CN116248176A

CN116248176A - Optical fiber state monitoring and early warning method, system, equipment and medium

Info

Publication number: CN116248176A
Application number: CN202211342601.1A
Authority: CN
Inventors: 孟飞; 范长俊; 曲骅; 李建斌; 张程; 郭添亨; 杜彦锟; 许磊磊; 冯允良; 吴锦源
Original assignee: Zhongshan Power Supply Bureau of Guangdong Power Grid Co Ltd
Current assignee: Zhongshan Power Supply Bureau of Guangdong Power Grid Co Ltd
Priority date: 2022-10-31
Filing date: 2022-10-31
Publication date: 2023-06-09
Anticipated expiration: 2042-10-31
Also published as: CN116248176B

Abstract

The invention discloses an optical fiber state monitoring and early warning method, an optical fiber state monitoring and early warning system, optical fiber state monitoring and early warning equipment and an optical fiber state monitoring and early warning medium. And then loading the corresponding data page components by adopting the optical fiber monitoring data respectively, and rendering all the data page components to generate an initial optical fiber monitoring page. And then updating the initial optical fiber monitoring page based on the trigger information and the data page component to obtain an intermediate optical fiber monitoring page. And finally, carrying out early warning analysis based on the intermediate optical fiber monitoring page through a preset structural health evaluation model, and updating the intermediate optical fiber monitoring page to obtain a target optical fiber monitoring page. Through collecting multiple optical fiber monitoring data and the structure health assessment model of predetermineeing of optical fiber to be tested, realize multiple spot real-time supervision early warning, carry out comprehensive analysis to the optical fiber to be tested and generate corresponding monitoring page, make things convenient for the staff to look over, and the monitoring degree of accuracy is high.

Description

Optical fiber state monitoring and early warning method, system, equipment and medium

Technical Field

The invention relates to the technical field of optical fiber state monitoring and early warning, in particular to an optical fiber state monitoring and early warning method, an optical fiber state monitoring and early warning system, optical fiber state monitoring and early warning equipment and an optical fiber state monitoring and early warning 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 state of the optical fiber is required to be monitored and early warned in real time in the OPGW optical cable construction process.

However, the existing optical fiber state online monitoring and early warning mode can only monitor 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, the monitoring parameters are single, the monitoring accuracy is low, and the alarm prompt cannot be sent in time.

Disclosure of Invention

The invention provides an optical fiber state monitoring and early warning method, an optical fiber state monitoring and early warning system, optical fiber state monitoring and early warning equipment and an optical fiber state monitoring and early warning medium, which solve the technical problems that the existing optical fiber state on-line monitoring and early warning mode can only monitor the temperature change of an optical fiber, or monitoring parameters are only limited to strain change, other strain effects caused by the analysis stress of a system cannot be realized, the monitoring parameters are single, the monitoring accuracy is low, and an alarm prompt cannot be sent in time.

The invention provides an optical fiber state monitoring and early warning method, which comprises the following steps:

responding to the received trigger information, and calling a plurality of optical fiber data acquisition devices corresponding to the optical fiber to be detected to acquire various optical fiber monitoring data corresponding to the optical fiber to be detected respectively;

loading corresponding data page components by adopting the optical fiber monitoring data respectively, and rendering all the data page components to generate an initial optical fiber monitoring page;

updating the initial optical fiber monitoring page according to the trigger information and the data page component to obtain an intermediate optical fiber monitoring page;

and carrying out early warning analysis based on the intermediate optical fiber monitoring page through a preset structural health evaluation model, and updating the intermediate optical fiber monitoring page to obtain a target optical fiber monitoring page.

Optionally, the optical fiber data acquisition device comprises an optical fiber grating data acquisition module, a distributed optical fiber data acquisition module, an environment and dynamic strain monitoring module, an optical fiber frequency acquisition module and a plurality of sensing probes; the step of responding to the received triggering information and calling a plurality of optical fiber data acquisition devices corresponding to the optical fiber to be detected to respectively acquire various optical fiber monitoring data corresponding to the optical fiber to be detected comprises the following steps:

Responding to the received trigger information, determining a plurality of optical fiber monitoring points corresponding to the optical fiber to be tested, and arranging a corresponding optical fiber grating data acquisition module, a corresponding distributed optical fiber data acquisition module, a corresponding environment and dynamic strain monitoring module, a corresponding optical fiber frequency acquisition module and a corresponding sensing probe;

calculating the multiplication value of the wavelength change data and a preset optical fiber threshold value through the optical fiber grating data acquisition module respectively to obtain a first strain corresponding to the optical fiber monitoring point;

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 respectively, and calculating to obtain distributed temperature and second strain corresponding to the optical fiber monitoring point;

respectively measuring by adopting a fiber bragg grating sensor and a fiber bragg grating sensor through the environment and dynamic strain monitoring module to obtain third strain and environment dynamic change data corresponding to the fiber bragg grating monitoring point;

determining the optical fiber frequency corresponding to the optical fiber monitoring point based on the phase difference of the conducted optical signals in the optical fiber to be detected through the optical fiber frequency acquisition module;

external wavelength change data corresponding to the optical fiber monitoring points are obtained from the outside of the optical fiber to be detected through the sensing probe respectively;

Taking the distributed temperature, the environment dynamic change data, the optical fiber frequency, the first strain, the second strain, the third strain and the external wavelength change data as optical fiber monitoring point data corresponding to the optical fiber monitoring points;

and taking all the optical fiber monitoring point data as optical fiber monitoring data corresponding to the optical fiber to be tested.

Optionally, the data page component includes a strain component, a distributed temperature component, an environmental dynamics component, a fiber optic frequency component, and an external wavelength variation component; the initial optical fiber monitoring page is provided with a data statistics trigger key, a stress analysis trigger key and a data conversion trigger key; the step of updating the initial optical fiber monitoring page according to the trigger information and the data page component to obtain an intermediate optical fiber monitoring page comprises the following steps:

if the data statistics triggering key is triggered, respectively calling the strain component, the distributed temperature component, the environment dynamic change component, the optical fiber frequency component and the external wavelength change component to carry out data statistics by combining the triggering information, so as to obtain optical fiber monitoring statistical data corresponding to the optical fiber to be detected;

Loading the corresponding page component by adopting the optical fiber monitoring statistical data and rendering to generate an optical fiber monitoring point page;

if the stress analysis trigger key is triggered, the strain assembly is called to conduct strain analysis, and target strain corresponding to each optical fiber monitoring point is obtained;

loading the corresponding page components by adopting all the target strains and rendering to generate a target strain page;

if the data conversion triggering key is triggered, respectively calling the target strain and the external wavelength change component to perform data conversion to obtain various optical fiber state data corresponding to the optical fiber monitoring point;

loading the corresponding page components by adopting all the optical fiber state data and rendering to generate an optical fiber state data page;

and updating the initial optical fiber monitoring page by adopting the optical fiber monitoring point page, the target strain page and the optical fiber state data page as secondary pages of the initial optical fiber monitoring page respectively to obtain an intermediate optical fiber monitoring page.

Optionally, the step of calling the strain component to perform strain analysis to obtain target strain corresponding to each optical fiber monitoring point includes:

respectively comparing the environmental data corresponding to each optical fiber monitoring point with a preset environmental change threshold value;

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 in the intermediate strain as the target strain corresponding to the optical fiber monitoring point.

