Fault detection and judgment method for communication optical cable line

Abstract

The invention discloses a fault detection and judgment method for a communication optical cable line. The method comprises the following steps: establishing a distribution distance of a communication optical cable, a plurality of fixed-point detections on the communication optical cable and a three-dimensional data storage graph among data acquisition objects of each fixed-point detection; establishing a deep learning machine model by taking historical data in the three-dimensional data storage graph as a training sample, determining a fault distribution section of the communication optical cable according to a comparison result of a predicted value and an actual monitoring value of each fixed-point detection position by using the deep learning machine model, and preliminarily screening the fault distribution section with a fault; performing inspection on the fault distribution section to determine a fault occurrence point, performing data acquisition on the fault distribution section by adopting a half-and-half exclusion method to reduce the inspection range, and performing inspection on the fault occurrence point by adopting a data acquisition mode of the half-and-half exclusion method on the acquisition length of the inspection detection assembly; the fault can be predicted, and the coverage area of the fault occurrence point is specifically reduced so as to accurately confirm the position of the fault occurrence point.

Description

Technical Field

[0001] The present invention relates to the technical field of communication optical cable maintenance, and in particular to a method for detecting and judging faults of a communication optical cable line. Background Art

[0002] Optical cable failures can be roughly divided into the following categories: 1. Fiber breakage and physical damage to the optical fiber, which usually occurs at the optical fiber connector or bending part; 2. Micro-bend damage to the optical fiber: The optical cable is slightly bent due to the tight cable wiring, which will cause signal attenuation after long-term use and affect the transmission speed of the optical cable; 3. Failure of optical properties: The optical cable is folded, flattened, twisted, etc., which will cause the optical properties of the optical cable to fail, and then lead to increased coupling loss between cable cores; 4. Pollution and damage: The surface of the optical fiber is contaminated by the coating, external force damage, etc., which can also cause optical cable failure.

[0003] The unified reflection parameter of the above-mentioned faults is the attenuation of the communication signal. Most of the existing communication optical cable fault work works in the following way: when the communication optical cable fails during operation, the total length of the change in the communication parameters of the communication optical cable is used as the inspection target, so that the communication optical cable is inspected for safety in turn, and the inspection length that takes the total length of the change in the communication parameters as the inspection target is large and the inspection time is long. Summary of the invention

[0004] The purpose of the present invention is to provide a method for fault detection and judgment of a communication optical cable line to solve the technical problems in the prior art that the total length of communication parameter changes as the inspection target is large and the inspection time is long.

[0005] In order to solve the above technical problems, the present invention specifically provides the following technical solutions:

[0006] A method for detecting and judging a fault of a communication optical cable line comprises the following steps:

[0007] A method for detecting and judging a fault of a communication optical cable line comprises the following steps:

[0008] Step 100: according to the distribution of the communication optical cable communication route in the designated area, a plurality of fixed detection points are set on the communication optical cable communication route, and a topological relationship diagram representing the distribution position and association relationship of the fixed detection points on the communication optical cable communication route in the designated area is constructed;

[0009] Step 200: Calculate the communication signal attenuation value of each fixed-point detection point using the historical detection data of each fixed-point detection point as a statistical sample, determine the linkage parent-child relationship between the communication signal attenuation values ​​based on the distribution position of each fixed-point detection point on the topological relationship diagram, and use the linkage parent-child relationship to infer the fault distribution segment containing the fault occurrence point;

[0010] Step 300: Perform fault detection on the fault distribution section each time according to the compromised single-side measurement method, and use the half-elimination method to perform elimination detection on the fault distribution section to narrow the inspection range until the fault occurrence point is inspected.

[0011] As a preferred solution of the present invention, in step 100, a plurality of branch nodes are set on the communication route of the communication optical cable, and the topological relationship between all branch nodes is determined along the communication direction of the communication optical cable, wherein the branch node on the main communication line of the communication optical cable is used as the parent node, and the fixed point detection point on the main communication line of the communication optical cable is used as the parent detection point, the branch node on the branch communication line of the communication optical cable is used as the child node, and the fixed point detection point on the branch communication line of the communication optical cable is used as the child detection point;

[0012] The fixed-point detection point is set on the communication route of the communication optical cable, and the detection data of the fixed-point detection point is associated due to the topological relationship between all branch nodes.

