CN115406490A - Optical cable pipeline monitoring method, device, equipment and storage medium - Google Patents
Optical cable pipeline monitoring method, device, equipment and storage medium Download PDFInfo
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Abstract
The invention relates to the technical field of optical fiber communication, and discloses an optical cable pipeline monitoring method, an optical cable pipeline monitoring device, optical cable pipeline monitoring equipment and a storage medium. The method comprises the following steps: transmitting pulse light signals to a target optical cable laid in an optical cable pipeline, collecting backward scattering light reflected by the pulse light signals in the target optical cable after the pulse light signals are influenced by a plurality of environmental state quantities in the optical cable pipeline, carrying out optical branching processing on the backward scattering light according to a preset scattering mode to obtain multiple paths of scattering light, transmitting the multiple paths of scattering light to corresponding environment monitoring units, demodulating the multiple paths of scattering light according to corresponding demodulation types to obtain monitoring signals representing the environmental state quantities, and sending the monitoring signals to a pipeline management platform; and calculating a plurality of characteristic parameters of a preset environment state quantity combination and the early warning value of each characteristic parameter to generate monitoring early warning information of the optical cable pipeline. This application has improved the monitoring efficiency to current pipeline optical cable system through the monitoring to multiple monitoring parameter simultaneously.
Description
Technical Field
The invention relates to the technical field of optical fiber communication, in particular to an optical cable pipeline monitoring method, an optical cable pipeline monitoring device, optical cable pipeline monitoring equipment and a storage medium.
Background
With the continuous development of urban construction, the cable is used as a carrier for transmitting electric power and the optical cable is used as a carrier for electric power communication, and an intricate underground power supply and communication distribution network is formed in underground pipelines of each large city. Because the number of cables and optical cables installed in the power optical cable pipeline is large, and the distribution range of the cables and optical cables is wide, and the pipeline is often in a severe environment (such as rain, sewage and sludge, channel fire, road and other pipeline construction and the like), the power optical cable in the pipeline needs to be monitored, patrolled and maintained in real time in order to ensure that normal communication is not interrupted.
Nowadays, through adopting optical fiber sensing technology, regard optic fibre in the pipeline optical cable as the sensor, utilize optic fibre to come environmental factor such as temperature in the perception environment, strain, vibration, generate corresponding detection light signal, and analyze the detection light signal and obtain corresponding monitoring result, but because the optic fibre sensing system principle that different environmental factor used is different, monitoring content is comparatively single, and the processing procedure of optic fibre sensing control is more and complicated, it carries out real-time supervision to whole pipeline optical cable to be difficult to form a unified monitoring system, so that the efficiency greatly reduced of optical cable pipeline monitoring. Namely, the monitoring efficiency of the existing pipeline optical cable system is low.
Disclosure of Invention
The invention mainly aims to solve the problem of low monitoring efficiency of the existing pipeline optical cable system.
The invention provides an optical cable pipeline monitoring method, which is applied to an optical cable pipeline monitoring system, wherein the optical cable pipeline monitoring system comprises an integrated monitoring host and a pipeline management platform in communication connection with the monitoring host, the integrated monitoring host is provided with a plurality of environment monitoring units with different demodulation types, and the optical cable pipeline monitoring method comprises the following steps: transmitting pulse light signals to a target optical cable laid in an optical cable pipeline through the integrated monitoring host, collecting backscattered light reflected by the pulse light signals in the target optical cable after being influenced by a plurality of environmental state quantities in the optical cable pipeline, performing optical branching processing on the backscattered light according to a preset scattering mode to obtain multiple paths of scattered light, and transmitting the multiple paths of scattered light to corresponding environment monitoring units; demodulating each path of scattered light at each environment monitoring unit according to the corresponding demodulation type to obtain a monitoring signal representing each environment state quantity, and sending the monitoring signal to the pipeline management platform; and calculating a plurality of characteristic parameters corresponding to a preset environment state quantity combination in the monitoring signals through the pipeline management platform, respectively calculating early warning values of the characteristic parameters based on the laying characteristic attributes of the optical cable pipeline, and generating monitoring early warning information of the optical cable pipeline based on the early warning values.
Optionally, in a first implementation manner of the first aspect of the present invention, the transmitting, by the integrated monitoring host, a pulsed light signal into a target optical cable laid in an optical cable conduit includes: performing signal coupling on a laser signal monitored by a preset optical cable pipeline through the integrated monitoring host to obtain two paths of continuous laser signals and local oscillation optical signals in a preset proportion; and carrying out pulse modulation and power amplification on the continuous laser signal to obtain a pulse light signal monitored by the optical cable pipeline, and transmitting the pulse light signal to a target optical cable laid in the optical cable pipeline.
Optionally, in a second implementation manner of the first aspect of the present invention, the performing optical splitting processing on the backscattered light according to a preset scattering manner to obtain multiple paths of scattered light includes: determining a plurality of reference state quantities monitored by the integrated monitoring host, and dividing each reference state quantity into a first state quantity set and a second state quantity set; selecting a preset first scattering mode based on the first state quantity set, and carrying out optical interference and filtering on the backward scattering light by using the local oscillator optical signal to obtain three paths of scattering light; and selecting a preset second scattering mode based on the second state quantity set, and performing optical interference and frequency mixing on the backward scattering light by using the local oscillator optical signal to obtain two paths of scattering light.
Optionally, in a third implementation manner of the first aspect of the present invention, the first state quantity set includes transmission loss, first vibration, and temperature, and the selecting a preset first scattering manner based on the first state quantity set, and performing optical interference and filtering on the backscattered light by using the local oscillator optical signal to obtain three paths of scattered light includes: based on the transmission loss state, the first vibration state and the temperature state, performing optical shunt coupling on the back scattering light according to a preset scattering mode to correspondingly obtain a path of scattering light of the transmission loss optical path, a path of scattering light of the temperature optical path and a path of scattering light of the first vibration optical path; respectively carrying out optical signal coupling on scattered light of the temperature light path and scattered light of the first vibration light path by adopting the local oscillator optical signal to correspondingly obtain first coupling scattered light and second coupling scattered light; and performing optical filtering on the first coupling scattered light and the second coupling scattered light, and selecting scattered light of a preset high frequency band from the first coupling scattered light after the optical filtering as final scattered light of the temperature light path, and selecting scattered light of a preset low frequency band from the second coupling scattered light after the optical filtering as final scattered light of the first vibration light path.
Optionally, in a fourth implementation manner of the first aspect of the present invention, the environment monitoring unit includes a transmission loss monitoring unit, a first vibration monitoring unit, and a temperature monitoring unit, where the monitoring signal includes a transmission loss signal, a first vibration signal, and a temperature signal, and the demodulating, at each environment monitoring unit, each path of scattered light according to a corresponding demodulation type to obtain a monitoring signal indicating each environment state quantity, includes: performing photoelectric conversion and phase-locked demodulation on scattered light of the transmission loss optical path through the transmission loss monitoring unit to obtain an orthogonal component signal and an in-phase component signal, and performing signal compensation on the orthogonal component signal and the in-phase component signal to obtain a transmission loss signal; performing photoelectric conversion on the final scattered light of the first vibration light path through the first vibration monitoring unit to obtain a high-frequency electric signal, and performing Fourier change and analog-to-digital conversion on the high-frequency electric signal to obtain a first vibration signal; and performing photoelectric conversion and analog-to-digital conversion on the final scattered light of the temperature light path through the temperature monitoring unit to obtain an initial digital signal, and performing high-frequency phase locking on the initial digital signal to obtain a temperature signal.
Optionally, in a fifth implementation manner of the first aspect of the present invention, the second state quantity set includes second vibration and temperature/strain, and the selecting a preset second scattering manner based on the second state quantity set, and performing optical interference and frequency mixing on the backscattered light by using the local oscillator optical signal to obtain two paths of scattered light, includes: based on the second vibration state and the strain state, performing optical shunt coupling on the back scattering light according to a preset scattering mode to correspondingly obtain a path of scattering light of the second vibration and a path of scattering light of the strain light path; and carrying out optical frequency mixing on the scattered light of the strain optical path by adopting the local oscillator optical signal to obtain the final scattered light of the strain optical path.
