CN110429977B - Optical cable fiber core real-time monitoring system and method based on light source and light detector array - Google Patents
Optical cable fiber core real-time monitoring system and method based on light source and light detector array Download PDFInfo
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- CN110429977B CN110429977B CN201811130725.7A CN201811130725A CN110429977B CN 110429977 B CN110429977 B CN 110429977B CN 201811130725 A CN201811130725 A CN 201811130725A CN 110429977 B CN110429977 B CN 110429977B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/07—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/07—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems
- H04B10/075—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems using an in-service signal
- H04B10/079—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems using an in-service signal using measurements of the data signal
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/07—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems
- H04B10/075—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems using an in-service signal
- H04B10/079—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems using an in-service signal using measurements of the data signal
- H04B10/0791—Fault location on the transmission path
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/07—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems
- H04B10/075—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems using an in-service signal
- H04B10/079—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems using an in-service signal using measurements of the data signal
- H04B10/0795—Performance monitoring; Measurement of transmission parameters
- H04B10/07955—Monitoring or measuring power
Abstract
The invention provides a real-time monitoring system and a method for an optical cable fiber core based on a light source and light detector array, aiming at monitoring operation and maintenance of the optical cable fiber core, the invention adopts the technical scheme that the light source array is arranged on one detection node of a vacant fiber core in an operating optical cable, the light detector array is arranged on the opposite end detection node of the vacant fiber core, the real-time power loss of the vacant fiber core of an optical cable link is monitored in real time, monitoring data is analyzed, then a link evaluation result is provided, and alarm information is correspondingly sent out, so that the monitoring of the operating state of the optical link is realized, and the manual measurement mode after the link fails is replaced. The invention takes a remote monitoring station as a basis, a high-performance network communication processing system as a support and monitoring software as a core, and provides complete and advanced centralized monitoring and comprehensive management functions for an optical cable link of a power communication network.
Description
Technical Field
The invention relates to an optical cable fiber core real-time monitoring system based on a light source and light detector array, which is used for monitoring information such as optical fiber degradation condition, spare fiber core quality and the like of a communication optical cable by using the light source and light detector array, and a set of optical cable fiber core real-time monitoring system is constructed. The invention relates to the field of optical cable monitoring systems, in particular to monitoring of optical cable fiber core quality, fiber core information management and the like in power communication.
Background
With the development of communication technology, optical fiber communication has become the main technical choice for power communication, wherein the infrastructure of optical fiber communication is optical fiber cable. In recent years, the risk of optical cable faults is increased continuously due to external destruction such as municipal construction and accidents such as fire, meanwhile, the scale of an optical communication network is enlarged continuously, the transmission rate is improved continuously, and the requirements on the operation and maintenance level of the optical cable are more strict. Therefore, the safe and stable operation of the power optical fiber communication system is ensured, and the primary task is to ensure the safe operation of the power optical cable. At present, the operation and maintenance work of the power optical cable, such as daily routing inspection, standby fiber core quality test, optical cable data collection and arrangement and the like of the power optical cable, mainly depends on manual means, and has the following defects:
i, a maintenance team is huge, and a large amount of manpower and material resources are consumed;
II, the testing period is too long, and the real-time performance of optical cable data is poor;
III, the data management is complex, and the influence of human and process factors exists;
IV, the resource control is passive, and the advance prevention of the fault is difficult to realize.
V, the problems of incomplete measurement data, high instrument cost and the like exist in manual instrument operation.
The application of the smart power grid puts higher requirements on the operation reliability of the power communication network, the operation and maintenance level of the power communication optical cable is urgently required to be improved, and the online operation and maintenance of the optical cable is an inevitable trend of the operation and maintenance of the power optical cable.
In order to avoid the influence on a service channel of an on-line transmission network and ensure the stability of operation to the maximum extent, the optical cable fiber core real-time monitoring system monitors an idle fiber core in a fiber splitting optical power idle fiber core monitoring mode, so that the influence of a test pulse wave on the transmission of an on-line service wave during the monitoring of a fiber combining optical power fiber core can be avoided. When the optical cable fiber core real-time monitoring system provided by the invention is used for monitoring the operation indexes of the optical cable fiber core in real time, the light source and light detector array is adopted, the array can monitor a plurality of fiber cores simultaneously, and the real-time operation state of the optical cable fiber core can be acquired to the greatest extent. When the monitored fiber core loss exceeds a threshold value, alarm information is sent out immediately, so that the optical cable link realizes complete centralized monitoring and comprehensive management, the monitoring work of the optical cable link is intelligentized, the cost of manpower and material resources for cable maintenance is effectively reduced, and the optical cable maintenance management efficiency is obviously improved.
