Fiber data processing method and system based on botdr, electronic equipment and storage medium

Abstract

The application relates to the technical field of optical fiber sensing, and relates to an optical fiber data processing method and system based on BOTDR, an electronic device and a storage medium, which comprise the following steps: acquiring a to-be-processed time domain signal of an optical fiber through BOTDR; dividing the to-be-processed time domain signal into first signal segments of a plurality of frequency ranges; performing down-conversion processing on the first signal segments to obtain second signal segments corresponding to the first signal segments; converting the second signal segments into corresponding frequency domain signal segments; performing frequency shift on the frequency domain signal segments according to the frequency ranges of the corresponding first signal segments; splicing the frequency-shifted frequency domain signal segments to obtain spliced frequency domain signals; and acquiring a Brillouin frequency domain curve according to the spliced frequency domain signals. Compared with the prior art, the first signal segments are converted into second signal segments with lower frequencies, and in the process of converting the second signal segments into corresponding frequency domain signal segments, an ADC with a high sampling rate is not needed, thereby effectively reducing the equipment cost of sampling.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of optical fiber sensing, and more particularly to an optical fiber data processing method and system based on BOTDR, an electronic device and a storage medium. BACKGROUND

[0002] With the continuous development of optical fiber technology, optical fiber sensing technology is widely used in various industries to detect faults or abnormalities. Among them, BOTDR (Brillouin Optical Time Domain Reflectometer) technology is widely used in the field of optical fiber sensing. BOTDR technology can realize distributed measurement of physical quantities such as temperature and stress along the optical fiber. However, the traditional processing of BOTDR signals usually needs to set a high sampling rate ADC (Analog-to-Digital Converter), and the device cost of high sampling rate ADC is high, and the processing efficiency is low, which is difficult to meet the needs of wide deployment and efficient processing. SUMMARY

[0003] The present application provides an optical fiber data processing method and system based on BOTDR, an electronic device and a storage medium, which can reduce the cost of processing optical fiber data based on BOTDR technology.

[0004] According to a first aspect of the present application, an optical fiber data processing method based on BOTDR is provided, the method comprising:

[0005] acquiring a to-be-processed time domain signal of an optical fiber by BOTDR;

[0006] dividing the to-be-processed time domain signal into a plurality of first signal segments of different frequency ranges;

[0007] respectively performing down-conversion processing on each of the first signal segments to obtain a second signal segment corresponding to each of the first signal segments;

[0008] respectively converting each of the second signal segments into a frequency domain signal segment;

[0009] respectively performing frequency shift on each of the frequency domain signal segments according to the frequency range of the first signal segment corresponding to the frequency domain signal segment;

[0010] splicing the frequency-shifted frequency domain signal segments to obtain a spliced frequency domain signal;

[0011] acquiring a Brillouin frequency domain curve corresponding to the to-be-processed time domain signal according to the spliced frequency domain signal.

[0012] The high-frequency time-domain signal to be processed acquired by the BOTDR is divided into a plurality of first signal segments in a plurality of frequency ranges, and the first signal segments are converted into second signal segments with lower frequencies through down-conversion processing. In the process of converting the second signal segments into corresponding frequency-domain signal segments, a high sampling rate ADC is not needed, and a low sampling rate ADC can be used to process the second signal segments, thereby effectively reducing the sampling cost. Meanwhile, the data of the time-domain signal to be processed is split, the amount of data to be processed by each low sampling rate ADC is reduced, and the data processing efficiency is effectively improved.

[0013] Optionally, the time-domain signal to be processed of the optical fiber acquired by the BOTDR comprises:

[0014] Based on a preset period, the BOTDR is used to collect real-time signals in the optical fiber, and the collected real-time signals are used as the time-domain signal to be processed.

[0015] By periodically collecting real-time signals in the optical fiber, the BOTDR can continuously monitor the changes of the temperature and stress of the optical fiber along the line.

[0016] Optionally, the method further comprises:

[0017] The frequency corresponding to the signal intensity peak in the spliced frequency-domain signal of the current period is compared with the frequency corresponding to the signal intensity peak in the spliced frequency-domain signal of the previous period to obtain a signal frequency shift amount.

