Optical cable resource operation and maintenance management method and system

Abstract

The invention discloses an optical cable resource operation and maintenance management method and system, relates to the technical field of optical cable anomaly detection, and improves the accuracy of optical cable anomaly positioning. According to the method, the optical cable anomaly detection area is positioned, the pulse detection signal is transmitted to the optical cable anomaly detection area through the operation and maintenance detection device, the pulse reflection signal frequency spectrum is correspondingly generated according to the optical cable anomaly detection area, and the anomaly detection point location is positioned in the optical cable anomaly detection area. Generating Brillouin scattering light signals by transmitting pulse signals to each optical fiber in the anomaly detection point at a fixed point, establishing a standard operation test equation of an optical cable anomaly detection area, obtaining real-time temperature values of each optical fiber, and obtaining Brillouin scattering light frequency shift amount and optical fiber stress values according to the Brillouin scattering light signals; and substituting the real-time temperature value, the Brillouin scattering light frequency shift amount and the optical fiber stress value into a standard operation test equation, and further judging whether an abnormal optical fiber exists or not.

Description

Technical Field

[0001] The present invention relates to the technical field of optical cable anomaly detection, and in particular to an optical cable resource operation and maintenance management method and system. Background Art

[0002] With the rapid development of information technology, optical fiber communication networks have become an important part of modern communication infrastructure. Optical cables are widely distributed, covering cities, villages and various complex terrains, and their operating status is directly related to communication quality and network stability. However, during long-term operation, optical cables may be affected by environmental factors, physical damage and other factors, resulting in degradation of optical cable performance or even failure.

[0003] However, due to the wide distribution area of ​​optical cables and their small internal structure, existing optical cable operation and maintenance technologies are difficult to accurately locate optical cable anomalies in a short period of time, resulting in delays in optical cable information transmission. Therefore, an optical cable resource operation and maintenance management method and system are provided. Summary of the invention

[0004] In order to solve the above technical problems, the purpose of the present invention is to provide an optical cable resource operation and maintenance management method and system.

[0005] In order to achieve the above object, the present invention provides the following technical solutions: A method for operation and maintenance of optical cable resources comprises the following steps: Step S1, obtaining an optical cable distribution map, and then installing a number of operation and maintenance detection devices with equal spacing on the optical cables in the optical cable distribution area according to the optical cable distribution map; Step S2: setting an operation and maintenance detection cycle. When each operation and maintenance detection cycle starts, time synchronization is performed between various operation and maintenance detection devices. Step S3, splitting the optical cable distribution area into several optical cable detection areas, and then each operation and maintenance detection device obtains the optical power change curve of each optical cable detection area, selects the optical power change curve of the optical cable detection area where the signal starting point is located as the verification optical power change curve, and then compares the optical power change curves of the remaining optical cable detection areas with the verification optical power change curve, and judges whether there is an optical cable abnormality in the corresponding optical cable detection area according to the comparison result, and records the corresponding optical cable detection area as the optical cable abnormality detection area according to the judgment result; Step S4, the operation and maintenance detection device transmits a pulse detection signal to the optical cable abnormality detection area, generates a pulse reflection signal spectrum corresponding to the optical cable abnormality detection area, locates the abnormal detection point in the optical cable abnormality detection area, and then generates a Brillouin scattered light signal by transmitting a pulse signal to each optical fiber in the abnormal detection point, and establishes a standard operation inspection equation for the optical cable abnormality detection area, obtains the real-time temperature value of each optical fiber, and obtains the Brillouin scattered light frequency shift and the optical fiber stress value according to the Brillouin scattered light signal, substitutes the real-time temperature value, the Brillouin scattered light frequency shift and the optical fiber stress value into the standard operation inspection equation, and then determines whether there is an abnormal optical fiber.

[0006] Furthermore, the optical cable distribution map records the distribution status of the optical cables in the optical cable distribution area, wherein the optical cable distribution area and the optical cable distribution in the optical cable distribution map are proportionally mapped; According to the distribution status of the optical cables in the optical cable distribution map, n operation and maintenance detection devices are set for the optical cables in the optical cable distribution area, and the operation and maintenance detection devices are equipped with a clock synchronization circuit, an optical power meter, a pulse device and a temperature sensor.

[0007] Furthermore, the operation and maintenance detection cycle is divided into a time verification point, a wide-area anomaly detection period, a narrow-area anomaly location period, and a defect location period.

