Optical fiber line fault identification method and device

Abstract

The present invention discloses a method and apparatus for optical fiber line fault identification. The method comprises: obtaining a scattered signal from at least one location to be detected in the optical fiber line to be identified; analyzing the scattered signal based on a preset analysis model to determine time-domain distribution information of the power corresponding to the scattered signal, wherein the preset analysis model is determined based on the relationship between the transmission power and transmission distance of the optical pulse corresponding to the scattered signal, as well as distributed amplification information of the scattered signal; and identifying an abnormal location from the at least one location to be detected based on the time-domain distribution information. The present invention solves the technical problem of poor accuracy in optical fiber line fault identification in the prior art.

Description

Technical Field

[0001] The present invention relates to the field of power detection, and in particular to a method and device for identifying faults in optical fiber lines. Background Art

[0002] Economic and social development is increasingly dependent on electricity, placing increasing demands on the quality of communication transmission on fiber-optic lines. During the operation of power transmission networks, fiber-optic lines need to be monitored to ensure the stability of communication systems. Currently, the technologies used to monitor fiber-optic communication lines suffer from low sensitivity and poor accuracy in identifying faults. Furthermore, the monitoring distance is limited, making it unable to meet the distance requirements for monitoring ultra-long-distance power fiber-optic communication systems.

[0003] To address the above-mentioned problems, no effective solutions have been proposed so far. Summary of the Invention

[0004] The embodiments of the present invention provide a method and device for identifying optical fiber line faults, so as to at least solve the technical problem of poor accuracy in optical fiber line fault identification in the prior art.

[0005] According to one aspect of an embodiment of the present invention, a method for fault identification of an optical fiber line is provided, comprising: obtaining a scattered signal from at least one to-be-detected location in the optical fiber line to be identified; analyzing the scattered signal based on a preset analysis model to determine time-domain distribution information of the power corresponding to the scattered signal, wherein the preset analysis model is determined based on the relationship between the transmission power and the transmission distance of the optical pulse corresponding to the scattered signal, and distributed amplification information of the scattered signal; and identifying an abnormal location from the at least one to-be-detected location based on the time-domain distribution information.

[0006] Optionally, the fault identification method for the optical fiber line also includes: obtaining distributed amplification information of the scattered signal; constructing a transmission equation of the scattered signal in the optical fiber line based on the distributed amplification information, and determining the boundary conditions of the transmission equation; determining the parameters of the preset analysis model based on the transmission equation and the boundary conditions; and constructing the preset analysis model based on the parameters of the preset analysis model.

[0007] Optionally, the optical fiber line fault identification method also includes: analyzing the scattered signal based on a preset analysis model to obtain the relationship between the power corresponding to the scattered signal and the transmission distance; based on the relationship between the power corresponding to the scattered signal and the transmission distance, determining the time domain distribution information of the power corresponding to the scattered signal.

[0008] Optionally, the fault identification method for the optical fiber line also includes: obtaining the power at the previous moment and the power at the next moment in the time domain distribution information, wherein the previous moment and the next moment are adjacent moments; calculating the difference between the power at the previous moment and the power at the next moment to obtain the power difference; and identifying the abnormal position from at least one position to be detected based on the power difference.

[0009] Optionally, the optical fiber line fault identification method further includes: when the power difference is greater than a threshold, determining a transmission distance corresponding to the power difference; and determining a location where the abnormality occurs in at least one location to be detected based on the transmission distance.

[0010] Optionally, the optical fiber line fault identification method also includes: filtering the scattered signal to obtain a processed scattered signal; converting the frequency of the processed scattered signal to obtain an intermediate frequency signal, wherein the intermediate frequency signal is a signal corresponding to a preset frequency; and demodulating the intermediate frequency signal to obtain a power corresponding to the scattered signal.