Optionally, the step of respectively calling the target strain and the external wavelength change component to perform data conversion to obtain a plurality of optical fiber state data corresponding to the optical fiber monitoring point includes:

respectively carrying out integral conversion on the target strain to obtain a corner corresponding to the optical fiber monitoring point, and carrying out integral conversion on the corner to obtain deflection corresponding to the optical fiber monitoring point;

calculating the multiplication value of the target strain and a preset elastic modulus to obtain the stress corresponding to the optical fiber monitoring point;

calculating the ratio of the preset section moment of inertia to the preset shaft distance and multiplying the ratio by the stress to obtain the bending moment corresponding to the optical fiber monitoring point;

respectively carrying out first-order derivation and second-order derivation on the bending moment to obtain shearing force and load corresponding to the optical fiber monitoring point;

based on the external wavelength change data, calculating and obtaining deformation of the optical fiber monitoring point corresponding to the external horizontal direction and the external vertical direction of the optical fiber;

And taking the corner, the deflection, the stress, the bending moment, the shearing force, the load, the distributed temperature, the environmental dynamic change data, the optical fiber frequency and the deformation as optical fiber state data corresponding to the optical fiber monitoring point.

Optionally, the preset structural health assessment model comprises a one-dimensional convolution layer and a long-term and short-term memory network layer; the intermediate optical fiber monitoring page is provided with an early warning analysis trigger key; the step of performing early warning analysis based on the intermediate optical fiber monitoring page through a preset structural health evaluation model and updating the intermediate optical fiber monitoring page to obtain a target optical fiber monitoring page comprises the following steps:

if the early warning analysis triggering key is triggered, extracting time sequence characteristics of the optical fiber state data corresponding to each optical fiber monitoring point through the one-dimensional convolution layer respectively to obtain initial optical fiber analysis data corresponding to the optical fiber monitoring point;

extracting long-term dependence characteristics of the initial optical fiber analysis data through the long-term and short-term memory network layer to obtain intermediate optical fiber analysis data corresponding to the optical fiber monitoring points;

obtaining target optical fiber analysis data corresponding to the optical fiber monitoring points according to the intermediate optical fiber analysis data and a preset alarm threshold;

Taking all target optical fiber analysis data as optical fiber early warning data of the optical fiber to be tested;

loading the corresponding page components by adopting the optical fiber early warning data and rendering all the page components to generate an optical fiber early warning page;

and updating the intermediate optical fiber monitoring page by taking the optical fiber early warning page as a second-level page of the intermediate optical fiber monitoring page to obtain a target optical fiber monitoring page.

Optionally, the preset alarm threshold includes a strain threshold, a crack threshold, a deflection threshold and a safety pre-warning threshold; the step of obtaining target optical fiber analysis data corresponding to the optical fiber monitoring point according to the intermediate optical fiber analysis data and a preset alarm threshold value comprises the following steps:

respectively comparing the target strain corresponding to the intermediate optical fiber analysis data with the strain threshold value to generate strain alarm data corresponding to the optical fiber monitoring point;

respectively comparing the external wavelength change data corresponding to the intermediate optical fiber analysis data with the crack threshold value to generate fission alarm data corresponding to the optical fiber monitoring point;

respectively carrying out deflection conversion on the target strain corresponding to the intermediate optical fiber analysis data, and collecting the deflection threshold value for comparison to generate deflection alarm data corresponding to the optical fiber monitoring points;

And comparing the strain alarm data, the fission alarm data and the deflection alarm data with the safety early warning threshold value respectively to obtain target optical fiber analysis data corresponding to the optical fiber monitoring point.

The invention also provides an optical fiber state monitoring and early warning system, which comprises:

the optical fiber monitoring data acquisition module is used for responding to the received trigger information and calling a plurality of optical fiber data acquisition devices corresponding to the optical fiber to be detected to respectively acquire various optical fiber monitoring data corresponding to the optical fiber to be detected;

the initial optical fiber monitoring page generation module is used for loading corresponding page components by adopting the optical fiber monitoring data respectively and rendering all the page components to generate an initial optical fiber monitoring page;

the intermediate optical fiber monitoring page obtaining module is used for updating the initial optical fiber monitoring page according to the trigger information and the page component to obtain an intermediate optical fiber monitoring page;

and the target optical fiber monitoring page obtaining module is used for carrying out early warning analysis based on the intermediate optical fiber monitoring page through a preset structural health evaluation model to obtain the target optical fiber monitoring page.

The invention also provides an electronic device, which comprises 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 the optical fiber state monitoring and early warning method.

The invention also provides a computer readable storage medium, on which a computer program is stored, which when executed implements any one of the above-mentioned optical fiber state monitoring and early warning methods.

From the above technical scheme, the invention has the following advantages:

according to the invention, the plurality of optical fiber data acquisition devices corresponding to the optical fiber to be detected are called to respectively acquire various optical fiber monitoring data corresponding to the optical fiber to be detected by responding to the received trigger information. And then loading the corresponding data page components by adopting the optical fiber monitoring data respectively, and rendering all the data page components to generate an initial optical fiber monitoring page. And then updating the initial optical fiber monitoring page based on the trigger information and the data page component to obtain an intermediate optical fiber monitoring page. And finally, carrying out early warning analysis based on the intermediate optical fiber monitoring page through a preset structural health evaluation model, and updating the intermediate optical fiber monitoring page to obtain a target optical fiber monitoring page. The method solves the technical problems that the existing optical fiber state on-line monitoring and early warning mode can only monitor 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 a system cannot be realized, the monitoring parameters are single, the monitoring accuracy is low, and the alarm reminding cannot be sent in time. Through the multiple optical fiber monitoring data of the optical fiber to be tested and the preset structural health evaluation model, multipoint real-time monitoring and early warning are realized, multiple parameters of the optical fiber to be tested are collected, the optical fiber to be tested is comprehensively analyzed to generate a corresponding monitoring page, the optical fiber to be tested is convenient for a worker to check, and the monitoring accuracy is high.

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 flowchart illustrating steps of a method for monitoring and pre-warning an optical fiber status according to a first embodiment of the present invention;

fig. 2 is a flowchart of steps of an optical fiber state monitoring and early warning method according to a second embodiment of the present invention;

fig. 3 is a block diagram of an optical fiber status monitoring and early warning system according to a third embodiment of the present invention.

Detailed Description

The embodiment of the invention provides an optical fiber state monitoring and early warning method, an optical fiber state monitoring and early warning system, optical fiber state monitoring and early warning equipment and an optical fiber state monitoring and early warning medium, which are used for solving the technical problems that the existing optical fiber state on-line monitoring and early warning mode can only monitor 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, the monitoring parameters are single, the monitoring accuracy is low, and an alarm prompt cannot be sent in time.

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 flowchart illustrating steps of an optical fiber status monitoring and early warning method according to an embodiment of the present invention.

and step 101, responding to the received trigger information, and calling a plurality of optical fiber data acquisition devices corresponding to the optical fibers to be detected to acquire various optical fiber monitoring data corresponding to the optical fibers to be detected.

The triggering information comprises positions and quantity of optical fiber monitoring points and arrangement requirements of an optical fiber data acquisition device which are required to be arranged for optical fiber state monitoring and early warning of the optical fiber to be detected.

And the optical fiber data acquisition device is used for acquiring relevant parameter changes such as wind, temperature, strain, deflection, frequency and the like. The optical fiber data acquisition device comprises an optical fiber grating data acquisition module, a distributed optical fiber data acquisition module, an environment and dynamic strain monitoring module, an optical fiber frequency acquisition module and a plurality of sensing probes. The optical fiber data acquisition device can further comprise a data processing platform for carrying out data processing on the acquired optical fiber monitoring data, and the optical fiber data acquisition device transmits the data to the data processing platform through a bottom layer transmission network. The data processing platform can amplify, filter and analog/digital convert the collected optical fiber monitoring data; sampling, storing (filing), preprocessing and sampling control are carried out on the collected optical fiber monitoring data; and carrying out data transmission and control signal reception on the collected optical fiber monitoring data. The data processing platform has high compatibility, expandability and reliability, can support data acquisition of mainstream monitoring field devices, can support data acquisition of field devices in other industries through simple expansion, has reliability of data transmission, and ensures timeliness and accuracy of acquired data.

