CN103873140B - A kind of restorative procedure of the optical fiber sensing network based on ring topology - Google Patents
A kind of restorative procedure of the optical fiber sensing network based on ring topology Download PDFInfo
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- CN103873140B CN103873140B CN201410096718.5A CN201410096718A CN103873140B CN 103873140 B CN103873140 B CN 103873140B CN 201410096718 A CN201410096718 A CN 201410096718A CN 103873140 B CN103873140 B CN 103873140B
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Abstract
The invention discloses a kind of restorative procedure of the optical fiber sensing network based on ring topology, the method is based on the optical fiber sensing network comprising fiber Bragg grating (FBG) demodulator and at least two ring sub-network, wherein each ring sub-network all comprises the first optical path switcher, second optical path switcher and M FBG transducer, during reparation, first the position occurring link failure in optical fiber sensing network is judged, then set up after there is link failure for representing the adjacent element chained list of optical fiber sensing network structure, then the demodulation paths of each FBG transducer is obtained according to SPFA algorithm, finally, calculate the toggle path of optical path switcher, and according to toggle path, optical path switcher corresponding in optical fiber sensing network is switched.The present invention can make influenced in optical fiber sensing network but the FBG transducer that function is intact obtains demodulation to greatest extent, realizes the selfreparing of optical fiber sensing network, improves the reliability of whole optical fiber sensing network.
Description
Technical field
The present invention relates to computer communication field, particularly relate to a kind of restorative procedure of the optical fiber sensing network based on ring topology.
Background technology
The function of, labyrinth as large-scale in aerospace vehicle, bridge tunnel, civil engineering etc. in modern project field and environment for use become more diverse and complicated.In the external environment of complexity, the disguise of structure institute damaged is strong, damage, failure mechanism complexity, and type of impairment and degree are difficult to judge, causes becoming particularly complicated, the increase that required number of sensors is also a large amount of to the health monitoring of structure.FBG transducer has that quality is light, diameter is thin, the transmission of corrosion-resistant, collection signal be sensed as one, be convenient to build the advantages such as distributed sensor, anti-electromagnetic interference capability are strong, be used widely in the health monitoring of Intelligent material structure.If arrange FBG transducer at aerospace vehicle, the isostructural key position of bridge tunnel, just Real-Time Monitoring can be carried out to physical quantitys such as the strain of structure, stress, temperature.The U.S. obtains Boeing on the wing cover of Boeing 787, arranges hundreds of FBG transducers, carries out Real-Time Monitoring to wing fatigue, distribution of force and structural damage; 1999,120 fiber-optic grating sensors were arranged on a steel structure bridge of New Mexico LasCruces10 interstate highway by US Naval Research Laboratory, monitor with the health status realizing stress, temperature and structure to bridge structure; 2000, the vibration that Canada arranges altogether under pressure, temperature, traffic loading and the wind action that 740 transducers bear bridge pier column on Confederation bridge was monitored; At home, Wuhan University of Technology arranged 200 fiber-optic grating sensors nearly in 2002 on the cold lunch box bridge in Guizhou, monitored the strain in its construction and use procedure, temperature and amount of deflection etc.
That applies in intellectual structure health monitoring system engineering along with FBG transducer increases, and its network reliability has caused the extensive concern of people.Optical fiber sensing network is as the element of intelligent structure health monitoring, and Main Function has been the collection to intelligent structure state parameter, and its functional reliability is most important to whole monitoring system.When there is link failure in optical fiber sensing network, system can not accurate acquisition Monitoring Data, if do not repair link failure, then can produce certain impact to the evaluation result of monitoring structural health conditions, even make monitoring system produce wrong report to the health status of structure and fail to report.
Due to increasing of FBG number of sensors in optical fiber sensing network on large-scale, labyrinth, add that FBG transducer is pasted onto the surface of structure more or imbeds in structure, as repaired or change its network, will make a big impact to structure.Therefore the reliability of optical fiber sensing network is improved, still can normally work when making network itself occur link failure, for the useful life extending intellectual structure health monitoring system, the probability reducing intellectual structure health monitoring system cost and accident generation is significant.