[0013] As a preferred solution of the present invention, in step 200, the communication signal attenuation value of each fixed-point detection point is calculated using the historical detection data of each fixed-point detection point as a statistical sample in the following manner:

[0014] Real-time statistics of the detection data of each of the fixed detection points are collected to form historical detection data of each of the fixed detection points;

[0015] Taking the detection data of each fixed detection point at the current time point as the active comparison value, and taking the detection data corresponding to the last detection time point in the historical detection data of the fixed detection point as the passive comparison value;

[0016] The difference between the active comparison value and the passive comparison value is taken as the communication signal attenuation value. When the communication signal attenuation value within a unit time range exceeds the set threshold, it is considered that there is a fault in the communication optical cable monitored by the fixed detection point.

[0017] As a preferred solution of the present invention, the implementation method of using the linkage parent-child relationship to derive the fault distribution segment containing the fault occurrence point is:

[0018] Determine the position of the fixed-point detection point where the communication signal attenuation value within the unit time range exceeds the set threshold value in the topological relationship diagram, and determine the linkage parent-child relationship between all the fixed-point detection points according to the topological relationship;

[0019] The communication signal attenuation values ​​of all fixed-point detection points are counted, and the positions of the fixed-point detection points corresponding to the signal attenuation formed by the linkage are screened out based on the linkage parent-child relationship between all fixed-point detection points, and the real fault distribution section is determined based on the size of the communication signal attenuation value;

[0020] The line where the communication signal attenuation value exceeds the fixed-point detection point of the linkage parent-child relationship is located is regarded as an independent fault distribution section;

[0021] When the communication signal attenuation value of the sub-detection point matches the communication signal attenuation value of the parent detection point, the communication optical cable communication route corresponding to the parent detection point is taken as the real fault distribution section, and the communication optical cable communication route corresponding to the sub-detection point is taken as the false fault distribution section;

[0022] When the communication signal attenuation value of the sub-detection point does not correspond to the communication signal attenuation value of the parent detection point, the communication route of the communication optical cable detected by the sub-detection point is taken as an independent fault distribution section.

[0023] As a preferred solution of the present invention, in step 300, the optical fiber reflection test principle is specifically used in this embodiment to complete the fault occurrence point detection, and the implementation steps are:

[0024] Obtaining optical signal attenuation values ​​of all fixed-point detection positions on the optical cable communication line, and determining the optical cable branch where the fault occurs based on the optical signal attenuation values, wherein the optical cable branch where the optical signal attenuation value is greater than a set attenuation threshold is set as a fault inspection section;

[0025] For the fault inspection section, the inspection span range of the inspection detection component is inspected by half to eliminate the method to detect the fault section, and the fault occurrence point is determined from a small range.

[0026] As a preferred solution of the present invention, in step 300, the specific implementation method of collecting data on the fault distribution section by using a compromise fault judgment method is:

[0027] First, the distribution distance of the fault distribution section is divided according to the center position, one section is a fault inspection section, and the other section is a waiting fault inspection section;

[0028] First, the fault inspection section is judged by using the inspection and detection component. If it is judged that the fault inspection section is faulty, the fault inspection section waiting for fault is temporarily not detected. The fault inspection section is further divided according to the center position, and the above steps are repeated until the fault occurrence point is determined;

[0029] If the fault inspection section does not fail, the distribution distance of the waiting fault inspection section is further divided according to the center position, one section is the actual fault inspection section, and the other section is the waiting fault inspection section. Repeat the above steps until the fault occurrence point is determined.

[0030] As a preferred solution of the present invention, the inspection and detection component includes an inspection optical fiber reflection end and a signal receiving test end;

[0031] The inspection optical fiber reflection end is used to transmit a beam of optical fiber signal to the starting point of the fault inspection section, and the signal receiving test end is always in the middle position of the fault inspection section to receive the reflection signal transmitted by the fault inspection section;

[0032] Fault judgment is performed based on the attenuation of the reflected signal received by the signal receiving test end.

[0033] As a preferred solution of the present invention, when the attenuation of the reflected signal received by the signal receiving test end is greater than a set threshold, it is determined that the fault inspection section has a fault;

[0034] When the attenuation of the reflected signal received by the signal receiving test end is less than a set threshold, it is determined that no fault occurs in the fault inspection section.