The data processing platform can also transmit processed data to a page control system and a preset structural health evaluation model through an upper layer transmission network, wherein the page control system is a control system for loading a corresponding page component and calling the corresponding page component to construct an optical fiber monitoring page based on the received instruction and the optical fiber monitoring data.

The fiber bragg grating data acquisition module, the distributed fiber bragg grating data acquisition module, the environment and dynamic strain monitoring module, the fiber bragg grating frequency acquisition module and the sensing probe have the characteristics of stable chemical properties, corrosion resistance, insensitivity to electromagnetic interference such as lightning stroke and the like, and therefore the fiber bragg grating data acquisition module, the distributed fiber bragg grating data acquisition module, the environment and dynamic strain monitoring module, the fiber bragg grating frequency acquisition module and the sensing probe are respectively arranged on all the fiber bragg grating monitoring points. The data processing platform is mainly composed of electronic elements and is arranged at a centralized processing point, and the centralized processing point can be set according to the monitoring requirement, so that the embodiment of the invention is not limited.

In the embodiment of the invention, corresponding optical fiber monitoring points are set in response to the received trigger information, corresponding optical fiber grating data acquisition modules, distributed optical fiber data acquisition modules, environment and dynamic strain monitoring modules, optical fiber frequency acquisition modules and sensing probes are arranged, the temperature or strain coefficient of the corresponding optical fiber data acquisition device is calibrated, and each optical fiber monitoring point is respectively numbered. The optical fiber data acquisition device can autonomously select solar power supply or battery power supply, wherein the optical fiber data acquisition module 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).

And calculating the multiplication value of the wavelength change data and a preset optical fiber threshold value through an optical fiber grating data acquisition module respectively to obtain a first strain corresponding to the optical fiber monitoring point. And substituting the power corresponding to the Brillouin frequency shift and the Brillouin frequency shift amount into a preset temperature strain formula through a distributed optical fiber data acquisition module, and calculating to obtain the distributed temperature and the second strain corresponding to the optical fiber monitoring point. And respectively measuring by adopting an optical fiber grating sensor and an optical fiber sensor through an environment and dynamic strain monitoring module to obtain third strain and environment dynamic change data corresponding to the optical fiber monitoring point. And determining the optical fiber frequency corresponding to the optical fiber monitoring point 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 respectively acquiring external wavelength change data corresponding to the optical fiber monitoring points from the outside of the optical fiber to be detected through the sensing probe. And finally, taking the distributed temperature, the environmental dynamic change data, the optical fiber frequency, the first strain, the second strain, the third strain and the external wavelength change data as optical fiber monitoring point data corresponding to optical fiber monitoring points, and taking all the optical fiber monitoring point data as optical fiber monitoring data corresponding to the optical fiber to be tested.

And 102, loading corresponding data page components by adopting optical fiber monitoring data respectively, and rendering all the data page components to generate an initial optical fiber monitoring page.

The data page component includes a strain component, a distributed temperature component, an ambient dynamics component, a fiber optic frequency component, and an external wavelength variation component.

In the embodiment of the invention, the optical fiber monitoring point data corresponding to all the optical fiber monitoring points are classified according to the types of the optical fiber monitoring data, and all the first strain, the second strain and the third strain loading strain components are adopted; loading the distributed temperature components by adopting all the distributed temperatures; loading an environment dynamic change component by adopting all environment dynamic change data; loading the fiber frequency assembly with all fiber frequencies; and loading the external wavelength change component by adopting all external wavelength change data, and rendering the strain component, the distributed temperature component, the environment dynamic change component, the optical fiber frequency component and the external wavelength change component to generate an initial optical fiber monitoring page.

And step 103, updating the initial optical fiber monitoring page according to the trigger information and the data page component to obtain an intermediate optical fiber monitoring page.

The initial optical fiber monitoring page is provided with a data statistics trigger key, a stress analysis trigger key and a data conversion trigger key, the trigger key of the initial optical fiber monitoring page can be triggered by the received optical fiber monitoring data, can be triggered by receiving corresponding instructions and the like, and can be set based on actual monitoring needs, and the embodiment of the invention is not limited to the trigger key.

In the embodiment of the invention, if the data statistics trigger key is triggered, respectively calling a strain component, a distributed temperature component, an environment dynamic change component, an optical fiber frequency component and an external wavelength change component to carry out data statistics by combining trigger information, obtaining optical fiber monitoring statistical data corresponding to an optical fiber to be tested, loading a corresponding page component by adopting the optical fiber monitoring statistical data, and rendering to generate an optical fiber monitoring point page. And if the stress analysis trigger key is triggered, invoking the strain assembly to perform strain analysis to obtain target strain corresponding to each optical fiber monitoring point, loading the corresponding page assembly by adopting all the target strain, and rendering to generate a target strain page. And if the data conversion trigger key is triggered after the stress analysis trigger key is triggered, respectively calling the target strain and the external wavelength change component to perform data conversion to obtain various optical fiber state data corresponding to the optical fiber monitoring point, loading the corresponding page component by adopting all the optical fiber state data, and rendering to generate an optical fiber state data page. And finally, respectively updating the initial optical fiber monitoring page by using the optical fiber monitoring point page, the target strain page and the optical fiber state data page as the secondary page of the initial optical fiber monitoring page to obtain an intermediate optical fiber monitoring page.

And 104, performing early warning analysis based on the intermediate optical fiber monitoring page through a preset structural health evaluation model, and updating the intermediate optical fiber monitoring page to obtain a target optical fiber monitoring page.

In the embodiment of the invention, the preset structural health evaluation model comprises a one-dimensional convolution layer and a long-term and short-term memory network layer. The intermediate optical fiber monitoring page is provided with an early warning analysis trigger key. And if the early warning analysis trigger key is triggered, respectively extracting the time sequence characteristics of the optical fiber state data corresponding to each optical fiber monitoring point through the one-dimensional convolution layer to obtain initial optical fiber analysis data corresponding to the optical fiber monitoring points, and extracting the long-term dependence characteristics of the initial optical fiber analysis data through the long-term and short-term memory network layer to obtain intermediate optical fiber analysis data corresponding to the optical fiber monitoring points. According to the intermediate optical fiber analysis data and a preset alarm threshold value, target optical fiber analysis data corresponding to the optical fiber monitoring points are obtained, all the target optical fiber analysis data are used as optical fiber early warning data of the optical fiber to be tested, the corresponding page components are loaded by the optical fiber early warning data and are all rendered, an optical fiber early warning page is generated, the optical fiber early warning page is used as a secondary page of the intermediate optical fiber monitoring page, and the intermediate optical fiber monitoring page is updated, so that the target optical fiber monitoring page is obtained.

