CN105467835B - Composite structure damage self-repairing method based on FUZZY ALGORITHMS FOR CONTROL - Google Patents

Composite structure damage self-repairing method based on FUZZY ALGORITHMS FOR CONTROL Download PDF

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CN105467835B
CN105467835B CN201610004480.8A CN201610004480A CN105467835B CN 105467835 B CN105467835 B CN 105467835B CN 201610004480 A CN201610004480 A CN 201610004480A CN 105467835 B CN105467835 B CN 105467835B
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module
light source
liquid
core optical
optical fibre
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CN105467835A (en
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沈令斌
赵志敏
俞晓磊
张文杰
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Nanjing University of Aeronautics and Astronautics
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Nanjing University of Aeronautics and Astronautics
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    • GPHYSICS
    • G05CONTROLLING; REGULATING
    • G05BCONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B13/00Adaptive control systems, i.e. systems automatically adjusting themselves to have a performance which is optimum according to some preassigned criterion
    • G05B13/02Adaptive control systems, i.e. systems automatically adjusting themselves to have a performance which is optimum according to some preassigned criterion electric
    • G05B13/0265Adaptive control systems, i.e. systems automatically adjusting themselves to have a performance which is optimum according to some preassigned criterion electric the criterion being a learning criterion
    • G05B13/0275Adaptive control systems, i.e. systems automatically adjusting themselves to have a performance which is optimum according to some preassigned criterion electric the criterion being a learning criterion using fuzzy logic only

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  • Health & Medical Sciences (AREA)
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  • Evolutionary Computation (AREA)
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  • Automation & Control Theory (AREA)
  • Photometry And Measurement Of Optical Pulse Characteristics (AREA)

Abstract

The present invention discloses a kind of composite structure damage self-repairing system and method based on FUZZY ALGORITHMS FOR CONTROL, and system includes light source module, liquid-core optical fibre intelligence structure module, Photoelectric Detection module, micro controller module, analog-to-digital conversion module, buzzer module, digital display module, relay module;Light source module includes communication light source and repairs light source, and the switch of light source module is connected with relay module;Liquid-core optical fibre intelligence structure module is to be embedded to liquid-core optical fibre in the composite;Photoelectric Detection module includes photoelectric conversion module and signal amplification module, photoelectric conversion module uses phototriode, signal amplification module uses difference amplifier AD626, communication light source and reparation light source are irradiated in one end of liquid-core optical fibre intelligence structure module, the other end connection phototriode of liquid-core optical fibre intelligence structure module;Micro controller module uses general processor AT89S51, and analog-to-digital conversion module uses ADC0809 chips, the IN0 pins of the voltage connection ADC0809 chips of signal amplification module output.