[0035] As a preferred solution of the present invention, in step 300, for each fault inspection segment, a half-elimination method of the inspection span range of the inspection detection component is used to perform fault detection on the fault occurrence segment, and the specific implementation method for determining the fault occurrence point is as follows:

[0036] Step 301: When the fault inspection section is subjected to fault judgment using the inspection and detection component, the signal attenuation monitored by the inspection and detection component is greater than a set threshold;

[0037] Step 302: Taking the starting end of the fault inspection section as the optical fiber launch point and the middle position of the fault inspection section as the signal receiving test end, determining whether the signal receiving test end has signal attenuation;

[0038] Step 303: If the signal receiving test end does not experience signal attenuation, continue to move the inspection optical fiber reflection end to the middle position of the current fault inspection section, take the starting end of the fault inspection section as the optical fiber launch point, and take the middle position of the remaining other half of the fault inspection section as the signal receiving test end to determine whether the signal receiving test end experiences signal attenuation;

[0039] If signal attenuation has not occurred, repeat the current step 303 until the signal receiving test end measures signal attenuation, and it is considered that there is a fault between the inspection optical fiber reflection end and the signal receiving test end at this time;

[0040] If signal attenuation occurs, proceed to step 304;

[0041] Step 304: If signal attenuation occurs at the signal receiving test end, the optical fiber transmitting point position is kept unchanged, and the signal receiving test end is moved to the middle position of the currently detected fault inspection section to determine whether signal attenuation occurs at the signal receiving test end.

[0042] As a preferred solution of the present invention, if signal attenuation does not occur, step 303 is repeated until the distance between the current inspection optical fiber reflection end and the signal receiving test end is less than the set value, and the waiting fault inspection section with the same length as the fault inspection section is considered to be the fault occurrence point;

[0043] If signal attenuation occurs, step 304 is repeated until the distance between the current inspection optical fiber reflection end and the signal receiving test end is less than the set value, and the fault inspection section is considered to be the fault occurrence point.

[0044] Compared with the prior art, the present invention has the following beneficial effects:

[0045] The present invention first collects autonomous data of the communication optical cable to form historical data, and predicts the distribution threshold of the monitoring data of each fixed-point detection position in the communication transmission path of the communication optical cable by analyzing the historical data. When the actual monitoring value of each fixed-point detection position is not at the distribution threshold, it is considered that a fault occurs at the fixed-point detection position, and the fault distribution section is predicted based on the parent-child relationship of the communication transmission path of the communication optical cable and the specific data of the actual monitoring value. In order to further shorten the length of the fault judgment inspection and reduce the screening time, the fault distribution section is compromised and divided into two sections for detection to determine the communication transmission side where the fault occurs, and then the span of the collection end of the safety inspection is compromised. There is no need to detect the entire fault inspection section in sequence according to the communication path and distance, thereby specifically reducing the coverage area of ​​the fault occurrence point and being able to accurately confirm the location of the fault occurrence point. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] In order to more clearly illustrate the implementation methods of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for the implementation methods or the description of the prior art. Obviously, the drawings in the following description are only exemplary, and for ordinary technicians in this field, other implementation drawings can be derived from the provided drawings without creative work.

[0047] Figure 1 A schematic diagram of a flow chart of a fault detection and judgment method provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0048] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0049] like Figure 1 As shown, the present invention provides a method for detecting and judging a fault of a communication optical cable line, comprising the following steps:

[0050] Step 100: Based on the distribution of the communication optical cable communication routes in the specified area, a plurality of fixed detection points are set on the communication optical cable communication routes, and a topological relationship diagram representing the distribution positions and association relationships of the fixed detection points on the communication optical cable communication routes in the specified area is constructed.

[0051] In step 100, a plurality of branch nodes are set on the communication route of the communication optical cable, and the topological relationship between all branch nodes is determined along the communication direction of the communication optical cable, wherein the branch node on the main communication line of the communication optical cable is used as the parent node, and the fixed-point detection point on the main communication line of the communication optical cable is used as the parent detection point, the branch node on the branch communication line of the communication optical cable is used as the child node, and the fixed-point detection point on the branch communication line of the communication optical cable is used as the child detection point.

[0052] The fixed-point detection point is set on the communication route of the communication optical cable. The detection data of the fixed-point detection point are associated due to the topological relationship between all branch nodes.