Summary of the invention
Technical problem to be solved by this invention is the deficiency existed for the optical fiber sensing network reliability mentioned, and provides a kind of restorative procedure of the optical fiber sensing network based on ring topology.
The present invention is for solving the problems of the technologies described above by the following technical solutions:
Based on a restorative procedure for the optical fiber sensing network of ring topology, described optical fiber sensing network comprises fiber Bragg grating (FBG) demodulator and at least two ring sub-network;
Each ring sub-network all comprises the first optical path switcher, the second optical path switcher and M FBG transducer, wherein M be more than or equal to 2 integer, connect after M FBG transducer is divided into two groups, if M is even number, the number of two groups of FBG transducers is M/2, if M is odd number, the number of one group of FBG transducer is (M+1)/2, the number of another group FBG transducer is (M-1)/2, and equal one end of FBG transducer of two groups of series connection is connected with the first optical path switcher, the other end is connected with the second optical path switcher;
First optical path switcher of each ring sub-network is all connected with fiber Bragg grating (FBG) demodulator;
Second optical path switcher series connection of each ring sub-network;
The restorative procedure of the described optical fiber sensing network based on ring topology comprises following steps:
Step 1), utilizes fiber Bragg grating (FBG) demodulator to gather the transducing signal of FBG transducer in optical fiber sensing network;
Step 2), according to the performance degradation rule of FBG transducer, failure mechanism and the decay model of damage to transducing signal, trend curve, clustering method are adopted to the transducing signal gathered in step 1), judges the position occurring link failure in optical fiber sensing network;
Step 3), sets up after there is link failure for representing the adjacent element chained list of optical fiber sensing network structure;
Step 4), according to adjacent element chained list and SPFA algorithm, calculates the demodulation paths between each FBG transducer to fiber Bragg grating (FBG) demodulator;
Step 5), calculates the toggle path of optical path switcher in optical fiber sensing network, and switches optical path switcher corresponding in optical fiber sensing network according to toggle path, makes influenced but the FBG transducer that function is intact obtains demodulation again.
As the further prioritization scheme of restorative procedure of a kind of optical fiber sensing network based on ring topology of the present invention, the concrete steps calculating the toggle path of optical path switcher in demodulation paths between each FBG transducer to fiber Bragg grating (FBG) demodulator and optical fiber sensing network in step 4) are as follows:
Step 4.1), by the specific light loss of the light source light power of grating demodulation instrument divided by optical path switcher, draw the maximum optical path switch number that can comprise in demodulation paths;
Step 4.2), by adjacent element chained list and SPFA algorithm, calculate all possible demodulation paths of each FBG transducer;
Step 4.3), screen out the demodulation paths that all optical path switcher numbers are greater than maximum optical path switch number;
Step 4.4), for each FBG transducer, in remaining demodulation paths, the demodulation paths selecting length the shortest is as its demodulation paths.
As the further prioritization scheme of restorative procedure of a kind of optical fiber sensing network based on ring topology of the present invention, in described ring sub-network, the quantity of FBG transducer can be identical, also can be different.
The present invention adopts above technical scheme compared with prior art, has following technique effect:
The present invention is directed to the link failure occurred in optical fiber sensing network, set up after there is link failure for representing the adjacent element chained list of optical fiber sensing network structure, then the toggle path of demodulation paths between each FBG transducer to fiber Bragg grating (FBG) demodulator and optical path switcher is obtained according to SPFA algorithm, and according to toggle path, optical path switcher corresponding in optical fiber sensing network is switched, make influenced in optical fiber sensing network but the FBG transducer that function is intact obtains demodulation to greatest extent, realize the selfreparing of optical fiber sensing network, the reliability of the whole optical fiber sensing network of final raising.