In the embodiment of the invention, the plurality of optical fiber data acquisition devices corresponding to the optical fiber to be detected are called to respectively acquire the plurality of optical fiber monitoring data corresponding to the optical fiber to be detected by responding to the received trigger information. And then loading the corresponding data page components by adopting the optical fiber monitoring data respectively, and rendering all the data page components to generate an initial optical fiber monitoring page. And then updating the initial optical fiber monitoring page based on the trigger information and the data page component to obtain an intermediate optical fiber monitoring page. And finally, carrying out early warning analysis based on the intermediate optical fiber monitoring page through a preset structural health evaluation model, and updating the intermediate optical fiber monitoring page to obtain a target optical fiber monitoring page. The method solves the technical problems that the existing optical fiber state on-line monitoring and early warning mode can only monitor 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 a system cannot be realized, the monitoring parameters are single, the monitoring accuracy is low, and the alarm reminding cannot be sent in time. Through the multiple optical fiber monitoring data of the optical fiber to be tested and the preset structural health evaluation model, multipoint real-time monitoring and early warning are realized, multiple parameters of the optical fiber to be tested are collected, the optical fiber to be tested is comprehensively analyzed to generate a corresponding monitoring page, the optical fiber to be tested is convenient for a worker to check, and the monitoring accuracy is high.

Referring to fig. 2, fig. 2 is a flowchart illustrating steps of a fiber status monitoring and early warning method according to a second embodiment of the present invention.

Step 201, responding to the received trigger information, and calling a plurality of optical fiber data acquisition devices corresponding to the optical fibers to be detected to acquire various optical fiber monitoring data corresponding to the optical fibers to be detected.

Further, the optical fiber data acquisition device includes an optical fiber grating data acquisition module, a distributed optical fiber data acquisition module, an environmental and dynamic strain monitoring module, an optical fiber frequency acquisition module, and a plurality of sensing probes, and step 201 may include the following substeps S11-S18:

and S11, responding to the received trigger information, determining a plurality of optical fiber monitoring points corresponding to the optical fiber to be tested, and arranging a corresponding optical fiber grating data acquisition module, a distributed optical fiber data acquisition module, an environment and dynamic strain monitoring module, an optical fiber frequency acquisition module and a plurality of sensing probes.

In the embodiment of the invention, when the trigger information sent by the data processing platform or other equipment is received, the fiber monitoring points to be laid of the optical fiber to be tested, how each fiber monitoring point is laid with the fiber bragg grating data acquisition module, the distributed fiber bragg grating data acquisition module, the environment and dynamic strain monitoring module, the fiber frequency acquisition module and the sensing probes are determined based on the trigger information. Based on the conditions of optical cable length, overhead, tension and the like, a plurality of optical fiber monitoring points are arranged, for example, 1 optical fiber monitoring point is arranged every 20 meters, important area testing points are encrypted properly, the sinking is measured by load analysis, and the level is measured by strain analysis. And 1 settlement observation point and 4 horizontal external damage observation points (namely 2 horizontal convergence measuring lines which are respectively arranged at two ends of an OPGW optical cable, namely an optical fiber to be measured) are arranged at each optical fiber monitoring point.

And S12, calculating the multiplication value of the wavelength change data and a preset optical fiber threshold value through the optical fiber grating data acquisition module respectively to obtain a first strain corresponding to the optical fiber monitoring point.

In the embodiment of the invention, when the optical fiber to be detected is deformed in the OPGW optical cable construction process, the wavelength of light transmitted in the optical fiber to be detected 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 corresponding to each optical fiber monitoring point 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.

S13, substituting the power corresponding to the Brillouin frequency shift and the Brillouin frequency shift amount into a preset temperature strain formula through a distributed optical fiber data acquisition module, and calculating to obtain the distributed temperature and the second strain corresponding to the optical fiber monitoring point.

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 acquired power and brillouin frequency shift quantity corresponding to the brillouin frequency shift are substituted into a preset temperature strain formula through the distributed optical fiber data acquisition module, and distributed temperature and second strain corresponding to each optical fiber monitoring point are calculated.

And S14, respectively measuring by adopting an optical fiber grating sensor and an optical fiber sensor through an environment and dynamic strain monitoring module to obtain third strain and environment dynamic change data corresponding to the optical fiber monitoring point.

In the embodiment of the invention, the environment and dynamic strain monitoring module comprises an optical fiber grating sensor and an optical fiber sensor, each optical fiber monitoring point respectively adopts the optical fiber grating sensor to measure the third strain of the optical fiber to be tested, adopts the optical fiber sensor to measure the environment dynamic change data of the optical fiber to be tested, and the environment dynamic change data are temperature, vibration and the like, so that the third strain and the environment dynamic change data respectively corresponding to all the optical fiber monitoring points corresponding to the optical fiber to be tested are obtained.

S15, determining the optical fiber frequency corresponding to the optical fiber monitoring point based on the phase difference of the conducted optical signals in the optical fiber to be detected through the optical fiber frequency acquisition module.

In the embodiment of the invention, each optical fiber monitoring point tests the signal vibration frequency by measuring the phase difference of the conducted optical signal in the optical fiber to be tested based on the wavelength change and the Brillouin frequency shift signal in the optical fiber to be tested through the optical fiber frequency acquisition module, so that the optical fiber frequency acquired by each optical fiber monitoring point is obtained.

S16, respectively acquiring external wavelength change data corresponding to the optical fiber monitoring points from the outside of the optical fiber to be detected through the sensing probe.

In the embodiment of the invention, each optical fiber monitoring point can be provided with an optical fiber grating data acquisition module, a distributed optical fiber data acquisition module, an environment and dynamic strain monitoring module, an optical fiber frequency acquisition module and a plurality of sensing probes, wherein 1 settlement observation point and 4 horizontal outward-breaking observation points (namely 2 horizontal convergence measuring lines are respectively arranged at two ends of an OPGW optical cable) are respectively arranged at each optical fiber monitoring point. Each optical fiber monitoring point is respectively provided with a plurality of sensing probes based on monitoring requirements, external wavelength change data corresponding to the outside of the optical fiber to be monitored are respectively collected through the sensing probes, and when the page control system does not receive the optical fiber monitoring data corresponding to all the optical fiber monitoring points, the external wavelength change data can be combined to determine whether the optical fiber to be monitored has a section or not, so that the accuracy of a monitoring result is high.

And S17, taking the distributed temperature, the environmental dynamic change data, the optical fiber frequency, the first strain, the second strain, the third strain and the external wavelength change data as optical fiber monitoring point data corresponding to the optical fiber monitoring points.

In the embodiment of the invention, the fiber grating data acquisition module, the distributed fiber grating data acquisition module, the environment and dynamic strain monitoring module, the fiber frequency acquisition module and the distributed temperature, environment dynamic change data, the fiber frequency, the first strain, the second strain, the third strain and the external wavelength change data acquired by a plurality of sensing probes which are arranged at each fiber monitoring point are respectively used as fiber monitoring point data corresponding to the fiber monitoring points.

And S18, taking all the optical fiber monitoring point data as optical fiber monitoring data corresponding to the optical fiber to be tested.

In the embodiment of the invention, distributed temperature, environment dynamic change data, optical fiber frequency, first strain, second strain, third strain and external wavelength change data acquired by all optical fiber monitoring points are used as optical fiber monitoring data corresponding to the optical fiber to be tested.

And 202, loading corresponding data page components by adopting optical fiber monitoring data respectively, and rendering all the data page components to generate an initial optical fiber monitoring page.

In the embodiment of the invention, when the optical fiber monitoring data corresponding to the optical fiber to be detected is received, all the optical fiber monitoring point data are classified according to the types of the optical fiber monitoring data, and all the first strain, the second strain and the third strain loading strain components are adopted; loading the distributed temperature components by adopting all the distributed temperatures; loading an environment dynamic change component by adopting all environment dynamic change data; loading the fiber frequency assembly with all fiber frequencies; and loading the external wavelength change component by adopting all external wavelength change data, and rendering the strain component, the distributed temperature component, the environment dynamic change component, the optical fiber frequency component and the external wavelength change component to generate an initial optical fiber monitoring page.

And 203, updating the initial optical fiber monitoring page according to the trigger information and the data page component to obtain an intermediate optical fiber monitoring page.