[0053] It should be noted that the fiber-to-the-home (FTTH) optical cable line is generally divided into four sections from the office to the user: the trunk section, the distribution section, the introduction section and the home section. Therefore, the communication optical cable line is divided into the main communication line and the branch communication line distributed to the home.

[0054] Therefore, the fixed detection point set on the main communication line is used as the parent detection point, and the fixed detection point set on the branch communication line is used as the child detection point. When there is a fault on the main communication line, the corresponding branch communication line with a topological relationship will be affected by the fault on the main communication line, which is manifested in that the child detection point will also obtain the communication signal attenuation value. When there is a fault on the branch communication line, the main communication line can maintain a stable working state.

[0055] Therefore, after constructing the topology relationship diagram, this embodiment determines whether the main communication line or the branch communication line has a fault according to the location of the fixed-point detection point where the communication signal attenuation occurs.

[0056] Step 200, using the historical detection data of each fixed-point detection point as a statistical sample to calculate the communication signal attenuation value of each fixed-point detection point, determining the linkage parent-child relationship between the communication signal attenuation values ​​based on the distribution position of each fixed-point detection point on the topological relationship diagram, and using the linkage parent-child relationship to infer the fault distribution segment containing the fault occurrence point.

[0057] In step 200, the communication signal attenuation value of each fixed-point detection point is calculated by using the historical detection data of each fixed-point detection point as a statistical sample as follows:

[0058] Real-time statistics of the detection data of each fixed detection point to form the historical detection data of each fixed detection point;

[0059] The detection data of each fixed detection point at the current time point is used as the active comparison value, and the detection data corresponding to the last detection time point in the historical detection data of the fixed detection point is used as the passive comparison value;

[0060] The difference between the active comparison value and the passive comparison value is taken as the communication signal attenuation value. When the communication signal attenuation value within a unit time range is greater than the set threshold, it is considered that there is a fault in the communication optical cable monitored by the fixed detection point.

[0061] Each fixed detection point is detected at fixed time intervals. Even when the optical cable is transmitting communication, signal attenuation may occur. Therefore, in order to accurately determine the signal attenuation at each fixed detection point, this embodiment compares the current detection value of each fixed detection point with the previous detection value of the fixed detection point itself to calculate the communication signal attenuation of the fixed detection point.

[0062] When the communication signal attenuation value of a certain fixed detection point within a unit time range is greater than the set threshold, it is considered that the communication optical cable monitored by the fixed detection point has a fault. All fixed detection points where the communication signal attenuation value is detected to be greater than the set threshold are integrated into the topology relationship diagram, and the fault distribution section is further determined based on the main communication lines and branch communication lines distributed by the fixed detection points.

[0063] The implementation method of using the linkage parent-child relationship to derive the fault distribution segment containing the fault occurrence point is as follows:

[0064] Determine the position of the fixed-point detection point in the topology diagram where the communication signal attenuation value within the unit time range exceeds the set threshold, and determine the linkage parent-child relationship between all fixed-point detection points based on the topological relationship;

[0065] The communication signal attenuation values ​​of all fixed-point detection points are counted, and the positions of the fixed-point detection points corresponding to the signal attenuation formed by the linkage are screened out based on the linkage parent-child relationship between all fixed-point detection points, and the real fault distribution section is determined based on the size of the communication signal attenuation value;

[0066] The line where the communication signal attenuation value exceeds the fixed-point detection point of the linkage parent-child relationship is located is regarded as an independent fault distribution section;

[0067] When the communication signal attenuation value of the sub-detection point matches the communication signal attenuation value of the parent detection point, the communication optical cable communication route corresponding to the parent detection point is taken as the real fault distribution section, and the communication optical cable communication route corresponding to the sub-detection point is taken as the false fault distribution section;

[0068] When the communication signal attenuation value of the sub-detection point does not correspond to the communication signal attenuation value of the parent detection point, the communication route of the communication optical cable detected by the sub-detection point is taken as an independent fault distribution section.

[0069] If all the fixed detection points with communication signal attenuation values ​​greater than the set threshold are detected and are only set on the branch communication line, that is, all the current fixed detection points are sub-detection points, then the fault distribution segment containing the fault occurrence point is inferred based on the upstream and downstream communication relationship of the branch communication line.