Accompanying drawing explanation
Fig. 1 is the optical fiber sensing network figure of ring topology;
Fig. 2 is optical fiber sensing network link failure figure;
Fig. 3 is optical fiber sensing network link failure reduced graph;
Fig. 4 is the adjacent element chained list corresponding to link failure;
Fig. 5 is the demodulation paths corresponding to FBG transducer 1,2,3,4,7,13,14,15,16,17,18;
Fig. 6 is the demodulation paths corresponding to FBG transducer 5,6,9,11,12;
Fig. 7 is the demodulation paths corresponding to FBG transducer 10.
Embodiment
Below in conjunction with accompanying drawing, technical scheme of the present invention is described in further detail:
Optical fiber sensing network of the present invention comprises fiber Bragg grating (FBG) demodulator and at least two parallel ring sub-network;
Each ring sub-network all comprises the first optical path switcher, the second optical path switcher and M FBG transducer, wherein M be more than or equal to 2 integer, connect after M FBG transducer is divided into two groups, if M is even number, the number of two groups of FBG transducers is M/2, if M is odd number, the number of one group of FBG transducer is (M+1)/2, the number of another group FBG transducer is (M-1)/2, and equal one end of FBG transducer of described two groups of series connection is connected with the first optical path switcher, the other end is connected with the second optical path switcher;
First optical path switcher of each ring sub-network is all connected with fiber Bragg grating (FBG) demodulator;
Second optical path switcher series connection of each ring sub-network;
With three parallel ring sub-network, M=6 is example, sets up the optical fiber sensing network of ring topology as shown in Figure 1.Wherein
λ ij represent
iin individual ring sub-network from the left side
jindividual FBG transducer, the FBG transducer number consecutively of sensor number from first ring sub-network left side.
Restorative procedure based on the optical fiber sensing network of ring topology comprises following steps:
Step 1), utilizes fiber Bragg grating (FBG) demodulator to gather the transducing signal of FBG transducer in optical fiber sensing network.
Step 2), according to the performance degradation rule of FBG transducer, failure mechanism and the decay model of damage to transducing signal, trend curve, clustering method are adopted to the transducing signal gathered in step 1), judges the position occurring link failure in optical fiber sensing network.
Suppose to judge that the optical fiber sensing network of ring topology produces link failure as shown in Figure 2.Optical path switcher initial condition
k 1=
k 3=
k 5=
k 7=
k 9=
k 11=1, fiber Bragg grating (FBG) demodulator can only obtain the transducing signal of FBG transducer (1,2,3,4,7,13,14,15,16,17,18), other FBG transducers (5,6,8,9,10,11,12) signal can not demodulation.。
The optical fiber sensing network link failure reduced graph of accompanying drawing 3 respective figure 2.In figure
k i (
i=1 ~ 12) state of corresponding optical path switcher is represented,
k i =1 represents that respective optical path is connected,
k i =0 represents that respective optical path disconnects.
k 1~
k 8,
k 11,
k 12the switching state of corresponding five 1 × 2 optical path switchers,
k 9,
k 10the switching state of corresponding 2 × 2 optical path switchers.According to the characteristic of optical path switcher, when
k 1when=1
k 2=0,
k 1when=0
k 2=1.
k 3,
k 4,
k 5,
k 6,
k 7,
k 8,
k 9,
k 10,
k 11,
k 12in like manner.
Step 3), sets up after there is link failure for representing the adjacent element chained list of optical fiber sensing network structure.
3 set up adjacent element chained list as shown in Figure 4 with reference to the accompanying drawings.
The concrete steps setting up adjacent element chained list are as follows:
Step 3.1), set up one for storing the gauge outfit element array of gauge outfit element information;
Step 3.2), set up the adjacent element node chained list of each gauge outfit element, wherein each element node has three territories: the sequence number of summit domain representation element; Chain territory is in order to point to the next element adjacent with gauge outfit element; Switch the switching state of optical path switcher between domain representation gauge outfit element and adjacent element.If not adjacent with gauge outfit element element, then pointer is empty, represents with " ∧ ";
Step 3.3), the adjacent element node chained list of each gauge outfit element and this element in gauge outfit element array is coupled together, obtains the adjacent element chained list of whole topological structure.
