CN-122027023-A - Fault monitoring method and device for optical cable cross connecting cabinet

CN122027023ACN 122027023 ACN122027023 ACN 122027023ACN-122027023-A

Abstract

The invention discloses a fault monitoring method and device for an optical cable cross connecting cabinet, which relate to the technical field of fault monitoring and are used for identifying potential link degradation seedlings by monitoring a link attenuation value in real time and comparing the link attenuation value with a reference value, further collecting real-time state data such as temperature, humidity, vibration, light source stability and the like, calculating a pseudo attenuation abnormal value, judging whether the attenuation abnormal is caused by non-fault factors so as to effectively distinguish real abnormal from the pseudo abnormal, comparing the value with a preset threshold value, and if the value is not smaller than the threshold value, judging the value as non-fault fluctuation, not triggering an alarm, avoiding repair waste caused by misjudgment and maintenance cost rise, and if the value is smaller than the threshold value, judging the value as fault precursor, alarming in time, improving the accuracy and timeliness of fault early warning and reducing the judgment hysteresis problem.

Inventors

LU PENGPENG
LIN RENFAN
ZUO LIMING
LI NING
LI YANG

Assignees

安徽海瑞通科技有限责任公司

Dates

Publication Date: 20260512
Application Date: 20260304

Claims (10)