Disclosure of Invention
The invention provides an optical cable fiber core real-time monitoring system based on a light source and light detector array, which mainly solves the technical problems by the following technical scheme:
the utility model provides an optical cable fibre core real-time supervision system based on light source optical detector array which characterized in that: comprises that
A light source array: the optical fiber detection unit is arranged at one end of a spare fiber core in the optical cable link and used for extracting detection light, acquiring light source output power according to the detection light, outputting data and providing a light source signal for the optical cable core detection unit;
the light detector array: the other end of the spare fiber core arranged in the optical cable link is used for acquiring the input power of the light source and then outputting data;
the monitoring center: and receiving data transmitted by the light source array and the light detector array through a data transmission network, processing the data, calculating the running state of a target fiber core, and monitoring an optical cable link in real time.
The optical cable fiber core real-time monitoring system based on the light source and light detector array comprises a distributed feedback laser, a multi-channel light splitter, a plurality of channel detection light extraction devices and a light source output power detection array which are connected with each other; each output end of the multichannel light splitter is correspondingly connected with a plurality of spare fiber cores, the detection light is extracted by the extraction device one by one between each spare fiber core and the multichannel light splitter and is transmitted to the light source output power detection array, and then the detection light is transmitted to the data transmission network and the output power data of the light source array is uploaded to the monitoring center.
The optical cable fiber core real-time monitoring system based on the light source and light detector array comprises a plurality of light detectors, each spare fiber core is provided with one light detector, the outputs of all the light detectors are connected to an input power detection disc, and the input power detection disc is connected with a data transmission network and uploads the input power data of the light detector array to a monitoring center.
In the optical cable fiber core real-time monitoring system based on the light source and light detector array, the monitoring center monitoring server analyzes the attenuation power of a first group of vacant fiber cores sequenced by fiber cores of the monitoring optical cable, namely, the light source output power data output by the light source array of the monitoring channel and the input power data output by the light detector array are analyzed and processed to obtain the attenuation power of the vacant fiber cores, the obtained attenuation power is compared with the preset fiber core attenuation power, when the difference value exceeds a limited range, the system is checked by analyzing the detection optical signal, if the system is in a fault, fault information is prompted, otherwise, the fiber core attenuation power analysis is carried out on all the fiber cores of the monitored optical cable, all abnormal information is collected, and a fiber core attenuation overrun warning signal is sent.
A real-time monitoring method for an optical cable fiber core based on a light source and light detector array is characterized in that:
the light source array endows the light source signal of each channel and the light source power value output by the light source signal of each channel with a unique position code corresponding to each channel, and uploads the unique position code to the monitoring center server along with the data signal;
when the optical detectors of all channels in the optical detector array input the output power values into the power detection disc, unique position codes corresponding to all channels are given and uploaded to the monitoring center server along with data signals;
and after receiving the data information of the light source array and the optical detector array, the monitoring center server correspondingly extracts the data information according to the unique position code of the data channel, so that the light source signal information of the vacant fiber cores and the optical detector signal information are in one-to-one correspondence.
In the optical cable fiber core real-time monitoring method based on the light source and light detector array, the codes are 6 bits, the first two bits are the optical cable serial numbers, and the last four bits are the channel serial numbers of the fiber cores.
The optical cable fiber core real-time monitoring method based on the light source and light detector array specifically comprises the following steps
And 2, analyzing the attenuation power of the first group of vacant fiber cores sequenced by the fiber cores of the monitoring optical cable by the monitoring center monitoring server, namely analyzing and processing the light source output power data output by the light source array of the monitoring channel and the input power data output by the light detector array, and obtaining the real-time monitoring attenuation power of the vacant fiber cores in a sampling period through formulas (1) and (2).
Pi＝Pi_source÷1％×99％-Pi_out (1)
In the formulae (1) and (2), PiCore link attenuation power, P, for the ith sampled supervisory channel during the sampling periodi_sourceThe light source power P of the monitoring channel output by the light source output power array for the ith sampling in the sampling periodi_outThe optical detection signal power of the monitoring channel is sampled for the ith time in the sampling period, n times of sampling is completed in each sampling period,
the core link attenuation power of the monitoring channel is averaged for n times in a sampling period.