[0008] Furthermore, the process of performing time synchronization between the operation and maintenance detection devices includes: During the transmission of analog signals or digital signals in the optical cable distribution area, each time a time verification point is started at the beginning or end of an operation and maintenance detection cycle, each operation and maintenance detection device is synchronized with other operation and maintenance detection devices in turn through a clock synchronization circuit, and a time deviation threshold is set to determine the size relationship between the system time difference of each operation and maintenance detection device and the time deviation threshold, and a public system time is set according to the determination result, and the public system time is synchronized to the operation and maintenance detection device whose system time is not the public system time.

[0009] Furthermore, the process of obtaining the calibration optical power variation curve includes: The optical cable distribution area is divided into several optical cable detection areas, and the wide-area abnormality detection period is started after the time verification point, and then each operation and maintenance detection device calls the optical power meter along the extension direction of the optical cable to obtain the optical power change curve of the optical cable in its associated optical cable detection area; A two-dimensional coordinate system is established, and several time nodes are set in the operation and maintenance detection cycle, and the optical power change curves corresponding to the same analog signal or digital signal generated by each operation and maintenance detection device in the same operation and maintenance detection cycle are mapped to the same two-dimensional coordinate system; Select an optical power change curve collected by an operation and maintenance detection device closest to the signal starting point of the analog signal or the digital signal as a pre-verification optical power change curve; then select an optical power change curve generated by an operation and maintenance detection device second closest to the signal starting point, and compare it with the pre-verification optical power change curve; Set the deviation threshold and the verification quantity threshold. If the optical power difference between the pre-verification optical power change curve and the optical power change curve at the time nodes exceeding the verification quantity threshold is less than or equal to the deviation threshold, the pre-verification optical power change curve is recorded as the verification optical power change curve. Otherwise, the wide-area anomaly detection period enters the narrow-area anomaly positioning period.

[0010] Furthermore, the process of setting the optical cable anomaly detection area includes: For the optical power change curve collected by the operation and maintenance detection device after the operation and maintenance detection device closest to the signal starting point, if there is an optical power difference between the optical power change curve and the verification optical power change curve at time nodes that exceeds the verification quantity threshold during the wide-area anomaly detection period, and is greater than or equal to the deviation threshold, then based on the number of the corresponding optical power change curve, it is judged that the optical cable corresponding to the corresponding optical cable detection area has an abnormality, and the corresponding optical cable detection area is recorded as an optical cable abnormality detection area; otherwise, it is judged that the optical cable corresponding to the corresponding optical cable detection area has no abnormality.

[0011] Furthermore, the process of locating the abnormality detection point in the optical cable abnormality detection area includes: During the narrow-area anomaly positioning period, according to the sending direction of the analog signal or digital signal, the optical cable detection area located before the optical cable anomaly detection area and the operation and maintenance detection device associated with the optical cable anomaly detection area transmit a pulse detection signal to the optical cable along the extension direction of the optical cable through a pulse device, and then each operation and maintenance detection device collects the corresponding pulse reflection signal spectrum; Then, a plurality of equal-length inspection time segments are set, and the entire pulse reflection signal spectrum is divided into a plurality of pulse signal segments according to the inspection time segments, and each pulse signal segment in the optical cable abnormality detection area is recorded as an inspection pulse signal segment; Set a difference threshold, and compare each inspection pulse signal segment with other optical cable inspection areas in the same inspection time segment in turn, and locate the abnormal detection point in the optical cable abnormal detection area based on the comparison result.