[0018] If the signal frequency shift amount does not exceed a preset threshold, the Brillouin frequency-domain curve of the previous period is used as the Brillouin frequency-domain curve of the current period.

[0019] If the signal frequency shift amount exceeds the preset threshold, the spliced frequency-domain signal of the current period is fitted to obtain the Brillouin frequency-domain curve of the current period.

[0020] When the temperature or stress of the optical fiber along the line changes, the signal intensity peak of the Brillouin frequency domain curve will drift, so the change of the temperature or stress of the optical fiber along the line can be obtained by observing the change of the signal intensity peak of the Brillouin frequency domain curve, that is, the signal intensity peak of the spliced frequency domain signal. Therefore, when the change amount of the signal intensity peak does not exceed the preset threshold, it indicates that the temperature or stress does not change significantly, and the Brillouin frequency domain curve of the previous period is directly used; when the change amount of the signal intensity peak exceeds the preset threshold, it indicates that the temperature or stress changes significantly, and the fitting is performed based on the current period of the spliced frequency domain signal, thereby reducing the calculation amount of the fitting calculation of the Brillouin frequency domain curve, reducing the calculation load, and improving the response capability to abnormal temperature and stress changes.

[0021] Optionally, the frequency shifting of each of the frequency domain signal segments according to the frequency range of the first signal segment corresponding to the frequency domain signal segment comprises:

[0022] The frequency difference between the center frequencies of the frequency range of the first signal segment is obtained as the first offset between the frequency domain signal segments corresponding to the first signal segment;

[0023] The frequency domain signal segments are frequency shifted according to the first offset, so that the frequency difference between the center values of the frequency distribution of the frequency shifted frequency domain signal segments is the same as the frequency difference between the center frequencies of the frequency range of the corresponding first signal segment.

[0024] Optionally, the frequency shifting of each of the frequency domain signal segments according to the frequency range of the first signal segment corresponding to the frequency domain signal segment comprises:

[0025] The second offset between the center frequency of the frequency range of each of the first signal segments and the frequency conversion center frequency is obtained; the frequency conversion center frequency is the center value of the frequency distribution of the frequency domain signal segment;

[0026] The frequency domain signal segments are frequency shifted according to the corresponding second offset, so that the frequency distribution of the frequency shifted frequency domain signal segments matches the frequency range of the corresponding first signal segment.

[0027] Optionally, the splicing of the frequency shifted frequency domain signal segments to obtain the spliced frequency domain signal comprises:

[0028] According to the frequency distribution of the frequency shifted frequency domain signal segments, the frequency domain signal segments with coincident frequency points are determined, and the frequency domain signal segments with coincident frequency points are spliced to obtain the spliced frequency domain signal.

[0029] Optionally, the separately down-converting each first signal segment to obtain a second signal segment corresponding to each first signal segment comprises:

[0030] According to the frequency range of the first signal segment, the first signal segment is down-converted at least once to obtain the second signal segment of a preset frequency.

[0031] According to a second aspect of the present application, a BOTDR-based optical fiber data processing system is provided, the system comprising:

[0032] A signal acquisition module is configured to acquire a to-be-processed time-domain signal of an optical fiber by using a BOTDR.

[0033] A signal division module is configured to divide the to-be-processed time-domain signal into a plurality of first signal segments of different frequency ranges.

[0034] A frequency conversion processing module is configured to separately down-convert each first signal segment to obtain a second signal segment corresponding to each first signal segment.

[0035] A frequency domain conversion module is configured to separately convert each second signal segment into a frequency domain signal segment.

[0036] A signal frequency shift module is configured to respectively shift each frequency domain signal segment according to the frequency range of the first signal segment corresponding to the frequency domain signal segment.

[0037] A signal splicing module is configured to splice the frequency-shifted frequency domain signal segments to obtain a spliced frequency domain signal.

[0038] A curve acquisition module is configured to acquire a Brillouin frequency domain curve corresponding to the to-be-processed time-domain signal according to the spliced frequency domain signal.

[0039] According to a third aspect of the present application, an electronic device is provided, comprising:

[0040] A memory is configured to store one or more computer programs.

[0041] A processor is configured to implement the BOTDR-based optical fiber data processing method of the first aspect when the one or more computer programs are executed by the processor.