Optionally, in a sixth implementation manner of the first aspect of the present invention, the environment monitoring unit includes a second vibration monitoring unit and a temperature monitoring unit, the monitoring signal includes a second vibration signal and a temperature signal, and the demodulating, at each environment monitoring unit, each path of scattered light according to a corresponding demodulation type to obtain a monitoring signal representing each environmental state quantity includes: carrying out in-phase quadrature demodulation on scattered light of the second vibration light path through the second vibration monitoring unit to obtain two paths of quadrature phase difference signals, and carrying out photoelectric detection on the two paths of quadrature phase difference signals to obtain a second vibration signal; and performing photoelectric conversion and analog-to-digital conversion on the final scattered light to be demodulated of the strain light path through the strain monitoring unit, and performing Lorentz fitting on the signal subjected to the analog-to-digital conversion to obtain a strain signal.
A second aspect of the present invention provides an optical cable pipeline monitoring device, including: the signal branching module is used for transmitting pulse light signals to a target optical cable laid in an optical cable pipeline through the integrated monitoring host, collecting backward scattering light reflected by the pulse light signals in the target optical cable after being influenced by a plurality of environmental state quantities in the optical cable pipeline, carrying out optical branching processing on the backward scattering light according to a preset scattering mode to obtain multiple paths of scattering light, and transmitting the multiple paths of scattering light to corresponding environment monitoring units; the signal demodulation module is used for demodulating each path of scattered light at each environment monitoring unit according to the corresponding demodulation type to obtain a monitoring signal representing each environment state quantity, and sending the monitoring signal to the pipeline management platform; and the monitoring analysis module is used for calculating a plurality of characteristic parameters corresponding to the preset environment state quantity combination in the monitoring signals through the pipeline management platform, respectively calculating early warning values of the characteristic parameters based on the laying characteristic attributes of the optical cable pipeline, and generating monitoring early warning information of the optical cable pipeline based on the early warning values.
Optionally, in a first implementation manner of the second aspect of the present invention, the signal splitting module includes: the laser coupling unit is used for performing signal coupling on a laser signal monitored by a preset optical cable pipeline through the integrated monitoring host to obtain two paths of continuous laser signals and local oscillator optical signals in a preset proportion; and the pulse modulation unit is used for performing pulse modulation and power amplification on the continuous laser signal to obtain a pulse light signal monitored by the optical cable pipeline and transmitting the pulse light signal to a target optical cable laid in the optical cable pipeline.
Optionally, in a second implementation manner of the second aspect of the present invention, the signal splitting module includes: a state determination unit, configured to determine a plurality of reference state quantities monitored by the integrated monitoring host, and divide each of the reference state quantities into a first state quantity set and a second state quantity set; the first branch unit is used for selecting a preset first scattering mode based on the first state quantity set, and performing optical interference and filtering on the backward scattering light by using the local oscillator optical signal to obtain three paths of scattering light; and the second branching unit is used for selecting a preset second scattering mode based on the second state quantity set, and performing optical interference and frequency mixing on the backward scattering light by using the local oscillator optical signal to obtain two paths of scattering light.
Optionally, in a third implementation manner of the second aspect of the present invention, the first branching unit is configured to: based on the transmission loss state, the first vibration state and the temperature state, performing optical shunt coupling on the back scattering light according to a preset scattering mode to correspondingly obtain a path of scattering light of the transmission loss optical path, a path of scattering light of the temperature optical path and a path of scattering light of the first vibration optical path; respectively carrying out optical signal coupling on scattered light of the temperature light path and scattered light of the first vibration light path by adopting the local oscillator optical signal to correspondingly obtain first coupling scattered light and second coupling scattered light; and performing optical filtering on the first coupling scattered light and the second coupling scattered light, selecting scattered light of a preset high frequency band from the first coupling scattered light after the optical filtering as final scattered light of the temperature light path, and selecting scattered light of a preset low frequency band from the second coupling scattered light after the optical filtering as final scattered light of the first vibration light path.
Optionally, in a fourth implementation manner of the second aspect of the present invention, the signal demodulation module includes: the first demodulation unit is used for performing photoelectric conversion and phase-locked demodulation on scattered light of the transmission loss optical path through the transmission loss monitoring unit to obtain an orthogonal component signal and an in-phase component signal, and performing signal compensation on the orthogonal component signal and the in-phase component signal to obtain a transmission loss signal; the second demodulation unit is used for performing photoelectric conversion on the final scattered light of the first vibration light path through the first vibration monitoring unit to obtain a high-frequency electric signal, and performing Fourier change and analog-to-digital conversion on the high-frequency electric signal to obtain a first vibration signal; and the third demodulation unit is used for performing photoelectric conversion and analog-to-digital conversion on the final scattered light of the temperature light path through the temperature monitoring unit to obtain an initial digital signal, and performing high-frequency phase locking on the initial digital signal to obtain a temperature signal.
Optionally, in a fifth implementation manner of the second aspect of the present invention, the second shunting unit is configured to: based on the second vibration state and the strain state, performing optical shunt coupling on the back scattering light according to a preset scattering mode to correspondingly obtain a path of scattering light of the second vibration and a path of scattering light of the strain light path; and carrying out optical frequency mixing on the scattered light of the strain optical path by adopting the local oscillator optical signal to obtain the final scattered light of the strain optical path.
Optionally, in a sixth implementation manner of the second aspect of the present invention, the signal demodulation module further includes: the fourth demodulation unit is used for carrying out in-phase quadrature demodulation on the scattered light of the second vibration light path through the second vibration monitoring unit to obtain two paths of quadrature phase difference signals, and carrying out photoelectric detection on the two paths of quadrature phase difference signals to obtain a second vibration signal; and the fifth demodulation unit is used for performing photoelectric conversion and analog-to-digital conversion on the final scattered light to be demodulated of the strain optical path through the strain monitoring unit, and performing Lorentz fitting on the signals subjected to the analog-to-digital conversion to obtain strain signals.
A third aspect of the present invention provides an optical cable pipeline monitoring apparatus, including: a memory and at least one processor, the memory having instructions stored therein; the at least one processor invokes the instructions in the memory to cause the fiber optic cable duct monitoring device to perform the various steps of the fiber optic cable duct monitoring method described above.
A fourth aspect of the present invention provides a computer-readable storage medium having stored therein instructions, which, when run on a computer, cause the computer to perform the steps of the cable duct monitoring method described above.
In the technical scheme provided by the invention, a pulse light signal is transmitted to a target optical cable laid in an optical cable pipeline through an integrated monitoring host, backward scattering light reflected after the pulse light signal in the target optical cable is influenced by a plurality of environmental state quantities in the optical cable pipeline is collected, the backward scattering light is subjected to optical branching processing according to a preset scattering mode to obtain multiple paths of scattering light, and each path of scattering light is transmitted to a corresponding environmental monitoring unit; demodulating each path of scattered light at each environment monitoring unit according to the corresponding demodulation type to obtain a monitoring signal representing each environment state quantity, and sending the monitoring signal to a pipeline management platform; and calculating a plurality of characteristic parameters corresponding to the preset environment state quantity combination in the monitoring signals through a pipeline management platform, respectively calculating the early warning value of each characteristic parameter based on the laying characteristic attribute of the optical cable pipeline, and generating monitoring early warning information of the optical cable pipeline based on the early warning value. Compared with the prior art, through transmitting corresponding pulse optical signals to the target optical cable, the integrated monitoring host is used for collecting the backscattered light affected by various environmental state quantities, then the backscattered light is subjected to optical branching to obtain scattered light corresponding to a scattering mode, then the scattered light corresponding to each environmental monitoring unit is subjected to optical demodulation, and the demodulated signals are subjected to optical cable pipeline monitoring analysis to obtain the running state early warning information of the current pipeline optical cable. The simultaneous monitoring of various environmental state quantities in the pipeline optical cable is realized by utilizing one optical cable, and the monitoring efficiency of the existing pipeline optical cable system is improved.