[0012] Furthermore, the process of determining whether the optical fiber is abnormal includes: The operation and maintenance detection device emits pulse lasers at fixed points of each optical fiber within the abnormal detection point through a pulse device, and randomly emits pulse lasers to m optical fibers that are not at the abnormal detection point in the optical cable abnormal detection area, and synchronously collects real-time temperature values ​​through a temperature sensor, where m is an integer greater than 100; When the pulsed laser enters the optical fiber, it interacts with the analog signal or digital signal propagating in the optical fiber to generate Brillouin scattered light, and then the two operation and maintenance detection devices associated with the optical cable abnormality detection area simultaneously collect the Brillouin scattered light signals of the abnormal detection point and the position not being the abnormal detection point, and record them as abnormal Brillouin scattered light and calibration Brillouin scattered light signal respectively; Frequency-resolved optical gating technology is used to obtain the Brillouin scattered light frequency shift and fiber stress value of each non-abnormal detection point and the abnormal detection point according to the Brillouin scattered light signal, and establish an operation test equation between the Brillouin scattered light frequency shift, real-time temperature value and fiber stress value of the optical fiber at each position in the corresponding optical cable abnormal detection area under normal conditions; The same type of relationship parameters of the operation inspection equations at different positions are accumulated and averaged to obtain the standard relationship parameters, and then the standard operation inspection equation corresponding to the optical cable abnormality detection area is established; Select the Brillouin scattered light frequency shift of each optical fiber in the abnormal detection point and any one of the optical fiber stress value or real-time temperature value and substitute it into the standard operation test equation, and then obtain the predicted optical fiber stress value and predicted temperature value; Set the stress deviation threshold and temperature deviation threshold. If the difference between the predicted fiber stress value and the fiber stress value is greater than the stress deviation threshold, or the difference between the predicted temperature value and the real-time temperature value is greater than the temperature deviation threshold, then it is judged that the corresponding fiber has an abnormality. Otherwise, it is judged that there is no abnormality.

[0013] An optical cable resource operation and maintenance management system, comprising a data acquisition module, a time synchronization module, a regional anomaly detection module and an anomaly fixed point module; The data acquisition module is used to install a number of operation and maintenance detection devices at equal intervals on the optical cables in the optical cable distribution area according to a preset optical cable distribution map, and then obtain the optical power change curve, pulse reflection signal spectrum and Brillouin scattering light signal of each optical cable through the operation and maintenance detection device; The time synchronization module is used to set the operation and maintenance detection cycle. Whenever an operation and maintenance detection cycle begins, time synchronization is performed between various operation and maintenance detection devices. The regional anomaly detection module is used to split the optical cable distribution area into several optical cable detection areas, select the optical power change curve of the optical cable detection area where the signal starting point is located as the pre-verification optical power change curve, and then compare the optical power change curves of the remaining optical cable detection areas with the pre-verification optical power change curve, and judge whether there is an optical cable anomaly in the corresponding optical cable detection area according to the comparison result, and record the corresponding optical cable detection area as the optical cable anomaly detection area according to the judgment result; The abnormal point determination module is used to generate a pulse reflection signal spectrum according to the optical cable abnormal detection area, locate the abnormal detection point in the optical cable abnormal detection area, and establish a standard operation inspection equation for the optical cable abnormal detection area, obtain the real-time temperature value of each optical fiber and obtain the Brillouin scattered light frequency shift and the optical fiber stress value according to the Brillouin scattered light signal, substitute the real-time temperature value, the Brillouin scattered light frequency shift and the optical fiber stress value into the standard operation inspection equation, and then judge whether there is an abnormal optical fiber.

[0014] Compared with the prior art, the present invention has the following beneficial effects: The present invention divides the optical cable distribution area into several optical cable detection areas and compares and analyzes the optical power change curves of each area to achieve accurate positioning of the optical cable abnormal area. Then, by transmitting a pulse detection signal to the optical cable abnormality detection area and combining the pulse reflection signal spectrum analysis, the specific position of the optical cable abnormality can be quickly located, which shortens the time used for abnormality positioning to a certain extent and reduces the scope for subsequent positioning of the optical fiber abnormal position. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention.

[0016] Figure 1 The figure is a flow chart of the method of the present invention. DETAILED DESCRIPTION

[0017] To make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be described in detail below. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other implementation methods obtained by ordinary technicians in this field without creative work belong to the scope of protection of the present invention.

[0018] like Figure 1 As shown, a method for operation and maintenance management of optical cable resources comprises the following steps: Step S1, obtaining an optical cable distribution map, and then installing a number of operation and maintenance detection devices with equal spacing on the optical cables in the optical cable distribution area according to the optical cable distribution map; Step S2: setting an operation and maintenance detection cycle. When each operation and maintenance detection cycle starts, time synchronization is performed between various operation and maintenance detection devices. Step S3, splitting the optical cable distribution area into several optical cable detection areas, and then each operation and maintenance detection device obtains the optical power change curve of each optical cable detection area, selects the optical power change curve of the optical cable detection area where the signal starting point is located as the verification optical power change curve, and then compares the optical power change curves of the remaining optical cable detection areas with the verification optical power change curve, and judges whether there is an optical cable abnormality in the corresponding optical cable detection area according to the comparison result, and records the corresponding optical cable detection area as the optical cable abnormality detection area according to the judgment result; Step S4, the operation and maintenance detection device transmits a pulse detection signal to the optical cable abnormality detection area, generates a pulse reflection signal spectrum corresponding to the optical cable abnormality detection area, locates the abnormal detection point in the optical cable abnormality detection area, and then generates a Brillouin scattered light signal by transmitting a pulse signal to each optical fiber in the abnormal detection point, and establishes a standard operation inspection equation for the optical cable abnormality detection area, obtains the real-time temperature value of each optical fiber, and obtains the Brillouin scattered light frequency shift and the optical fiber stress value according to the Brillouin scattered light signal, substitutes the real-time temperature value, the Brillouin scattered light frequency shift and the optical fiber stress value into the standard operation inspection equation, and then determines whether there is an abnormal optical fiber.