[0042] According to a fourth aspect of the present application, a computer readable storage medium is provided, the computer readable storage medium storing computer instructions, the computer instructions being configured to enable a processor to implement the BOTDR-based optical fiber data processing method of the first aspect when executed by the processor.

[0043] Based on any one of the above aspects, the BOTDR-based optical fiber data processing method, system, electronic device and computer readable storage medium provided by the embodiments of the present application divide the high-frequency to-be-processed time domain signal obtained by the BOTDR into a plurality of first signal segments of frequency ranges, and convert the first signal segments into second signal segments of lower frequencies through down-conversion processing. In this way, in the process of converting the second signal segments into corresponding frequency domain signal segments, a high sampling rate ADC does not need to be used, and a low sampling rate ADC can be used to process the second signal segments respectively, thereby effectively reducing the sampling cost. At the same time, the data of the to-be-processed time domain signal is split, the amount of data that each low sampling rate ADC needs to process is reduced, and the efficiency of data processing is effectively improved.

[0044] Further, in the process of obtaining the Brillouin frequency domain curve according to the spliced frequency domain signal, by judging the change amount between the spliced frequency domain signal of the current period and the signal intensity peak value of the previous period, when the change amount exceeds the preset threshold, the spliced frequency domain signal of the current period is fitted to obtain the Brillouin frequency domain, otherwise the Brillouin frequency domain curve of the previous period is used as the Brillouin frequency domain curve of the current period, unnecessary fitting calculation is reduced, the calculation burden is reduced, and the efficiency of data processing is improved. BRIEF DESCRIPTION OF DRAWINGS

[0045] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed in the embodiment description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0046] Figure 1 The step flow chart of the optical fiber data processing method provided by the present embodiment.

[0047] Figure 2 The example diagram of splicing the spliced frequency domain signal provided by the present embodiment.

[0048] Figure 3 The module structure schematic diagram of the optical fiber data processing system provided by the present embodiment.

[0049] Figure 4 The device structure schematic diagram of the electronic device provided by the present embodiment. DETAILED DESCRIPTION

[0050] The drawings in the present application are only used for illustrative description, and cannot be understood as a limitation of the present application. In order to better illustrate the following embodiments, some components in the drawings may be omitted, enlarged or reduced, and do not represent the actual size of the product; it can be understood by those skilled in the art that some well-known structures in the drawings and their descriptions may be omitted.

[0051] In order for those skilled in the art to better understand the scheme of the present application, the technical solutions in the embodiments of the present application will be described clearly and completely below in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor should be within the scope of protection of the present application.

[0052] It should be noted that the terms "first", "second" and the like in the specification and claims of the present application and the above-described drawings are used to distinguish similar objects, and do not necessarily indicate a specific order or sequence. It should be understood that the data thus used can be interchanged under appropriate circumstances, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion, for example, a process, method, system, product or device including a series of steps or units does not have to be limited to those steps or units clearly listed, but can include other steps or units not clearly listed or inherent to these processes, methods, products or devices.

[0053] With the continuous development of optical fiber technology, optical fiber sensing technology is widely used in various industries to detect faults or abnormalities. Among them, BOTDR (Brillouin Optical Time Domain Reflectometer) technology is widely used in the field of optical fiber sensing. BOTDR technology can realize distributed measurement of physical quantities such as temperature and stress along the optical fiber. However, the processing of traditional BOTDR signals usually needs to set a high sampling rate ADC (Analog-to-Digital Converter), and the device cost of high sampling rate ADC is high, and the processing efficiency is low, which is difficult to meet the demand of wide deployment and efficient processing.

[0054] At the same time, the core of BOTDR technology is to curve fit each position point sampled on the optical fiber to obtain a Brillouin frequency domain curve. When the length of the optical fiber is long and the number of position points on it is large, a large amount of calculation is required in the process of fitting the Brillouin frequency domain curve, which will cause a large calculation burden, and further affect the real-time performance of the Brillouin frequency domain curve generation.

[0055] The embodiment provides a technical solution which can solve the above problems. The specific implementation of the application is described in detail below with reference to the drawings.

