CN116388859A - Optical fiber state monitoring data acquisition device, method, equipment and medium - Google Patents
Optical fiber state monitoring data acquisition device, method, equipment and medium Download PDFInfo
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- H—ELECTRICITY
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- 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
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- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
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- 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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Abstract
The invention discloses an optical fiber state monitoring data acquisition device, an optical fiber state monitoring data acquisition method, optical fiber state monitoring data acquisition equipment and an optical fiber state monitoring data acquisition medium. The optical fiber frequency acquisition module is used for determining the optical fiber frequency of the optical fiber to be detected based on the phase difference of the conducted optical signals in the optical fiber to be detected, transmitting the optical fiber data and the optical fiber frequency to the embedded board card module, and determining various optical fiber state data corresponding to the optical fiber to be detected according to the received optical fiber data and the optical fiber frequency through the embedded board card module. The multi-module is used for collecting various optical fiber data of the optical fiber to be tested, and carrying out data processing based on the optical fiber data to obtain various optical fiber state data of the optical fiber to be tested, so that the real-time on-line monitoring of multiple parameters is realized, and the multi-module optical fiber monitoring system is simple in structure and low in energy consumption.
Description
Technical Field
The invention relates to the technical field of optical fiber state monitoring data acquisition, in particular to an optical fiber state monitoring data acquisition device, an optical fiber state monitoring data acquisition method, optical fiber state monitoring data acquisition equipment and an optical fiber state monitoring data acquisition medium.
Background
Composite overhead ground wire (OPGW) optical cable plays an important role in the whole power system as an important infrastructure material in China, and plays an important role in increasing power transmission capacity and the like.
In the OPGW optical cable construction process, based on the use requirement, the cable diameter and the cable weight of the OPGW optical cable are required to be continuously increased, the light transmission efficiency of the optical fiber is reduced or even broken due to the influence of factors such as temperature change and strain change of the optical fiber, if a constructor fails to find in time, the whole OPGW optical path is not smooth, and an overhead line site is required to be rearranged and reworked for repair, so that the condition is avoided, and the optical fiber state is required to be monitored in the OPGW optical cable construction process.
However, the existing optical fiber state monitoring data acquisition device can only acquire the temperature change of the optical fiber, or the monitoring parameters are limited to the strain change, other strain effects caused by the analysis stress of the system cannot be realized, and the monitoring parameters are single.
Disclosure of Invention
The invention provides an optical fiber state monitoring data acquisition device, an optical fiber state monitoring data acquisition method, optical fiber state monitoring data acquisition equipment and an optical fiber state monitoring data acquisition medium, which solve the technical problems that the existing optical fiber state monitoring data acquisition device can only acquire the temperature change of an optical fiber, or monitoring parameters are limited to strain change, other strain effects caused by the analysis stress of a system cannot be realized, and the monitoring parameters are single.
The invention provides an optical fiber state monitoring device, which comprises: the embedded board card module is arranged in the shell, and the optical fiber data acquisition module and the optical fiber frequency acquisition module are respectively in communication connection with the embedded board card module;
the optical fiber data acquisition module is used for acquiring various optical fiber data from the optical fiber to be tested based on preset wavelength change data and Brillouin frequency shift and transmitting the various optical fiber data to the embedded board card module;
the optical fiber frequency acquisition module is used for determining the optical fiber frequency of the optical fiber to be detected based on the phase difference of the conducted optical signals in the optical fiber to be detected and transmitting the optical fiber frequency to the embedded board card module;
the embedded board card module is used for determining various optical fiber state data corresponding to the optical fiber to be tested according to the received optical fiber data and the received optical fiber frequency.
Optionally, the optical fiber data acquisition module comprises an optical fiber grating data acquisition module, a distributed optical fiber data acquisition module and an environment and dynamic strain monitoring module;
the optical fiber grating data acquisition module is used for calculating the multiplication value of the wavelength change data and a preset optical fiber threshold value, obtaining a first strain and transmitting the first strain to the embedded board card module;
the distributed optical fiber data acquisition module is used for substituting the power corresponding to the Brillouin frequency shift and the Brillouin frequency shift into a preset temperature strain formula, calculating to obtain distributed temperature and second strain, and transmitting the distributed temperature and second strain to the embedded board card module;
the environment and dynamic strain monitoring module is used for respectively measuring and obtaining third strain and environment dynamic change data through the fiber bragg grating sensor and transmitting the third strain and environment dynamic change data to the embedded board card module.
Optionally, the embedded board card module is specifically configured to:
determining a target strain according to the environmental dynamic change data, the distributed temperature and the optical fiber frequency;
and analyzing and obtaining various optical fiber state data corresponding to the optical fiber to be tested according to the environmental dynamic change data, the distributed temperature, the optical fiber frequency and the target strain.