Further, the data page component comprises a strain component, a distributed temperature component, an environment dynamic change component, an optical fiber frequency component and an external wavelength change component; the initial optical fiber monitoring page is provided with a data statistics trigger key, a stress analysis trigger key and a data conversion trigger key; step 203 may comprise the following sub-steps S21-S27:

And S21, if the data statistics trigger key is triggered, respectively calling the strain component, the distributed temperature component, the environment dynamic change component, the optical fiber frequency component and the external wavelength change component to carry out data statistics by combining the trigger information, so as to obtain optical fiber monitoring statistical data corresponding to the optical fiber to be tested.

In the embodiment of the invention, when a data statistics trigger key is triggered, the data information corresponding to the strain component, the distributed temperature component, the environment dynamic change component, the optical fiber frequency component and the external wavelength change component is obtained, the number of the data information corresponding to each component is respectively compared with the number of optical fiber monitoring points in the trigger information, whether the data information corresponding to each component contains the collected optical fiber monitoring point data of all the optical fiber monitoring points is judged, and the statistical result obtained by judgment is used as the optical fiber monitoring statistical data corresponding to the optical fiber to be tested.

And S22, loading the corresponding page assembly by adopting the optical fiber monitoring statistical data and rendering to generate an optical fiber monitoring point page.

In the embodiment of the invention, based on the number of the optical fiber monitoring points in the trigger information, whether the data information corresponding to each component contains the collected optical fiber monitoring point data of all the optical fiber monitoring points is counted, the counted result is used as the optical fiber monitoring counted data corresponding to the optical fiber to be tested, and the page components corresponding to the dishes are clamped and rendered based on the optical fiber monitoring counted data, so that an optical fiber monitoring point page is generated.

And S23, if the stress analysis trigger key is triggered, the strain component is called to conduct strain analysis, and target strain corresponding to each optical fiber monitoring point is obtained.

Further, step S23 may include the following substeps S231-S234:

s231, respectively comparing the environment data corresponding to each optical fiber monitoring point with a preset environment change threshold value.

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 threshold value which is set based on monitoring and is more suitable to be selected from a plurality of strains.

In the embodiment of the invention, when the stress analysis trigger key is triggered, the environmental data corresponding to the first strain, the second strain and the third strain acquired by each optical fiber monitoring point are respectively compared and screened with a preset environmental change threshold value.

S232, taking the strain of which the environmental data is larger than the environmental change threshold value as the intermediate strain.

In the embodiment of the invention, the strain which is larger than the environmental change threshold value in the environmental data corresponding to the first strain, the second strain and the third strain is selected as the intermediate strain acquired by the corresponding optical fiber monitoring point.

S233, respectively comparing the intermediate strain with a preset strain threshold.

In the embodiment of the invention, the intermediate strain selected by each optical fiber monitoring point is respectively subjected to further strain comparison with a preset strain threshold.

S234, taking the maximum value which is larger than the strain threshold in the intermediate strain as the target strain corresponding to the optical fiber monitoring point.

In the embodiment of the invention, the maximum value which is larger than the strain threshold in the middle strain is selected from each optical fiber monitoring point respectively, and the maximum value is used as the target strain corresponding to the optical fiber monitoring point.

And S24, loading the corresponding page components by adopting all target strains and rendering to generate a target strain page.

In the embodiment of the invention, based on the strain components, the target strain corresponding to each optical fiber monitoring point is determined, then all the target strains are adopted to load the corresponding page components, and the page components are rendered, so that a target strain page is generated.

And S25, if the data conversion trigger key is triggered, respectively calling the target strain and external wavelength change component to perform data conversion, and obtaining various optical fiber state data corresponding to the optical fiber monitoring point.

Further, step S25 may include the following substeps S251-S256:

S251, respectively carrying out integral conversion on the target strain to obtain a corner corresponding to the optical fiber monitoring point, and carrying out integral conversion on the corner to obtain deflection corresponding to the optical fiber monitoring point.

In the embodiment of the invention, the targets corresponding to the optical fiber monitoring points are subjected to integral conversion respectively, the corners corresponding to the optical fiber monitoring points are calculated, and then the corners are subjected to integral conversion, so that the deflection corresponding to the optical fiber monitoring points is calculated.

S252, calculating the multiplication value of the target strain and the preset elastic modulus to obtain the stress corresponding to the optical fiber monitoring point.

In the embodiment of the invention, the stress corresponding to each optical fiber monitoring point is calculated according to the following stress calculation formula, namely, the multiplication value of the target strain and the preset elastic modulus is calculated, so that the stress corresponding to the optical fiber monitoring point 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,Eas a function of the modulus of elasticity of the material,

is the target strain.

S253, calculating the ratio of the preset section moment of inertia to the preset shaft distance, and multiplying the ratio by the stress to obtain the bending moment corresponding to the optical fiber monitoring point.

In the embodiment of the invention, the bending moment corresponding to each optical fiber monitoring point is calculated according to the following bending moment calculation formula, namely, the bending moment corresponding to the optical fiber monitoring point is obtained by adopting the ratio of the preset section moment of inertia to the preset shaft distance and multiplying the ratio by the stress. 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,Iis the moment of inertia of the cross section,yfor the distance of any point to the neutral axis,σis stress.

S254, respectively carrying out first-order derivation and second-order derivation on the bending moment to obtain the shearing force and the load corresponding to the optical fiber monitoring point.

In the embodiment of the invention, after the bending moment corresponding to each optical fiber monitoring point is calculated, the first-order derivative and the second-order derivative are respectively carried out on the bending moment, so that the shearing force and the load corresponding to the optical fiber monitoring point are calculated.

And S255, calculating the deformation of the optical fiber monitoring point corresponding to the horizontal direction and the vertical direction of the outside of the optical fiber based on the external wavelength change data.

In the embodiment of the invention, the strain change of chord length and diagonal can be obtained by the strain change value corresponding to the strain change value of the wavelength of the sensing probe, and the deformation of each optical fiber monitoring point corresponding to the horizontal direction and the vertical direction of the outside of the optical fiber can be obtained by combining the mathematical three-dimensional solid geometry analysis through the external wavelength change data acquired by the strain conversion system based on the plurality of sensing probes of each optical fiber monitoring point.

And S256, using the corner, deflection, stress, bending moment, shearing force, load, distributed temperature, environment dynamic change data, optical fiber frequency and deformation as optical fiber state data corresponding to the optical fiber monitoring points.

In the embodiment of the invention, after the target strain corresponding to each optical fiber state monitoring point is determined, the target strain is respectively analyzed to obtain the corner, deflection, stress, bending moment, shearing force, load, distributed temperature, environment dynamic change data, optical fiber frequency, target strain and deformation monitored by the optical fiber state monitoring device, so that various optical fiber state data corresponding to each optical fiber monitoring point are determined.

And S26, loading the corresponding page component by adopting all the optical fiber state data and rendering to generate an optical fiber state data page.

In the embodiment of the invention, after various optical fiber state data corresponding to the optical fiber monitoring points are obtained by respectively calling the target strain and the external wavelength change component to perform data conversion, all the optical fiber state data are loaded into the corresponding page component, and the page component is rendered, so that the optical fiber state data page of the optical fiber to be tested is obtained.

And S27, updating the initial optical fiber monitoring page by adopting the optical fiber monitoring point page, the target strain page and the optical fiber state data page as the secondary page of the initial optical fiber monitoring page respectively to obtain an intermediate optical fiber monitoring page.