[0056] As shown in Figure 1 The embodiment provides an optical fiber data processing method based on BOTDR, which can include the following steps:

[0057] S1: obtaining a to-be-processed time domain signal of an optical fiber by BOTDR;

[0058] In the embodiment, the BOTDR emits pulsed laser into the optical fiber. During the transmission of the pulsed laser in the optical fiber, the pulsed laser is affected by the temperature change or stress change around the optical fiber along the line, and generates backscattered Brillouin scattering light. The BOTDR acquires the backscattered Brillouin scattering light and analyzes the Brillouin scattering light to obtain the to-be-processed time domain signal.

[0059] It can be understood that the BOTDR continuously monitors the optical fiber, continuously emits pulsed laser to the optical fiber, and continuously acquires and analyzes the returned Brillouin scattering light in the optical fiber to obtain the real-time signal, and then obtains the real-time to-be-processed time domain signal according to the real-time signal.

[0060] In an implementation, the BOTDR can be used to acquire the real-time signal in the optical fiber based on a preset period, and the acquired real-time signal can be used as the to-be-processed time domain signal, so that the BOTDR can acquire continuous to-be-processed time domain signals in the optical fiber for analysis.

[0061] S2: dividing the to-be-processed time domain signal into a plurality of first signal segments of different frequency ranges;

[0062] In the embodiment, the frequency ranges of the first signal segments can be divided based on the same frequency interval, or the frequency ranges of different frequency intervals can be divided according to actual needs. For example, for a to-be-processed time domain signal with a frequency distribution of 1000-1100MHz, it can be divided into four first signal segments with frequency ranges of 1000-1025MHz, 1025-1050MHz, 1050-1075MHz and 1075-1100MHz according to a frequency interval of 25MHz, or it can be divided into four first signal segments with frequency ranges of 1000-1035MHz, 1035-1045MHz, 1045-1077MHz and 1077-1100MHz. Preferably, the to-be-processed time domain signal is divided into a plurality of first signal segments of different frequency ranges based on the same frequency interval.

[0063] S3: respectively, each of the first signal segment is down-converted to obtain the second signal segment corresponding to each of the first signal segment;

[0064] In this embodiment, the first signal segment can be at least once down-converted according to the frequency range of the first signal segment, and the second signal segment of the preset frequency is obtained.

[0065] Wherein, the down-conversion is to move the spectrum of high frequency signal to a lower frequency, usually through mixing and filtering.

[0066] It can be understood that, due to the different frequency ranges of each of the first signal segment, the frequency range of the first signal segment with high frequency can be moved by one or more times down-conversion, so as to reduce the frequency range of each first signal segment to a unified preset frequency, facilitate subsequent uniform sampling processing, and reduce the subsequent ADC sampling rate requirement.

[0067] S4: respectively, each of the second signal segment is converted into a frequency domain signal segment;

[0068] The first signal segment obtained by dividing the to-be-processed time domain signal and the second signal segment after down-conversion still belong to time domain signal, and the time domain signal needs to be converted into frequency domain signal to obtain Brillouin frequency domain curve. Therefore, in this embodiment, the second signal segment is converted into a corresponding frequency domain signal segment.

[0069] In one embodiment, the frequency domain signal segment can include:

[0070] First, the second signal segment is sampled to obtain a digital signal segment; in this embodiment, since the second signal segment is obtained by dividing and converting the to-be-processed time domain signal and down-converting, the frequency of the second signal segment is much lower than that of the high frequency to-be-processed time domain signal, so a lower sampling rate ADC can be used for analog-digital conversion when the second signal segment is sampled. The cost of low sampling rate ADC is lower than that of high sampling rate ADC, thereby effectively reducing the hardware setting cost of data processing process. Wherein, the sampling rate of ADC can be set according to the frequency after down-conversion.

[0071] Then, the digital signal segment is converted into the frequency domain signal segment by fast Fourier transform. By fast Fourier transform, each frequency domain component in the digital signal segment is extracted, and the digital signal segment is converted into a corresponding frequency domain signal segment.