Optionally, the embedded board card module is specifically further configured to:
respectively comparing the environmental data corresponding to the first strain, the second strain and the third strain with a preset environmental change threshold value in a preliminary way;
taking the strain of the environmental data larger than the environmental change threshold as an intermediate strain;
respectively comparing the intermediate strain with a preset strain threshold value;
and taking the maximum value which is larger than the strain threshold value in the intermediate strain as a target strain.
Optionally, the embedded board card module is specifically further configured to:
performing integral conversion on the target strain through a preset strain conversion system to obtain a corner corresponding to the optical fiber to be tested, and performing integral conversion on the corner to obtain deflection corresponding to the optical fiber to be tested;
calculating the multiplication value of the target strain and a preset elastic modulus through the strain conversion system to obtain the stress corresponding to the optical fiber to be tested;
calculating the ratio of a preset section moment of inertia to a preset axial distance through the strain conversion system and multiplying the ratio by the stress to obtain a bending moment corresponding to the optical fiber to be tested;
respectively carrying out first-order derivation and second-order derivation on the bending moment through the strain conversion system to obtain shearing force and load corresponding to the optical fiber to be tested;
and taking the corner, the deflection, the stress, the bending moment, the shearing force, the load, the distributed temperature, the environment dynamic change data and the optical fiber frequency as optical fiber state data corresponding to the optical fiber to be tested.
Optionally, the embedded board card module is specifically further configured to:
invoking the optical fiber frequency acquisition module to acquire the optical fiber frequency in the optical fiber to be detected in real time;
and converting the optical fiber frequency into optical fiber wavelength and demodulating to obtain the wavelength change data.
Optionally, a signal acquisition processing industrial control module is respectively in communication connection with the optical fiber data acquisition module, the optical fiber frequency acquisition module and the embedded board card module;
the signal acquisition processing industrial control module is used for controlling the working states of the optical fiber data acquisition module and the optical fiber frequency acquisition module through the signal acquisition processing industrial control computer;
and transmitting the optical fiber data and the optical fiber frequency to the embedded board card module.
The invention also provides an optical fiber state monitoring method, which relates to an embedded board card module arranged in a shell, and an optical fiber data acquisition module and an optical fiber frequency acquisition module which are respectively in communication connection with the embedded board card module, wherein the method comprises the following steps:
acquiring various optical fiber data from an optical fiber to be tested based on preset wavelength change data and Brillouin frequency shift through the optical fiber data acquisition module, and transmitting the various optical fiber data to the embedded board card module;
determining the optical fiber frequency of the optical fiber to be detected based on the phase difference of the conducted optical signals in the optical fiber to be detected through the optical fiber frequency acquisition module and transmitting the optical fiber frequency to the embedded board card module;
and determining various optical fiber state data corresponding to the optical fiber to be tested according to the received optical fiber data and the received optical fiber frequency through the embedded board card module.
The invention also provides an electronic device comprising a memory and a processor, wherein the memory stores a computer program, and the computer program when executed by the processor causes the processor to execute the steps for realizing any one of the optical fiber state monitoring methods.
The present invention also provides a computer readable storage medium having stored thereon a computer program which when executed implements a method of monitoring the condition of an optical fibre as described above.
From the above technical scheme, the invention has the following advantages:
according to the invention, the embedded board card module, the optical fiber data acquisition module and the optical fiber frequency acquisition module which are respectively in communication connection with the embedded board card module are arranged in the shell, and the optical fiber data acquisition module is adopted to acquire various optical fiber data from the optical fiber to be tested based on preset wavelength change data and Brillouin frequency shift. The optical fiber frequency acquisition module is used for determining the optical fiber frequency of the optical fiber to be detected based on the phase difference of the conducted optical signals in the optical fiber to be detected, transmitting the optical fiber data and the optical fiber frequency to the embedded board card module, and determining various optical fiber state data corresponding to the optical fiber to be detected according to the received optical fiber data and the optical fiber frequency through the embedded board card module. The optical fiber state monitoring data acquisition device solves the technical problems that the existing optical fiber state monitoring data acquisition device can only acquire the temperature change of an optical fiber, or monitoring parameters are limited to strain change, other strain effects caused by the analysis stress of a system cannot be realized, and the monitoring parameters are single. The multi-module is used for collecting various optical fiber data of the optical fiber to be tested, and further processing is carried out based on the optical fiber data to obtain various optical fiber state data of the optical fiber to be tested, so that the real-time on-line monitoring of multiple parameters is realized, and the multi-module optical fiber monitoring system is simple in structure and low in energy consumption.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions of the prior art, the drawings which are used in the description of the embodiments or the prior art will be briefly described, it being obvious that the drawings in the description below are only some embodiments of the invention, and that other drawings can be obtained from these drawings without inventive faculty for a person skilled in the art.
FIG. 1 is a block diagram of an optical fiber status monitoring device according to an embodiment of the present invention;
FIG. 2 is another block diagram of an optical fiber status monitoring device according to an embodiment of the present invention;
fig. 3 is a flowchart illustrating a method for monitoring an optical fiber status according to a second embodiment of the present invention.