[0019] Furthermore, step S1 is implemented by the following process: The optical cable distribution map records the distribution status of the optical cables in the optical cable distribution area, wherein the optical cable distribution area and the optical cable distribution in the optical cable distribution map are proportionally mapped; According to the distribution status of the optical cables in the optical cable distribution map, n operation and maintenance detection devices are set for the optical cables in the optical cable distribution area, wherein the operation and maintenance detection devices are equipped with a clock synchronization circuit, an optical power meter, a pulse device and a temperature sensor; The horizontal space distances between the operation and maintenance detection devices along the optical cable are equal, and according to the distribution of the optical cable, each operation and maintenance detection device is sequentially provided with a number a 1 、a 2 、a 3 ,……,a n , where n is a natural number greater than 0; At the same time, according to the distribution of the operation and maintenance detection devices in the optical cable distribution area, a corresponding number of operation and maintenance detection nodes are set on the optical cable distribution map, and each operation and maintenance detection node is marked with the number of the corresponding operation and maintenance detection device.

[0020] Further, step S2 is implemented by the following process: Set an operation and maintenance detection cycle. The duration of the operation and maintenance detection cycle is generally 10-100ms. The operation and maintenance detection cycle is divided into a time verification point, a wide-area anomaly detection period, a narrow-area anomaly location period, and a defect location period. The time verification point is located at the start and end time nodes of the operation and maintenance detection cycle. It should be noted that the wide-area anomaly detection period, the narrow-area anomaly location period and the defect location period are provided with a progressive response mechanism, that is, if an abnormality is detected in the optical cable during the wide-area anomaly detection period, the narrow-area anomaly location period is stopped and the narrow-area anomaly location period is started, and the anomaly detection area is determined and located during the start-up process of the narrow-area anomaly location period, and then the narrow-area anomaly location period is stopped and the defect location period is started; If the startup process of the wide-area abnormality detection period in the operation and maintenance detection cycle does not detect any abnormality in the optical cable, a time verification time point is performed and the next wide-area abnormality detection period is entered; The operation and maintenance detection cycle is set in each operation and maintenance detection device, and then in the process of transmitting analog signals or digital signals in the optical cable distribution area; Whenever a maintenance and inspection cycle begins or ends, a time verification time point is started, and each maintenance and inspection device is synchronized with other maintenance and inspection devices in turn through a clock synchronization circuit, and a time deviation threshold is set; If the system time difference between the two operation and maintenance detection devices is less than or equal to the time deviation threshold, the corresponding two operation and maintenance detection devices are classified as having the same system time; If the system time difference between the two operation and maintenance detection devices is greater than the time deviation threshold, no operation is performed; The number of operation and maintenance detection devices associated with each system time is counted, and the system time with the largest number of operation and maintenance detection devices is recorded as the public system time. Then, the operation and maintenance detection devices with the public system time synchronize the public system time to the operation and maintenance detection devices whose system time is not the public system time through the clock synchronization circuit.