[0072] S5: frequency shift each of the frequency domain signal segments according to the frequency range of the first signal segment corresponding to the frequency domain signal segment;

[0073] In the embodiment, the frequency domain signal segments after frequency down conversion are unified to the same preset frequency, and the frequency domain signal segments are restored to the range of the frequency spectrum after the frequency domain signal segments are acquired, and the frequency distribution of all the frequency domain signal segments is the same, so that the complete information of the original time domain signal to be processed cannot be acquired. Therefore, the frequency domain signal segments need to be frequency shifted, so that the frequency distribution of the original time domain signal to be processed can be restored.

[0074] In an embodiment, the step S5 can include the following steps:

[0075] acquire the frequency difference between the center frequencies of the frequency ranges of the first signal segments as the first offset between the frequency domain signal segments corresponding to the first signal segments; and frequency shift the frequency domain signal segments according to the first offset, so that the frequency difference between the center values of the frequency distribution of the frequency domain signal segments after frequency shift is the same as the frequency difference between the center frequencies of the frequency ranges of the corresponding first signal segments.

[0076] For example, assuming that the center frequencies of the frequency ranges of four first signal segments of 1000-1025 MHz, 1025-1050 MHz, 1050-1075 MHz and 1075-1100 MHz are 1012.5 MHz, 1037.5 MHz, 1062.5 MHz and 1087.5 MHz respectively, the frequency difference between the center frequencies of adjacent frequency ranges is 25 MHz, the first offset is an integer multiple of 25 MHz, and the frequency distribution of each frequency domain signal segment is 0-30 MHz, then the frequency domain signal segment corresponding to the frequency range of 1000-1025 MHz is taken as a basis, the frequency domain signal segment corresponding to the frequency range of 1025-1050 MHz is frequency shifted by 25 MHz to obtain the frequency distribution of 25-55 MHz, the frequency domain signal segment corresponding to the frequency range of 1050-1075 MHz is frequency shifted by 50 MHz to obtain the frequency distribution of 50-80 MHz, and the frequency domain signal segment corresponding to the frequency range of 1075-1100 MHz is frequency shifted by 75 MHz to obtain the frequency distribution of 75-105 MHz.

[0077] In an embodiment, the step S5 can include the following steps:

[0078] obtaining a second offset between the center frequency of the frequency range of each of the first signal segments and the variable frequency center frequency; and frequency-shifting the frequency domain signal segments according to the corresponding second offset, so that the frequency distribution of the frequency-shifted frequency domain signal segments matches the frequency range of the corresponding first signal segments.

[0079] In this embodiment, the variable frequency center frequency is the center value of the frequency distribution of the frequency domain signal segments, and the second offset is the amount of change in the frequency distribution or the frequency range during the conversion of the first signal segments to the corresponding frequency domain signal segments. Therefore, the frequency domain signal segments can be frequency-shifted according to the corresponding second offset, so that the frequency distribution of the frequency domain signal segments is restored to be the same as the frequency range of the corresponding first signal segments.

[0080] It should be noted that the frequency shift described in the above embodiments can be implemented according to the actual use scenario, and will not be described further here.

[0081] S6: Splicing the frequency-shifted frequency domain signal segments to obtain a spliced frequency domain signal.

[0082] In this embodiment, the step S6 can include the following steps:

[0083] According to the frequency distribution of the frequency-shifted frequency domain signal segments, determine the frequency domain signal segments having overlapping frequency points, and splice the frequency domain signal segments having overlapping frequency points to obtain the spliced frequency domain signal. Wherein, the spliced frequency domain signal can refer to Figure 2 .

[0084] It can be understood that, in an ideal state, only the endpoints of the frequency distribution of the frequency-shifted frequency domain signal segments will overlap; however, according to the sampling rate of the ADC used and the division of the frequency range, as Figure 2 indicated, there can be a case of partial frequency overlap between the frequency-shifted frequency domain signal segments. Regardless of which case, it can be understood that when the frequency-shifted frequency domain signal segments overlap, it means that the two frequency domain signal segments are continuous in the frequency domain. Therefore, when two frequency domain signal segments have overlapping frequency points, the two frequency domain signal segments are spliced according to the overlapping frequency points, so that each frequency domain signal segment can restore the frequency range of the to-be-processed time domain signal through splicing.

[0085] S7: Obtaining the Brillouin frequency domain curve corresponding to the to-be-processed time domain signal according to the spliced frequency domain signal.

