC cable; wherein each backscattered signal corresponds to a sampling point, the backscattered signal is generated at the sampling point after the light pulse propagates in the distributed sensing optical fiber, and the backscattered signal includes a Stokes scattered light signal and an anti-Stokes scattered light signal; Determine the current temperature value of each sampling point on the OPPC cable according to the Stokes scattered light signal and the anti-Stokes scattered light signal; Determine the temperature change rate of each sampling point based on the current temperature value and historical temperature value of each sampling point; The location where the lightning strike occurs is determined based on the current temperature value of each sampling point and the temperature change rate of each sampling point.

2. The method for locating a lightning strike of an OPPC cable according to claim 1, characterized in that: Determining the current temperature value of each sampling point on the OPPC cable according to the Stokes scattered light signal and the anti-Stokes scattered light signal includes: The current temperature value is calculated using the following formula: Where, T is the temperature; h is Planck's constant; K is the Boltzmann constant; Δf is the Raman light frequency increment; I S is the Stokes scattered light signal; I AS is the anti-Stokes scattered light signal; f0 is the frequency of the accompanying light.

3. The method for locating a lightning strike of an OPPC cable as claimed in claim 2, characterized in that: Determining the lightning strike location according to the current temperature value of each sampling point and the temperature change rate of each sampling point includes: Compare the current temperature value of each sampling point with a preset temperature threshold, and take the sampling point with a temperature greater than the threshold as the target sampling point; For each target sampling point, the temperature change rate of the target sampling point is compared with a preset change rate threshold, and the current temperature value of the target sampling point is compared with the average temperature of other sampling points except the current target sampling point; When it is determined that the temperature change rate of the target sampling point is greater than a preset threshold, and the temperature value of the target sampling point is greater than the average temperature of other sampling points except the current target sampling point, the target sampling point is determined to be a lightning strike point; The distance between the incident end of the light pulse and the lightning strike point is calculated, and the lightning strike location is determined according to the distance and the location of the incident end of the light pulse.

4. The method for locating a lightning strike of an OPPC cable as claimed in claim 3, characterized in that: The distance between the incident end of the light pulse and the lightning strike point is calculated by the following formula: In the formula, x i is the distance between the lightning strike point and the incident end of the light pulse; c k is the light propagation speed in the distributed optical fiber; Δt i It is the time difference between the emission of the light pulse and the generation of the backscattered signal at the lightning strike point.

5. The method for locating a lightning strike of an OPPC cable as claimed in claim 4, characterized in that: Before acquiring each backscattered signal collected by the distributed sensing optical fiber integrated in the OPPC cable, it also includes: Obtain meteorological images that characterize weather conditions in the area where the OPPC cable is located; Inputting the meteorological image into a preset lightning recognition model so that the lightning recognition model generates a probability of lightning occurrence according to the meteorological image; In the case where the probability of lightning occurrence is greater than a preset probability threshold, the step of acquiring each backscattered signal collected by the distributed sensing optical fiber integrated in the OPPC cable is performed.

6. The method for locating a lightning strike of an OPPC cable according to claim 5, characterized in that: After determining the location of the lightning strike, it also includes: Inputting the meteorological image into a preset lightning area prediction model so that the lightning area prediction model generates a lightning prediction area according to the meteorological image; Determine whether the lightning strike location is within the lightning prediction area; If so, it is determined that the lightning strike location is correct; if not, it is determined that the lightning strike location is inaccurate.

7. The method for locating a lightning strike of an OPPC cable according to claim 6, characterized in that: After determining the lightning strike location, it also includes: The lightning strike location, the temperature value at the lightning point, and the temperature change rate are visualized in a display interface, and lightning strike warning information is generated in the display interface in the form of a pop-up window.

8. A lightning strike location device for an OPPC cable, characterized in that: include: A backward signal extraction module, a temperature value determination module, a temperature change rate determination module, and a lightning strike position determination module; A backscatter signal extraction module is used to obtain backscatter signals collected by the distributed sensing optical fiber integrated in the OPPC cable; wherein each backscatter signal corresponds to a sampling point, and the backscatter signal is generated at the sampling point after the light pulse propagates in the distributed sensing optical fiber, and the backscatter signal includes a Stokes scattered light signal and an anti-Stokes scattered light signal; A temperature value determination module, used to determine the current temperature value of each sampling point on the OPPC cable according to the Stokes scattered light signal and the anti-Stokes scattered light signal; The temperature change rate determination module is used to determine the temperature change rate of each sampling point according to the current temperature value and the historical temperature value of each sampling point; The lightning strike location determination module is used to determine the lightning strike location based on the current temperature value of each sampling point and the temperature change rate of each sampling point.

9. A terminal device, characterized in that: The invention comprises a processor, a memory and a computer program stored in the memory and configured to be executed by the processor, wherein when the processor executes the computer program, the method for locating a lightning strike of an OPPC cable as claimed in any one of claims 1 to 7 is implemented.

10. A storage medium, characterized in that: The storage medium includes a stored computer program, wherein when the computer program is executed, the device where the storage medium is located is controlled to execute the lightning locating method for the OPPC cable according to any one of claims 1 to 7.

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