Step 4), according to adjacent element chained list and SPFA algorithm, calculates the demodulation paths between each FBG transducer to fiber Bragg grating (FBG) demodulator.
SPFA algorithm idea safeguards with a queue.Time initial, gauge outfit element is added queue, from queue, take out an element at every turn, and all elements adjacent with it are relaxed.If certain adjacent element relaxes successfully, then joined the team.Repeat such process until queue is for empty.
The concrete steps calculating the toggle path of optical path switcher in demodulation paths between each FBG transducer to fiber Bragg grating (FBG) demodulator and optical fiber sensing network are as follows:
Step 4.1), by the specific light loss of the light source light power of grating demodulation instrument divided by optical path switcher, draw the maximum optical path switch number that can comprise in demodulation paths;
Step 4.2), by adjacent element chained list and SPFA algorithm, calculate all possible demodulation paths of each FBG transducer;
Step 4.3), screen out the demodulation paths that all optical path switcher numbers are greater than maximum optical path switch number;
Step 4.4), for each FBG transducer, in remaining demodulation paths, the demodulation paths selecting length the shortest is as its demodulation paths.
Step 5), calculates the toggle path of optical path switcher in optical fiber sensing network, and switches optical path switcher corresponding in optical fiber sensing network according to toggle path, makes influenced but the FBG transducer that function is intact obtains demodulation again.
According to the restoration information that step 4) obtains, switch corresponding optical path switcher in optical fiber sensing network, can FBG5, FBG6, FBG9 be regained
-the transducing signal of FBG12, but the transducing signal of FBG8 cannot obtain demodulation by any path, and concrete repair path is as shown in accompanying drawing 5,6,7.By the restorative procedure of the optical fiber sensing network based on ring topology, make influenced in optical fiber sensing network but the FBG transducer that function is intact obtains demodulation to greatest extent, thus reduce link failure as far as possible to the impact of whole optical fiber sensing network, realize the selfreparing of optical fiber sensing network ring topology, the final reliability improving whole optical fiber sensing network.
The above; it is only the implementation example of the inventive method; not the present invention is imposed any restrictions, everyly replace all still belonging in the protection range of the technology of the present invention system to the change of any simple amendment made for any of the above embodiments, structure according to technical solution of the present invention.
Claims (5)
1. based on a restorative procedure for the optical fiber sensing network of ring topology, it is characterized in that, described optical fiber sensing network comprises fiber Bragg grating (FBG) demodulator and at least two ring sub-network;
Each ring sub-network all comprises the first optical path switcher, the second optical path switcher and M FBG transducer, wherein M be more than or equal to 2 integer, connect after M FBG transducer is divided into two groups, if M is even number, the number of two groups of FBG transducers is M/2, if M is odd number, the number of one group of FBG transducer is (M+1)/2, the number of another group FBG transducer is (M-1)/2, and equal one end of FBG transducer of two groups of series connection is connected with the first optical path switcher, the other end is connected with the second optical path switcher;
First optical path switcher of each ring sub-network is all connected with fiber Bragg grating (FBG) demodulator;
Second optical path switcher series connection of each ring sub-network;
The restorative procedure of the described optical fiber sensing network based on ring topology comprises following steps:
Step 1), utilizes fiber Bragg grating (FBG) demodulator to gather the transducing signal of FBG transducer in optical fiber sensing network;
Step 2), according to the performance degradation rule of FBG transducer, failure mechanism and the decay model of damage to transducing signal, trend curve, clustering method are adopted to the transducing signal gathered in step 1), judges the position occurring link failure in optical fiber sensing network;
Step 3), sets up after there is link failure for representing the adjacent element chained list of optical fiber sensing network structure;
Step 4), according to adjacent element chained list and SPFA algorithm, calculates the demodulation paths between each FBG transducer to fiber Bragg grating (FBG) demodulator;
Step 5), calculates the toggle path of optical path switcher in optical fiber sensing network, and switches optical path switcher corresponding in optical fiber sensing network according to toggle path, makes influenced but the FBG transducer that function is intact obtains demodulation again.