[0086] In this embodiment, the step S7 can include the following steps:

[0087] comparing the frequency corresponding to the signal strength peak in the spliced frequency domain signal of the current period with the frequency corresponding to the signal strength peak in the spliced frequency domain signal of the previous period to obtain a signal frequency shift amount;

[0088] if the signal frequency shift amount does not exceed a preset threshold, taking the Brillouin frequency domain curve of the previous period as the Brillouin frequency domain curve of the current period;

[0089] if the signal frequency shift amount exceeds the preset threshold, fitting the spliced frequency domain signal of the current period to obtain the Brillouin frequency domain curve of the current period.

[0090] As described above, when the fiber is relatively long, the data of the position points to be processed is relatively large when the Brillouin frequency domain curve is obtained by fitting the spliced frequency domain signal, which increases the burden of calculation and further leads to poor real-time performance of fitting.

[0091] As known, the Brillouin frequency domain curve reflects the changes of temperature and stress along the fiber, and the Brillouin frequency domain curve is obtained by fitting the spliced frequency domain signal. When the temperature or stress along the fiber changes, the frequency in the spliced frequency domain signal will shift, and there is only one signal strength peak in the spliced frequency domain signal, which can be conveniently observed whether the shift occurs based on the frequency of the signal strength peak.

[0092] Therefore, when the signal frequency shift amount of the signal strength peak in the spliced frequency domain signal exceeds the preset threshold, it indicates that the temperature or stress changes or changes significantly, and the frequency of the Brillouin frequency domain curve shifts, so it is necessary to re-fit to obtain the Brillouin frequency domain curve. When the signal frequency shift amount of the signal strength peak does not exceed the preset threshold, it indicates that the temperature or stress does not change or does not change significantly. If the difference between the Brillouin frequency domain curve obtained based on the spliced signal segment of the current period and the Brillouin frequency domain curve of the previous period is small, it is not necessary to re-fit to obtain the Brillouin frequency domain curve in this case, and the Brillouin frequency domain curve of the previous period can be directly used, which can effectively reduce unnecessary fitting calculation of the Brillouin frequency domain curve and improve the real-time performance of fitting.

[0093] The embodiment also provides a BOTDR-based optical fiber data processing system, as shown in Figure 3 The system can include:

[0094] The signal acquisition module 11 is configured to acquire a to-be-processed time domain signal of the optical fiber by using the BOTDR.

[0095] In the embodiment, the signal acquisition module 11 can be configured to perform Figure 1The specific content of the signal acquisition module 11 can refer to the description in step S1.

[0096] The signal division module 12 is configured to divide the time-domain signal to be processed into a plurality of first signal segments in frequency ranges.

[0097] In this embodiment, the signal division module 12 can be configured to perform Figure 1 The specific content of the signal division module 12 can refer to the description in step S2.

[0098] The frequency conversion processing module 13 is configured to perform frequency down-conversion processing on each of the first signal segments to obtain a second signal segment corresponding to each of the first signal segments.

[0099] In this embodiment, the frequency conversion processing module 13 can be configured to perform Figure 1 The specific content of the frequency conversion processing module 13 can refer to the description in step S3.

[0100] The frequency domain conversion module 14 is configured to convert each of the second signal segments into a frequency domain signal segment.

[0101] In this embodiment, the frequency domain conversion module 14 can be configured to perform Figure 1 The specific content of the frequency domain conversion module 14 can refer to the description in step S4.

[0102] The signal frequency shift module 15 is configured to perform frequency shift on each of the frequency domain signal segments according to the frequency range of the first signal segment corresponding to the frequency domain signal segment.

[0103] In this embodiment, the signal frequency shift module 15 can be configured to perform Figure 1 The specific content of the signal frequency shift module 15 can refer to the description in step S5.

[0104] The signal splicing module 16 is configured to splice the frequency-shifted frequency domain signal segments to obtain a spliced frequency domain signal.

[0105] In this embodiment, the signal splicing module 16 can be configured to perform Figure 1 The specific content of the signal splicing module 16 can refer to the description in step S6.

[0106] The curve acquisition module 17 is configured to acquire a Brillouin frequency domain curve corresponding to the time-domain signal to be processed according to the spliced frequency domain signal.