[0021] Further, step S3 is implemented by the following process: According to the distribution of each operation and maintenance detection device, the optical cable distribution area is divided into several optical cable detection areas, and then after the time verification point of the operation and maintenance detection cycle, the wide-area abnormality detection period is started, and then each operation and maintenance detection device calls the optical power meter along the extension direction of the optical cable to obtain the optical power change curve of the optical cable in its associated optical cable detection area, and marks each optical power change curve with the number of the associated operation and maintenance detection device; Since the loss of analog or digital signals in the optical cable is almost negligible, the optical power of the analog or digital signal in the optical cable can be considered unchanged from the signal starting point to the signal receiving point. A two-dimensional coordinate system is established, and several time nodes are set in the operation and maintenance detection cycle, and the optical power change curves corresponding to the same analog signal or digital signal generated by each operation and maintenance detection device in the same operation and maintenance detection cycle are mapped to the same two-dimensional coordinate system; Select the optical power change curve collected by the operation and maintenance detection device closest to the signal starting point of the analog signal or the digital signal as the pre-verification optical power change curve, and then select the optical power change curve generated by the operation and maintenance detection device second closest to the signal starting point, and compare it with the pre-verification optical power change curve; A deviation threshold and a verification quantity threshold are set. If the optical power difference between the pre-verification optical power change curve and the optical power change curve at time nodes exceeding the verification quantity threshold is less than or equal to the deviation threshold, the pre-verification optical power change curve is recorded as the verification optical power change curve; Otherwise, it is determined that an optical cable corresponding to the optical cable detection area between the two operation and maintenance detection devices has an abnormality, and then the wide-area abnormality detection period enters the narrow-area abnormality positioning period, and the optical cable is repaired until it is determined that the pre-verification optical power change curve is recorded as the verification optical power change curve; For the optical power change curve collected by the operation and maintenance detection device after the operation and maintenance detection device closest to the signal starting point, if there is an optical power difference between the optical power change curve and the verification optical power change curve at time nodes exceeding the verification quantity threshold number within the wide-area anomaly detection period, and is greater than or equal to the deviation threshold, then according to the number of the corresponding optical power change curve, it is judged that the optical cable corresponding to the corresponding optical cable detection area has an abnormality, and the corresponding optical cable detection area is recorded as an optical cable abnormality detection area; Otherwise, it is determined that the optical cable corresponding to the corresponding optical cable detection area has no abnormality.

[0022] Further, step S4 is implemented by the following process: When it is determined that there is an optical cable anomaly in the optical cable detection area, the wide-area anomaly detection period enters the narrow-area anomaly positioning period; During the narrow-area anomaly locating period, according to the sending direction of the analog signal or the digital signal, the optical cable detection area located before the optical cable anomaly detection area and the operation and maintenance detection device associated with the optical cable anomaly detection area transmit pulse detection signals to the optical cable in both directions along the extension direction of the optical cable through the pulse device; When the pulse detection signal passes through the optical cable, local reflection occurs inside the optical cable, and then each operation and maintenance detection device collects the corresponding pulse reflection signal spectrum; The pulse reflection signal spectra collected by each operation and maintenance detection device are mapped into the same two-dimensional coordinate system. Since the optical cables in each optical cable detection area are made of the same material, the pulse reflection signal spectra generated by the optical cable detection area that is not the optical cable abnormality detection area are less different from the pulse reflection signal spectra generated by the optical cable abnormality detection area. Moreover, since the pulse detection signal is relative to the extension direction of the optical cable and propagates in a straight line inside the optical cable, the segments of the pulse reflection signal spectrum at each time point correspond to the conditions of the corresponding length of the optical cable. Then, a number of equal-length inspection time segments are set, and the length of the inspection time segment is generally between one-fiftieth and one-thirtieth of the operation and maintenance inspection cycle; According to the inspection time segment, the entire pulse reflection signal spectrum is divided into a plurality of pulse signal segments, and each pulse signal segment in the optical cable abnormality detection area is recorded as an inspection pulse signal segment; Set a difference threshold and compare each test pulse signal segment with other optical cable detection areas in the same test time segment in turn; Several time nodes are set within the inspection time segment. If there is a time node at which the difference between the value of the inspection pulse signal segment and the value of a pulse signal segment is greater than or equal to the abnormal threshold, the inspection pulse signal segment point at the corresponding time node is recorded as an abnormal detection point, and the defect location period is entered from the narrow-range abnormality location period. Otherwise, no operation is performed.