Detailed Description
The embodiment of the invention provides an optical fiber state monitoring data acquisition device, an optical fiber state monitoring data acquisition method, optical fiber state monitoring data acquisition equipment and an optical fiber state monitoring data acquisition medium, which are used for solving the technical problems that the existing optical fiber state monitoring data acquisition device can only acquire the temperature change of an optical fiber, or monitoring parameters are limited to strain change, other strain effects caused by the analysis stress of a system cannot be realized, and the monitoring parameters are single.
In order to make the objects, features and advantages of the present invention more comprehensible, the technical solutions in the embodiments of the present invention are described in detail below with reference to the accompanying drawings, and it is apparent that the embodiments described below are only some embodiments of the present invention, but not all embodiments of the present invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Referring to fig. 1, fig. 1 is a schematic structural diagram of an optical fiber status monitoring device according to an embodiment of the invention.
The invention provides an optical fiber state monitoring device, which comprises: the embedded board card module is arranged in the shell, and the optical fiber data acquisition module and the optical fiber frequency acquisition module are respectively in communication connection with the embedded board card module.
In the embodiment of the invention, the shell comprises a mechanical structure fixedly connected with the embedded board card module, the data acquisition module and the optical fiber frequency acquisition module, for example, the shell can be respectively connected with the modules by adopting a threaded mechanical structure, and the shell is integrally milled by adopting aluminum alloy, so that the power devices of the modules are directly cooled. The embedded board card module, the data acquisition module and the optical fiber frequency acquisition module are arranged inside the shell, the data acquisition module and the optical fiber frequency acquisition module are respectively in communication connection with the embedded board card module, the heat conduction effect is good, the plurality of modules are arranged in the shell in an integrated mode, and various parameters of the optical fiber are monitored in real time by the optical fiber state monitoring device.
The optical fiber data acquisition module is used for acquiring various optical fiber data from the optical fiber to be tested based on preset wavelength change data and Brillouin frequency shift and transmitting the various optical fiber data to the embedded board card module.
In the embodiment of the invention, the preset wavelength change data refers to wavelength change data obtained by calling the optical fiber frequency acquisition module by the embedded board card module to acquire the optical fiber frequency in the optical fiber to be measured in real time, converting the optical fiber frequency into the optical fiber wavelength and demodulating the optical fiber frequency. The optical fiber to be measured is an optical fiber for performing state monitoring by adopting an optical fiber state monitoring device. The frequency and power of the brillouin scattering light are related to the frequency and power change of the incident light, and the scattering angle and the material characteristics of the optical fiber, so that the optical fiber data acquisition module performs data analysis by acquiring the change of the wavelength of light in the optical fiber and the brillouin frequency shift signal, obtains various optical fiber data corresponding to the optical fiber to be detected, and transmits the various optical fiber data to the embedded board card module.
The optical fiber frequency acquisition module is used for determining the optical fiber frequency of the optical fiber to be tested based on the phase difference of the conducted optical signals in the optical fiber to be tested and transmitting the optical fiber frequency to the embedded board card module.
In the embodiment of the invention, the optical fiber frequency acquisition module tests the signal vibration frequency by measuring the phase difference of the conducted optical signals in the optical fiber grating based on the wavelength change and the Brillouin frequency shift signal in the optical fiber to be tested.
The embedded board card module is used for determining various optical fiber state data corresponding to the optical fiber to be tested according to the received optical fiber data and the optical fiber frequency.
In the embodiment of the invention, the embedded board card module can be used for carrying out initialization configuration on each module, controlling power supply, interface and signal control of each module, and can combine built-in programs to control data demodulation and acquisition and control part of peripheral equipment, such as a power supply system and the like. When the embedded board card module receives the optical fiber data and the optical fiber frequency, the optical fiber data can be converted and calculated by combining the optical fiber frequency, so that various optical fiber state data corresponding to the optical fiber to be detected are obtained.
Optionally, the optical fiber data acquisition module comprises an optical fiber grating data acquisition module, a distributed optical fiber data acquisition module and an environment and dynamic strain monitoring module.
In the embodiment of the present invention, the optical fiber data acquisition module and the optical fiber frequency acquisition module may be collectively referred to as a data acquisition module, and the optical fiber data acquisition module includes an optical fiber grating data acquisition module, a distributed optical fiber data acquisition module, and an environmental and dynamic strain monitoring module, so that the data acquisition module includes an optical fiber frequency acquisition module, an optical fiber grating data acquisition module, a distributed optical fiber data acquisition module, and an environmental and dynamic strain monitoring module as shown in fig. 2. The data acquisition module can also be provided with a plurality of interfaces which are respectively connected with the peripheral equipment and the embedded board card module, wherein the peripheral equipment refers to equipment such as a computer, a decoder and the like.