[0070] If all the fixed detection points whose communication signal attenuation values ​​are detected to be greater than the set threshold are distributed on the main communication line and the branch communication line at the same time, that is, all the current fixed detection points have parent detection points and child detection points, then the fault distribution segment containing the fault occurrence point is further inferred based on the matching relationship between the communication signal attenuation values ​​of the parent detection points and the child detection points.

[0071] That is, when the communication signal attenuation values ​​of the parent detection point and the child detection point have a matching isolinear relationship, that is, the communication signal attenuation value of the child detection point has a fixed linear multiple relationship with the communication signal attenuation value of the parent detection point, it is considered that the fault distribution segment containing the fault occurrence point occurs on the main communication line, and the detection segment based on the parent detection point at the most upstream on the main communication line is used as the real fault distribution segment containing the fault occurrence point, while other branch communication lines with a parent-child linkage relationship only have corresponding signal attenuation due to the fault of the main communication line. At this time, the branch communication line is considered to be a false fault distribution segment, and no further confirmation of the fault occurrence point is performed.

[0072] When the communication signal attenuation value of the sub-detection point exceeds the fixed linear multiple relationship with the communication signal attenuation value of the parent detection point, it is considered that the branch communication line corresponding to the sub-detection point also has a separate fault distribution segment. Based on the distribution position of the sub-detection points of the branch communication line that exceed the fixed linear multiple relationship, the detection section of the sub-detection point at the uppermost upstream is used as the fault distribution segment containing the fault occurrence point.

[0073] Since the detection distance of the fixed detection points on the branch communication line and the main communication line is very long, the distance of the fault distribution section including the fault occurrence point is very long. If the fault distribution section is detected in sequence, the fault troubleshooting time will be very long.

[0074] Therefore, this embodiment reduces the length of the investigation and shortens the investigation time through step 300.

[0075] Step 300: Perform fault detection on the fault distribution section each time according to the compromised single-side measurement method, and use the half-elimination method to perform elimination detection on the fault distribution section to narrow the inspection range until the fault occurrence point is inspected.

[0076] In step 300, the optical fiber reflection test principle is specifically used in this embodiment to complete the fault point detection, and the implementation steps are as follows:

[0077] Obtaining optical signal attenuation values ​​of all fixed-point detection positions on the optical cable communication line, and determining the optical cable branch where the fault occurs based on the optical signal attenuation values, wherein the optical cable branch where the optical signal attenuation value is greater than a set attenuation threshold is set as a fault inspection section;

[0078] For the fault inspection section, the inspection span range of the inspection detection component is inspected by half to eliminate the method to detect the fault section, and the fault occurrence point is determined from a small range.

[0079] The inspection and detection component includes an inspection optical fiber reflection end and a signal receiving test end; wherein, the inspection optical fiber reflection end is used to transmit a beam of optical fiber signal to the starting point of the fault inspection section, and the signal receiving test end is always in the middle position of the fault inspection section, and is used to receive the reflected signal emitted by the fault inspection section; the fault judgment is performed according to the attenuation of the reflected signal received by the signal receiving test end.

[0080] Assuming that there is optical signal attenuation in the fault inspection section, the principle of optical fiber reflection test is that the test instrument transmits a beam of optical fiber signal. When the signal reaches the test point, it will transmit a reflection signal to the tested fiber core, and then determine the location and type of the optical cable fault by detecting the intensity and time of the reflection signal.

[0081] When the attenuation of the reflected signal received by the signal receiving test end is greater than the set threshold, it is determined that the fault inspection section has a fault;

[0082] When the attenuation of the reflected signal received by the signal receiving test end is less than the set threshold, it is determined that no fault occurs in the fault inspection section.

[0083] The specific implementation method of collecting data for the fault distribution section through a compromise fault judgment method is as follows:

[0084] First, the distribution distance of the fault distribution section is divided according to the center position, one section is the fault inspection section, and the other section is the waiting fault inspection section;

[0085] First, the fault inspection section is judged by using the inspection and detection component. If it is judged that the fault inspection section is faulty, the fault inspection section waiting for fault is temporarily not detected. The fault inspection section is further divided according to the center position, and the above steps are repeated until the fault occurrence point is determined;

[0086] If the fault inspection section does not fail, the distribution distance of the waiting fault inspection section will be further divided according to the center position, one section is the actual fault inspection section, and the other section is the waiting fault inspection section. Repeat the above steps until the fault occurrence point is determined.

