CN105783948A - FBG sensor system based on cooperation of multiple sensing modules - Google Patents
FBG sensor system based on cooperation of multiple sensing modules Download PDFInfo
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
- G01D5/26—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light
- G01D5/268—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light using optical fibres
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W84/00—Network topologies
- H04W84/18—Self-organising networks, e.g. ad-hoc networks or sensor networks
Abstract
The invention provides an FBG sensor system based on cooperation of multiple sensing modules, which comprises a broadband light source, a coupler, a 1*N optical switch, a demodulator, a computer and a sensing network, wherein the sensing network comprises multiple FBG sensing modules and multiple 2*2 optical switches, the FBG sensing modules are connected by using sensing fibers, each FBG sensing module is composed of a 1*2 optical switch and an FBG linear array, and the FBG linear array comprises multiple FBG sensors, the FBG linear array comprises two sensing branches, front ends of the two sensing branches are respectively connected with the 1*2 optical switch, and tail ends of the two sensing branches are respectively connected with the 2*2 optical switches. By using the combined use of the optical switches and the cooperation of the multiple sensing modules, according to feedback of the sensing network, the problem of multiple fault points in the sensor network can be solved, a computer can receive as many FBG signals as possible, and the reliability of the sensing network can be effectively improved.
Description
Technical field
The present invention relates to sensing network system, particularly to a kind of FBG sensor-based system cooperated based on many sensing modules.
Background technology
Generally, in engineer applied, FBG network is widely used in the fields such as bridge, pipeline, space flight.In practical application, if fault can be there is in sensor fibre, it will cause the signal of the intact FBG of part in network can not be received by computer.In the face of day by day complicated FBG network, the reliability improving system becomes more and more important." a kind of jumbo self-healing optical fiber sensor network " that patent CN101917230A proposes utilizes photoswitch by simply in parallel with standby sensing branch road for sensing branch road, solve the problem of single trouble point on sensing branch road, can solve to a certain extent to break down the problem that can not be arrived by COMPUTER DETECTION of FBG produced due to sensor fibre, but the sensing problem that on sensing branch road, multiple trouble points or standby sensing branch road break down can not be solved, namely the more effective sensing network design of one is needed so that sensing network reliability is higher.
Accordingly, it would be desirable to one can solve the problems referred to above by sensor effectively.
Summary of the invention
It is an object of the invention to provide a kind of FBG sensor-based system cooperated based on many sensing modules to include: wideband light source, bonder, 1 × N photoswitch, (FBG) demodulator, computer and sensing network, wherein, described wideband light source connects described bonder, described bonder connects described sensing network by described 1 × N photoswitch, described sensing network includes multiple FBG sensing module and multiple 2 × 2 photoswitches, described FBG sensing module front end adopts sensor fibre to be connected with described 1 × N photoswitch, described FBG sensing module is made up of 21 × 2 photoswitches and 2 FBG linear array, described 11 × 2 photoswitch and described 1 FBG linear array series connection form series connection bundle, described another 11 × 2 photoswitch is connected with another 1 FBG linear array bundle；2 described series connection Shu Binglian form described FBG sensing module；Described FBG linear array includes 2 sensing branch roads, multiple FBG that described every sensing branch road is connected, and the front end of described 2 sensing branch roads connects described 1 × 2 photoswitch respectively, and the end of described 2 sensing branch roads connects described 2 × 2 photoswitches；After the light of described wideband light source output passes through described 1 × N photoswitch after described bonder, a part of light carries out sensing through described 1 × N photoswitch and expands number, reflection light is received by described (FBG) demodulator, after process, sensing data analyzes and processes on described computer, if sensor fibre breaks down, then described computer does not just receive the data that operative sensor returns, according to sensor feedback information, computer controls the switching of optical switch status, when sensing network breaks down, by 1 × 2 photoswitch described in comprehensive adjustment and described 2 × 2 photoswitches, select other sensory path, recover the sensing function of described sensing system.
Preferably, described the gone here and there number of sensors of FBG sensing module is determined by wideband light source wavelength band.
Preferably, described FBG sensing module includes 2 groups of FBG linear array, a respectively FBG linear array and the 2nd FBG linear array, a described FBG linear array includes the first sensing branch road and the second sensing branch road, and described 2nd FBG linear array includes the 3rd sensing branch road and the 4th sensing branch road.
Preferably, break down inside described sensing module, described computer sends instruction and controls the driving of described photoswitch, control optical switch status, making described 2 × 2 photoswitches keep original state, described 2 group of 1 × 2 photoswitch uninterruptedly senses switching between branch road and described second sensing branch road and described 3rd sensing branch road and described 4th sensing branch road described first.
Preferably, breaking down between described sensing module, described computer sends instruction and controls 2 × 2 photoswitch switching states, senses branch road and described 3rd sensing branch road by described first, described second sensing branch road and described 4th sensing branch road interconnection, constitute path with two group of 1 × 2 photoswitch respectively.