The optical fiber grating data acquisition module is used for calculating the multiplication value of the wavelength change data and a preset optical fiber threshold value, obtaining a first strain and transmitting the first strain to the embedded board card module.
In the embodiment of the invention, when the optical fiber to be measured is deformed in the OPGW optical cable construction process, the wavelength of light transmitted in the optical fiber to be measured can be increased or reduced, the strain change point can be positioned based on wavelength drift, and the strain and temperature change value of the strain change point can be obtained, so that the tension and compression condition of the sensor is judged based on the increase or the decrease of the wavelength through the optical fiber grating data acquisition module, namely, the multiplication value of wavelength change data and a preset optical fiber threshold value is calculated, and the first strain is obtained. Wherein the wavelength variation relationship satisfies:
wherein:
is micro-strain, namely first strain; />
Is the initial wavelength; />
Is the firstiThe next measured wavelength, 1060.64, is a preset fiber threshold.
The distributed optical fiber data acquisition module is used for substituting the power corresponding to the Brillouin frequency shift and the Brillouin frequency shift into a preset temperature strain formula, calculating to obtain distributed temperature and second strain, and transmitting the distributed temperature and second strain to the embedded board card module.
The preset temperature strain formula refers to a relation between the power change of the brillouin frequency shift and the temperature and strain, and the relation is respectively as follows:
in the method, in the process of the invention,
as a result of the second strain,Tis a distributed temperature.
In the embodiment of the invention, since the magnitude of the change of the frequency and power of the brillouin scattered light relative to the frequency and power of the incident light is related to the scattering angle and the material characteristics (refractive index, young's modulus, poisson's ratio, density) of the optical fiber, the above characteristics are mainly affected by temperature and strain. Distributed temperature and strain measurement can be realized by measuring the power of the backward Brillouin scattered light of the pulse light. Therefore, the distributed optical fiber data acquisition module substitutes the acquired power corresponding to the Brillouin frequency shift and the Brillouin frequency shift into a preset temperature strain formula, calculates the distributed temperature and the second strain, and transmits the distributed temperature and the second strain to the embedded board card module.
And the environment and dynamic strain monitoring module is used for respectively measuring and obtaining third strain and environment dynamic change data through the fiber bragg grating sensor and transmitting the third strain and environment dynamic change data to the embedded board card module.
In the embodiment of the invention, the environment and dynamic strain monitoring module comprises an optical fiber grating sensor and an optical fiber sensor, wherein the optical fiber grating sensor is used for measuring the third strain of the optical fiber to be tested, the optical fiber sensor is used for measuring the environment dynamic change data of the optical fiber to be tested, the environment dynamic change data are temperature, vibration and the like, and the measured third strain and environment dynamic change data are transmitted to the embedded board card module for data analysis.
Optionally, the embedded board card module is specifically configured to: determining target strain according to the environmental dynamic change data, the distributed temperature and the optical fiber frequency; and analyzing to obtain various optical fiber state data corresponding to the optical fiber to be tested according to the environmental dynamic change data, the distributed temperature, the optical fiber frequency and the target strain.
In an embodiment of the invention, the target strain is selected from the first strain, the second strain and the third strain based on the environmental dynamics data, the distributed temperature and the fiber frequency. And after determining the target strain, carrying out data conversion analysis by combining the dynamic change data of the environment, the distributed temperature and the optical fiber frequency to obtain various optical fiber state data corresponding to the optical fiber to be tested.
Optionally, the embedded board card module is specifically further configured to: respectively comparing the environmental data corresponding to the first strain, the second strain and the third strain with a preset environmental change threshold value in a preliminary way; taking the strain of which the environmental data is larger than the environmental change threshold value as an intermediate strain; respectively comparing the intermediate strain with a preset strain threshold value; and taking the maximum value which is larger than the strain threshold value in the intermediate strain as a target strain.
Environmental data refers to environmental transformation data, such as temperature changes, measured by each module while measuring strain. The preset environmental change threshold value refers to a critical value of an environmental change range required to be set based on monitoring. The preset strain threshold is a critical value set based on monitoring requirements to select a more appropriate strain from a plurality of strains.
In the embodiment of the invention, when the embedded board card module receives the first strain, the second strain and the third strain, the environment data corresponding to the first strain, the second strain and the third strain are respectively compared with a preset environment change threshold value preliminarily, and the strain with the environment data larger than the environment change threshold value is selected as the intermediate strain. And then respectively comparing the intermediate strain with a preset strain threshold value, and selecting the maximum value which is larger than the strain threshold value in the intermediate strain as the target strain.
Optionally, the embedded board card module is specifically further configured to:
and carrying out integral conversion on the target strain through a preset strain conversion system to obtain a corner corresponding to the optical fiber to be tested, and carrying out integral conversion on the corner to obtain deflection corresponding to the optical fiber to be tested.