[0023] Further, according to the time when the abnormal detection point is located, two operation and maintenance detection devices associated with the optical cable abnormal detection area locate the position of the abnormal detection point in the optical cable abnormal detection area, and simultaneously mark it on the optical cable distribution map; Then, the operation and maintenance detection device emits pulse lasers to each optical fiber in the abnormal detection point through the pulse device, and randomly emits pulse lasers to m optical fibers that are not at the abnormal detection point in the optical cable abnormal detection area, and synchronously collects real-time temperature values ​​through the temperature sensor, where m is an integer greater than 100; When the pulsed laser enters the optical fiber, it interacts with the analog signal or digital signal propagating in the optical fiber to generate Brillouin scattered light, and then the two operation and maintenance detection devices associated with the optical cable abnormality detection area simultaneously collect the Brillouin scattered light signals of the abnormal detection point and the position not being the abnormal detection point, and record them as abnormal Brillouin scattered light and calibration Brillouin scattered light signal respectively; Frequency-resolved optical gating technology is used to obtain the Brillouin scattered light frequency shift and fiber stress value of each non-abnormal detection point and the abnormal detection point according to the Brillouin scattered light signal, and establish an operation verification equation between the Brillouin scattered light frequency shift, real-time temperature value and fiber stress value of the optical fiber at each position in the corresponding optical cable abnormal detection area under normal conditions, where the operation verification equation is expressed as: , where f, T and C represent the Brillouin scattered light frequency shift, real-time temperature value and fiber stress value respectively, and α and β represent relationship parameters; The same type of relationship parameters of the operation inspection equations at different positions are accumulated and averaged to obtain the standard relationship parameters, and then the standard operation inspection equation corresponding to the optical cable abnormality detection area is established; Select the Brillouin scattered light frequency shift of each optical fiber in the abnormal detection point and any one of the optical fiber stress value or real-time temperature value and substitute it into the standard operation test equation, and then obtain the predicted optical fiber stress value and predicted temperature value; Set the stress deviation threshold and temperature deviation threshold. If the difference between the predicted fiber stress value and the fiber stress value is greater than the stress deviation threshold, or the difference between the predicted temperature value and the real-time temperature value is greater than the temperature deviation threshold, then it is judged that the corresponding fiber has an abnormality. Otherwise, it is judged that there is no abnormality. According to the optical fiber anomaly detection result, the optical fiber at the corresponding position is repaired, and the defect location period ends and enters the wide area anomaly detection period. The above anomaly detection process is repeated for each optical fiber in the optical cable distribution area until the analog signal or digital signal reaches the signal receiving point.

[0024] The present invention also discloses an optical cable resource operation and maintenance management system, including a data acquisition module, a time synchronization module, a regional anomaly detection module and an anomaly fixed point module; The data acquisition module is used to install a number of operation and maintenance detection devices at equal intervals on the optical cables in the optical cable distribution area according to a preset optical cable distribution map, and then obtain the optical power change curve, pulse reflection signal spectrum and Brillouin scattering light signal of each optical cable through the operation and maintenance detection device; The time synchronization module is used to set the operation and maintenance detection cycle. Whenever an operation and maintenance detection cycle begins, time synchronization is performed between various operation and maintenance detection devices. The regional anomaly detection module is used to split the optical cable distribution area into several optical cable detection areas, select the optical power change curve of the optical cable detection area where the signal starting point is located as the pre-verification optical power change curve, and then compare the optical power change curves of the remaining optical cable detection areas with the pre-verification optical power change curve, and judge whether there is an optical cable anomaly in the corresponding optical cable detection area according to the comparison result, and record the corresponding optical cable detection area as the optical cable anomaly detection area according to the judgment result; The abnormal point determination module is used to generate a pulse reflection signal spectrum according to the optical cable abnormal detection area, locate the abnormal detection point in the optical cable abnormal detection area, and establish a standard operation inspection equation for the optical cable abnormal detection area, obtain the real-time temperature value of each optical fiber and obtain the Brillouin scattered light frequency shift and the optical fiber stress value according to the Brillouin scattered light signal, substitute the real-time temperature value, the Brillouin scattered light frequency shift and the optical fiber stress value into the standard operation inspection equation, and then judge whether there is an abnormal optical fiber.

[0025] The above embodiments are only used to illustrate the technical method of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical method of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical method of the present invention.