Drawings
FIG. 1 is a schematic view of a first embodiment of a cable duct monitoring method according to an embodiment of the present invention;
FIG. 2 is a schematic view of a second embodiment of a cable duct monitoring method according to an embodiment of the present invention;
FIG. 3 is a schematic view of a third embodiment of a cable duct monitoring method according to an embodiment of the present invention;
FIG. 4 is a schematic view of an embodiment of a cable duct monitoring device according to the present invention;
FIG. 5 is a schematic view of another embodiment of a cable duct monitoring device according to an embodiment of the present invention;
FIG. 6 is a schematic diagram of an embodiment of a cable duct monitoring device in an embodiment of the present invention.
Detailed Description
The embodiment of the invention provides an optical cable pipeline monitoring method, an optical cable pipeline monitoring device, optical cable pipeline monitoring equipment and a storage medium, wherein the method comprises the following steps: the method comprises the following steps: transmitting pulse light signals to a target optical cable laid in an optical cable pipeline, collecting backward scattering light reflected by the pulse light signals in the target optical cable after the pulse light signals are influenced by a plurality of environmental state quantities in the optical cable pipeline, carrying out optical branching processing on the backward scattering light according to a preset scattering mode to obtain multiple paths of scattering light, transmitting the multiple paths of scattering light to corresponding environment monitoring units, demodulating the multiple paths of scattering light according to corresponding demodulation types to obtain monitoring signals representing the environmental state quantities, and sending the monitoring signals to a pipeline management platform; and calculating a plurality of characteristic parameters of a preset environment state quantity combination and the early warning value of each characteristic parameter to generate monitoring early warning information of the optical cable pipeline. This application has improved the monitoring efficiency to current optical fiber pipeline system through the monitoring to multiple monitoring parameter simultaneously.
The terms "first," "second," "third," "fourth," and the like in the description and in the claims, as well as in the drawings, if any, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It will be appreciated that the data so used may be interchanged under appropriate circumstances such that the embodiments described herein may be practiced otherwise than as specifically illustrated or described herein. Furthermore, the terms "comprises," "comprising," or "having," and any variations thereof, are intended to cover non-exclusive inclusions, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
For convenience of understanding, a specific flow of an embodiment of the present invention is described below, and referring to fig. 1, a first embodiment of a method for monitoring a fiber optic cable duct according to an embodiment of the present invention includes:
101. transmitting pulse light signals to a target optical cable laid in an optical cable pipeline through an integrated monitoring host, collecting backward scattering light reflected by the pulse light signals in the target optical cable after being influenced by a plurality of environmental state quantities in the optical cable pipeline, carrying out optical branching processing on the backward scattering light according to a preset scattering mode to obtain multiple paths of scattering light, and transmitting the multiple paths of scattering light to corresponding environment monitoring units;
the embodiment of the application can acquire and process related data based on an artificial intelligence technology. Among them, artificial Intelligence (AI) is a theory, method, technique and application system that simulates, extends and expands human Intelligence using a digital computer or a machine controlled by a digital computer, senses the environment, acquires knowledge and uses the knowledge to obtain the best result.
The artificial intelligence base technologies generally include technologies such as sensors, dedicated artificial intelligence chips, cloud computing, distributed storage, big data processing technologies, operation/interaction systems, mechatronics, and the like. The artificial intelligence software technology mainly comprises a computer vision technology, a robot technology, a biological recognition technology, a voice processing technology, a natural language processing technology, machine learning/deep learning and the like.
In the embodiment, the application is applied to an optical cable pipeline monitoring system, wherein the optical cable pipeline refers to an operation pipeline in which a single optical fiber or a corresponding number of optical cables are laid in a corresponding power pipeline, a municipal pipe gallery and a communication groove box; the optical cable pipeline monitoring system comprises an integrated monitoring host and a pipeline management platform, wherein the integrated monitoring host is used for monitoring the running state of an optical cable pipeline, and a plurality of environment monitoring units of different demodulation types are deployed on the integrated monitoring host; the integrated monitoring host is composed of a relevant pulse transmitting unit, a plurality of environment monitoring units with different demodulation types and corresponding signal shunting units, can generate corresponding detection pulse optical signals, and carries out optical shunting on the scattered and returned pulse optical signals and demodulation processing on the signals corresponding to the environment state quantity, so that the corresponding optical cable detection demodulation signals are transmitted to the integrated monitoring host of the pipeline management platform; the environment monitoring unit demodulates corresponding light scattering signals of different environment state quantities corresponding to the operation environment of the pipeline, demodulates the scattering light signals of a radio frequency band into low-frequency signals of a corresponding baseband frequency band, extracts the corresponding state quantities in the signals subsequently and monitors the operation state of the pipeline optical cable; the scattering method herein refers to a phenomenon that when light is transmitted through an optical cable, a part of the transmitted light is scattered due to the influence of the properties of the optical cable itself (the purity of quartz stone constituting the optical fiber, the refractive index of the optical fiber, etc.), and the scattering method includes rayleigh scattering, raman scattering, brillouin time domain scattering, etc. Relevant pulse light signals are transmitted to the pipeline optical cable through the integrated monitoring host, and meanwhile scattered light of multiple environmental state quantities in the optical cable is collected. In addition, the environmental state quantity is a state quantity parameter which is determined according to the corresponding type and monitoring property of different pipelines and is required to be detected currently, for example, the state quantity damage condition of temperature and vibration in the environment of the pipeline needs to be monitored by a power pipeline, and state quantity change information such as strain, vibration and the like is required by a communication pipeline.
In practical application, an integrated monitoring host is used for performing signal coupling on laser signals for monitoring of a preset optical cable pipeline to obtain two paths of continuous laser signals and local oscillator optical signals with preset proportions; further, pulse modulation and power amplification are carried out on the continuous laser signals to obtain pulse light signals monitored by the optical cable pipeline, the pulse light signals are transmitted to a target optical cable laid in the optical cable pipeline, a circulator in the integrated monitoring host is used for collecting backward scattering light reflected by the pulse light signals in the target optical cable after being influenced by a plurality of environment state quantities in the optical cable pipeline, a plurality of reference state quantities of the integrated monitoring host for pipeline monitoring are further determined, and each reference state quantity is divided into a first state quantity set and a second state quantity set; based on a first state quantity set, wherein the first state quantity set comprises transmission loss, first vibration and temperature, according to a preset scattering mode, carrying out optical interference and filtering on backward scattering light by using a local oscillator optical signal to obtain three paths of scattering light; and based on a second state quantity set, wherein the second state quantity set comprises second vibration and temperature/strain, according to a preset scattering mode, performing optical interference and frequency mixing on the backward scattering light by using a local oscillator optical signal to obtain two paths of scattering light, and transmitting each path of scattering light to a corresponding environment monitoring unit for demodulation processing.
102. Demodulating each path of scattered light at each environment monitoring unit according to the corresponding demodulation type to obtain a monitoring signal representing each environment state quantity, and sending the monitoring signal to a pipeline management platform;
in this embodiment, the demodulation type here refers to a method for determining a scattered light demodulation processing mode corresponding to a state quantity according to an environmental state quantity corresponding to pipeline monitoring and a corresponding scattering mode, for example, a scattering signal with a transmission loss parameter being rayleigh scattering, and performing demodulation processing by using an OTDR (optical time-domain reflectometer) technique; the vibration parameter is a scattering signal of Rayleigh scattering, and demodulation processing is carried out by using a phi Optical Time Domain Reflectometer (phase sensitive Optical Time Domain Reflectometer) technology; the Temperature parameter is a scattered signal of Raman scattering, and demodulation processing is carried out by using a DTS (Distributed Temperature Sensing) technology; the strain parameter is a scattering signal of Brillouin scattering, and demodulation processing is performed by using a BOTDR (Brillouin optical time domain reflector) technology. By demodulating various environmental quantities, the transmission parameter data corresponding to the pipeline optical cables with various environmental quantities can be obtained through detection in sequence.