1. The fault monitoring method for the optical cable cross connecting cabinet is characterized by comprising the following steps of: Monitoring an optical link attenuation value in the optical cable cross connecting cabinet in real time, and judging whether link attenuation abnormality occurs according to the optical link attenuation value; after detecting the link attenuation abnormality, collecting real-time state data of the fiber dividing box to calculate a pseudo attenuation abnormal value; Comparing the pseudo-attenuation abnormal value with a preset pseudo-attenuation abnormal threshold, and judging that the current link attenuation abnormality belongs to the pseudo-attenuation abnormality and does not trigger fault alarm when judging that the pseudo-attenuation abnormal value is not smaller than the preset threshold according to the comparison result; when the abnormal value of the pseudo attenuation is smaller than a preset threshold value, the current link attenuation is judged to be a precursor signal of the fault of the optical cable cross connecting box, and fault alarm is triggered.
2. The fault monitoring method for an optical cable cross-connect as claimed in claim 1, wherein the steps of monitoring an optical link attenuation value in the optical cable cross-connect in real time and determining whether a link attenuation abnormality occurs according to the optical link attenuation value are as follows: Acquiring the optical power of an input end and the optical power of an output end of the optical cable cross connecting cabinet at each moment in real time, and subtracting the optical power of the output end from the optical power of the input end to serve as an optical link attenuation value of the optical cable cross connecting cabinet at the corresponding moment; Continuously acquiring link attenuation values at all times in a preset time period, comparing the link attenuation values at all times with reference attenuation values, counting the total number of the link attenuation values which are not smaller than the reference attenuation values as a first number, taking the total number of the link attenuation values in a preset time window as a second number, and dividing the first number by the second number to obtain attenuation ratio; Comparing the attenuation ratio with a preset attenuation ratio threshold, and judging that the link attenuation abnormality occurs if the attenuation ratio is not smaller than the preset attenuation ratio threshold.
3. The fault monitoring method for an optical cable cross-connect cabinet of claim 1, wherein the step of collecting real-time status data of the fiber distribution cabinet to calculate the pseudo-attenuation anomaly value comprises the steps of: and acquiring real-time state data of the fiber dividing box, calculating a route structure disturbance value and a link response inertia impact value, and subtracting the link response inertia impact value from the structure disturbance value to obtain a pseudo-attenuation abnormal value.
4. A fault monitoring method for an optical cable cross-connect cabinet according to claim 3, wherein the structural disturbance value calculating step comprises: The node with abnormal link attenuation is obtained, and the node is set as a target node; Extracting all direct adjacent nodes of the target node from the topological structure diagram, determining the rest adjacent nodes connected with each direct adjacent node, eliminating the connection between each direct adjacent node and the target node, merging the nodes into an extended adjacent node set, counting the number of nodes in the set as a first number, dividing the first number by a larger value between the first number and the preset maximum settable extended node number, and obtaining a first intermediate value; Obtaining the connection quantity of all the direct adjacent nodes, respectively determining the maximum connection quantity and the minimum connection quantity, calculating the difference between the maximum connection quantity and the minimum connection quantity, and dividing the difference by the maximum connection quantity to obtain a second intermediate value; And multiplying the first intermediate value by the second intermediate value to obtain the structural disturbance value.
5. A method for monitoring a fault in an optical cable cross-connect cabinet according to claim 3, wherein the step of calculating the link response inertial impact value comprises: acquiring optical link attenuation values at all moments in a preset time window before occurrence of link attenuation abnormality to form an attenuation sequence arranged in time sequence; Performing difference calculation on attenuation values of two adjacent moments in the attenuation sequence, namely subtracting a value of a previous moment from a value of a next moment to sequentially form a link attenuation change sequence; The link attenuation change sequence is equally divided into three sections, namely a first section, a middle section and a last section, wherein each section comprises a plurality of change data; adding the positive and negative direction switching times of the first section to the positive and negative direction switching times of the last section, subtracting twice the positive and negative direction switching times of the middle section, and dividing the absolute value of the difference value by twice the number of data of each section to obtain a fluctuation jitter ratio; The absolute value of the difference value between all adjacent change values is obtained from the change sequence, and the maximum value is found out and used as the jump amplitude; Multiplying the fluctuation jitter ratio by the maximum impact transition rate to obtain the link response inertia impact value.
6. A fault monitoring device for an optical cable cross-connect cabinet, the device comprising: The judging module is used for monitoring the attenuation value of the optical link in the optical cable cross connecting cabinet in real time and judging whether the link attenuation abnormality occurs or not according to the attenuation value of the optical link; The calculating module is used for collecting real-time state data of the fiber dividing box to calculate a pseudo-attenuation abnormal value after detecting the link attenuation abnormality; The first monitoring module is used for comparing the pseudo-attenuation abnormal value with a preset pseudo-attenuation abnormal threshold value, and judging that the current link attenuation abnormal belongs to the pseudo-attenuation abnormal and does not trigger fault alarm when judging that the pseudo-attenuation abnormal value is not smaller than the preset threshold value according to the comparison result; And the second monitoring module is used for judging that the current link attenuation abnormality is a precursor signal of the fault of the optical cable cross connecting box when the pseudo attenuation abnormality value is smaller than a preset threshold value and triggering fault alarm.
7. The fault monitoring device for an optical cable cross-connect cabinet of claim 1, wherein the determining module comprises: the optical link attenuation value module is used for acquiring the optical power of the input end and the optical power of the output end of the optical cable cross connecting box at each moment in real time, and subtracting the optical power of the output end from the optical power of the input end to serve as the optical link attenuation value of the optical cable cross connecting box at the corresponding moment; Continuously acquiring link attenuation values at all times in a preset time period, comparing the link attenuation values at all times with reference attenuation values, counting the total number of the link attenuation values which are not smaller than the reference attenuation values as a first number, taking the total number of the link attenuation values in a preset time window as a second number, and dividing the first number by the second number to obtain an attenuation ratio; And the link attenuation abnormality module is used for comparing the attenuation ratio with a preset attenuation ratio threshold value, and judging that the link attenuation abnormality occurs if the attenuation ratio is not smaller than the preset attenuation ratio threshold value.
8. The fault monitoring device for a cable cross-connect cabinet of claim 1, wherein the computing module comprises: And the pseudo-attenuation anomaly module is used for acquiring real-time state data of the fiber distribution box, calculating a route structure disturbance value and a link response inertia impact value, and subtracting the link response inertia impact value from the structure disturbance value to obtain a pseudo-attenuation anomaly value.
9. The fault monitoring device for a cable cross-connect of claim 8, wherein the computing module further comprises: The target node module is used for acquiring a node with abnormal link attenuation at present and setting the node as a target node; The first intermediate numerical value module is used for extracting all direct adjacent nodes of the target node from the topological structure diagram, determining the rest adjacent nodes connected with each direct adjacent node, eliminating the connection between each direct adjacent node and the target node, merging the nodes into an extended adjacent node set, counting the number of nodes in the set as a first number, dividing the first number by a larger value between the first number and the preset maximum settable extended node number, and obtaining a first intermediate numerical value; the second intermediate numerical value module is used for acquiring the connection quantity of all the direct adjacent nodes, respectively determining the maximum connection quantity and the minimum connection quantity, calculating the difference between the maximum connection quantity and the minimum connection quantity, and dividing the difference by the maximum connection quantity to obtain a second intermediate numerical value; and the structure disturbance module multiplies the first intermediate value and the second intermediate value to obtain a structure disturbance value.
10. The fault monitoring device for a cable cross-connect of claim 8, wherein the computing module further comprises: The attenuation sequence module is used for obtaining the optical link attenuation values at all moments in a preset time window before the occurrence of the link attenuation abnormality to form an attenuation sequence arranged in time sequence; The attenuation change module is used for carrying out difference value calculation on attenuation values of two adjacent moments in the attenuation sequence, namely subtracting a value of a previous moment from a value of a next moment to sequentially form a link attenuation change sequence; The switching frequency module is used for equally dividing the link attenuation change sequence into three sections, namely a first section, a middle section and a last section, wherein each section comprises a plurality of change data; the fluctuation jitter ratio module is used for adding the sum of the positive and negative direction switching times of the first section and the positive and negative direction switching times of the last section, subtracting twice the positive and negative direction switching times of the middle section, and dividing the absolute value of the difference value by twice the data quantity of each section to obtain the fluctuation jitter ratio; The jump module is used for obtaining absolute values of differences between all adjacent change values from the change sequence, finding out the maximum value in the absolute values as jump amplitude, dividing the jump amplitude by a preset allowable maximum jump value and obtaining the maximum jump rate; and the link response inertia impact module multiplies the fluctuation jitter ratio with the maximum impact transition rate to obtain a link response inertia impact value.