In the embodiment of the invention, the data statistics trigger key, the stress analysis trigger key and the data conversion trigger key are triggered in sequence to generate the corresponding optical fiber monitoring point page, the target strain page and the optical fiber state data page, and the optical fiber monitoring point page, the target strain page and the optical fiber state data page are respectively used as the secondary pages of the initial optical fiber monitoring page, so that the initial optical fiber monitoring page is updated, and the intermediate optical fiber monitoring page is obtained.

And 204, if the early warning analysis trigger key is triggered, respectively extracting the time sequence characteristics of the optical fiber state data corresponding to each optical fiber monitoring point through the one-dimensional convolution layer to obtain initial optical fiber analysis data corresponding to the optical fiber monitoring point.

The preset structural health assessment model comprises a one-dimensional convolution layer and a long-short-term memory network layer, and an early warning analysis trigger key is arranged on an intermediate optical fiber monitoring page. Taking wavelength variation as an example, when no change occurs, the wavelength signal remains stable to a certain extent, and the wavelength signal remains relatively unchanged in a time sequence; when the wavelength signal changes, the threshold setting is combined, the intrusion signal is judged and extracted by utilizing the grading threshold of the signal, and the disturbance signal frequency domain characteristics are adaptively extracted based on a one-dimensional convolutional neural network of the frequency domain information after Fourier transformation of the intrusion signal. And training the network by utilizing a sample data set acquired by a large number of experiments, and verifying the classification and identification results of the network. However, machine learning presents a long-term dependency problem in long-term computing, and thus long-term dependency of data can be resolved based on long-term memory networks. A forgetting gate, an input gate and an output gate are introduced into a network structure of the long-short-period memory network, and a storage unit is used for replacing simple neurons, so that the problems of gradient explosion and gradient disappearance are avoided.

In the embodiment of the invention, when the early warning analysis trigger key is triggered by the optical fiber state data corresponding to each optical fiber monitoring point or receives a corresponding trigger instruction, the optical fiber state data corresponding to the optical fiber monitoring point is transmitted to the structural health evaluation model, firstly, the optical fiber state data is transmitted to the one-dimensional convolution layer to extract the time sequence characteristics of the optical fiber state data corresponding to each optical fiber monitoring point respectively, and the initial optical fiber analysis data corresponding to each optical fiber monitoring point is output. The initial optical fiber analysis data is data composed of time series characteristics of optical fiber state data corresponding to optical fiber monitoring points.

And 205, extracting long-term dependence characteristics of the initial optical fiber analysis data through the long-term and short-term memory network layer to obtain intermediate optical fiber analysis data corresponding to the optical fiber monitoring points.

In the embodiment of the invention, the initial optical fiber analysis data corresponding to each optical fiber monitoring point is transmitted to a long-term and short-term memory network layer to extract the long-term dependence characteristic of the initial optical fiber analysis data, and the intermediate optical fiber analysis data corresponding to each optical fiber monitoring point is output. The intermediate optical fiber analysis data is data obtained by removing long-term dependence of initial optical fiber analysis data through a long-term and short-term memory network.

And 206, obtaining target optical fiber analysis data corresponding to the optical fiber monitoring points according to the intermediate optical fiber analysis data and a preset alarm threshold.

Further, the preset alarm threshold value comprises a strain threshold value, a crack threshold value, a deflection threshold value and a safety early warning threshold value; step 206 may include the following substeps S31-S34:

s31, respectively comparing the target strain and the strain threshold corresponding to the intermediate optical fiber analysis data, and generating strain alarm data corresponding to the optical fiber monitoring points.

In the embodiment of the invention, the response condition of the strain of the key section in a period of time is statistically analyzed, a statistical strain threshold is obtained by analysis, and the strain threshold is set by combining with a design theoretical value. And comparing the targets corresponding to the intermediate optical fiber analysis data corresponding to the optical fiber monitoring points with strain thresholds respectively to generate strain alarm data corresponding to the optical fiber monitoring points, sending out corresponding early warning signals by the monitoring page when the strain of the targets exceeds the strain thresholds, recording the current data and the state in a database, and automatically correcting the thresholds according to long-term recorded data by the page control system. The early warning signal can be an early warning signal sent out in the form of striking graph, sound and the like on the interface to prompt the manager, and the manager is notified by sending a short message, an email and the like in real time.

S32, respectively comparing the external wavelength change data corresponding to the intermediate optical fiber analysis data with the crack threshold value to generate fission alarm data corresponding to the optical fiber monitoring point.

In the embodiment of the invention, the crack threshold of the optical fiber to be tested is determined based on the crack width measured by the appearance inspection, the crack limit value specified in the maintenance specification and the design theoretical value. And comparing the external wavelength change data corresponding to the intermediate optical fiber analysis data corresponding to each optical fiber monitoring point with the target strain and the crack threshold value to generate fission alarm data corresponding to the optical fiber monitoring point, sending out corresponding early warning signals by the monitoring page when the external wavelength change data exceeds the strain threshold value, recording the current data and the state in the database, and automatically correcting the threshold value by the page control system according to the long-term recorded data.

S33, respectively carrying out deflection conversion on target strain corresponding to the middle optical fiber analysis data, and comparing the deflection threshold value, so as to generate deflection alarm data corresponding to the optical fiber monitoring points.

In the embodiment of the invention, the deflection threshold value of the optical fiber to be tested is set based on the deflection measured by periodic inspection and the design theoretical value. Performing deflection conversion on target strain corresponding to intermediate optical fiber analysis data corresponding to each optical fiber monitoring point to obtain deflection corresponding to each optical fiber monitoring point, comparing the deflection with a deflection threshold value respectively, generating deflection alarm data corresponding to the optical fiber monitoring points, sending out corresponding early warning signals by a monitoring page when the deflection exceeds the strain threshold value, recording current data and states in a database, and automatically correcting the threshold value by a page control system according to long-term recorded data.

S34, the strain alarm data, the fission alarm data and the deflection alarm data are respectively compared with corresponding safety early warning thresholds, and target optical fiber analysis data corresponding to the optical fiber monitoring points are obtained.

Different safety early warning grades are respectively set on the basis of the damage degree of the optical fiber structure, wherein the safety early warning grades are classified into three grades, when the optical fiber structure is slightly damaged, the influence on the function of the structure is small, the trend of disease development tends to be stable, and the risk grade corresponding to the optical fiber is a first grade yellow early warning; when the optical fiber structure is in a dangerous condition, the function of a structural part is lost, and the corresponding risk level of the optical fiber is a secondary orange early warning; when the optical fiber structure is in a dangerous condition, the function of the structural part is lost, and the corresponding risk level of the optical fiber is three-level red early warning. And setting corresponding safety early warning thresholds according to the number of times of sending early warning signals contained in the strain alarm data, the fission alarm data and the deflection alarm data respectively according to each data type.

In the embodiment of the invention, the times of sending the early warning signals contained in the strain warning data, the fission warning data and the deflection warning data corresponding to each optical fiber monitoring point are respectively compared with the corresponding safety early warning threshold values, the safety early warning grade of each optical fiber monitoring point corresponding to the optical fiber to be detected is determined based on the comparison result, so that the target optical fiber analysis data corresponding to each optical fiber monitoring point is generated, and when the structure of the optical fiber to be detected has dangerous conditions, a manager is informed to close traffic in time, and traffic is forbidden.

And 207, taking all target optical fiber analysis data as optical fiber early warning data of the optical fiber to be tested.

In the embodiment of the invention, the optical fiber early warning data of the optical fiber to be detected is obtained by summarizing the target optical fiber analysis data corresponding to each optical fiber monitoring point.

And step 208, loading the corresponding page components by adopting the optical fiber early warning data and rendering all the page components to generate an optical fiber early warning page.