In practical application, when the monitoring signal comprises a transmission loss signal, a first vibration signal and a temperature signal of the optical cable pipeline, performing photoelectric conversion and phase-locked demodulation on scattered light of a transmission loss optical path of the optical cable pipeline through a transmission loss monitoring unit to obtain an orthogonal component signal and an in-phase component signal, and performing signal compensation on the orthogonal component signal and the in-phase component signal to obtain a transmission loss signal of the optical cable pipeline; performing photoelectric conversion on the final scattered light of the first vibration light path through a first vibration monitoring unit to obtain a high-frequency electric signal, and performing Fourier change and analog-to-digital conversion on the high-frequency electric signal to obtain a first vibration signal; and performing photoelectric conversion and analog-to-digital conversion on the final scattered light of the optical cable pipeline temperature optical path through the temperature monitoring unit to obtain an initial digital signal, and performing high-frequency phase locking on the initial digital signal to obtain a temperature signal of the optical cable pipeline. In addition, when the monitoring signal includes a second vibration signal and a strain signal (wherein the strain signal may be a temperature signal), the scattered light of the second vibration optical path is subjected to in-phase quadrature demodulation by the second vibration monitoring unit to obtain two paths of quadrature phase difference signals, and the two paths of quadrature phase difference signals are subjected to photoelectric detection to obtain a second vibration signal; and performing photoelectric conversion and analog-to-digital conversion on the final scattered light to be demodulated of the optical cable pipeline strain optical path through the strain monitoring unit, and performing Lorentz fitting on the signals subjected to the analog-to-digital conversion to obtain the strain signals of the optical cable pipeline. And then the monitoring signals demodulated by the environmental state quantities are sent to a pipeline management platform.
103. And calculating a plurality of characteristic parameters corresponding to the preset environment state quantity combination in the monitoring signal through a pipeline management platform, respectively calculating the early warning value of each characteristic parameter based on the laying characteristic attribute of the optical cable pipeline, and generating the monitoring early warning information of the optical cable pipeline based on the early warning values.
In this embodiment, the pipeline monitoring platform is configured to perform data analysis on the demodulated monitoring baseband signal, generate corresponding early warning information according to a corresponding pipeline optical cable early warning mechanism based on a data analysis result, and send the early warning information to corresponding early warning receiving equipment. The system comprises a pipeline management platform, an integrated monitoring host, an Ethernet protocol converter, an optical transmission device and an optical transmission network, wherein the pipeline management platform is connected with the integrated monitoring host in a wired or wireless mode, the system is connected through a related communication optical cable, namely, the Ethernet protocol converter is used for carrying out signal transmission processing on a demodulated baseband signal, and the optical transmission device and the optical transmission network are used for transmitting the baseband signal to the pipeline management platform for carrying out data analysis processing; the characteristic parameters refer to transmission influence parameter information such as transmission loss values, loss duration, reflection values, signal jump values, jump points and the like when pulse optical signals are transmitted in an optical cable pipeline; the laying characteristic attribute refers to characteristic information such as laying environment (such as city, suburb, burial depth, laying, burying distribution site and the like) of the pipeline, self-property (such as thickness of the pipeline, use of the pipeline, radius of the pipeline) of the pipeline, historical operating state of the pipeline and the like.
In practical applications, the environment state quantities are combined according to the plurality of environment state quantities (such as three-in-one monitored environment state quantity (transmission loss, vibration and temperature) and two-in-one monitored environment state quantity (vibration and strain/temperature)) and the corresponding demodulated signals, for example, the three-in-one monitored environment state quantity is combined into (transmission loss, vibration, temperature, transmission loss and vibration, transmission loss and temperature, vibration and temperature, transmission loss and vibration and temperature), the two-in-one monitored environment state quantity (vibration, strain/temperature, vibration and strain/temperature) and the like (the state quantities to be monitored can be combined based on the current state quantities to be monitored), and then through the pipeline management platform, feature vectors corresponding to each environment state quantity in the monitored signals, such as a pipeline transmission loss value, a pipeline reflection value, a pipeline transmission jump value, a jump position and the like, are calculated first, and are combined into corresponding feature combined vector information according to each environment state quantity; then based on the risk grade values corresponding to the characteristic combination vectors, carrying out pipeline optical fiber monitoring grade value calculation on the characteristic vector information of each combination, if the pipeline transmission loss value is higher than 100 and is grade 4, the pipeline transmission loss value is 10-100 and is grade 3, the pipeline transmission loss value is 1-10 and is grade 2, and the pipeline transmission loss value is lower than 1, so as to carry out risk evaluation on various single characteristic vectors, and further according to the pipeline transmission influence degree, carrying out risk evaluation on various combined characteristic parameters according to the influence weight corresponding to the pipeline transmission influence degree, such as vibration and temperature in a construction building area, taking the vibration as main influence state quantities, so as to calculate the risk evaluation value of the vibration and the temperature; further, various characteristic attributes of the current pipeline are determined based on the laying characteristic attributes of the optical cable pipeline, such as the power pipeline (mainly responsible for monitoring the power transmission state), the urban laying pipeline, the pipeline radius, the overall distribution information of the power pipeline and the like, the calculation weight values of the corresponding characteristic attributes are matched, the early warning values of all characteristic parameters are respectively calculated, for example, based on the risk assessment values of the vibration and the temperature, the final early warning value is calculated after the corresponding risk assessment values are matched with the calculation weight values of the power pipeline, and the vibration location and the temperature variation value are combined with the pipeline burying distribution location by combining the pipeline burying distribution location, the corresponding vibration point, the temperature value and the transmission loss value, so that a pipeline real-time vibration variation graph, a pipeline temperature real-time variation graph, a transmission loss variation graph and the like are generated; and then according to the early warning value, the early warning data value of the historical pipeline transmission state is matched with the early warning data value of the historical pipeline transmission state to obtain the current power pipeline transmission early warning state, and corresponding early warning processing information is generated based on the transmission early warning state, so that the early warning processing information is sent to a corresponding early warning receiving device and early warning personnel, real-time monitoring of the pipeline optical cable transmission state is achieved, and early warning and processing are timely carried out on existing problems.
In the embodiment of the invention, the integrated monitoring host emits pulse light signals to a target optical cable laid in an optical cable pipeline, collects backward scattering light reflected after the pulse light signals in the target optical cable are influenced by a plurality of environmental state quantities in the optical cable pipeline, performs optical branching processing on the backward scattering light according to a preset scattering mode to obtain multiple paths of scattering light, and transmits the multiple paths of scattering light to corresponding environment monitoring units; demodulating each path of scattered light at each environment monitoring unit according to the corresponding demodulation type to obtain a monitoring signal representing each environment state quantity, and sending the monitoring signal to a pipeline management platform; and calculating a plurality of characteristic parameters corresponding to the preset environment state quantity combination in the monitoring signals through a pipeline management platform, respectively calculating the early warning value of each characteristic parameter based on the laying characteristic attribute of the optical cable pipeline, and generating monitoring early warning information of the optical cable pipeline based on the early warning value. Compared with the prior art, through transmitting corresponding pulse optical signals to the target optical cable, the integrated monitoring host is used for collecting the backscattered light affected by various environmental state quantities, then the backscattered light is subjected to optical branching to obtain scattered light corresponding to a scattering mode, then the scattered light corresponding to each environmental monitoring unit is subjected to optical demodulation, and the demodulated signals are subjected to optical cable pipeline monitoring analysis to obtain the running state early warning information of the current pipeline optical cable. The monitoring of multiple environmental state quantities in the pipeline optical cable is realized by using one optical cable, so that the monitoring efficiency of the conventional pipeline optical cable system is improved.