Should be appreciated that aforementioned description substantially is exemplary illustration and explanation with follow-up detailed description, the restriction to the claimed content of the present invention should not be used as.
Accompanying drawing explanation
With reference to the accompanying drawing enclosed, the more purpose of the present invention, function and advantage will be illustrated by the described below of embodiment of the present invention, wherein:
Fig. 1 illustrates the structural representation of a kind of FBG system cooperated based on many sensing modules.
Fig. 2 illustrates the structural representation of FBG sensing module.
Fig. 3 illustrates the normal operation schematic diagram of neighboring sensor module.
Fig. 4 illustrates the interior principle schematic each solving failure problems of sensing module of the FBG sensor-based system of the present invention.
Fig. 5 illustrates that between the sensing network module of FBG sensor-based system, cooperation solves the principle schematic of failure problems.
The FBG sensing module layout optimization figure based on the cooperation of many sensing units body that the present invention that illustrates Fig. 6 designs.
Detailed description of the invention
To be illustrated by reference one exemplary embodiment, the purpose of the present invention and function and the method for realizing these purposes and function.But, the present invention is not limited to one exemplary embodiment disclosed below；By multi-form, it can be realized.The essence of description is only the detail helping the various equivalent modifications Integrated Understanding present invention.
Hereinafter, embodiments of the invention will be described with reference to the drawings.In the accompanying drawings, identical accompanying drawing labelling represents same or similar parts or same or similar step.
Fig. 1 illustrates the structural representation of a kind of FBG system cooperated based on many sensing modules.As it is shown in figure 1,
A kind of FBG system 100 cooperated based on many sensing modules, described sensing system includes: wideband light source 110, bonder 120,1 × N photoswitch 130, (FBG) demodulator 140, computer 150 and sensing network 160,
nullWherein，Described wideband light source 110 connects described bonder 120，Described bonder 120 connects described sensing network 160 by described 1 × N photoswitch 130，Described sensing network 160 includes multiple FBG sensing module 161 and multiple 2 × 2 photoswitches 162，Described FBG sensing module 161 front end adopts sensor fibre to be connected with described 1 × N photoswitch 130，Described FBG sensing module 161 is made up of 21 × 2 photoswitch 161a and 2 FBG linear array 161b，Described 11 × 2 photoswitch 161a and described 1 FBG linear array 161b series connection form series connection bundle，Described another 11 × 2 photoswitch 161a and another 1 FBG linear array 161b connects and forms series connection bundle，2 described series connection Shu Binglian form described FBG sensing module.
Described FBG linear array 161b includes 2 sensing branch roads 201, described every sensing branch road 201 is connected multiple FBG 202, the front end of described 2 sensing branch roads 201 connects described 1 × 2 photoswitch 161a respectively, and the end of described 2 sensing branch roads 201 connects described 2 × 2 photoswitches 162.
After the light of described wideband light source 110 output passes through described 1 × N photoswitch 130 after described bonder 120, a part of light carries out sensing through described 1 × N photoswitch 130 and expands number, reflection light is received by described (FBG) demodulator 140, after process, sensing data analyzes and processes on described computer 150, if sensor fibre breaks down, then described computer does not just receive the data that operative sensor returns, according to sensor feedback information, computer controls the switching of optical switch status, when sensing network 160 breaks down, by 1 × 2 photoswitch 161a described in comprehensive adjustment and described 2 × 2 photoswitches 162, select other sensory path, recover the sensing function of described sensing system.
Fig. 2 illustrates the structural representation of FBG sensing module.As in figure 2 it is shown,
The FBG sensing module 161 of the present invention is made up of 1 × 2 photoswitch 161a and FBG linear array 161b, FBG linear array 161b includes 2 sensing branch roads 201, respectively the first sensing branch road 201a and the second sensing branch road 201b, first sensing branch road 201a and the second senses multiple FBG 202 of connecting respectively on branch road 201b, and institute's string sensor 202 number is determined by wideband light source wavelength band.
Fig. 3 illustrates the normal operation schematic diagram of neighboring sensor module.As it is shown on figure 3,
nullFig. 3 includes 2 groups of FBG linear array 161b、21 × 2 photoswitch 161a and 12 × 2 photoswitch 162，2 groups of FBG linear array 161b respectively FBG linear array 301 and the 2nd FBG linear array 302，Oneth FBG linear array 301 includes the first sensing branch road 201a and the second sensing branch road 201b，2nd FBG linear array 302 includes the 3rd sensing branch road 201c and the four and senses branch road 201d，Under normal operating conditions，21 × 2 photoswitch 161a UNICOMs respectively first sense branch road 201a and the three and sense branch road 201c，2 × 2 photoswitches 162 are in state one，Namely the first sensing branch road 201a and the second sensing branch road 201b it is respectively communicated with、3rd sensing branch road 201c and the four senses branch road 201d.