And 3, comparing the real-time attenuation power of the fiber core of the monitoring channel with the attenuation set value of the fiber core, and when the difference value does not exceed the set 3dB threshold value, normally recording the normal condition of the fiber core of the monitoring channel by the fiber core. If the value exceeds the threshold value, the light source signal value of the channel corresponding to the fiber core is extracted firstly and compared with the light source signal value of the channel in the previous period; extracting the output signal value of the distributed feedback laser, comparing the output signal value with the output signal value of the previous period, and recording the monitoring channel fiber core attenuation overrun warning after eliminating the system hardware fault if the two groups of values do not exceed the power fluctuation range of the distributed feedback laser; and otherwise, reporting the abnormal alarm of the light source array channel if any one of the two groups of numerical value changes exceeds the power fluctuation range of the distributed feedback laser.
And 4, measuring the attenuation of fiber cores of all other channels one by one, repeatedly finishing the processing process, intensively generating the attenuation conditions of the fiber cores of all the channels, and reporting an optical cable interruption alarm after eliminating the hardware fault of the system.
The invention is based on a remote monitoring station, takes a high-performance network communication processing system as a support and takes monitoring software as a core, provides complete and advanced centralized monitoring and comprehensive management functions for an optical cable link of a power communication network, and is particularly represented as follows: 1) monitoring the degradation condition of the optical cable line in real time, finding out hidden dangers of the optical cable in time and reducing the fault rate of the optical cable; 2) the electronization of optical cable information query, report and processing is realized, real-time reference data is provided for optical cable fault first-aid repair, and the optical cable fault repair duration is shortened; 3) the standby fiber core condition is reflected in real time, a standby channel is provided for optical cable link failure or optical cable channel switching in time, and normal operation of the service is guaranteed; 4) the optical cable link monitoring work is intelligent, manpower and material resources are saved, the cable maintenance cost is reduced, and the optical cable maintenance management efficiency is improved;
drawings
FIG. 1 is a topological structure diagram of a real-time monitoring system for a fiber core of an optical cable.
FIG. 2 is a flow chart of the monitoring center monitoring server over-limit processing of the fiber core threshold.
Detailed Description
The present invention is described in detail below with reference to the attached drawings and the detailed description.
(1) System architecture
As shown in fig. 1, the optical fiber core real-time monitoring system based on the light source and light detector array has an overall architecture including three layers, specifically as follows:
the bottom layer is an infrastructure, as shown in figure 1, and mainly comprises a light source array, a light detector array and a vacant fiber core in an optical cable link, so that real-time measurement of attenuation of the optical cable link is realized. And the data of the light source array and the light detector array are transmitted to the monitoring center through a data transmission network of the optical fiber backbone network.
The middle layer is a monitoring server layer and comprises a geographic information map, an SQL database and a background control program. The monitoring server completes real-time analysis of link attenuation, alarm analysis, data management, message distribution, synchronization of resources and alarms and management of monitoring equipment.
The top layer is a client, and a user is connected to the optical cable monitoring server through the client to finish interface representation and realize various operation functions of the system.
The optical cable fiber core real-time monitoring system realizes the intercommunication with other network management system databases by providing a standardized upper network interface on a background server, thereby achieving the resource sharing.
(2) Workflow process
As shown in fig. 2, the optical fiber core real-time monitoring system uses an optical fiber link between two communication nodes as a basic monitoring unit, and configures a set of optical link monitoring equipment. Placing a light source array at one of the communication nodes, providing optical signals for detection of the vacant fiber cores, and simultaneously uploading the luminous power of the signals to a monitoring server through a data communication network; and a light detector array is arranged at the other node and used for detecting the optical signal power output from the vacant fiber cores and uploading the detected optical signal power to the monitoring server. The monitoring server processes the received various information. Calculating the real-time loss of the spare fiber core of the monitored link by the following formula:
Pi＝Pi_source÷1％×99％-Pi_out (1)
in the formulae (1) and (2), PiCore link attenuation power, P, for the ith sampled supervisory channel during the sampling periodi_sourceThe light source power P of the monitoring channel output by the light source output power array for the ith sampling in the sampling periodi_outThe optical detection signal power of the monitoring channel is sampled for the ith time in the sampling period, n times of sampling is completed in each sampling period,
the core link attenuation power of the monitoring channel is averaged for n times in a sampling period.
And the monitoring center server takes the P as attenuation power of the fiber core of the monitoring channel, reflects the state of the monitored optical cable link through the change of real-time attenuation, provides a link evaluation result, and correspondingly sends alarm information, thereby realizing the real-time monitoring of the optical cable link. The client side realizes the operation functions of monitoring data query, manual detection and report generation.