The preset strain conversion system refers to platform software in communication connection with the cloud database, wherein the platform software is similar to an expert system, an algorithm threshold analysis system is arranged in the platform software, and the platform software can be arranged at a portable computer, a remote monitoring end and the like.
In the embodiment of the invention, after the target strain is determined, the embedded board card module transmits the target strain to the strain conversion system, the target strain is subjected to integral conversion by the strain conversion system, the corner corresponding to the optical fiber to be measured is calculated, and then the deflection corresponding to the optical fiber to be measured is calculated by the strain conversion system.
And calculating the multiplication value of the target strain and the preset elastic modulus through the strain conversion system to obtain the stress corresponding to the optical fiber to be tested.
In the embodiment of the invention, the stress corresponding to the optical fiber to be measured is calculated through the strain conversion system according to the following stress calculation formula, namely, the multiplication value of the target strain and the preset elastic modulus is calculated, and the stress corresponding to the optical fiber to be measured is obtained. The stress calculation formula is:
in the method, in the process of the invention,σin the event of a stress being applied to the substrate,Eis made of materialThe modulus of elasticity of the material,εis the target strain.
And calculating the ratio of the preset section moment of inertia to the preset axial distance through the strain conversion system, and multiplying the ratio by the stress to obtain the bending moment corresponding to the optical fiber to be tested.
The bending moment calculation formula is as follows:
in the method, in the process of the invention,Mis a bending moment, and is a bending moment,Ithe moment of inertia of the cross section, y is the distance from any point to the neutral axis, and σ is the stress.
In the embodiment of the invention, the bending moment corresponding to the optical fiber to be measured is calculated through the strain conversion system according to the bending moment calculation formula, namely, the bending moment corresponding to the optical fiber to be measured is obtained by adopting the ratio of the preset section moment of inertia to the preset axial distance and multiplying the ratio by the stress.
And respectively carrying out first-order derivation and second-order derivation on the bending moment through the strain conversion system to obtain the shearing force and the load corresponding to the optical fiber to be tested.
In the embodiment of the invention, after the bending moment corresponding to the optical fiber to be measured is calculated, the strain conversion system respectively performs first-order derivative and second-order derivative on the bending moment, so that the shearing force and the load corresponding to the optical fiber to be measured are calculated.
And taking the data of the rotation angle, deflection, stress, bending moment, shearing force, load, distributed temperature, environmental dynamic change and optical fiber frequency as optical fiber state data corresponding to the optical fiber to be measured.
In the embodiment of the invention, after the target strain corresponding to the optical fiber state monitoring device is determined, the target strain is analyzed through a preset strain conversion system, so that the optical fiber state monitoring device monitors the corner, deflection, stress, bending moment, shearing force, load, distributed temperature, environmental dynamic change data and optical fiber frequency corresponding to the optical fiber to be detected, and various optical fiber state data corresponding to the optical fiber to be detected are determined.
Optionally, the embedded board card module is specifically further configured to:
invoking an optical fiber frequency acquisition module to acquire the optical fiber frequency in the optical fiber to be measured in real time; and converting the frequency of the optical fiber into the wavelength of the optical fiber and demodulating the optical fiber to obtain wavelength change data.
In the embodiment of the invention, the embedded board card module collects the optical fiber frequency in the optical fiber to be measured in real time by calling the optical fiber frequency collection module, converts the optical fiber frequency into the optical fiber wavelength and demodulates the optical fiber wavelength to obtain the wavelength change data, and then returns the wavelength change data to the corresponding module to further determine the optical fiber data corresponding to the optical fiber to be measured.
Optionally, the optical fiber state monitoring device further includes: and the signal acquisition processing industrial control module is in communication connection with the optical fiber data acquisition module, the optical fiber frequency acquisition module and the embedded board card module respectively. The signal acquisition processing industrial control module is used for controlling the working states of the optical fiber data acquisition module and the optical fiber frequency acquisition module through the signal acquisition processing industrial control computer; transmitting the optical fiber data and the optical fiber frequency to the embedded board card module.
In the embodiment of the invention, the signal acquisition processing industrial control module is used for controlling the working states of the optical fiber data acquisition module and the optical fiber frequency acquisition module by adopting the signal acquisition processing industrial control computer, so that the working states of the optical fiber data acquisition module and the optical fiber frequency acquisition module can be adjusted at any time based on monitoring requirements. And the signal acquisition processing industrial control module can collect the data acquired by each module and transmit the collected data to the embedded board card module for further data processing.
When the optical fiber state monitoring device is used, a plurality of optical fiber monitoring points can be set according to the conditions of the length, the overhead, the tension and the like of an optical cable, for example, 1 optical fiber monitoring point is set every 20 meters or so, important area testing points are properly encrypted, the sinking is measured by load analysis, and the level is measured by strain analysis. Each optical fiber monitoring point can be provided with an optical fiber state monitoring device and a plurality of sensing probes, and 1 settlement observation point and 4 horizontal external damage observation points (namely 2 horizontal convergence measuring lines are respectively arranged at two ends of the OPGW optical cable) are respectively arranged at each optical fiber monitoring point.