Referring to fig. 2, a second embodiment of the method for monitoring a cable duct according to the embodiment of the present invention includes:
201. performing signal coupling on a laser signal monitored by a preset optical cable pipeline through an integrated monitoring host to obtain two paths of continuous laser signals and local oscillator optical signals with preset proportions;
in this embodiment, the laser signal refers to an original baseband transmission signal of the integrated monitoring host; the signal coupling here means that the optical coupler is used to couple the signals corresponding to the pipeline monitoring to obtain multiple required signals.
In practical application, a narrow-linewidth light source in an integrated monitoring host generates a laser signal for monitoring a preset optical cable pipeline, and then a 1.
202. Performing pulse modulation and power amplification on the continuous laser signal to obtain a pulse light signal monitored by the optical cable pipeline, and transmitting the pulse light signal to a target optical cable laid in the optical cable pipeline;
in this embodiment, the pulse modulation is to modulate a signal in a baseband frequency band to a high-frequency signal in a transmission frequency band, and the power amplification is to amplify the power of the modulated signal to a signal transmission power range.
In practical application, the input continuous laser signals are modulated into pulse light signals, the frequency of the light signals is increased by 200MHz, the modulated pulse light signals are subjected to power amplification and output to a transmitting-receiving combiner, and the pulse light signals subjected to power amplification are transmitted to a target optical cable by using the transmitting-receiving combiner, so that the backward scattering light reflected after the pulse light signals in the target optical cable are influenced by a plurality of environmental state quantities in an optical cable pipeline is collected.
203. Determining a plurality of reference state quantities monitored by the integrated monitoring host, and dividing each reference state quantity into a first state quantity set and a second state quantity set;
in the present embodiment, the first state quantity set here includes transmission loss, first vibration, and temperature; the second set of state quantities here includes a second vibration and temperature/strain. In addition, different environmental state quantities can be combined according to actual monitoring requirements, so that monitoring and early warning of various environmental state quantities by using one integrated monitoring host can be realized.
In practical application, a first state quantity set of three-in-one monitoring and a second state quantity set of two-in-one monitoring are generated by determining the environmental state quantity of the optical cable pipeline monitoring carried out by the current integrated monitoring host.
204. Selecting a preset first scattering mode based on the first state quantity set, and carrying out optical interference and filtering on the backward scattering light by using a local oscillator light signal to obtain three paths of scattering light;
in this embodiment, based on the transmission loss state, the first vibration state, and the temperature state, the backward scattering light is optically coupled by a shunt according to a preset scattering mode, and a path of scattering light of the transmission loss optical path, a path of scattering light of the temperature optical path, and a path of scattering light of the first vibration optical path are correspondingly obtained; then, optical signal coupling is carried out on scattered light of the temperature light path and scattered light of the first vibration light path respectively by adopting local oscillation optical signals, and first coupling scattered light and second coupling scattered light are correspondingly obtained; and selecting the scattered light of the preset high frequency band from the first coupling scattered light after optical filtering as the final scattered light of the temperature light path, and selecting the scattered light of the preset low frequency band from the second coupling scattered light after optical filtering as the final scattered light of the first vibration light path, thereby finally obtaining three paths of scattered light signals.
205. Selecting a preset second scattering mode based on the second state quantity set, and carrying out optical interference and frequency mixing on the backward scattering light by using a local oscillator optical signal to obtain two paths of scattering light;
in this embodiment, based on the second vibration state and the strain state, the back scattering light is optically coupled in a shunt manner according to a preset scattering mode, so that a path of scattering light of the second vibration and a path of scattering light of the strain light path are correspondingly obtained; and further, the local oscillator optical signals are adopted to perform optical frequency mixing on the scattered light of the strain optical path to obtain the final scattered light of the strain optical path, and finally three paths of scattered light signals are obtained.
206. Demodulating each path of scattered light at each environment monitoring unit according to the corresponding demodulation type to obtain a monitoring signal representing each environment state quantity, and sending the monitoring signal to a pipeline management platform;
207. and calculating a plurality of characteristic parameters corresponding to the preset environment state quantity combination in the monitoring signals through a pipeline management platform, respectively calculating the early warning value of each characteristic parameter based on the laying characteristic attribute of the optical cable pipeline, and generating monitoring early warning information of the optical cable pipeline based on the early warning value.
In the embodiment of the invention, the integrated monitoring host is used for carrying out signal coupling on the laser signals monitored by the preset optical cable pipeline to obtain two paths of continuous laser signals and local oscillator optical signals with preset proportion; carrying out pulse modulation and power amplification on the continuous laser signal to obtain a pulse light signal monitored by the optical cable pipeline, and transmitting the pulse light signal to a target optical cable laid in the optical cable pipeline; determining a plurality of reference state quantities monitored by the integrated monitoring host, and dividing each reference state quantity into a first state quantity set and a second state quantity set; selecting a preset first scattering mode based on the first state quantity set, and carrying out optical interference and filtering on the backward scattering light by using a local oscillator light signal to obtain three paths of scattering light; and selecting a preset second scattering mode based on the second state quantity set, and performing optical interference and frequency mixing on the backward scattering light by using the local oscillator optical signal to obtain two paths of scattering light. Compared with the prior art, the integrated monitoring host transmits the corresponding pulse light signals to the target optical cable, and then after the corresponding pulse light signals are collected, the pulse light signals are subjected to shunting processing according to the environment state set to be collected, so that signal analysis of different state quantities can be realized subsequently.
Referring to fig. 3, a third embodiment of the method for monitoring an optical cable pipeline according to the embodiment of the present invention includes:
301. transmitting pulse light signals to a target optical cable laid in an optical cable pipeline through an integrated monitoring host, collecting backward scattering light reflected by the pulse light signals in the target optical cable after being influenced by a plurality of environmental state quantities in the optical cable pipeline, carrying out optical branching processing on the backward scattering light according to a preset scattering mode to obtain multiple paths of scattering light, and transmitting the multiple paths of scattering light to corresponding environment monitoring units;
302. performing photoelectric conversion and phase-locked demodulation on scattered light of a transmission loss light path through a transmission loss monitoring unit to obtain an orthogonal component signal and an in-phase component signal, and performing signal compensation on the orthogonal component signal and the in-phase component signal to obtain a transmission loss signal;
in this embodiment, when the environmental state quantity corresponding to the shunt signal is the transmission loss parameter, the transmission loss monitoring unit performs photoelectric conversion and frequency mixing on the scattered light of the transmission loss optical path to obtain an electrical signal to be demodulated with high frequency, and further performs phase-locked processing on the electrical signal to be demodulated.
303. Performing photoelectric conversion on the final scattered light of the first vibration light path through a first vibration monitoring unit to obtain a high-frequency electric signal, and performing Fourier transform and analog-to-digital conversion on the high-frequency electric signal to obtain a first vibration signal;
in this embodiment, when the environmental state quantity corresponding to the shunt signal is the first vibration parameter, the first vibration monitoring unit performs photoelectric conversion and frequency mixing on the scattered light of the first vibration optical path to obtain a high-frequency electrical signal, and then performs fourier transform processing on the polarity of the high-frequency electrical signal to obtain an electrical signal with a continuous time domain, and performs analog-to-digital sampling on the electrical signal, so as to obtain a first vibration signal in the pipeline monitoring environment.
304. Performing photoelectric conversion and analog-to-digital conversion on the final scattered light of the temperature light path through a temperature monitoring unit to obtain an initial digital signal, and performing high-frequency phase locking on the initial digital signal to obtain a temperature signal;
in this embodiment, when the environmental state quantity corresponding to the shunt signal is a temperature parameter, the temperature monitoring unit performs photoelectric conversion and analog-to-digital conversion on the scattered light of the temperature light path to obtain an initial digital signal of a high frequency band, and further performs high-frequency phase-locking processing on the initial digital signal, and performs phase-locking processing on the obtained initial digital signal according to the intensity signal, so as to obtain a temperature signal with a signal intensity change in the pipeline monitoring environment.