[0011] According to another aspect of an embodiment of the present invention, a fault identification device for an optical fiber line is also provided, including: an acquisition module for acquiring a scattered signal from at least one to-be-detected position in the optical fiber line to be identified; a determination module for analyzing the scattered signal based on a preset analysis model to determine time-domain distribution information of the power corresponding to the scattered signal, wherein the preset analysis model is determined based on the relationship between the transmission power and the transmission distance of the optical pulse corresponding to the scattered signal, and the distributed amplification information of the scattered signal; and an identification module for identifying an abnormal position from at least one to-be-detected position based on the time-domain distribution information.

[0012] According to another aspect of an embodiment of the present invention, a computer-readable storage medium is provided, in which a computer program is stored. The computer program is configured to execute the above-mentioned optical fiber line fault identification method when running.

[0013] According to another aspect of an embodiment of the present invention, an electronic device is also provided, which includes one or more processors; a memory for storing one or more programs, which, when the one or more programs are executed by the one or more processors, enables the one or more processors to run the programs, wherein the programs are configured to execute the above-mentioned optical fiber line fault identification method when running.

[0014] According to another aspect of an embodiment of the present invention, a computer program product is provided, including a computer program / instruction, which implements the above-mentioned optical fiber line fault identification method when executed by a processor.

[0015] In an embodiment of the present invention, optical fiber line fault identification is performed based on scattered signals at locations to be detected. The method involves obtaining scattered signals from at least one location to be detected in the optical fiber line to be identified, analyzing the scattered signals based on a preset analysis model to determine time-domain distribution information of the power corresponding to the scattered signals, and then identifying an abnormal location within the at least one location to be detected based on this time-domain distribution information. The preset analysis model is determined based on the relationship between the transmission power and transmission distance of the optical pulse corresponding to the scattered signals, as well as distributed amplification information of the scattered signals.

[0016] In the above process, by acquiring a scattered signal from at least one location to be inspected in the optical fiber line to be identified, distributed amplification information of the scattered signal can be further obtained. By analyzing the scattered signal based on a preset analysis model, the time-domain distribution information of the power corresponding to the scattered signal can be determined, thus achieving the conversion of the scattered signal and laying the foundation for optical fiber line fault identification. Furthermore, by identifying abnormal locations from at least one location to be inspected based on this time-domain distribution information, the accuracy of optical fiber line fault identification can be improved, thereby solving the problem of optical fiber line fault identification under distributed amplification conditions.

[0017] It can be seen that the solution provided in this application achieves the purpose of fault identification of distributed amplified optical fiber communication lines, thereby achieving the technical effect of improving the accuracy of fault identification of optical fiber lines, and further solving the technical problem of poor fault identification accuracy of optical fiber lines in the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of this application. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0019] Figure 1 is a flow chart of an optional optical fiber line fault identification method according to an embodiment of the present invention;

[0020] Figure 2 is a schematic diagram of an optional evolution model according to an embodiment of the present invention;

[0021] Figure 3 is a schematic diagram of an optional characteristic of Rayleigh backscattering power in a Raman amplification gain region according to an embodiment of the present invention;

[0022] Figure 4 1 is a schematic diagram of the evolution relationship between the Rayleigh scattering power corresponding to the optical fiber breakpoint and the distance according to an embodiment of the present invention;

[0023] Figure 5Schematic diagram of an optional optical fiber line fault identification device according to an embodiment of the present invention. DETAILED DESCRIPTION

[0024] In order to enable those skilled in the art to better understand the solutions of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the embodiments described 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 ordinary technicians in this field without making creative efforts should fall within the scope of protection of the present invention.

[0025] It should be noted that the terms "first", "second", etc. in the description and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that the numbers used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0026] Example 1

[0027] According to an embodiment of the present invention, an embodiment of a method for identifying faults in an optical fiber line is provided. It should be noted that the steps shown in the flowchart of the accompanying drawings can be executed in a computer system such as a set of computer-executable instructions, and although a logical order is shown in the flowchart, in some cases, the steps shown or described can be executed in an order different from that shown here.

[0028] Figure 1 FIG. 1 is a flow chart of a method for identifying a fault in an optical fiber line according to an embodiment of the present invention. Figure 1 As shown, the method includes the following steps:

[0029] Step S102: Acquire a scattered signal of at least one location to be detected in the optical fiber line to be identified.