Fig. 4 illustrates the interior principle schematic each solving failure problems of sensing module of the FBG sensor-based system of the present invention.As shown in Figure 4,
In figure, dotted line is sensing operating path, × for trouble point, figure includes 4 sensing branch roads 201, and respectively the first sensing branch road 201a and the second sensing branch road 201b, the 3rd sensing branch road 201c and the four sense branch road 201d.4 FBG of series connection on every sensing branch road 201, series connection 4 FBG 202, respectively FBG11 (202a), FBG12 (202b), FBG13 (202c) and FBG14 (202d) on first sensing branch road 201a；Series connection 4 FBG 202, respectively FBG21 (202e), FBG22 (202f), FBG23 (202g) and FBG24 (202h) on second sensing branch road 201b；Series connection 4 FBG 202, respectively FBG31 (202i), FBG32 (202j), FBG33 (202k) and FBG34 (202l) on 3rd sensing branch road 201c；Series connection 4 FBG 202, respectively FBG41 (202m), FBG42 (202n), FBG43 (202o) and FBG44 (202p) on 4th sensing branch road 201d.nullTime breaking down in FBG sensing module 161 inside，In sensing branch road 201, trouble point state is as shown in Figure 4，When two 1 × 2 photoswitch 161a on off states are constant，System only has FBG11 (202a)、FBG31(202i)、FBG32(202j)、FBG33(202k)、FBG34 (202l) and FBG44 (202p) totally 6 sensor 202 normal operation，Functional reliability only has the 75% of original system，The data that this computer-chronograph returns according to (FBG) demodulator，May determine that sensor has part can not be detected by computer 150，Then computer 150 sends instruction control photoswitch driving，And then control on off state，2 × 2 photoswitches 162 are made to keep original state constant，And two group of 1 × 2 photoswitch 161a senses first incessantly and quickly switches between branch road 201a and the second sensing branch road 201b and the three sensing branch road 201c and the four sensing branch road 201d，Thus can so that COMPUTER DETECTION be to whole FBG signals，Sensing reliability improves 25%.
Coordination handling failure state, when FBG sensing branch road has multiple trouble point, can not solve by single module, and now needing cooperates with each other between many sensing modules senses.Our general's embodiment below of concrete solution elaborates.
Fig. 5 illustrates that between the sensing network module of FBG sensor-based system, cooperation solves the principle schematic of failure problems.As it is shown in figure 5,
In figure, dotted line is sensing operating path, × for trouble point, figure includes 4 sensing branch roads 201, and respectively the first sensing branch road 201a and the second sensing branch road 201b, the 3rd sensing branch road 201c and the four sense branch road 201d.4 FBG of series connection on every sensing branch road 201, series connection 4 FBG 202, respectively FBG11 (202a), FBG12 (202b), FBG13 (202c) and FBG14 (202d) on first sensing branch road 201a；Series connection 4 FBG 202, respectively FBG21 (202e), FBG22 (202f), FBG23 (202g) and FBG24 (202h) on second sensing branch road 201b；Series connection 4 FBG 202, respectively FBG31 (202i), FBG32 (202j), FBG33 (202k) and FBG34 (202l) on 3rd sensing branch road 201c；Series connection 4 FBG 202, respectively FBG41 (202m), FBG42 (202n), FBG43 (202o) and FBG44 (202p) on 4th sensing branch road 201d.nullWhen malfunction as shown in Figure 5 time，If all optical switch status are held in FBG sensing network normal operation，It is only able to detect FBG11 (202a)、FBG31(202i)、FBG32(202j)、FBG33(202k)、FBG34(202l)、FBG41(202m)、FBG42(202n)、FBG43 (202o) and FBG44 (202p) totally 9 sensors 202，Sensor-based system reliability only has the 56.25% of original system，Can be seen that reliability is very poor，If now processing merely with module self，Then sensor FBG21 (202e) detected again more，Sensor-based system reliability is the 62.5% of original system，Although improve 6.25%，But reliability is still very poor.FBG sensor-based system through many sensing modules cooperation of present invention design, what can not be subject to this malfunction completely affects normal operation, if all FBG 202 are all intact, then computer can detect whole FBG signal, reliability will improve half level nearly, and high degree improves system reliability.