305. Carrying out in-phase quadrature demodulation on scattered light of a second vibration light path through a second vibration monitoring unit to obtain two paths of quadrature phase difference signals, and carrying out photoelectric detection on the two paths of quadrature phase difference signals to obtain a second vibration signal;
in this embodiment, when the environmental state quantity corresponding to the shunt signal is the second vibration, the second vibration monitoring unit performs photoelectric conversion and frequency mixing on the scattered light of the second vibration optical path to obtain an electrical signal to be demodulated corresponding to a high frequency band, and further performs quadrature in-phase demodulation on the electrical signal to be demodulated to obtain two quadrature demodulation signals, and further calculates the subband phase and the imbalance gain of the in-phase component signal and the quadrature component signal in the two quadrature demodulation signals, and further uses the compensation parameters corresponding to the subband phase and the imbalance gain of the compensation algorithm, so as to perform signal compensation on the high frequency electrical signal by using the compensation parameters to obtain the second vibration signal.
306. Performing photoelectric conversion and analog-to-digital conversion on the final scattered light to be demodulated of the strain light path through a strain monitoring unit, and performing Lorentz fitting on a signal subjected to the analog-to-digital conversion to obtain a strain signal;
in this embodiment, when the environmental state quantity corresponding to the shunt signal is a strain parameter (where the strain parameter may also be a temperature parameter), photoelectric conversion and analog-to-digital conversion are performed on the to-be-demodulated scattered light of the temperature/strain optical path by the temperature/strain monitoring unit to obtain a digital high-frequency electrical signal, and then lorentz fitting is performed on the digital high-frequency electrical signal, that is, a single-parameter or multi-parameter lorentz function is fitted to the digital high-frequency electrical signal, so that a strain signal corresponding to the center frequency of the brillouin scattering signal in the pipeline monitoring environment can be obtained.
307. And calculating a plurality of characteristic parameters corresponding to the preset environment state quantity combination in the monitoring signal through a pipeline management platform, respectively calculating the early warning value of each characteristic parameter based on the laying characteristic attribute of the optical cable pipeline, and generating the monitoring early warning information of the optical cable pipeline based on the early warning values.
In the embodiment of the invention, each path of scattered light is demodulated in each environment monitoring unit according to the corresponding demodulation type to obtain the monitoring signal representing each environment state quantity, and the monitoring signal is sent to the pipeline management platform. Compared with the prior art, the method and the device have the advantages that the corresponding scattering signals are demodulated and processed to obtain the baseband demodulation signals of the required state quantities by utilizing the environment monitoring units corresponding to the environment state quantities, so that the subsequent analysis and processing of parameter data of different state quantities are realized, and various parameters and early warning information of the running state of the pipeline optical cable are obtained at the same time.
With reference to fig. 4, the method for monitoring an optical cable pipeline according to an embodiment of the present invention is described above, and an optical cable pipeline monitoring device according to an embodiment of the present invention is described below, where an embodiment of the apparatus for monitoring an optical cable pipeline according to an embodiment of the present invention includes:
the signal shunting module 401 is configured to transmit a pulsed light signal to a target optical cable laid in an optical cable pipeline through the integrated monitoring host, collect backscattered light reflected by the pulsed light signal in the target optical cable after being affected by a plurality of environmental state quantities in the optical cable pipeline, perform optical shunting processing on the backscattered light according to a preset scattering mode to obtain multiple paths of scattered light, and transmit the multiple paths of scattered light to corresponding environment monitoring units;
the signal demodulation module 402 is configured to demodulate each path of scattered light in each environment monitoring unit according to a corresponding demodulation type to obtain a monitoring signal representing each environment state quantity, and send the monitoring signal to the pipeline management platform;
the monitoring analysis module 403 is configured to calculate, through the pipeline management platform, a plurality of characteristic parameters corresponding to a preset combination of environmental state quantities in the monitoring signal, calculate an early warning value of each of the characteristic parameters based on a laying characteristic attribute of the optical cable pipeline, and generate monitoring early warning information of the optical cable pipeline based on the early warning value.
In the embodiment of the invention, the integrated monitoring host emits pulse light signals to a target optical cable laid in an optical cable pipeline, collects backward scattering light reflected after the pulse light signals in the target optical cable are influenced by a plurality of environmental state quantities in the optical cable pipeline, performs optical branching processing on the backward scattering light according to a preset scattering mode to obtain multiple paths of scattering light, and transmits the multiple paths of scattering light to corresponding environment monitoring units; demodulating each path of scattered light at each environment monitoring unit according to the corresponding demodulation type to obtain a monitoring signal representing each environment state quantity, and sending the monitoring signal to a pipeline management platform; and calculating a plurality of characteristic parameters corresponding to the preset environment state quantity combination in the monitoring signal through a pipeline management platform, respectively calculating the early warning value of each characteristic parameter based on the laying characteristic attribute of the optical cable pipeline, and generating the monitoring early warning information of the optical cable pipeline based on the early warning values. Compared with the prior art, through transmitting corresponding pulse optical signals to the target optical cable, the integrated monitoring host is used for collecting the backscattered light affected by various environmental state quantities, then the backscattered light is subjected to optical branching to obtain scattered light corresponding to a scattering mode, then the scattered light corresponding to each environmental monitoring unit is subjected to optical demodulation, and the demodulated signals are subjected to optical cable pipeline monitoring analysis to obtain the running state early warning information of the current pipeline optical cable. The simultaneous monitoring of various environmental state quantities in the pipeline optical cable is realized by utilizing one optical cable, and the monitoring efficiency of the existing pipeline optical cable system is improved.
Referring to fig. 5, another embodiment of the optical cable pipeline monitoring apparatus according to the embodiment of the present invention includes:
the signal shunting module 401 is configured to transmit a pulsed light signal to a target optical cable laid in an optical cable pipeline through the integrated monitoring host, collect backscattered light reflected by the pulsed light signal in the target optical cable after being affected by a plurality of environmental state quantities in the optical cable pipeline, perform optical shunting processing on the backscattered light according to a preset scattering mode to obtain multiple paths of scattered light, and transmit the multiple paths of scattered light to corresponding environment monitoring units;
the signal demodulation module 402 is configured to demodulate each path of scattered light in each environment monitoring unit according to a corresponding demodulation type to obtain a monitoring signal representing each environment state quantity, and send the monitoring signal to the pipeline management platform;
and the monitoring analysis module 403 is configured to calculate, through the pipeline management platform, a plurality of characteristic parameters corresponding to a preset environment state quantity combination in the monitoring signal, calculate an early warning value of each of the characteristic parameters based on the laying characteristic attribute of the optical cable pipeline, and generate monitoring early warning information of the optical cable pipeline based on the early warning values.
Further, the signal splitting module 401 includes:
the laser coupling unit 4011 is configured to perform signal coupling on a laser signal monitored by a preset optical cable pipeline through the integrated monitoring host to obtain two paths of continuous laser signals and local oscillator optical signals in a preset ratio;
and the pulse modulation unit 4012 is configured to perform pulse modulation and power amplification on the continuous laser signal to obtain a pulsed light signal monitored by the optical cable pipeline, and transmit the pulsed light signal to a target optical cable laid in the optical cable pipeline.
Further, the signal splitting module 401 includes:
a state determination unit 4013, configured to determine a plurality of reference state quantities monitored by the integrated monitoring host, and divide each of the reference state quantities into a first state quantity set and a second state quantity set;
the first branch unit 4014 is configured to select a preset first scattering mode based on the first state quantity set, and perform optical interference and filtering on the backscattered light by using the local oscillator optical signal to obtain three paths of scattered light;
and the second branching unit 4015 is configured to select a preset second scattering mode based on the second state quantity set, and perform optical interference and frequency mixing on the backscattered light by using the local oscillator optical signal to obtain two paths of scattered light.