In the embodiment of the invention, after the optical fiber early warning data of the optical fiber to be detected is obtained, loading the corresponding page component by adopting the optical fiber early warning data, and rendering the page component so as to generate an optical fiber early warning page.

And 209, updating the intermediate optical fiber monitoring page by taking the optical fiber early warning page as a second-level page of the intermediate optical fiber monitoring page to obtain a target optical fiber monitoring page.

In the embodiment of the invention, an optical fiber early warning page corresponding to an optical fiber to be detected is used as a secondary page of an intermediate optical fiber monitoring page, and the intermediate optical fiber monitoring page is updated based on the secondary page, so that a target optical fiber monitoring page corresponding to the optical fiber to be detected is obtained, wherein the target optical fiber monitoring page is a visual simulation page, an account number and password mode is supported, a verification code can be acquired through a super administrator when the password is forgotten, a new password is set, 3D display of an optical fiber (comprising an optical fiber data acquisition device arranged on the optical fiber) is supported, and operations such as rotation of any angle and inclination, amplification, reduction and the like are supported. For the different states of the detection point, different colors are used for representing. The visual simulation interface is based on a Java development page, supports a Windows Server 2008R2 operating system, can realize the visualization of the state of an optical fiber monitoring point, and performs heartbeat display once when one optical fiber monitoring data is received.

In the embodiment of the invention, the plurality of optical fiber data acquisition devices corresponding to the optical fiber to be detected are called to respectively acquire the plurality of optical fiber monitoring data corresponding to the optical fiber to be detected by responding to the received trigger information. And then loading the corresponding data page components by adopting the optical fiber monitoring data respectively, rendering the data page components to generate an initial optical fiber monitoring page, and updating the initial optical fiber monitoring page based on the trigger information and the data page components to obtain an intermediate optical fiber monitoring page. When the early warning analysis trigger key arranged on the middle optical fiber monitoring page is triggered, the time sequence characteristics of the optical fiber state data corresponding to each optical fiber monitoring point are respectively extracted through the one-dimensional convolution layer, and initial optical fiber analysis data corresponding to the optical fiber monitoring points are obtained. And extracting long-term dependence characteristics of the initial optical fiber analysis data through the long-term and short-term memory network layer to obtain intermediate optical fiber analysis data corresponding to the optical fiber monitoring points, and obtaining target optical fiber analysis data corresponding to the optical fiber monitoring points based on the intermediate optical fiber analysis data and a preset alarm threshold value. And taking all target optical fiber analysis data as optical fiber early warning data of the optical fiber to be detected, loading corresponding page components by adopting the optical fiber early warning data, rendering all the optical fiber early warning data, generating an optical fiber early warning page, and updating a middle optical fiber monitoring page by taking the optical fiber early warning page as a second-level page of the middle optical fiber monitoring page to obtain the target optical fiber monitoring page. The long-term dependence problem of the data is solved through the long-term memory network, the intrusion signal is identified through the one-dimensional convolution layer and the long-term memory network layer, interference in the data is removed, the obtained intermediate optical fiber analysis data is compared with a preset alarm threshold value, accurate optical fiber early warning data is obtained, and an early warning signal is timely sent.

Referring to fig. 3, fig. 3 is a block diagram illustrating a fiber status monitoring and early warning system according to a third embodiment of the present invention.

The embodiment of the invention provides an optical fiber state monitoring and early warning system, which comprises:

the optical fiber monitoring data acquisition module 301 is configured to respond to the received trigger information, and call a plurality of optical fiber data acquisition devices corresponding to the optical fiber to be tested to acquire a plurality of optical fiber monitoring data corresponding to the optical fiber to be tested respectively;

the initial optical fiber monitoring page generation module 302 is configured to load the corresponding page components with optical fiber monitoring data and render all the page components to generate an initial optical fiber monitoring page.

And the intermediate optical fiber monitoring page obtaining module 303 is configured to update the initial optical fiber monitoring page according to the trigger information and the page component, and obtain the intermediate optical fiber monitoring page.

The target optical fiber monitoring page obtaining module 304 is configured to obtain a target optical fiber monitoring page by performing early warning analysis based on the intermediate optical fiber monitoring page through a preset structural health evaluation model.

Optionally, the optical fiber data acquisition device includes an optical fiber grating data acquisition module, a distributed optical fiber data acquisition module, an environment and dynamic strain monitoring module, an optical fiber frequency acquisition module and a plurality of sensing probes, and the optical fiber monitoring data acquisition module 301 includes:

And the determining optical fiber data acquisition device module is used for responding to the received trigger information, determining a plurality of optical fiber monitoring points corresponding to the optical fiber to be detected, and arranging a corresponding optical fiber grating data acquisition module, a distributed optical fiber data acquisition module, an environment and dynamic strain monitoring module, an optical fiber frequency acquisition module and a plurality of sensing probes.

The first strain obtaining module is used for calculating the multiplication value of the wavelength change data and a preset optical fiber threshold value through the optical fiber grating data acquisition module respectively to obtain the first strain corresponding to the optical fiber monitoring point.

The distributed temperature and second strain obtaining module is used for substituting the power corresponding to the Brillouin frequency shift and the Brillouin frequency shift into a preset temperature strain formula through the distributed optical fiber data acquisition module respectively, and calculating to obtain the distributed temperature and the second strain corresponding to the optical fiber monitoring point.

And the third strain and environment dynamic change data obtaining module is used for obtaining the third strain and environment dynamic change data corresponding to the optical fiber monitoring point by respectively measuring the third strain and the environment dynamic change data through the environment and dynamic strain monitoring module by adopting the optical fiber grating sensor and the optical fiber sensor.

The optical fiber frequency determining module is used for determining the optical fiber frequency corresponding to the optical fiber monitoring point based on the phase difference of the conducted optical signals in the optical fiber to be detected through the optical fiber frequency collecting module.

The external wavelength change data acquisition module is used for acquiring external wavelength change data corresponding to the optical fiber monitoring points from the outside of the optical fiber to be detected through the sensing probe.

The optical fiber monitoring point data obtaining module is used for taking distributed temperature, environment dynamic change data, optical fiber frequency, first strain, second strain, third strain and external wavelength change data as optical fiber monitoring point data corresponding to the optical fiber monitoring points.

And the optical fiber monitoring data acquisition sub-module is used for taking all optical fiber monitoring point data as optical fiber monitoring data corresponding to the optical fiber to be tested.

Optionally, the data page component includes a strain component, a distributed temperature component, an ambient dynamics component, a fiber optic frequency component, and an external wavelength variation component. The initial optical fiber monitoring page is provided with a data statistics trigger key, a stress analysis trigger key and a data conversion trigger key. The intermediate fiber monitoring page obtaining module 303 includes:

and the optical fiber monitoring statistical data obtaining module is used for respectively calling the strain component, the distributed temperature component, the environment dynamic change component, the optical fiber frequency component and the external wavelength change component to carry out data statistics by combining the trigger information if the data statistics trigger key is triggered, so as to obtain optical fiber monitoring statistical data corresponding to the optical fiber to be detected.

The optical fiber monitoring point page generation module is used for loading the corresponding page assembly by adopting the optical fiber monitoring statistical data and rendering the page assembly to generate an optical fiber monitoring point page.

And the target strain obtaining module is used for calling the strain component to carry out strain analysis if the stress analysis trigger key is triggered, so as to obtain the target strain corresponding to each optical fiber monitoring point.

The target strain page generation module is used for loading the corresponding page components by adopting all target strains and rendering the page components to generate a target strain page.

And the optical fiber state data obtaining module is used for respectively calling the target strain and the external wavelength change component to carry out data conversion if the data conversion trigger key is triggered, so as to obtain various optical fiber state data corresponding to the optical fiber monitoring point.