Description

Fault monitoring method and device for optical cable cross connecting cabinet Technical Field The invention relates to the technical field of fault monitoring, in particular to a fault monitoring method and device for an optical cable cross connecting cabinet. Background In the fiber-to-the-home and fiber-to-the-home networks, the optical cable cross-connecting cabinet is used as a key node of an optical link, and the optical cable cross-connecting cabinet internally comprises various optical elements such as an optical splitter, a tail fiber, an adapter, a fusion point, a fiber-jumping route and the like, and the performance degradation of any node can cause the degradation of the optical signal quality of the whole access area. Therefore, in the prior art, whether a potential fault exists in the fiber splitting box is generally judged by monitoring attenuation change of an optical link, wherein the link attenuation anomaly monitoring is one of the most core and most prospective monitoring indexes. Link attenuation, an important parameter reflecting the health of an optical link, usually changes earlier than the drop of optical power, and when the optical fiber is slightly bent, the end face of the pigtail is polluted, the splice point is aged, the performance of the optical splitter is deteriorated, or the humidity of the box is increased, the link attenuation is expressed as insertion loss increase, reflection enhancement or attenuation curve drift in the optical link. Because the attenuation anomalies often occur at the stage that the service is not interrupted and the optical power is not reduced, the link attenuation anomaly monitoring can provide early warning for potential faults in the fiber distribution box, help operation and maintenance personnel to identify hidden risks in time, avoid serious problems of further deterioration of faults into light loss, registration failure, increase of error rate and the like, and further remarkably improve the stability and maintainability of network operation. However, in an actual operating environment, link attenuation anomalies are not always a precursor to impending failure of the fiber drop box. In some special cases, link attenuation can also result in very similar characteristics to a real failure precursor. Such attenuation changes do not originate from a true degradation of the optical link, but rather are of a temporary, recoverable "false attenuation anomaly". The existing monitoring method generally cannot distinguish the two types of attenuation characteristics, and false attenuation abnormality is easily misjudged as a fiber distribution box fault, so that false alarm is triggered, unnecessary rush repair, repeated detection and resource consumption are caused, and the reliability of the whole monitoring system is reduced. Disclosure of Invention The invention aims to solve the problem that false attenuation abnormality is easily misjudged as a fiber distribution box fault so as to trigger an error alarm, and provides a fault monitoring method and device for an optical cable cross connecting box. In a first aspect of the present invention, a fault monitoring method for an optical cable cross-connecting box is first provided, where the method includes: Monitoring an optical link attenuation value in the optical cable cross connecting cabinet in real time, and judging whether link attenuation abnormality occurs according to the optical link attenuation value; after detecting the link attenuation abnormality, collecting real-time state data of the fiber dividing box to calculate a pseudo attenuation abnormal value; Comparing the pseudo-attenuation abnormal value with a preset pseudo-attenuation abnormal threshold, and judging that the current link attenuation abnormality belongs to the pseudo-attenuation abnormality and does not trigger fault alarm when judging that the pseudo-attenuation abnormal value is not smaller than the preset threshold according to the comparison result; when the abnormal value of the pseudo attenuation is smaller than a preset threshold value, the current link attenuation is judged to be a precursor signal of the fault of the optical cable cross connecting box, and fault alarm is triggered. Optionally, the step of monitoring the attenuation value of the optical link in the optical cable distributing box in real time and judging whether the link attenuation abnormality occurs according to the attenuation value of the optical link comprises the following steps: Acquiring the optical power of an input end and the optical power of an output end of the optical cable cross connecting cabinet at each moment in real time, and subtracting the optical power of the output end from the optical power of the input end to serve as an optical link attenuation value of the optical cable cross connecting cabinet at the corresponding moment; Continuously acquiring link attenuation values at all times in a preset time period, comparing the li