[0107] In this embodiment, the curve acquisition module 17 can be configured to perform Figure 1The step S7 is shown, the specific content of the curve acquisition module 17 can refer to the description in step S7.

[0108] The embodiment also provides an electronic device, which has a structure as shown in Figure 4

[0109] The electronic device includes a memory 21, a processor 22, a communication module 23, and an input / output interface 24, and the memory 21, the processor 22, the communication module 23, and the input / output interface 24 can be connected and communicated through a bus 25.

[0110] The memory 21 is configured to store one or more computer programs and transmit codes of the computer programs to the processor 22; when the one or more computer programs are executed by the processor 22, the BOTDR-based optical fiber data processing method in the embodiment is implemented.

[0111] Optionally, the electronic device can be connected to a network through the communication module 23, so as to communicate with other devices such as terminals or servers through the network, and realize the interaction of data. The electronic device can be various forms of digital computers, such as desktop computers, servers, workstations, mainframe computers, or other types of computers. The electronic device can also be various forms of mobile terminals, such as smart phones, tablet computers, wearable devices (such as helmets, glasses, watches, etc.), and other similar mobile terminals.

[0112] Optionally, the electronic device can connect the required input / output devices such as keyboards and display devices through the input / output interface 24, and the electronic device itself can have a display device and can also be externally connected to other display devices through the input / output interface 24. Optionally, the storage device such as a hard disk can also be connected through the input / output interface 24, so that the data in the electronic device can be stored in the storage device, or the data in the storage device can be read, and the data in the storage device can also be stored in the memory 21. It can be understood that the input / output interface 24 can be a wired interface or a wireless interface. According to different actual application scenarios, the devices connected to the input / output interface 24 can be a component of the electronic device, or an external device connected to the electronic device when needed.

[0113] Optionally, the memory 21 can be a volatile memory and / or a non-volatile memory, the volatile memory can be a random access memory, and the non-volatile memory can be a read-only memory, a programmable read-only memory, an erasable programmable read-only memory, an electrically erasable programmable read-only memory, or a flash memory.

[0114] ​Optionally, the computer program stored in the processor 22 can be divided into one or more modules, which are stored in the memory 21 and executed by the processor 22 to complete the method provided by the embodiment. The one or more modules can be a series of computer program instruction segments capable of completing a specific function, which are used to describe the execution process of the computer program in the electronic device.

[0115] Optionally, the processor 22 can be various general-purpose and / or special-purpose processing components with processing and computing capabilities. Some examples of the processor 22 include, but are not limited to, a central processing unit, a graphics processing unit, a digital signal processor, various special-purpose artificial intelligence computing chips, various processors running machine learning model algorithms, and any appropriate controller, microcontroller, processor, etc. The processor 22 executes various methods and processes of the embodiment, exemplarily, a BOTDR-based optical fiber data processing method of the embodiment.

[0116] Optionally, the bus 25 can include a channel for transmitting information. According to different functions, the bus 25 can be divided into an address bus, a data bus, a control bus, etc.

[0117] In an optional implementation, the embodiment further provides a computer storage medium having a computer program stored thereon, which enables the computer to execute the method of the method embodiment when executed by the computer. Part or all of the computer program can be loaded and / or installed on the memory 21 of the electronic device. When the computer program is executed by the processor 22, one or more steps of the BOTDR-based optical fiber data processing method of the embodiment can be executed.

[0118] Optionally, the computer-readable storage medium can be a random access memory, a read-only memory, a programmable read-only memory, an erasable programmable read-only memory, an electrically erasable programmable read-only memory, etc.

[0119] Obviously, the above embodiments of the present application are only examples for clearly illustrating the technical solutions of the present application, and are not intended to limit the specific embodiments of the present application. Any modification, equivalent replacement and improvement made within the spirit and principle of the claims of the present application shall be included in the protection scope of the claims of the present application.