Further, the first shunting unit 4014 is configured to:
based on the transmission loss state, the first vibration state and the temperature state, performing optical shunt coupling on the back scattering light according to a preset scattering mode to correspondingly obtain a path of scattering light of the transmission loss optical path, a path of scattering light of the temperature optical path and a path of scattering light of the first vibration optical path; respectively carrying out optical signal coupling on scattered light of the temperature optical path and scattered light of the first vibration optical path by adopting the local oscillator optical signal to correspondingly obtain first coupled scattered light and second coupled scattered light; and performing optical filtering on the first coupling scattered light and the second coupling scattered light, and selecting scattered light of a preset high frequency band from the first coupling scattered light after the optical filtering as final scattered light of the temperature light path, and selecting scattered light of a preset low frequency band from the second coupling scattered light after the optical filtering as final scattered light of the first vibration light path.
Further, the second shunting unit 4015 is configured to:
based on the second vibration state and the strain state, performing optical shunt coupling on the backward scattering light according to a preset scattering mode to correspondingly obtain a path of scattering light of the second vibration and a path of scattering light of the strain light path; and carrying out optical frequency mixing on the scattered light of the strain optical path by adopting the local oscillator optical signal to obtain the final scattered light of the strain optical path.
Further, the signal demodulation module 402 includes:
the first demodulation unit 4021 is configured to perform photoelectric conversion and phase-locked demodulation on the scattered light of the transmission loss optical path through the transmission loss monitoring unit to obtain an orthogonal component signal and an in-phase component signal, and perform signal compensation on the orthogonal component signal and the in-phase component signal to obtain a transmission loss signal;
the second demodulation unit 4022 is configured to perform photoelectric conversion on the finally scattered light of the first vibration optical path through the first vibration monitoring unit to obtain a high-frequency electrical signal, and perform fourier transform and analog-to-digital conversion on the high-frequency electrical signal to obtain a first vibration signal;
the third demodulation unit 4023 is configured to perform photoelectric conversion and analog-to-digital conversion on the finally scattered light of the temperature light path through the temperature monitoring unit to obtain an initial digital signal, and perform high-frequency phase locking on the initial digital signal to obtain a temperature signal.
Further, the signal demodulating module 402 further includes:
the fourth demodulation unit 4024 is configured to perform in-phase and quadrature demodulation on the scattered light of the second vibration light path through the second vibration monitoring unit to obtain two paths of quadrature phase difference signals, and perform photoelectric detection on the two paths of quadrature phase difference signals to obtain a second vibration signal;
the fifth demodulating unit 4025 is configured to perform photoelectric conversion and analog-to-digital conversion on the finally to-be-demodulated scattered light in the strain light path through the strain monitoring unit, and perform lorentz fitting on the analog-to-digital converted signal to obtain a strain signal.
In the embodiment of the invention, the integrated monitoring host emits pulse light signals to a target optical cable laid in an optical cable pipeline, collects backward scattering light reflected after the pulse light signals in the target optical cable are influenced by a plurality of environmental state quantities in the optical cable pipeline, performs optical branching processing on the backward scattering light according to a preset scattering mode to obtain multiple paths of scattering light, and transmits the multiple paths of scattering light to corresponding environment monitoring units; demodulating each path of scattered light at each environment monitoring unit according to the corresponding demodulation type to obtain a monitoring signal representing each environment state quantity, and sending the monitoring signal to a pipeline management platform; and calculating a plurality of characteristic parameters corresponding to the preset environment state quantity combination in the monitoring signal through a pipeline management platform, respectively calculating the early warning value of each characteristic parameter based on the laying characteristic attribute of the optical cable pipeline, and generating the monitoring early warning information of the optical cable pipeline based on the early warning values. Compared with the prior art, through transmitting corresponding pulse optical signals to the target optical cable, the integrated monitoring host is used for collecting the backscattered light affected by various environmental state quantities, then the backscattered light is subjected to optical branching to obtain scattered light corresponding to a scattering mode, then the scattered light corresponding to each environmental monitoring unit is subjected to optical demodulation, and the demodulated signals are subjected to optical cable pipeline monitoring analysis to obtain the running state early warning information of the current pipeline optical cable. The simultaneous monitoring of various environmental state quantities in the pipeline optical cable is realized by utilizing one optical cable, and the monitoring efficiency of the existing pipeline optical cable system is improved.
Fig. 4 and 5 describe the optical cable duct monitoring device in the embodiment of the present invention in detail from the perspective of the modular functional entity, and the optical cable duct monitoring device in the embodiment of the present invention is described in detail from the perspective of hardware processing.
Fig. 6 is a schematic structural diagram of a cable duct monitoring device according to an embodiment of the present invention, where the cable duct monitoring device 600 may generate relatively large differences due to different configurations or performances, and may include one or more processors (CPUs) 610 (e.g., one or more processors) and a memory 620, and one or more storage media 630 (e.g., one or more mass storage devices) storing applications 633 or data 632. Memory 620 and storage medium 630 may be, among other things, transient or persistent storage. The program stored in the storage medium 630 may include one or more modules (not shown), each of which may include a series of instruction operations for the cable duct monitoring apparatus 600. Still further, the processor 610 may be configured to communicate with the storage medium 630 to execute a series of instruction operations in the storage medium 630 on the cable duct monitoring device 600.
The fiber optic cable duct monitoring apparatus 600 may also include one or more power supplies 640, one or more wired or wireless network interfaces 650, one or more input-output interfaces 660, and/or one or more operating systems 631, such as Windows Server, mac OS X, unix, linux, freeBSD, and the like. Those skilled in the art will appreciate that the cable duct monitoring device configuration shown in FIG. 6 does not constitute a limitation of the cable duct monitoring device, and may include more or fewer components than shown, or some components may be combined, or a different arrangement of components.
The present invention further provides an optical cable pipeline monitoring apparatus, where the computer apparatus includes a memory and a processor, where the memory stores computer readable instructions, and when the computer readable instructions are executed by the processor, the processor executes the steps of the optical cable pipeline monitoring method in the foregoing embodiments.
The present invention also provides a computer readable storage medium, which may be a non-volatile computer readable storage medium, and which may also be a volatile computer readable storage medium, having stored therein instructions, which, when run on a computer, cause the computer to perform the steps of the cable duct monitoring method.
It can be clearly understood by those skilled in the art that, for convenience and simplicity of description, the specific working processes of the above-described systems, apparatuses and units may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.
The integrated unit, if implemented in the form of a software functional unit and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present invention, which is substantially or partly contributed by the prior art, or all or part of the technical solution may be embodied in a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to perform all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a portable hard disk, a read-only memory (ROM), a Random Access Memory (RAM), a magnetic disk, an optical disk, or other various media capable of storing program codes.
The application is operational with numerous general purpose or special purpose computing system environments or configurations. For example: personal computers, server computers, hand-held or portable devices, tablet-type devices, multiprocessor systems, microprocessor-based systems, set top boxes, programmable consumer electronics, network PCs, minicomputers, mainframe computers, distributed computing environments that include any of the above systems or devices, and the like. The application may be described in the general context of computer-executable instructions, such as program modules, being executed by a computer. Generally, program modules include routines, programs, objects, components, data structures, etc. that perform particular tasks or implement particular abstract data types. The application may also be practiced in distributed computing environments where tasks are performed by remote processing devices that are linked through a communications network. In a distributed computing environment, program modules may be located in both local and remote computer storage media including memory storage devices.