When the construction reaches the monitoring section, measurement is immediately carried out. During testing, 4 chords and 2 diagonals are measured by strain analysis, deformation output results are the change amounts of the chords and the diagonals which are compared in front and back, the comprehensive change amounts are decomposed into changes in the horizontal direction and the vertical direction, and the deformation amounts of the OPGW optical cable in the horizontal direction and the vertical direction are calculated based on mathematical trigonometric function conversion. For example: the optical fiber has 50 sensor points, but only can receive information of 1 to 25 sensor points, the optical fibers are reversely connected, the information of the sensor points from 27 to 50 can be received, namely, the optical fiber can be estimated, 26 is a breakpoint, and whether the optical fiber is broken or not can be determined by combining a plurality of sensor probes.
The optical fiber state monitoring device can realize double-end or single-end monitoring, the spatial resolution can reach 0.1 meter (BOTDA)/1 meter (BOTDR), and the maximum monitoring distance is as follows: 160km (BOTDA)/70 km (BOTDR); the optical fiber single-end strain testing device has the function of testing optical fiber single-end strain, wherein the highest sampling resolution is 0.05m, and the maximum sampling point number is 20000; strain testing range is within
Highest strain testing accuracy: />
The method comprises the steps of carrying out a first treatment on the surface of the The frequency scanning range is 9.9 GHz-12 GHz; the frequency sweep intervals are 1, 2, 5, 10, 20 (MHz).
In the embodiment of the invention, the embedded board card module, the optical fiber data acquisition module and the optical fiber frequency acquisition module which are respectively in communication connection with the embedded board card module are arranged in the shell, the optical fiber data acquisition module is adopted to acquire various optical fiber data from the optical fiber to be tested and transmit the various optical fiber data to the embedded board card module based on preset wavelength change data and Brillouin frequency shift, the optical fiber frequency acquisition module is adopted to determine the optical fiber frequency of the optical fiber to be tested and transmit the optical fiber frequency to the embedded board card module based on the phase difference of the conduction optical signals in the optical fiber to be tested, and the embedded board card module is adopted to determine various optical fiber state data corresponding to the optical fiber to be tested according to the received optical fiber data and the optical fiber frequency. The optical fiber state monitoring data acquisition device solves the technical problems that the existing optical fiber state monitoring data acquisition device can only acquire the temperature change of an optical fiber, or monitoring parameters are limited to strain change, other strain effects caused by the analysis stress of a system cannot be realized, and the monitoring parameters are single. The multi-parameter real-time on-line monitoring is realized by adopting the multi-module to collect various optical fiber data of the optical fiber to be detected and further processing the optical fiber data to obtain various optical fiber state data of the optical fiber to be detected, and the multi-parameter real-time on-line monitoring device is simple in structure and low in energy consumption.
Referring to fig. 3, fig. 3 is a flowchart illustrating a method for monitoring an optical fiber status according to a second embodiment of the present invention.
The embodiment of the invention provides an optical fiber state monitoring method, which relates to an embedded board card module arranged in a shell, and an optical fiber data acquisition module and an optical fiber frequency acquisition module which are respectively in communication connection with the embedded board card module, wherein the method comprises the following steps:
Further, the optical fiber data acquisition module includes an optical fiber grating data acquisition module, a distributed optical fiber data acquisition module, and an environmental and dynamic strain monitoring module, and step 301 may include the following substeps S11-S13:
and S11, calculating the multiplication value of the wavelength change data and a preset optical fiber threshold value through the optical fiber grating data acquisition module, obtaining a first strain and transmitting the first strain to the embedded board card module.
S12, substituting the power corresponding to the Brillouin frequency shift and the Brillouin frequency shift amount into a preset temperature strain formula through the distributed optical fiber data acquisition module, calculating to obtain distributed temperature and second strain, and transmitting the distributed temperature and second strain to the embedded board card module.
And S13, respectively measuring by the environment and dynamic strain monitoring module through the fiber bragg grating sensor and the fiber bragg grating sensor to obtain third strain and environment dynamic change data, and transmitting the third strain and environment dynamic change data to the embedded board card module.
Further, step 303 may include the sub-steps S21-S22 of:
s21, determining target strain through the embedded board card module according to the environmental dynamic change data, the distributed temperature and the optical fiber frequency.
Further, step S21 may include the following sub-steps S211-S214:
s211, respectively comparing the environmental data corresponding to the first strain, the second strain and the third strain with a preset environmental change threshold value through the embedded board card module.
S212, taking the strain with the environmental data larger than the environmental change threshold value as the intermediate strain through the embedded board card module.
S213, respectively comparing the intermediate strain with a preset strain threshold through the embedded board card module.