The optical fiber state data page generation module is used for loading the corresponding page components by adopting all the optical fiber state data and rendering the corresponding page components to generate an optical fiber state data page.

The intermediate optical fiber monitoring page obtaining submodule is used for updating the initial optical fiber monitoring page by adopting an optical fiber monitoring point page, a target strain page and an optical fiber state data page as secondary pages of the initial optical fiber monitoring page respectively to obtain the intermediate optical fiber monitoring page.

Alternatively, the target strain derivation module may perform the steps of:

respectively comparing the environmental data corresponding to each optical fiber monitoring point with a preset environmental change threshold value preliminarily;

taking the strain of which the environmental data is larger than the environmental change threshold value as an intermediate strain;

Optionally, the fiber optic status data obtaining module may perform the steps of:

calculating the multiplication value of the target strain and the preset elastic modulus to obtain the stress corresponding to the optical fiber monitoring point;

calculating the ratio of a preset section moment of inertia to a preset shaft distance, and multiplying the ratio by stress to obtain a bending moment corresponding to an optical fiber monitoring point;

based on the external wavelength change data, calculating deformation of the optical fiber monitoring points corresponding to the external horizontal direction and the external vertical direction of the optical fiber;

And taking the corner, deflection, stress, bending moment, shearing force, load, distributed temperature, environment dynamic change data, optical fiber frequency and deformation as optical fiber state data corresponding to the optical fiber monitoring points.

Optionally, the preset structural health assessment model comprises a one-dimensional convolution layer and a long-term and short-term memory network layer; the intermediate fiber monitoring page is provided with an early warning analysis trigger key, and the target fiber monitoring page obtaining module 304 includes:

and the initial optical fiber analysis data obtaining module is used for respectively extracting the time sequence characteristics of the optical fiber state data corresponding to each optical fiber monitoring point through the one-dimensional convolution layer if the early warning analysis trigger key is triggered, so as to obtain the initial optical fiber analysis data corresponding to the optical fiber monitoring point.

And the intermediate optical fiber analysis data obtaining module is used for extracting long-term dependence characteristics of the initial optical fiber analysis data through the long-term and short-term memory network layer to obtain intermediate optical fiber analysis data corresponding to the optical fiber monitoring points.

And the target optical fiber analysis data acquisition module is used for acquiring target optical fiber analysis data corresponding to the optical fiber monitoring points according to the intermediate optical fiber analysis data and a preset alarm threshold value.

And the optical fiber early warning data acquisition module is used for taking all target optical fiber analysis data as optical fiber early warning data of the optical fiber to be measured.

The optical fiber early warning page generation module is used for loading the corresponding page components by adopting optical fiber early warning data and rendering all the page components to generate an optical fiber early warning page.

And the target optical fiber monitoring page obtaining submodule is used for updating the intermediate optical fiber monitoring page by taking the optical fiber early warning page as a second-level page of the intermediate optical fiber monitoring page to obtain the target optical fiber monitoring page.

Optionally, the preset alarm threshold includes a strain threshold, a crack threshold, a deflection threshold and a safety pre-warning threshold, and the target optical fiber analysis data obtaining module may execute the following steps:

respectively comparing target strain and strain threshold values corresponding to the intermediate optical fiber analysis data to generate strain alarm data corresponding to the optical fiber monitoring points;

respectively comparing external wavelength change data corresponding to the middle optical fiber analysis data with a crack threshold value to generate fission alarm data corresponding to the optical fiber monitoring point;

respectively carrying out deflection conversion on target strain corresponding to the middle optical fiber analysis data, and comparing the target strain with a set deflection threshold value to generate deflection alarm data corresponding to the optical fiber monitoring points;

and comparing the strain alarm data, the fission alarm data and the deflection alarm data with corresponding safety early warning thresholds respectively to obtain target optical fiber analysis data corresponding to the optical fiber monitoring points.

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 the processor, causes the processor to perform the fiber condition monitoring and early warning method of 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 and early warning 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 and early warning method according to any one 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

1. The optical fiber state monitoring and early warning method is characterized by comprising the following steps of:

2. The optical fiber state monitoring and early warning method according to claim 1, wherein the optical fiber data acquisition device comprises an optical fiber grating data acquisition module, a distributed optical fiber data acquisition module, an environment and dynamic strain monitoring module, an optical fiber frequency acquisition module and a plurality of sensing probes; the step of responding to the received triggering information and calling a plurality of optical fiber data acquisition devices corresponding to the optical fiber to be detected to respectively acquire various optical fiber monitoring data corresponding to the optical fiber to be detected comprises the following steps:

3. The fiber optic condition monitoring and early warning method of claim 2, wherein the data page component comprises a strain component, a distributed temperature component, an environmental dynamic change component, a fiber optic frequency component and an external wavelength change component; the initial optical fiber monitoring page is provided with a data statistics trigger key, a stress analysis trigger key and a data conversion trigger key; the step of updating the initial optical fiber monitoring page according to the trigger information and the data page component to obtain an intermediate optical fiber monitoring page comprises the following steps:

4. The method for monitoring and early warning of optical fiber state according to claim 3, wherein the step of calling the strain component to perform strain analysis to obtain target strain corresponding to each optical fiber monitoring point comprises the following steps:

5. The method for monitoring and pre-warning optical fiber state according to claim 3, wherein the step of respectively calling the target strain and the external wavelength variation component to perform data conversion to obtain a plurality of optical fiber state data corresponding to the optical fiber monitoring point comprises the following steps:

6. The method for monitoring and early warning of an optical fiber state according to claim 3, wherein the preset structural health assessment model comprises a one-dimensional convolution layer and a long-term and short-term memory network layer; the intermediate optical fiber monitoring page is provided with an early warning analysis trigger key; the step of performing early warning analysis based on the intermediate optical fiber monitoring page through a preset structural health evaluation model and updating the intermediate optical fiber monitoring page to obtain a target optical fiber monitoring page comprises the following steps:

If the early warning analysis triggering key is triggered, extracting time sequence characteristics of optical fiber state data corresponding to each optical fiber monitoring point through the one-dimensional convolution layer respectively to obtain initial optical fiber analysis data corresponding to the optical fiber monitoring point;

7. The method for monitoring and early warning the optical fiber state according to claim 6, wherein the preset alarm threshold comprises a strain threshold, a crack threshold, a deflection threshold and a safety early warning threshold; the step of obtaining target optical fiber analysis data corresponding to the optical fiber monitoring point according to the intermediate optical fiber analysis data and a preset alarm threshold value comprises the following steps:

and comparing the strain alarm data, the fission alarm data and the deflection alarm data with the corresponding safety early warning threshold values respectively to obtain target optical fiber analysis data corresponding to the optical fiber monitoring points.

8. An optical fiber state monitoring and early warning system, comprising:

the initial optical fiber monitoring page generation module is used for loading corresponding data page components by adopting the optical fiber monitoring data respectively and rendering all the data page components to generate an initial optical fiber monitoring page;

The intermediate optical fiber monitoring page obtaining module is used for updating the initial optical fiber monitoring page according to the trigger information and the data page component to obtain an intermediate optical fiber monitoring page;

the target optical fiber monitoring page obtaining module is used for carrying out early warning analysis based on the intermediate optical fiber monitoring page through a preset structural health evaluation model and updating the intermediate optical fiber monitoring page to obtain the target optical fiber monitoring page.

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 and early warning method of any one of claims 1-7.

10. A computer readable storage medium having stored thereon a computer program, wherein the computer program when executed implements the fiber optic condition monitoring and early warning method of any one of claims 1-7.