[0030] In the above steps, a scattered signal from at least one location to be detected in the optical fiber line to be identified can be obtained using a computing device, an application system, or a server. In this embodiment, a computing device is used to obtain the scattered signal from at least one location to be detected in the optical fiber line to be identified. Specifically, the computing device can obtain the scattered signal from at least one location to be detected using devices or components such as an optical time domain analyzer and a sensor. Optionally, in this embodiment, a coherent optical time domain reflectometer is used to obtain the scattered signal from at least one location to be detected.

[0031] It should be noted that the scattered signal of at least one position to be detected in the optical fiber line to be identified can provide a data basis for subsequent conversion of the scattered signal, thereby ensuring smooth subsequent analysis of the scattered signal.

[0032] In step S104, the scattered signal is analyzed based on a preset analysis model to determine the time domain distribution information of the power corresponding to the scattered signal, wherein the preset analysis model is determined based on the relationship between the transmission power and the transmission distance of the optical pulse corresponding to the scattered signal, and the distributed amplification information of the scattered signal.

[0033] In the above steps, after obtaining a scattered signal from at least one location to be detected using coherent optical time-domain reflectometry, a preset analysis model is determined based on the relationship between the transmission power and transmission distance of the optical pulse corresponding to the scattered signal, as well as the distributed amplification information of the scattered signal. The scattered signal is then analyzed using the preset analysis model to obtain time-domain distribution information of the power corresponding to the scattered signal. Optionally, the scattered signal may be a Rayleigh backscattered signal, and the time-domain distribution information may be a detection curve.

[0034] It should be noted that by analyzing the scattered signals using a preset analysis model, the situation of at least one location to be detected in the optical fiber line to be identified can be grasped, laying the foundation for subsequent identification of abnormal locations.

[0035] Step S106: identifying an abnormal location from at least one location to be detected based on the time domain distribution information.

[0036] In the above steps, the time domain distribution information, ie, the data in the detection curve, may be calculated based on a numerical solution algorithm or other methods, and then an abnormal position may be identified from at least one position to be detected based on the calculated data.

[0037] It should be noted that the time domain distribution information can intuitively display the situation of at least one location to be detected in the optical fiber line to be identified, thereby improving the accuracy of fault identification of the optical fiber line.

[0038] Based on the scheme defined in steps S102 to S106 above, it can be seen that in an embodiment of the present invention, a method for identifying optical fiber line faults based on scattered signals at locations to be detected is used. The method involves obtaining scattered signals at at least one location to be detected in the optical fiber line to be identified, first analyzing the scattered signals based on a preset analysis model to determine time-domain distribution information of the power corresponding to the scattered signals, and then identifying an abnormal location from the at least one location to be detected based on the time-domain distribution information. The preset analysis model is determined based on the relationship between the transmission power and transmission distance of the optical pulse corresponding to the scattered signals, as well as distributed amplification information of the scattered signals.

[0039] It is readily apparent that, in the aforementioned process, by acquiring a scattered signal from at least one location to be inspected within the optical fiber line to be identified, distributed amplification information of the scattered signal can be further obtained. By analyzing the scattered signal based on a preset analysis model, the time-domain distribution information of the power corresponding to the scattered signal can be determined, thereby achieving conversion of the scattered signal and laying the foundation for optical fiber line fault identification. Furthermore, identifying abnormal locations within at least one location to be inspected based on this time-domain distribution information can improve the accuracy of optical fiber line fault identification, thereby resolving the problem of optical fiber line fault identification under distributed amplification conditions.

[0040] It can be seen that the solution provided in this application achieves the purpose of fault identification of distributed amplified optical fiber communication lines, thereby achieving the technical effect of improving the accuracy of fault identification of optical fiber lines, and further solving the technical problem of poor fault identification accuracy of optical fiber lines in the prior art.