S214, taking the maximum value which is larger than the strain threshold value in the intermediate strain as the target strain through the embedded board card module.
S22, analyzing and obtaining various optical fiber state data corresponding to the optical fiber to be tested according to the environmental dynamic change data, the distributed temperature, the optical fiber frequency and the target strain.
Further, S22 may further comprise the following substeps S221-S225:
s221, performing integral conversion on target strain through a preset strain conversion system to obtain a corner corresponding to the optical fiber to be tested, and performing integral conversion on the corner to obtain deflection corresponding to the optical fiber to be tested.
S222, calculating the multiplication value of the target strain and the preset elastic modulus through the strain conversion system to obtain the stress corresponding to the optical fiber to be tested.
S223, calculating the ratio of the preset section moment of inertia to the preset axial distance through the strain conversion system, and multiplying the ratio by the stress to obtain the bending moment corresponding to the optical fiber to be tested.
S224, respectively carrying out first-order derivation and second-order derivation on the bending moment through the strain conversion system to obtain the shearing force and the load corresponding to the optical fiber to be tested.
And S225, using the data of the rotation angle, deflection, stress, bending moment, shearing force, load, distributed temperature, environment dynamic change and optical fiber frequency as the corresponding optical fiber state data of the optical fiber to be tested.
Further, step 303 may further comprise the sub-steps S31-S32 of:
s31, calling an optical fiber frequency acquisition module to acquire the optical fiber frequency in the optical fiber to be measured in real time.
S32, converting the frequency of the optical fiber into the wavelength of the optical fiber and demodulating the optical fiber to obtain wavelength change data.
Further, the signal acquisition processing industrial control module is respectively in communication connection with the optical fiber data acquisition module, the optical fiber frequency acquisition module and the embedded board card module, and the method further comprises the following steps:
the working states of the optical fiber data acquisition module and the optical fiber frequency acquisition module are controlled by the signal acquisition processing industrial control module through the signal acquisition processing industrial control computer; transmitting the optical fiber data and the optical fiber frequency to the embedded board card module.
The embodiment of the invention also provides electronic equipment, which comprises: a memory and a processor, the memory storing a computer program; the computer program, when executed by a processor, causes the processor to perform the method of monitoring the condition of an optical fiber as in any of the embodiments described above.
The memory may be an electronic memory such as a flash memory, an EEPROM (electrically erasable programmable read only memory), an EPROM, a hard disk, or a ROM. The memory has memory space for program code to perform any of the method steps described above. For example, the memory space for the program code may include individual program code for implementing the various steps in the above method, respectively. The program code can be read from or written to one or more computer program products. These computer program products comprise a program code carrier such as a hard disk, a Compact Disc (CD), a memory card or a floppy disk. The program code may be compressed, for example, in a suitable form. The codes, when executed by a computing processing device, cause the computing processing device to perform the steps in the fiber condition monitoring method described above.
The embodiment of the invention also provides a computer readable storage medium, on which a computer program is stored, which when executed by a processor, implements the optical fiber state monitoring method according to any of the above embodiments.
It will be clear to those skilled in the art that, for convenience and brevity of description, specific working procedures of the above-described systems, apparatuses and units may refer to corresponding procedures in the foregoing method embodiments, which are not repeated herein.
In the several embodiments provided in this application, it should be understood that the disclosed systems, apparatuses, and methods may be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative, e.g., the division of elements is merely a logical functional division, and there may be additional divisions of actual implementation, e.g., multiple elements or components may be combined or integrated into another system, or some features may be omitted, or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed with each other may be an indirect coupling or communication connection via some interfaces, devices or units, which may be in electrical, mechanical or other form.
The units described as separate units may or may not be physically separate, and units shown as units may or may not be physical units, may be located in one place, or may be distributed over a plurality of network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.
In addition, each functional unit in the embodiments of the present invention may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit. The integrated units may be implemented in hardware or in software functional units.
The integrated units, if implemented in the form of software functional units and sold or used as stand-alone products, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present invention may be embodied in essence or a part contributing to the prior art or all or part of the technical solution in the form of a software product stored in a storage medium, including several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the methods of the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a random access Memory (RAM, random Access Memory), a magnetic disk, or an optical disk, or other various media capable of storing program codes.
The above embodiments are only for illustrating the technical solution of the present invention, and are not limiting; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.
Claims (10)
1. An optical fiber condition monitoring device, comprising: the embedded board card module is arranged in the shell, and the optical fiber data acquisition module and the optical fiber frequency acquisition module are respectively in communication connection with the embedded board card module;
the optical fiber data acquisition module is used for acquiring various optical fiber data from the optical fiber to be tested based on preset wavelength change data and Brillouin frequency shift and transmitting the various optical fiber data to the embedded board card module;
the optical fiber frequency acquisition module is used for determining the optical fiber frequency of the optical fiber to be detected based on the phase difference of the conducted optical signals in the optical fiber to be detected and transmitting the optical fiber frequency to the embedded board card module;
the embedded board card module is used for determining various optical fiber state data corresponding to the optical fiber to be tested according to the received optical fiber data and the received optical fiber frequency.