nullSpecific works process is，According to the feedback of sensing network, computer 150 judges that duty is shown in Fig. 5，Then control 2 × 2 photoswitch 162 that sends instructions down switches state，Sense branch road 201a and the three by first and sense branch road 201c、Second sensing branch road 201b and the four senses branch road 201d interconnection，Path is constituted respectively with two group of 1 × 2 photoswitch 161a，Under not changing two group of 1 × 2 photoswitch 161a state，Namely the first sensing branch road 201a and the three is selected to sense branch road 201c respectively，This computer-chronograph can detect FBG11 (202a)、FBG12(202b)、FBG13(202c)、FBG14(202d)、FBG31(202i)、FBG32(202j)、FBG33 (202k) and FBG34 (202l) totally 8 sensors，Then change two group of 1 × 2 photoswitch 161a state simultaneously，Namely the second sensing branch road 201b and the four is selected to sense branch road 201d，This computer-chronograph can detect other 8 sensors，I.e. FBG21 (202e)、FBG22(202f)、FBG23(202g)、FBG24(202h)、FBG41(202m)、FBG42(202n)、FBG43 (202o) and FBG44 (202p)，By constantly switching two group of 1 × 2 photoswitch this mode of 161a state，Whole FBG signal just can be detected，Make sensor-based system relatively reliable.
The FBG sensing module layout optimization figure based on the cooperation of many sensing units body that the present invention that illustrates Fig. 6 designs.As shown in Figure 6,
The FBG system cooperated based on many sensing modules of the present invention includes multiple FBG sensing module 161 and multiple 2 × 2 photoswitches 162, here FBG sensing module quantity is unrestricted, can be optimized according to demand, the effective reliability improving sensing network.
Advantages of the present invention at least that:
The present invention utilizes the combination of photoswitch to use the cooperation principle with many sensing modules, feedback according to sensing network, the multiple faults point problem in sensor network can be solved so that computer receives FBG signal as much as possible, is effectively improved the reliability of sensing network.
In conjunction with explanation and the practice of the present invention disclosed here, other embodiments of the present invention are all easy to expect and understand for those skilled in the art.Illustrating and embodiment is regarded only as and is illustrative of, true scope and the purport of the present invention are all defined in the claims.
Claims (5)
1. the FBG system cooperated based on many sensing modules, described sensing system includes: wideband light source, bonder, 1 × N photoswitch, (FBG) demodulator, computer and sensing network,
Wherein, described wideband light source connects described bonder, described bonder connects described sensing network by described 1 × N photoswitch, described sensing network includes multiple FBG sensing module and multiple 2 × 2 photoswitches, described FBG sensing module front end adopts sensor fibre to be connected with described 1 × N photoswitch, described FBG sensing module is made up of 21 × 2 photoswitches and 2 FBG linear array, described 11 × 2 photoswitch and the series connection of described 1 FBG linear array form series connection bundle, and described another 11 × 2 photoswitch is connected with another 1 FBG linear array bundle；2 described series connection Shu Binglian form described FBG sensing module；Described FBG linear array includes 2 sensing branch roads, multiple FBG that described every sensing branch road is connected, and the front end of described 2 sensing branch roads connects described 1 × 2 photoswitch respectively, and the end of described 2 sensing branch roads connects described 2 × 2 photoswitches；
After the light of described wideband light source output passes through described 1 × N photoswitch after described bonder, a part of light carries out sensing through described 1 × N photoswitch and expands number, reflection light is received by described (FBG) demodulator, after process, sensing data analyzes and processes on described computer, if sensor fibre breaks down, then described computer does not just receive the data that operative sensor returns, according to sensor feedback information, computer controls the switching of optical switch status, when sensing network breaks down, by 1 × 2 photoswitch described in comprehensive adjustment and described 2 × 2 photoswitches, select other sensory path, recover the sensing function of described sensing system.
2. the FBG system cooperated based on many sensing modules according to claim 1, wherein, described the gone here and there number of sensors of FBG sensing module is determined by wideband light source wavelength band.
3. the FBG system cooperated based on many sensing modules according to claim 1, wherein, described FBG sensing module includes 2 groups of FBG linear array, a respectively FBG linear array and the 2nd FBG linear array, a described FBG linear array includes the first sensing branch road and the second sensing branch road, and described 2nd FBG linear array includes the 3rd sensing branch road and the 4th sensing branch road.
4. the FBG system cooperated based on many sensing modules according to claim 3, wherein, break down inside described sensing module, described computer sends instruction and controls the driving of described photoswitch, control optical switch status, making described 2 × 2 photoswitches keep original state, described 2 group of 1 × 2 photoswitch uninterruptedly senses switching between branch road and described second sensing branch road and described 3rd sensing branch road and described 4th sensing branch road described first.
5. the FBG system cooperated based on many sensing modules according to claim 3, wherein, break down between described sensing module, described computer sends instruction and controls 2 × 2 photoswitch switching states, branch road and described 3rd sensing branch road is sensed by described first, described second sensing branch road and described 4th sensing branch road interconnection, constitute path with two group of 1 × 2 photoswitch respectively.
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| CN114509113A (en) * | 2022-02-15 | 2022-05-17 | 金陵科技学院 | High-reliability fiber grating sensing network model |
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