(3) Design of light source array
The light source array is composed of a distributed feedback laser, a multi-channel light splitter, a channel detection light extraction device and a light source output power detection array. The distributed feedback laser emits continuous light source signals, the continuous light source signals enter the multi-channel light splitter, and meanwhile, self light emitting power detection signals are sent to the light source output power detection array to record the numerical value of the light emitting power. The multi-channel light splitter divides the light source signals into different channels, and in each channel, the channel detection light extraction device extracts 1% of detection light and sends the detection light to the light source output power detection array to reflect the light source power value of each channel outlet. And the remaining 99% of light of each channel enters the vacant fiber core through the channel detection light extraction device to serve as a light source signal of the optical cable fiber core detection unit. The light source output power detection array converts various received signals into data signals, gives corresponding codes, and uploads the data signals to the monitoring data server through a data communication network.
(4) Design of photodetector array
The photodetector array is composed of a group of photodetectors and an input power detection disk. Each optical detector is connected with a vacant fiber core, receives optical signals attenuated by the fiber core, performs photoelectric conversion, and transmits numerical information to the input power detection panel. The input power detection disc converts the received numerical information into a data signal, gives a corresponding code, and uploads the data signal to the monitoring data server through a data communication network.
(5) Data processing mode
a) Attenuation calculation of vacant core
After receiving the data information sent by the light source array and the optical detector array, the monitoring server extracts the data reflecting the light source signal and the optical detector signal of the same fiber core according to the codes so as to ensure that the light source signal information and the optical detection signal information at two ends of the same vacant fiber core are in one-to-one correspondence. Under the condition, subtracting the value of the optical detector signal from the value of the optical source signal to obtain the link attenuation power of the vacant fiber core. In order to further eliminate system errors, during data processing, the attenuation power of the fiber core is sampled for multiple times in a period and averaged.
b) Core threshold overrun handling
In the monitoring center, the monitoring server processes the fiber core threshold overrun, as shown in fig. 2. And the monitoring server sets the attenuation set values of each group of m fiber cores one by one according to the statistical value of the attenuation of the fiber cores of the optical cable. And measuring the attenuation power of a first group of vacant fiber cores in the fiber core of the optical cable in a sampling period, and carrying out mean value calculation processing to obtain the real-time attenuation power of the fiber core of the monitoring channel. And comparing the real-time attenuation power of the fiber core of the monitoring channel with the attenuation set value of the fiber core, and when the difference value does not exceed the set threshold value by 3dB, the fiber core operates normally and the condition of the fiber core of the monitoring channel is recorded normally. If the value exceeds the threshold value, the light source signal value of the channel corresponding to the fiber core is extracted firstly and compared with the light source signal value of the channel in the previous period; secondly, extracting the output signal value of the distributed feedback laser, and comparing the output signal value with the output signal value in the previous period; and after the two groups of numerical value changes do not exceed the power fluctuation range of the distributed feedback laser, carrying out self-inspection on the optical detector and the input power detection disc of the channel corresponding to the fiber core in the next step, and otherwise, reporting that the light source array channel is abnormal if the two groups of numerical value changes exceed the power fluctuation range of the distributed feedback laser. After the system hardware fault is eliminated, the monitoring channel fiber core attenuation overrun warning is recorded, the fiber cores of other channels of the group are measured one by one, the processing process is repeatedly completed, the fiber core attenuation conditions of all the channels are generated in a centralized mode, and the optical cable interruption warning is reported.
The specific examples described herein are merely illustrative of the spirit of the invention. Various modifications or additions may be made or substituted in a similar manner to the specific embodiments described herein by those skilled in the art without departing from the spirit of the invention or exceeding the scope thereof as defined in the appended claims.