2. the restorative procedure of the optical fiber sensing network based on ring topology according to claim 1, is characterized in that, the concrete steps calculating the demodulation paths between each FBG transducer to fiber Bragg grating (FBG) demodulator in step 4) are as follows:
Step 4.1), by the specific light loss of the light source light power of grating demodulation instrument divided by optical path switcher, draw the maximum optical path switch number that can comprise in demodulation paths;
Step 4.2), by adjacent element chained list and SPFA algorithm, calculate all possible demodulation paths of each FBG transducer;
Step 4.3), screen out the demodulation paths that all optical path switcher numbers are greater than maximum optical path switch number;
Step 4.4), for each FBG transducer, in remaining demodulation paths, the demodulation paths selecting length the shortest is as its demodulation paths.
3. the restorative procedure of the optical fiber sensing network based on ring topology according to claim 1, is characterized in that, in described ring sub-network, the quantity of FBG transducer is identical.
4. the restorative procedure of the optical fiber sensing network based on ring topology according to right 1, is characterized in that, in described ring sub-network, the quantity of FBG transducer is different.
5. the restorative procedure of the optical fiber sensing network based on ring topology according to claim 1, is characterized in that, in described step 3), the construction method of adjacent element chained list is as follows:
Step 3.1), set up the gauge outfit element array for storing gauge outfit element information;
Step 3.2), set up the adjacent element node chained list of each gauge outfit element, wherein each element node has three territories: territory, summit, chain territory and switching territory;
The sequence number of described summit domain representation element;
Described chain territory is in order to point to the next element adjacent with gauge outfit element;
The switching state of optical path switcher between described switching domain representation gauge outfit element and adjacent element;
Step 3.3), the adjacent element node chained list of each gauge outfit element and this element in gauge outfit element array is coupled together, obtains the adjacent element chained list of topological structure.
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| CN109743103B (en) * | 2019-02-01 | 2021-07-27 | 福州大学 | FBG sensing network node fault repairing method based on ELM |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6212306B1 (en) * | 1999-10-07 | 2001-04-03 | David J. F. Cooper | Method and device for time domain demultiplexing of serial fiber Bragg grating sensor arrays |
| CN102183267A (en) * | 2011-03-11 | 2011-09-14 | 江苏联通电缆有限公司 | Fiber Bragg grating sensing system |
| CN202033010U (en) * | 2011-03-23 | 2011-11-09 | 东南大学 | Distributed optical fiber sensor used for simultaneously monitoring engineering structure integral and local strains |
| CN103454014A (en) * | 2012-05-31 | 2013-12-18 | 基德科技公司 | Optical fiber sensing system |
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| CN101476879B (en) * | 2009-01-23 | 2010-07-21 | 南京航空航天大学 | Self-repairing system and method for optical fibre distribution type sensor network |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6212306B1 (en) * | 1999-10-07 | 2001-04-03 | David J. F. Cooper | Method and device for time domain demultiplexing of serial fiber Bragg grating sensor arrays |
| CN102183267A (en) * | 2011-03-11 | 2011-09-14 | 江苏联通电缆有限公司 | Fiber Bragg grating sensing system |
| CN202033010U (en) * | 2011-03-23 | 2011-11-09 | 东南大学 | Distributed optical fiber sensor used for simultaneously monitoring engineering structure integral and local strains |
| CN103454014A (en) * | 2012-05-31 | 2013-12-18 | 基德科技公司 | Optical fiber sensing system |
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