[0087] For the communication transmission line side, the fault distribution segment is detected by using the binary elimination method. The specific implementation of determining the fault occurrence segment from a large range can be summarized as follows:

[0088] Based on the communication transmission lines covered by the fault distribution section, the fault distribution section is divided into two sides to be collected in a half-compromise manner.

[0089] Select one object from the two sides to be collected as the fault inspection section, use the inspection detection component to move along the fault inspection section and perform detection based on the fiber optic reflection test principle, and determine whether this side is the fault section containing the fault point based on the detection results. Repeat the experiment many times until the distance of the detected communication transmission line is less than the set value, and it is considered that the current fault section can more conveniently and directly find the fault point.

[0090] The specific implementation steps of using the optical fiber reflection test principle to complete the fault point detection in this implementation are as follows:

[0091] Obtaining optical signal attenuation values ​​obtained at all fixed-point detection positions on the optical cable communication line, and determining the optical cable branch where the fault occurs based on the optical signal attenuation values, wherein the optical cable branch where the optical signal attenuation value is greater than a set attenuation threshold is set as a fault inspection section;

[0092] For the fault inspection section, the inspection span range of the inspection detection component is inspected by half to eliminate the method to detect the fault section, and the fault occurrence point is determined from a small range.

[0093] For the fault inspection section, the inspection span range of the inspection detection component is checked by half elimination method to detect the fault section. The specific implementation method of determining the fault occurrence point from a small range is as follows:

[0094] Step (1) When a fault occurs in the fault inspection section, the reflective end of the inspection optical fiber is moved to the starting end of the fault inspection section.

[0095] Step (2) takes the starting end of the fault inspection section as the optical fiber launch point and the middle position of the fault inspection section as the signal receiving test end to determine whether signal attenuation occurs at the signal receiving test end.

[0096] Step (3) If the signal receiving test end does not experience signal attenuation, continue to move the inspection optical fiber reflection end to the middle position of the current fault inspection section, use the starting end of the fault inspection section as the optical fiber launch point, and use the middle position of the remaining other half of the fault inspection section as the signal receiving test end to determine whether the signal receiving test end experiences signal attenuation;

[0097] In step (4), if signal attenuation has not occurred, step (3) is repeated until the signal receiving test end measures signal attenuation. It is considered that there is a fault between the inspection optical fiber reflector end and the signal receiving test end. At this time, according to the current distance between the inspection optical fiber reflector end and the signal receiving test end, if the distance is very small, the fault occurrence end is directly used as the location of the fault occurrence point.

[0098] Step (5) If the distance is very large, and the signal receiving test end has signal attenuation, then the position of the optical fiber launch point is kept unchanged, and the signal receiving test end is moved to the middle position of the fault inspection section currently being detected to determine whether the signal receiving test end has signal attenuation. If no signal attenuation occurs, repeat steps (3) to (4) until signal attenuation occurs, and then proceed to step (6);

[0099] (6) If signal attenuation occurs, repeat step (5) until the signal receiving test end can measure the optical reflection signal. In this case, the other half of the currently detected fault inspection section has a fault occurrence section. Generally, if the length of the fault occurrence section is small enough, the fault occurrence section is considered to be the fault occurrence point.

[0100] It should be noted that in the case of physical damage to the optical fiber, the phenomenon displayed is that the light reflection signal cannot be directly detected, and the signal attenuation is extremely large. For optical fiber micro-bend damage, optical property failure, pollution and damage, the light reflection signal can be detected, and the signal attenuation is relatively small compared to the case of physical damage to the optical fiber.

[0101] It should be further explained that, in this embodiment, the fault detection of the optical cable communication line is performed by default when there is a fault at one point in the optical cable communication line, which is more in line with the actual situation. Generally, the optical cable rarely has multiple fault problems at the same time, such as breakage or extrusion deformation.

[0102] This implementation method first collects autonomous data of the communication optical cable to form historical data, and predicts the distribution threshold of the monitoring data of each fixed-point detection position in the communication transmission path of the communication optical cable through analysis of the historical data. When the actual monitoring value of each fixed-point detection position is not within the distribution threshold, it is considered that a fault has occurred at the fixed-point detection position, and the fault distribution segment is predicted based on the parent-child relationship of the communication transmission path of the communication optical cable and the specific data of the actual monitoring value. In order to further shorten the length of the fault judgment inspection and reduce the screening time, the fault distribution segment is divided into two sections for detection to determine the communication transmission side where the fault occurs, and then the span of the collection end of the safety inspection is compromised. There is no need to detect the entire fault inspection section in sequence according to the communication path and distance, thereby specifically reducing the coverage area of ​​the fault occurrence point and being able to accurately confirm the location of the fault occurrence point.