[0041] In an optional embodiment, before analyzing the scattered signal based on a preset analysis model and determining the time domain distribution information of the power corresponding to the scattered signal, the distributed amplification information of the scattered signal is first obtained, and then the transmission equation of the scattered signal in the optical fiber line is constructed based on the distributed amplification information, and the boundary conditions of the transmission equation are determined. Then, based on the transmission equation and the boundary conditions, the parameters of the preset analysis model are determined, and then the preset analysis model is constructed based on the parameters of the preset analysis model.

[0042] Alternatively, the distributed amplification information of the scattered signal can be obtained using a computing device, an application system, or a server. In this embodiment, the computing device is used to obtain the distributed amplification information of the scattered signal. Optionally, the distributed amplification information can be information related to the Raman amplifier, such as a gain coefficient, pump power, etc.

[0043] Furthermore, a transmission equation of the scattered signal in the optical fiber line is constructed based on the distributed amplification information. Optionally, a Raman transmission equation as shown below is constructed:

[0044]

[0045]

[0046]

[0047]

[0048]

[0049] Among them, the superscripts “+” and “-” represent the forward transmission and backward transmission of the scattered signal, respectively, and the subscripts “1”, “2” and “S” represent the first-order pump, second-order pump and signal, respectively. Pi ” represents the pump power, “P S " indicates signal power, "N S " represents the noise power at the signal frequency, "g i " represents the corresponding Raman gain coefficient, "h" represents the Planck constant, and "K B ” denotes the Boltzmann constant, and “T” denotes the absolute temperature.

[0050] Furthermore, the boundary conditions of the Raman transmission equation are expressed as follows:

[0051]

[0052] P s (0) = P lN

[0053] Among them, "R1" and "R2" are the reflection coefficients of the front-end and end periodic units of the fiber Bragg grating respectively (usually close to 99%), and "L" represents the transmission span.

[0054] Furthermore, according to the transmission equation and boundary conditions, the parameters of the preset analysis model are determined, and then the preset analysis model is constructed based on the parameters of the preset analysis model. Optionally, the preset analysis model can be an evolution model of the power corresponding to the backscattered Rayleigh scattering signal with distance under distributed Raman amplification conditions. For example, Figure 2 is a schematic diagram of an alternative evolutionary model.

[0055] Specifically, the equation of the preset analysis model is constructed by using the aforementioned Raman transmission equation and its boundary conditions. That is, under the condition of distributed Raman amplification, the evolution model of the power corresponding to the scattered signal with distance is expressed by the following formula:

[0056]

[0057] It should be noted that by establishing a preset analysis model, a foundation is laid for the subsequent accurate fault identification of optical fiber lines.

[0058] In an optional embodiment, in the process of analyzing the scattered signal based on a preset analysis model to determine the time domain distribution information of the power corresponding to the scattered signal, the scattered signal is first analyzed based on the preset analysis model to obtain the relationship between the power corresponding to the scattered signal and the transmission distance, and then based on the relationship between the power corresponding to the scattered signal and the transmission distance, the time domain distribution information of the power corresponding to the scattered signal is determined.

[0059] Optionally, in this embodiment, a coherent optical time-domain reflectometer is used to obtain a detection curve for at least one location to be detected in an optical fiber line. Specifically, the laser light emitted by the coherent optical time-domain reflectometer is split into two beams by a coupler. One beam is modulated into a detection light pulse by an acousto-optic modulator and then injected into the optical fiber line to be identified through a coupler. The other beam serves as the local oscillator light. Furthermore, the backscattered Rayleigh signal of the detection light pulse in the optical fiber line to be identified is mixed with the local oscillator light through another coupler. The mixed signal is then amplified and analog-to-digital converted after passing through a balanced detector. Finally, the power corresponding to the scattered signal is demodulated by a digital signal processing unit, thereby obtaining a detection curve corresponding to the at least one location to be detected.