Claims (5)
1. A real-time optical cable fiber core monitoring method based on a light source and light detector array is characterized in that a real-time optical cable fiber core monitoring system based on a light source and light detector array comprises
A light source array: the optical fiber detection unit is arranged at one end of a spare fiber core in the optical cable link and used for extracting detection light, acquiring light source output power according to the detection light, outputting data and providing a light source signal for the optical cable core detection unit;
the light detector array: the other end of the spare fiber core arranged in the optical cable link is used for acquiring the input power of the light source and then outputting data;
the monitoring center: receiving data transmitted by the light source array and the optical detector array through a data transmission network, processing the data, calculating the running state of a target fiber core, and monitoring an optical cable link in real time;
the method comprises the following steps:
the light source array endows the light source signal of each channel and the light source power value output by the light source signal of each channel with a unique position code corresponding to each channel, and uploads the unique position code to the monitoring center server along with the data signal;
when the optical detectors of all channels in the optical detector array input the output power values into the power detection disc, unique position codes corresponding to all channels are given and uploaded to the monitoring center server along with data signals;
after receiving the data information of the light source array and the optical detector array, the monitoring center server correspondingly extracts the data according to the unique position code of the data channel, so that the light source signal information of the vacant fiber cores and the optical detector signal information are in one-to-one correspondence;
specifically comprises
Step 1, setting the attenuation power of fiber cores of monitoring channels in M channels one by one, and initially assigning values;
step 2, the monitoring center monitoring server analyzes the attenuation power of a first group of vacant fiber cores sequenced by the fiber cores of the monitoring optical cable, namely, the light source output power data output by the light source array of the monitoring channel and the input power data output by the light detector array are analyzed and processed, and the real-time monitoring attenuation power of the vacant fiber cores in a sampling period is obtained through formulas (1) and (2);
Pi＝Pi_source÷1％×99％-Pi_out (1)
in the formulae (1) and (2), PiCore link attenuation power, P, for the ith sampled supervisory channel during the sampling periodi_sourceThe light source power P of the monitoring channel output by the light source output power array for the ith sampling in the sampling periodi_outThe optical detection signal power of the monitoring channel is sampled for the ith time in the sampling period, n times of sampling is completed in each sampling period,
the fiber core link attenuation power of the monitoring channel averaged for n times in a sampling period;
step 3, comparing the real-time attenuation power of the fiber core of the monitoring channel with a fiber core attenuation set value, and when the difference value does not exceed the set 3dB threshold value, the fiber core operates normally and the condition of the fiber core of the monitoring channel is recorded normally; if the value exceeds the threshold value, the light source signal value of the channel corresponding to the fiber core is extracted firstly and compared with the light source signal value of the channel in the previous period; extracting the output signal value of the distributed feedback laser, comparing the output signal value with the output signal value of the previous period, and recording the monitoring channel fiber core attenuation overrun warning after eliminating the system hardware fault if the two groups of values do not exceed the power fluctuation range of the distributed feedback laser; otherwise, if any one of the two groups of numerical value changes and exceeds the power fluctuation range of the distributed feedback laser, reporting an abnormal alarm of the light source array channel;
and 4, measuring the attenuation of fiber cores of all other channels one by one, repeatedly finishing the processing process, intensively generating the attenuation conditions of the fiber cores of all the channels, and reporting an optical cable interruption alarm after eliminating the hardware fault of the system.
2. The method of claim 1 for real-time monitoring of the fiber core of an optical cable based on an array of light sources and light detectors, wherein: the code is 6 bits, the first two bits are the optical cable number, and the last four bits are the channel number of the fiber core.
3. The method of claim 1 for real-time monitoring of the fiber core of an optical cable based on an array of light sources and light detectors, wherein: the light source array comprises a distributed feedback laser, a multi-channel light splitter, a plurality of channel detection light extraction devices and a light source output power detection array which are connected; each output end of the multichannel light splitter is correspondingly connected with a plurality of spare fiber cores, the detection light is extracted by the extraction device one by one between each spare fiber core and the multichannel light splitter and is transmitted to the light source output power detection array, and then the detection light is transmitted to the data transmission network and the output power data of the light source array is uploaded to the monitoring center.
4. The method of claim 1 for real-time monitoring of the fiber core of an optical cable based on an array of light sources and light detectors, wherein: the optical detector array comprises a plurality of optical detectors, each spare fiber core is provided with one optical detector, the outputs of all the optical detectors are connected to an input power detection disc, and the input power detection disc is connected with a data transmission network and uploads the input power data of the optical detector array to a monitoring center.
5. The method of claim 1 for real-time monitoring of the fiber core of an optical cable based on an array of light sources and light detectors, wherein: the monitoring center monitoring server analyzes the attenuation power of a first group of vacant fiber cores sequenced by fiber cores of the monitoring optical cable, namely, the light source output power data output by the light source array of the monitoring channel and the input power data output by the light detector array are analyzed and processed to obtain the attenuation power of the vacant fiber cores, the obtained attenuation power is compared with the preset fiber core attenuation power, when the difference value exceeds a limited range, the system is checked for self fault by analyzing the detection optical signal, if the self fault is detected, fault information is prompted, otherwise, the fiber core attenuation power analysis is carried out on all the fiber cores of the monitored optical cable, all abnormal information is collected, and a fiber core attenuation over-limit warning signal is sent.
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| CN1333454A (en) * | 2000-07-12 | 2002-01-30 | 信息产业部武汉邮电科学研究院 | Optical cable real time monitoring system |
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