Claims

1. A method for operation and maintenance management of optical cable resources, characterized in that: The following steps are involved: Step S1, obtaining an optical cable distribution map, and then installing a number of operation and maintenance detection devices with equal spacing on the optical cables in the optical cable distribution area according to the optical cable distribution map; Step S2: setting an operation and maintenance detection cycle. When each operation and maintenance detection cycle starts, time synchronization is performed between various operation and maintenance detection devices. Step S3, splitting the optical cable distribution area into several optical cable detection areas, and then each operation and maintenance detection device obtains the optical power change curve of each optical cable detection area, selects the optical power change curve of the optical cable detection area where the signal starting point is located as the verification optical power change curve, and then compares the optical power change curves of the remaining optical cable detection areas with the verification optical power change curve, and judges whether there is an optical cable abnormality in the corresponding optical cable detection area according to the comparison result, and records the corresponding optical cable detection area as the optical cable abnormality detection area according to the judgment result; Step S4, the operation and maintenance detection device transmits a pulse detection signal to the optical cable abnormality detection area, generates a pulse reflection signal spectrum corresponding to the optical cable abnormality detection area, locates the abnormal detection point in the optical cable abnormality detection area, and then generates a Brillouin scattered light signal by transmitting a pulse signal to each optical fiber in the abnormal detection point, and establishes a standard operation inspection equation for the optical cable abnormality detection area, obtains the real-time temperature value of each optical fiber, and obtains the Brillouin scattered light frequency shift and the optical fiber stress value according to the Brillouin scattered light signal, substitutes the real-time temperature value, the Brillouin scattered light frequency shift and the optical fiber stress value into the standard operation inspection equation, and then determines whether there is an abnormal optical fiber.

2. The optical cable resource operation and maintenance management method according to claim 1, characterized in that: The optical cable distribution map records the distribution status of the optical cables in the optical cable distribution area, wherein the optical cable distribution area and the optical cable distribution in the optical cable distribution map are proportionally mapped; According to the distribution status of the optical cables in the optical cable distribution map, n operation and maintenance detection devices are set for the optical cables in the optical cable distribution area, and the operation and maintenance detection devices are equipped with a clock synchronization circuit, an optical power meter, a pulse device and a temperature sensor.

3. The optical cable resource operation and maintenance management method according to claim 1, characterized in that: The operation and maintenance detection cycle is divided into a time verification point, a wide-area anomaly detection period, a narrow-area anomaly location period, and a defect location period.

4. The optical cable resource operation and maintenance management method according to claim 3, characterized in that: The process of time synchronization between the operation and maintenance detection devices includes: During the transmission of analog signals or digital signals in the optical cable distribution area, each time a time verification point is started at the beginning or end of an operation and maintenance detection cycle, each operation and maintenance detection device synchronizes time with other operation and maintenance detection devices in turn through a clock synchronization circuit, and sets a time deviation threshold to determine the size relationship between the system time difference of each operation and maintenance detection device and the time deviation threshold, sets a public system time based on the determination result, and synchronizes the public system time to each operation and maintenance detection device.

5. The optical cable resource operation and maintenance management method according to claim 4, characterized in that: The process of obtaining the calibration optical power variation curve includes: The optical cable distribution area is divided into several optical cable detection areas, and the wide-area abnormality detection period is started after the time verification point, and then each operation and maintenance detection device calls the optical power meter along the extension direction of the optical cable to obtain the optical power change curve of the optical cable in its associated optical cable detection area; A two-dimensional coordinate system is established, and several time nodes are set in the operation and maintenance detection cycle, and the optical power change curves corresponding to the same analog signal or digital signal generated by each operation and maintenance detection device in the same operation and maintenance detection cycle are mapped to the same two-dimensional coordinate system; Select an optical power change curve collected by an operation and maintenance detection device closest to the signal starting point of the analog signal or the digital signal as a pre-verification optical power change curve; then select an optical power change curve generated by an operation and maintenance detection device second closest to the signal starting point, and compare it with the pre-verification optical power change curve; Set the deviation threshold and the verification quantity threshold. If the optical power difference between the pre-verification optical power change curve and the optical power change curve at the time nodes exceeding the verification quantity threshold is less than or equal to the deviation threshold, the pre-verification optical power change curve is recorded as the verification optical power change curve. Otherwise, the wide-area anomaly detection period enters the narrow-area anomaly positioning period.

6. The optical cable resource operation and maintenance management method according to claim 5, characterized in that: The process of setting the optical cable anomaly detection area includes: For the optical power change curve collected by the operation and maintenance detection device after the operation and maintenance detection device closest to the signal starting point, if there is an optical power difference between the optical power change curve and the verification optical power change curve at time nodes that exceeds the verification quantity threshold during the wide-area anomaly detection period, and is greater than or equal to the deviation threshold, then based on the number of the corresponding optical power change curve, it is judged that there is an abnormality in the optical cable corresponding to the corresponding optical cable detection area, and the corresponding optical cable detection area is recorded as an optical cable abnormality detection area, otherwise it is judged that there is no abnormality in the optical cable in the corresponding optical cable detection area.