[0060] Furthermore, the scattering signal is analyzed by the above preset analysis model, ie, the evolution model, to obtain the relationship between the power corresponding to the scattering signal and the transmission distance. Figure 3 is a schematic diagram of the characteristics of the optional backscattered Rayleigh power in the Raman amplification gain region, further, combined with Figure 3 The above evolution model can be used to obtain detailed fault information of the optical fiber line in the Raman gain region, wherein the detailed fault information includes but is not limited to breakpoints, fusion points, bends, etc.

[0061] Furthermore, based on the relationship between the power corresponding to the scattered signal and the transmission distance, the time-domain distribution information of the power corresponding to the scattered signal is determined. Specifically, the detection curve corresponding to the power of the scattered signal is determined from the detection curve corresponding to the at least one location to be detected using the acquired fault detail information. For example, when there is a break in the optical fiber line, the detection curve corresponding to the power of the scattered signal at that break will show a downward trend.

[0062] It should be noted that by analyzing the scattered signal based on the preset analysis model, a theoretical basis can be provided for optical fiber line fault identification, avoiding blind identification of optical fiber line faults, thereby improving the accuracy of optical fiber line fault identification.

[0063] In an optional embodiment, in the process of identifying an abnormal location from at least one location to be detected based on the time-domain distribution information, first, the power at a previous moment and the power at a subsequent moment in the time-domain distribution information are obtained, then the difference between the power at the previous moment and the power at the subsequent moment is calculated to obtain a power difference, and then the abnormal location is identified from the at least one location to be detected based on the power difference, where the previous moment and the subsequent moment are adjacent moments.

[0064] Optionally, when there is a fault in the optical fiber line, the detection curve of the power corresponding to the scattered signal at the fault location will show a downward trend. Therefore, by obtaining the power at adjacent moments in the detection curve and then taking the difference between the two powers, it can be determined whether the detection curve shows a downward trend based on the power difference.

[0065] In an optional embodiment, in the process of identifying an abnormal location from at least one location to be detected based on a power difference, when the power difference is greater than a threshold, the transmission distance corresponding to the power difference is determined, and then based on the transmission distance, the location where the abnormality occurs in at least one location to be detected is determined.

[0066] Optionally, a threshold value is set for determining the power difference. That is, when the power difference value is greater than the threshold value, it is determined that an abnormality has occurred in at least one of the locations to be inspected on the optical fiber line to be identified. Furthermore, when the power difference value is less than or equal to the threshold value, it is not determined that an abnormality has occurred in at least one of the locations to be inspected on the optical fiber line to be identified.

[0067] Furthermore, when the power difference is greater than a threshold, that is, when an abnormality occurs in at least one of the positions to be detected in the optical fiber line to be identified, the transmission distance corresponding to the power difference can be obtained through the above-mentioned evolution model, and then the position where the abnormality occurs can be determined from the at least one position to be detected based on the transmission distance. For example, Figure 4 This is an optional diagram of the evolution of the Rayleigh scattering power corresponding to the optical fiber breakpoint with distance, such as Figure 4 As shown, when there is a breakpoint in at least one of the positions to be detected in the optical fiber line to be identified, the breakage of the optical fiber causes extreme attenuation of the signal, and the attenuation causes the Rayleigh scattering power of the signal to drop extremely. At this time, the transmission distance corresponding to the power drop position is 270 km, and the position where the abnormality occurs can be determined to be 270 km from at least one of the positions to be detected.

[0068] It should be noted that, by identifying an abnormal position from at least one position to be detected through the power difference, accurate identification of the fault position of the optical fiber line to be identified is achieved.

[0069] In an optional embodiment, after obtaining a scattered signal from at least one location to be detected in the optical fiber line to be identified, the scattered signal is first filtered to obtain a processed scattered signal. The frequency of the processed scattered signal is then converted to obtain an intermediate frequency signal. The intermediate frequency signal is then demodulated to obtain the power corresponding to the scattered signal. The intermediate frequency signal is a signal corresponding to a preset frequency.