2. The fiber optic condition monitoring device of claim 1, wherein the fiber optic data acquisition module comprises a fiber optic grating data acquisition module, a distributed fiber optic data acquisition module, and an environmental and dynamic strain monitoring module;
the optical fiber grating data acquisition module is used for calculating the multiplication value of the wavelength change data and a preset optical fiber threshold value, obtaining a first strain and transmitting the first strain to the embedded board card module;
the distributed optical fiber data acquisition module is used for substituting the power corresponding to the Brillouin frequency shift and the Brillouin frequency shift into a preset temperature strain formula, calculating to obtain distributed temperature and second strain, and transmitting the distributed temperature and second strain to the embedded board card module;
the environment and dynamic strain monitoring module is used for respectively measuring and obtaining third strain and environment dynamic change data through the fiber bragg grating sensor and transmitting the third strain and environment dynamic change data to the embedded board card module.
3. The optical fiber condition monitoring device according to claim 2, wherein the embedded board card module is specifically configured to:
determining a target strain according to the environmental dynamic change data, the distributed temperature and the optical fiber frequency;
and analyzing and obtaining various optical fiber state data corresponding to the optical fiber to be tested according to the environmental dynamic change data, the distributed temperature, the optical fiber frequency and the target strain.
4. The optical fiber condition monitoring device according to claim 3, wherein the embedded board card module is further specifically configured to:
respectively comparing the environmental data corresponding to the first strain, the second strain and the third strain with a preset environmental change threshold value in a preliminary way;
taking the strain of the environmental data larger than the environmental change threshold as an intermediate strain;
respectively comparing the intermediate strain with a preset strain threshold value;
and taking the maximum value which is larger than the strain threshold value in the intermediate strain as a target strain.
5. The optical fiber condition monitoring device according to claim 3, wherein the embedded board card module is further specifically configured to:
performing integral conversion on the target strain through a preset strain conversion system to obtain a corner corresponding to the optical fiber to be tested, and performing integral conversion on the corner to obtain deflection corresponding to the optical fiber to be tested;
calculating the multiplication value of the target strain and a preset elastic modulus through the strain conversion system to obtain the stress corresponding to the optical fiber to be tested;
calculating the ratio of a preset section moment of inertia to a preset axial distance through the strain conversion system and multiplying the ratio by the stress to obtain a bending moment corresponding to the optical fiber to be tested;
respectively carrying out first-order derivation and second-order derivation on the bending moment through the strain conversion system to obtain shearing force and load corresponding to the optical fiber to be tested;
and taking the corner, the deflection, the stress, the bending moment, the shearing force, the load, the distributed temperature, the environment dynamic change data and the optical fiber frequency as optical fiber state data corresponding to the optical fiber to be tested.
6. The optical fiber condition monitoring device according to claim 1, wherein the embedded board card module is further specifically configured to:
invoking the optical fiber frequency acquisition module to acquire the optical fiber frequency in the optical fiber to be detected in real time;
and converting the optical fiber frequency into optical fiber wavelength and demodulating to obtain the wavelength change data.
7. The fiber optic condition monitoring device of claim 1, further comprising: the signal acquisition processing industrial control module is respectively in communication connection with the optical fiber data acquisition module, the optical fiber frequency acquisition module and the embedded board card module;
the signal acquisition processing industrial control module is used for controlling the working states of the optical fiber data acquisition module and the optical fiber frequency acquisition module through the signal acquisition processing industrial control computer;
and transmitting the optical fiber data and the optical fiber frequency to the embedded board card module.
8. The utility model provides a fiber condition monitoring method which is characterized in that the method relates to an embedded board card module arranged in a shell, and a fiber data acquisition module and a fiber frequency acquisition module which are respectively connected with the embedded board card module in a communication way, and the method comprises the following steps:
acquiring various optical fiber data from an optical fiber to be tested based on preset wavelength change data and Brillouin frequency shift through the optical fiber data acquisition module, and transmitting the various optical fiber data to the embedded board card module;
determining the optical fiber frequency of the optical fiber to be detected based on the phase difference of the conducted optical signals in the optical fiber to be detected through the optical fiber frequency acquisition module and transmitting the optical fiber frequency to the embedded board card module;
and determining various optical fiber state data corresponding to the optical fiber to be tested according to the received optical fiber data and the received optical fiber frequency through the embedded board card module.
9. An electronic device comprising a memory and a processor, wherein the memory stores a computer program that, when executed by the processor, causes the processor to perform the steps of the fiber condition monitoring method of claim 8.
10. A computer readable storage medium having stored thereon a computer program, wherein the computer program when executed implements the fiber optic condition monitoring method of claim 8.
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