Claims

1. A BOTDR-based optical fiber data processing method, characterized by, The method comprises: acquiring a to-be-processed time domain signal of an optical fiber by a BOTDR; dividing the to-be-processed time domain signal into first signal segments of a plurality of frequency ranges; respectively performing down-conversion processing on each of the first signal segments to obtain a second signal segment corresponding to each of the first signal segments; respectively converting each of the second signal segments into a frequency domain signal segment; respectively performing frequency shift on each of the frequency domain signal segments according to a frequency range of the first signal segment corresponding to the frequency domain signal segment; splicing the frequency-shifted frequency domain signal segments to obtain a spliced frequency domain signal; acquiring a Brillouin frequency domain curve corresponding to the to-be-processed time domain signal according to the spliced frequency domain signal. 2.The BOTDR-based optical fiber data processing method of claim 1, wherein, The method comprises: acquiring a to-be-processed time domain signal of an optical fiber by a BOTDR; 3.The BOTDR-based optical fiber data processing method of claim 2, wherein, acquiring a to-be-processed time domain signal of an optical fiber by a BOTDR; The method comprises: comparing a frequency corresponding to a signal intensity peak in the spliced frequency domain signal of a current period with a frequency corresponding to a signal intensity peak in the spliced frequency domain signal of a previous period to obtain a signal frequency shift amount; if the signal frequency shift amount does not exceed a preset threshold, taking the Brillouin frequency domain curve of the previous period as the Brillouin frequency domain curve of the current period; 4.The BOTDR-based optical fiber data processing method of claim 1, wherein, if the signal frequency shift amount exceeds the preset threshold, fitting the spliced frequency domain signal of the current period to obtain the Brillouin frequency domain curve of the current period. The method comprises: acquiring a frequency difference between center frequencies of the frequency ranges of the first signal segments as a first offset amount between the frequency domain signal segments corresponding to the first signal segments; 5.The BOTDR-based optical fiber data processing method of claim 1, wherein, performing frequency shift on the frequency domain signal segments according to the first offset amount, so that a frequency difference between center values of frequency distributions of the frequency-shifted frequency domain signal segments is the same as a frequency difference between the center frequencies of the frequency ranges of the corresponding first signal segments. The method comprises: acquiring a second offset amount between a center frequency of the frequency range of each of the first signal segments and a frequency conversion center frequency; the frequency conversion center frequency is a center value of a frequency distribution of the frequency domain signal segment; 6.The BOTDR-based optical fiber data processing method of claim 1, wherein, performing frequency shift on the frequency domain signal segments according to the corresponding second offset amounts, so that a frequency distribution of the frequency-shifted frequency domain signal segments matches the frequency range of the corresponding first signal segment. The method comprises:

7. The BOTDR-based optical fiber data processing method according to any one of claims 1-6, wherein, determining frequency domain signal segments having coincident frequency points according to the frequency distributions of the frequency-shifted frequency domain signal segments, and splicing the frequency domain signal segments having coincident frequency points to obtain the spliced frequency domain signal. The method comprises: According to a frequency range of the first signal segment, the first signal segment is subjected to at least one down-conversion processing to obtain the second signal segment of a preset frequency.

8. A BOTDR-based optical fiber data processing system, characterized by, The system comprises: The signal acquisition module is configured to acquire a to-be-processed time-domain signal of the optical fiber by using the BOTDR. The signal division module is configured to divide the to-be-processed time-domain signal into a plurality of first signal segments of different frequency ranges. The frequency conversion processing module is configured to respectively perform down-conversion processing on each of the first signal segments to obtain a second signal segment corresponding to each of the first signal segments. The frequency domain conversion module is configured to respectively convert each of the second signal segments into a frequency domain signal segment. The signal frequency shift module is configured to respectively perform frequency shift on each of the frequency domain signal segments according to a frequency range of the first signal segment corresponding to the frequency domain signal segment. The signal splicing module is configured to splice the frequency-shifted frequency domain signal segments to obtain a spliced frequency domain signal. The curve acquisition module is configured to acquire a Brillouin frequency domain curve corresponding to the to-be-processed time-domain signal according to the spliced frequency domain signal.

9. An electronic device, comprising: The system comprises: The memory is configured to store one or more computer programs. The processor, when executing the one or more computer programs, implements the BOTDR-based optical fiber data processing method according to any one of claims 1-7.

10. A computer-readable storage medium, characterized in that, The computer readable storage medium stores computer instructions, and the computer instructions are used to make the processor execute the BOTDR-based optical fiber data processing method according to any one of claims 1-7.

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