[0070] Specifically, the useful information of the scattered signal is concentrated in the intermediate frequency part, while the rest contains a large amount of noise. Therefore, after obtaining the scattered signal of at least one location to be detected through coherent optical time-domain reflectometry, it is necessary to filter the scattered signal and then use the coherent detection method to convert the processed scattered signal into an intermediate frequency signal of a fixed frequency. The intermediate frequency signal is then demodulated to obtain the power corresponding to the scattered signal.

[0071] It should be noted that the above process can reduce the noise in the line, thereby improving the accuracy of fault identification of the optical fiber line, and can also improve the sensitivity of the scattered signal receiving end, thereby increasing the detection distance.

[0072] It can be seen that the solution provided in this application achieves the purpose of fault identification of distributed amplified optical fiber communication lines, thereby achieving the technical effect of improving the accuracy of fault identification of optical fiber lines, and further solving the technical problem of poor fault identification accuracy of optical fiber lines in the prior art.

[0073] Example 2

[0074] According to an embodiment of the present invention, an embodiment of a device for identifying a fault of an optical fiber line is provided, wherein: Figure 5 FIG. 1 is a schematic diagram of a fault identification device for an optical fiber line according to an embodiment of the present invention. Figure 5 As shown, the device includes: an acquisition module 501, used to acquire a scattered signal from at least one to-be-detected position in an optical fiber line to be identified; a determination module 502, used to analyze the scattered signal based on a preset analysis model to determine time-domain distribution information of the power corresponding to the scattered signal, wherein the preset analysis model is determined based on the relationship between the transmission power and the transmission distance of the optical pulse corresponding to the scattered signal, as well as the distributed amplification information of the scattered signal; and an identification module 503, used to identify an abnormal position from at least one to-be-detected position based on the time-domain distribution information.

[0075] It should be noted that the above-mentioned acquisition module 501, determination module 502 and identification module 503 correspond to steps S102 to S106 in the above-mentioned embodiment. The examples and application scenarios implemented by the three modules and the corresponding steps are the same, but are not limited to the contents disclosed in the above-mentioned embodiment 1.

[0076] Example 3

[0077] According to another aspect of an embodiment of the present invention, a computer-readable storage medium is provided, in which a computer program is stored. The computer program is configured to execute the above-mentioned optical fiber line fault identification method when running.

[0078] Example 4

[0079] According to another aspect of an embodiment of the present invention, an electronic device is provided, wherein: Figure 4 is a schematic diagram of an optional electronic device according to an embodiment of the present invention, such as Figure 4 As shown, the electronic device includes one or more processors; a memory for storing one or more programs, which, when executed by the one or more processors, enables the one or more processors to run the programs, wherein the programs are configured to execute the above-mentioned optical fiber line fault identification method when running.

[0080] Example 5

[0081] According to another aspect of an embodiment of the present invention, a computer program product is provided, including a computer program / instruction. When the computer program / instruction is executed by a processor, the above-mentioned optical fiber line fault identification method is implemented.

[0082] The serial numbers of the above embodiments of the present invention are for description only and do not represent the advantages or disadvantages of the embodiments.

[0083] In the above embodiments of the present invention, the description of each embodiment has its own focus. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0084] In the several embodiments provided in this application, it should be understood that the disclosed technical content can be implemented in other ways. Among them, the device embodiments described above are only exemplary. For example, the division of units can be a logical function division. In actual implementation, there may be other division methods, 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 through some interfaces, indirect coupling or communication connection of units or modules, which can be electrical or other forms.

[0085] Units described as separate components may or may not be physically separate, and components shown as units may or may not be physical units, that is, they may be located in one place or distributed across multiple units. Some or all of the units may be selected to achieve the purpose of the present embodiment according to actual needs.

[0086] In addition, the functional units in the various embodiments of the present invention may be integrated into a single processing unit, each unit may exist physically separately, or two or more units may be integrated into a single unit. The aforementioned integrated units may be implemented in the form of hardware or software functional units.

[0087] 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, 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 medium and includes several instructions for enabling a computer device (which can be a personal computer, server or network device, etc.) to execute all or part of the steps of the methods of each embodiment of the present invention. The aforementioned storage medium includes: U disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), mobile hard disk, magnetic disk or optical disk, etc. Various media that can store program codes.