7. The optical cable resource operation and maintenance management method according to claim 6, characterized in that: The process of locating the abnormal detection point in the optical cable abnormal detection area includes: During the narrow-area anomaly positioning period, according to the sending direction of the analog signal or digital signal, the optical cable detection area located before the optical cable anomaly detection area and the operation and maintenance detection device associated with the optical cable anomaly detection area transmit a pulse detection signal to the optical cable along the extension direction of the optical cable through a pulse device, and then each operation and maintenance detection device collects the pulse reflection signal spectrum; Setting a number of equal-length inspection time segments, dividing the entire pulse reflection signal spectrum into a number of pulse signal segments according to the inspection time segments, and recording each pulse signal segment in the optical cable abnormality detection area as an inspection pulse signal segment; Set a difference threshold, and compare each inspection pulse signal segment with other optical cable inspection areas in the same inspection time segment in turn, and locate the abnormal detection point in the optical cable abnormal detection area based on the comparison result.

8. The optical cable resource operation and maintenance management method according to claim 7, characterized in that: The process of determining whether there is an abnormality in the optical fiber includes: The operation and maintenance detection device emits pulse lasers at fixed points of each optical fiber within the abnormal detection point through a pulse device, and randomly emits pulse lasers to m optical fibers that are not at the abnormal detection point in the optical cable abnormal detection area, and synchronously collects real-time temperature values ​​through a temperature sensor, where m is an integer greater than 100; Two operation and maintenance detection devices associated with the optical cable abnormality detection area simultaneously collect Brillouin scattered light signals at the abnormal detection point and the position not being the abnormal detection point, and record them as abnormal Brillouin scattered light and calibration Brillouin scattered light signals respectively; Frequency-resolved optical gating technology is used to obtain the Brillouin scattered light frequency shift and fiber stress value of each non-abnormal detection point and the abnormal detection point according to the Brillouin scattered light signal, and a standard operation test equation corresponding to the abnormal detection area of ​​the optical cable is established. The Brillouin scattered light frequency shift and fiber stress value or real-time temperature value of each optical fiber in the abnormal detection point are selected and substituted into the standard operation test equation to obtain the predicted fiber stress value and predicted temperature value; Set the stress deviation threshold and temperature deviation threshold. If the difference between the predicted fiber stress value and the fiber stress value is greater than the stress deviation threshold, or the difference between the predicted temperature value and the real-time temperature value is greater than the temperature deviation threshold, then it is judged that the corresponding fiber has an abnormality. Otherwise, it is judged that there is no abnormality.

9. An optical cable resource operation and maintenance management system, used to implement an optical cable resource operation and maintenance management method according to any one of claims 1 to 8, characterized in that: It includes data acquisition module, time synchronization module, regional anomaly detection module and anomaly fixed point module; The data acquisition module is used to install a plurality of operation and maintenance detection devices in the optical cable distribution area according to a preset optical cable distribution map, and obtain the optical power change curve, pulse reflection signal spectrum and Brillouin scattering light signal of each optical cable through the operation and maintenance detection device; The time synchronization module is used to set the operation and maintenance detection cycle. Whenever an operation and maintenance detection cycle begins, time synchronization is performed between various operation and maintenance detection devices. The regional anomaly detection module is used to split the optical cable distribution area into several optical cable detection areas, select the optical power change curve of the optical cable detection area where the signal starting point is located as the pre-verification optical power change curve, and then compare the optical power change curves of the remaining optical cable detection areas with the pre-verification optical power change curve, and judge whether there is an optical cable anomaly in the corresponding optical cable detection area according to the comparison result, and record the corresponding optical cable detection area as the optical cable anomaly detection area according to the judgment result; The abnormal point determination module is used to generate a pulse reflection signal spectrum according to the optical cable abnormal detection area, locate the abnormal detection point in the optical cable abnormal detection area, and establish a standard operation inspection equation for the optical cable abnormal detection area, obtain the real-time temperature value of each optical fiber and obtain the Brillouin scattered light frequency shift and the optical fiber stress value according to the Brillouin scattered light signal, substitute the real-time temperature value, the Brillouin scattered light frequency shift and the optical fiber stress value into the standard operation inspection equation, and then judge whether there is an abnormal optical fiber.

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