[0103] The above embodiments are only exemplary embodiments of the present application and are not intended to limit the present application. The protection scope of the present application is defined by the claims. Those skilled in the art may make various modifications or equivalent substitutions to the present application within the essence and protection scope of the present application, and such modifications or equivalent substitutions shall also be deemed to fall within the protection scope of the present application.

Claims

1. A method for detecting and judging faults in a communication optical cable line, characterized in that: The following steps are involved: Step 100: according to the distribution of the communication optical cable communication route in the designated area, a plurality of fixed detection points are set on the communication optical cable communication route, and a topological relationship diagram representing the distribution position and association relationship of the fixed detection points on the communication optical cable communication route in the designated area is constructed; Step 200: Calculate the communication signal attenuation value of each fixed-point detection point using the historical detection data of each fixed-point detection point as a statistical sample, determine the linkage parent-child relationship between the communication signal attenuation values ​​based on the distribution position of each fixed-point detection point on the topological relationship diagram, and use the linkage parent-child relationship to infer the fault distribution segment containing the fault occurrence point; Step 300: Perform fault detection on the fault distribution section each time according to the compromised single-side measurement method, and use the half-elimination method to perform elimination detection on the fault distribution section to narrow the inspection range until the fault occurrence point is inspected.

2. A method for detecting and judging faults in a communication optical cable line according to claim 1, characterized in that: In step 100, a plurality of branch nodes are set on the communication route of the communication optical cable, and the topological relationship between all branch nodes is determined along the communication direction of the communication optical cable, wherein the branch node on the main communication line of the communication optical cable is used as the parent node, and the fixed point detection point on the main communication line of the communication optical cable is used as the parent detection point, the branch node on the branch communication line of the communication optical cable is used as the child node, and the fixed point detection point on the branch communication line of the communication optical cable is used as the child detection point; The fixed-point detection point is set on the communication route of the communication optical cable, and the detection data of the fixed-point detection point is associated due to the topological relationship between all branch nodes.

3. A method for detecting and judging faults in a communication optical cable line according to claim 2, characterized in that: In step 200, the communication signal attenuation value of each fixed-point detection point is calculated by using the historical detection data of each fixed-point detection point as a statistical sample as follows: Real-time statistics of the detection data of each of the fixed detection points are collected to form historical detection data of each of the fixed detection points; Taking the detection data of each fixed detection point at the current time point as the active comparison value, and taking the detection data corresponding to the last detection time point in the historical detection data of the fixed detection point as the passive comparison value; The difference between the active comparison value and the passive comparison value is taken as the communication signal attenuation value. When the communication signal attenuation value within a unit time range exceeds the set threshold, it is considered that there is a fault in the communication optical cable monitored by the fixed detection point.

4. A method for detecting and judging faults in a communication optical cable line according to claim 3, characterized in that: The implementation method of using the linkage parent-child relationship to derive the fault distribution segment containing the fault occurrence point is as follows: Determine the position of the fixed-point detection point where the communication signal attenuation value within the unit time range exceeds the set threshold value in the topological relationship diagram, and determine the linkage parent-child relationship between all the fixed-point detection points according to the topological relationship; The communication signal attenuation values ​​of all fixed-point detection points are counted, and the positions of the fixed-point detection points corresponding to the signal attenuation formed by the linkage are screened out based on the linkage parent-child relationship between all fixed-point detection points, and the real fault distribution section is determined based on the size of the communication signal attenuation value; The line where the communication signal attenuation value exceeds the fixed-point detection point of the linkage parent-child relationship is located is regarded as an independent fault distribution section; When the communication signal attenuation value of the sub-detection point matches the communication signal attenuation value of the parent detection point, the communication optical cable communication route corresponding to the parent detection point is taken as the real fault distribution section, and the communication optical cable communication route corresponding to the sub-detection point is taken as the false fault distribution section; When the communication signal attenuation value of the sub-detection point does not correspond to the communication signal attenuation value of the parent detection point, the communication route of the communication optical cable detected by the sub-detection point is taken as an independent fault distribution section.