The above-mentioned embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (10)
1. An optical cable pipeline monitoring method is applied to an optical cable pipeline monitoring system, and is characterized in that the optical cable pipeline monitoring system comprises an integrated monitoring host and a pipeline management platform in communication connection with the monitoring host, the integrated monitoring host is provided with a plurality of environment monitoring units of different demodulation types, and the optical cable pipeline monitoring method comprises the following steps:
transmitting pulse light signals to a target optical cable laid in an optical cable pipeline through the integrated monitoring host, collecting backscattered light reflected by the pulse light signals in the target optical cable after being influenced by a plurality of environmental state quantities in the optical cable pipeline, performing optical branching processing on the backscattered light according to a preset scattering mode to obtain multiple paths of scattered light, and transmitting the multiple paths of scattered light to corresponding environment monitoring units;
demodulating each path of scattered light at each environment monitoring unit according to the corresponding demodulation type to obtain a monitoring signal representing each environment state quantity, and sending the monitoring signal to the pipeline management platform;
and calculating a plurality of characteristic parameters corresponding to a preset environment state quantity combination in the monitoring signals through the pipeline management platform, respectively calculating early warning values of the characteristic parameters based on the laying characteristic attributes of the optical cable pipeline, and generating monitoring early warning information of the optical cable pipeline based on the early warning values.
2. The method for monitoring the optical cable pipeline according to claim 1, wherein the transmitting the pulsed optical signal into the target optical cable laid in the optical cable pipeline by the integrated monitoring host comprises:
performing signal coupling on a laser signal monitored by a preset optical cable pipeline through the integrated monitoring host to obtain two paths of continuous laser signals and local oscillator optical signals in a preset proportion;
and carrying out pulse modulation and power amplification on the continuous laser signals to obtain pulse light signals monitored by the optical cable pipeline, and transmitting the pulse light signals to a target optical cable laid in the optical cable pipeline.
3. The optical cable pipeline monitoring method according to claim 2, wherein the optical branching processing is performed on the backscattered light according to a preset scattering mode to obtain multiple paths of scattered light, and the method comprises:
determining a plurality of reference state quantities monitored by the integrated monitoring host, and dividing each reference state quantity into a first state quantity set and a second state quantity set;
selecting a preset first scattering mode based on the first state quantity set, and carrying out optical interference and filtering on the backward scattering light by using the local oscillator optical signal to obtain three paths of scattering light;
and selecting a preset second scattering mode based on the second state quantity set, and carrying out optical interference and frequency mixing on the backward scattering light by using the local oscillator optical signal to obtain two paths of scattering light.
4. The optical cable pipeline monitoring method according to claim 3, wherein the first state quantity set includes a transmission loss state, a first vibration state and a temperature state, and the selecting a preset first scattering mode based on the first state quantity set, and performing optical interference and filtering on the backscattered light by using the local oscillator optical signal to obtain three paths of scattered light includes:
based on the transmission loss state, the first vibration state and the temperature state, performing optical shunt coupling on the back scattering light according to a preset scattering mode to correspondingly obtain one path of scattering light of the transmission loss optical path, one path of scattering light of the temperature optical path and one path of scattering light of the first vibration optical path;
respectively carrying out optical signal coupling on scattered light of the temperature light path and scattered light of the first vibration light path by adopting a preset local oscillation light signal to correspondingly obtain first coupling scattered light and second coupling scattered light;
and performing optical filtering on the first coupling scattered light and the second coupling scattered light, selecting scattered light of a preset high frequency band from the first coupling scattered light after the optical filtering as final scattered light of the temperature light path, and selecting scattered light of a preset low frequency band from the second coupling scattered light after the optical filtering as final scattered light of the first vibration light path.
5. The optical cable pipeline monitoring method according to claim 4, wherein the environment monitoring unit includes a transmission loss monitoring unit, a first vibration monitoring unit and a temperature monitoring unit, the monitoring signals include a transmission loss signal, a first vibration signal and a temperature signal, and the demodulating, at each environment monitoring unit, each path of scattered light according to a corresponding demodulation type to obtain a monitoring signal representing each environmental state quantity includes:
performing photoelectric conversion and phase-locked demodulation on scattered light of the transmission loss optical path through the transmission loss monitoring unit to obtain an orthogonal component signal and an in-phase component signal, and performing signal compensation on the orthogonal component signal and the in-phase component signal to obtain a transmission loss signal;
performing photoelectric conversion on the final scattered light of the first vibration light path through the first vibration monitoring unit to obtain a high-frequency electric signal, and performing Fourier change and analog-to-digital conversion on the high-frequency electric signal to obtain a first vibration signal;
and performing photoelectric conversion and analog-to-digital conversion on the final scattered light of the temperature light path through the temperature monitoring unit to obtain an initial digital signal, and performing high-frequency phase locking on the initial digital signal to obtain a temperature signal.
6. The optical cable pipeline monitoring method according to claim 3, wherein the second state quantity set includes a second vibration state and a strain state, and the selecting a preset second scattering mode based on the second state quantity set, and performing optical interference and frequency mixing on the backscattered light by using the local oscillator optical signal to obtain two paths of scattered light includes:
based on the second vibration state and the strain state, performing optical shunt coupling on the backward scattering light according to a preset scattering mode to correspondingly obtain a path of scattering light of the second vibration and a path of scattering light of the strain light path;
and carrying out optical frequency mixing on the scattered light of the strain optical path by adopting the local oscillator optical signal to obtain the final scattered light of the strain optical path.
7. The optical cable pipeline monitoring method according to claim 6, wherein the environment monitoring unit includes a second vibration monitoring unit and a strain monitoring unit, the monitoring signals include a second vibration signal and a strain signal, and the demodulating, at each environment monitoring unit, each path of scattered light according to a corresponding demodulation type to obtain a monitoring signal representing each environmental state quantity includes:
carrying out in-phase quadrature demodulation on scattered light of the second vibration light path through the second vibration monitoring unit to obtain two paths of quadrature phase difference signals, and carrying out photoelectric detection on the two paths of quadrature phase difference signals to obtain a second vibration signal;
and performing photoelectric conversion and analog-to-digital conversion on the final scattered light to be demodulated of the strain light path through the strain monitoring unit, and performing Lorentz fitting on the signal subjected to the analog-to-digital conversion to obtain a strain signal.
8. The utility model provides an optical cable pipeline monitoring device, is applied to optical cable pipeline monitoring system, its characterized in that, optical cable pipeline monitoring system include integrated monitoring host computer, and with monitoring host computer communication connection's pipeline management platform, integrated monitoring host computer deploys the environmental monitoring unit that has a plurality of different demodulation types, optical cable pipeline monitoring device includes:
the signal branching module is used for transmitting pulse light signals to a target optical cable laid in an optical cable pipeline through the integrated monitoring host, collecting backward scattering light reflected by the pulse light signals in the target optical cable after being influenced by a plurality of environmental state quantities in the optical cable pipeline, carrying out optical branching processing on the backward scattering light according to a preset scattering mode to obtain multiple paths of scattering light, and transmitting the multiple paths of scattering light to corresponding environment monitoring units;
the signal demodulation module is used for demodulating each path of scattered light at each environment monitoring unit according to the corresponding demodulation type to obtain a monitoring signal representing each environment state quantity, and sending the monitoring signal to the pipeline management platform;
and the monitoring analysis module is used for calculating a plurality of characteristic parameters corresponding to a preset environment state quantity combination in the monitoring signals through the pipeline management platform, respectively calculating early warning values of the characteristic parameters based on the laying characteristic attributes of the optical cable pipeline, and generating monitoring early warning information of the optical cable pipeline based on the early warning values.
9. A fiber optic cable duct monitoring apparatus, comprising: a memory and at least one processor, the memory having instructions stored therein;
the at least one processor invokes the instructions in the memory to cause the cable duct monitoring device to perform the steps of the cable duct monitoring method of any of claims 1-7.
10. A computer readable storage medium having instructions stored thereon, wherein the instructions, when executed by a processor, perform the steps of the cable duct monitoring method according to any of claims 1-7.
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