[0088] The above are only preferred embodiments of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A method for identifying optical fiber line faults, characterized in that: include: Acquiring a scattered signal of at least one location to be detected in the optical fiber line to be identified; Analyzing the scattered signal based on a preset analysis model to determine time-domain distribution information of power corresponding to the scattered signal, wherein the preset analysis model is determined based on a relationship between transmission power and transmission distance of an optical pulse corresponding to the scattered signal, and distributed amplification information of the scattered signal; Identifying an abnormal position from the at least one position to be detected based on the time domain distribution information includes: obtaining the power of a previous moment and the power of a next moment in the time domain distribution information, wherein the previous moment and the next moment are adjacent moments; calculating the difference between the power of the previous moment and the power of the next moment to obtain a power difference; and identifying an abnormal position from the at least one position to be detected based on the power difference.

2. The method according to claim 1, characterized in that Before analyzing the scattered signal based on a preset analysis model to determine time domain distribution information of power corresponding to the scattered signal, the method further includes: Obtaining distributed amplification information of the scattered signal; Constructing a transmission equation of the scattered signal in the optical fiber line based on the distributed amplification information, and determining boundary conditions of the transmission equation; Determining parameters of the preset analysis model according to the transmission equation and the boundary conditions; The preset analysis model is constructed based on the parameters of the preset analysis model.

3. The method according to claim 1, characterized in that Analyzing the scattered signal based on a preset analysis model to determine time domain distribution information of power corresponding to the scattered signal includes: Analyzing the scattered signal based on the preset analysis model to obtain a relationship between the power corresponding to the scattered signal and the transmission distance; Based on the relationship between the power corresponding to the scattered signal and the transmission distance, time domain distribution information of the power corresponding to the scattered signal is determined.

4. The method according to claim 1, wherein Identifying an abnormal location from the at least one location to be detected based on the power difference, comprising: When the power difference is greater than a threshold, determining a transmission distance corresponding to the power difference; Based on the transmission distance, a position where an abnormality occurs in the at least one position to be detected is determined.

5. The method according to claim 1, characterized in that After obtaining the scattered signal of at least one location to be detected in the optical fiber line to be identified, the method further includes: performing filtering processing on the scattered signal to obtain a processed scattered signal; Converting the frequency of the processed scattered signal to obtain an intermediate frequency signal, wherein the intermediate frequency signal is a signal corresponding to a preset frequency; The intermediate frequency signal is demodulated to obtain the power corresponding to the scattered signal.

6. A device for identifying optical fiber line faults, characterized in that: include: An acquisition module, configured to acquire a scattered signal from at least one location to be detected in an optical fiber line to be identified; a determination module, configured to analyze the scattered signal based on a preset analysis model to determine time-domain distribution information of power corresponding to the scattered signal, wherein the preset analysis model is determined based on a relationship between transmission power and transmission distance of an optical pulse corresponding to the scattered signal, and distributed amplification information of the scattered signal; An identification module, used to identify an abnormal position from the at least one position to be detected based on the time domain distribution information, including: obtaining the power of a previous moment and the power of a next moment in the time domain distribution information, wherein the previous moment and the next moment are adjacent moments; calculating the difference between the power of the previous moment and the power of the next moment to obtain a power difference; and identifying the abnormal position from the at least one position to be detected based on the power difference.

7. A computer-readable storage medium, characterized in that The computer-readable storage medium stores a computer program, wherein the computer program is configured to execute the optical fiber line fault identification method according to any one of claims 1 to 5 when running.

8. An electronic device, characterized in that: The electronic device includes one or more processors; A memory for storing one or more programs, which, when executed by the one or more processors, enables the one or more processors to run the programs, wherein the programs are configured to execute the optical fiber line fault identification method described in any one of claims 1 to 5 when run.

9. A computer program product comprising a computer program / instructions, characterized in that When the computer program / instructions are executed by a processor, the optical fiber line fault identification method according to any one of claims 1 to 5 is implemented.

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