5. A method for detecting and judging faults in a communication optical cable line according to claim 4, characterized in that: In step 300, the optical fiber reflection test principle is specifically used in this embodiment to complete the fault point detection, and the implementation steps are as follows: Obtaining optical signal attenuation values ​​of all fixed-point detection positions on the optical cable communication line, and determining the optical cable branch where the fault occurs based on the optical signal attenuation values, wherein the optical cable branch where the optical signal attenuation value is greater than a set attenuation threshold is set as a fault inspection section; For the fault inspection section, the inspection span range of the inspection detection component is inspected by half to eliminate the method to detect the fault section, and the fault occurrence point is determined from a small range.

6. A method for detecting and judging faults in a communication optical cable line according to claim 5, characterized in that: In step 300, the specific implementation method of collecting data on the fault distribution section by using a compromise fault judgment method is as follows: First, the distribution distance of the fault distribution section is divided according to the center position, one section is a fault inspection section, and the other section is a waiting fault inspection section; First, the fault inspection section is judged by using the inspection and detection component. If it is judged that the fault inspection section is faulty, the fault inspection section waiting for fault is temporarily not detected, and the fault inspection section is further divided according to the center position, and the above steps are repeated until the fault occurrence point is determined; If the fault inspection section does not fail, the distribution distance of the waiting fault inspection section is further divided according to the center position, one section is the actual fault inspection section, and the other section is the waiting fault inspection section. Repeat the above steps until the fault occurrence point is determined.

7. A method for detecting and judging faults in a communication optical cable line according to claim 5, characterized in that: The inspection and detection component includes an inspection optical fiber reflection end and a signal receiving test end; The inspection optical fiber reflection end is used to transmit a beam of optical fiber signal to the starting point of the fault inspection section, and the signal receiving test end is always in the middle position of the fault inspection section to receive the reflection signal transmitted by the fault inspection section; Fault judgment is performed based on the attenuation of the reflected signal received by the signal receiving test end.

8. A method for detecting and judging faults in a communication optical cable line according to claim 7, characterized in that: When the attenuation of the reflected signal received by the signal receiving test end is greater than a set threshold, it is determined that the fault inspection section has a fault; When the attenuation of the reflected signal received by the signal receiving test end is less than a set threshold, it is determined that no fault occurs in the fault inspection section.

9. A method for detecting and judging faults in a communication optical cable line according to claim 8, characterized in that: In step 300, for each fault inspection segment, a half-elimination method of the inspection span range of the inspection detection component is used to perform fault detection on the fault occurrence segment. The specific implementation method for determining the fault occurrence point is as follows: Step 301: When the fault inspection section is subjected to fault judgment using the inspection and detection component, the signal attenuation monitored by the inspection and detection component is greater than a set threshold; Step 302: Taking the starting end of the fault inspection section as the optical fiber launch point and the middle position of the fault inspection section as the signal receiving test end, determining whether the signal receiving test end has signal attenuation; Step 303: If the signal receiving test end does not experience signal attenuation, continue to move the inspection optical fiber reflection end to the middle position of the current fault inspection section, take the starting end of the fault inspection section as the optical fiber launch point, and take the middle position of the remaining other half of the fault inspection section as the signal receiving test end to determine whether the signal receiving test end experiences signal attenuation; If signal attenuation has not occurred, repeat the current step 303 until the signal receiving test end measures signal attenuation, and it is considered that there is a fault between the inspection optical fiber reflection end and the signal receiving test end at this time; If signal attenuation occurs, proceed to step 304; Step 304: If signal attenuation occurs at the signal receiving test end, the optical fiber transmitting point position is kept unchanged, and the signal receiving test end is moved to the middle position of the currently detected fault inspection section to determine whether signal attenuation occurs at the signal receiving test end.

10. A method for detecting and judging faults in a communication optical cable line according to claim 9, characterized in that: If signal attenuation does not occur, repeat step 303 until the distance between the current inspection optical fiber reflection end and the signal receiving test end is less than the set value, and the waiting fault inspection section with the same length as the fault inspection section is considered to be the fault occurrence point; If signal attenuation occurs, step 304 is repeated until the distance between the current inspection optical fiber reflection end and the signal receiving test end is less than the set value, and the fault inspection section is considered to be the fault occurrence point.

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