Description

Composite structure damage self-repairing method based on FUZZY ALGORITHMS FOR CONTROL
Technical field:
The present invention relates to a kind of composite structure damage self-repairing system and method based on FUZZY ALGORITHMS FOR CONTROL, its base In optical fiber sensing technology and microcontroller technology and fuzzy control technology, it is related to a kind of physics knot of novel optical fiber sensor Structure, while it is related to a kind of composite structure damage self-repairing method based on FUZZY ALGORITHMS FOR CONTROL, wherein, pass through fuzzy control Method control relay folding so that control communication light source and repair light source in the case where composite material damages and When change, realize composite structure damage self-repairing.
Background technology:
The health monitoring of damage of composite materials is all research hotspot all the time, because the health status of composite material influences It is great, there is deep meaning especially in terms of aerospace cause.Composite structure is widely used to aircraft at present In.Aircraft can inevitably bear various impacts at work, such as:Aerofoil with flying bird shock, be subject to gunslinging, rise and fall during run Influence of the barrier to pulley on road, instrument when safeguarding drop on surface of aircraft etc., and a small damage can Bring fatal disaster.Therefore ensure that the safety of aircraft operation is very necessary by monitoring degree and the position of damage 's.Damage of composite materials positions and the judgement of degree of injury is also into the hot subject of Recent study, also obtains now certainly Many scientific achievement.The function of intelligence structure should include two-part content, and one is self diagnosis and selfreparing.In recent years Come, relatively going deep into for self diagnosis application study of the optical fiber in intelligent composite, also accomplishes tangible results.Exist at present Using preferably at most fiber-optic grating sensor in intelligent composite monitoring system, but fiber grating can only be used as sensing element to supervise The health status of composite material is surveyed, when material damages, it is impossible to material is repaired in time, and works as damage of material optical fiber Also it is damaged, no longer there is damnification self-diagnosis.
The present invention is according to a set of self-repairing system of the bionical selfreparing mechanismic design of built-in capsule, which answers a pager's call Reason is to penetrate into the Capsules for including bonding agent in material, once material cracks under external force, partial capsules are broken Split, adhering liquid flows out and gos deep into crackle, material crack can be made to heal again;Or contain a kind of catalyst or rush inside Capsules Into agent, once material cracks under external force, partial capsules rupture, catalyst or accelerating agent flow out, so as to promote material Material is internal to be occurred chemical reaction and heals automatically.The concept of liquid core fibre selfreparing is to be embedded to the liquid core fibre of matrix, in crackle Itd is proposed when curing crackle during extension to discharge reparation material.The external comparison in the work development of liquid-core optical fibre this respect is early, Liquid-core optical fibre has been succeeded in developing first in E.Plppen in 1970, but the liquid-core optical fibre loss developed is bigger, is working as When study condition under, by liquid-core optical fibre be used for communicate be unrealistic, happen silica fibre at this time and be in vigorous growth Phase, optical fiber production technology improve quickly, the loss of the silica fibre produced oneself close to theoretical loss value.Although liquid-core optical fibre It is not applied to optic communication, but the properties of liquid-core optical fibre has been had been found that in testing, as spectral transmissions are efficient, mechanical performance Well, high power light source, nonlinear characteristic, large-numerical aperture etc. can be transmitted.In recent years, the domestic research for liquid-core optical fibre Many unit expansion, but research focuses primarily upon the development of liquid-core optical fibre and its research of characteristic, is mainly used in light wave In terms of transmission, other purposes yet there are no relevant report.
The present invention proposes a kind of composite structure damage based on FUZZY ALGORITHMS FOR CONTROL based on special liquid-core optical fibre Self-repairing system and method, optical fiber intelligent structure self-repairing system of this method based on a set of autonomous Design, using liquid-core optical fibre As sensor, when damage and failure occurs for Intelligent material structure, system controls the switch for repairing light source by control module, from And realize light reparation.
The content of the invention:
In order to reach foregoing invention purpose, the present invention provides a kind of composite structure damage based on FUZZY ALGORITHMS FOR CONTROL Self-repairing system and method.
The present invention adopts the following technical scheme that:A kind of composite structure damage self-repairing system based on FUZZY ALGORITHMS FOR CONTROL System, it includes light source module, liquid-core optical fibre intelligence structure module, Photoelectric Detection module, micro controller module, analog-to-digital conversion mould Block, buzzer module, digital display module, relay module;
The light source module includes communication light source and repairs light source, switch and the relay module phase of the light source module Even;
The liquid-core optical fibre intelligence structure module is embedded to liquid-core optical fibre in the composite using composite material as base material;
The Photoelectric Detection module includes photoelectric conversion module and signal amplification module, and the photoelectric conversion module uses light The resistance that one size of electric triode series connection is 50 ohm, the signal amplification module are described logical using difference amplifier AD626 Letter light source and repair light source and be irradiated in one end of liquid-core optical fibre intelligence structure module, the liquid-core optical fibre intelligence structure module it is another One end connects phototriode;
The micro controller module connects bee using the P1.0 mouths of general processor AT89S51, the processor AT89S51 Ring device module, P2 mouthfuls of connection digital display modules, control the display of digital display module, P1.1 mouthfuls of connection relay moulds Block, when composite material damages, sets P1.1 mouthfuls of output high level, trigger relay module works, analog-to-digital conversion module Output pin connects P2 mouthfuls, and the analog-to-digital conversion module uses ADC0809 chips, the voltage connection of signal amplification module output The IN0 pins of ADC0809 chips.
Further, the communication light source is the light source that wavelength is 632nm, and the reparation light source is that wavelength is 320nm's Light source.
The present invention also adopts the following technical scheme that:A kind of composite structure damage self-repairing based on FUZZY ALGORITHMS FOR CONTROL Method, it includes the following steps:
The first step:Structure Optic Fiber Smart Composite making step, liquid-core optical fibre is embedded in composite material, forms wick-containing Optical fiber intelligent structure module;
Second step:Experimental system test platform step is built, system test platform is intelligently tied by light source module, liquid-core optical fibre Structure module, Photoelectric Detection module and micro controller module are formed, and wherein light source module includes communication light source and repairs light source, photoelectricity Detection module includes photoelectric conversion module and signal amplification module, signal amplification module connection micro controller module;
3rd step:Composite material health status signal acquisition step in liquid-core optical fibre intelligence structure module, selection wavelength are The light source of 632nm selects wavelength as reparation light source of the light of 320nm as system, while select one thoroughly as communication light source Mirror converges light source emergent light, for irradiating one end of liquid-core optical fibre intelligence structure module, sensing composite material knot as medium The health status information of structure is right as photo-sensitive cell in the other end of liquid-core optical fibre intelligence structure module, connection phototriode Emergent light carries out opto-electronic conversion, and obtains photo-signal;
4th step:The amplification procedure of signal, signal amplification module pass through photoelectric current using difference amplifier AD626 Photo-signal is amplified and converted to voltage signal by signal pre-amplifying module;
5th step:Amplified signal processing step, micro controller module use general processor AT89S51, pass through mould Analog signal is converted into the digital signal that computer can identify by number modular converters, using three seven segment digital tubes as data Display apparatus module, shows for data, the light intensity value that is exported in real time according to liquid-core optical fibre intelligence structure module and in composite material The light intensity value of optical fiber output carries out fuzzy operation, after fuzzy operation, output control signal, by this under structural health conditions Control signal controls the folding of relay, and then controls communication light source and repair the conversion between light source, to reach to composite wood Expect the selfreparing of structural damage.
Further, fuzzy operation in the 5th step, specifically includes following steps
Step 1:Communication light source is opened, the output valve of optical fiber is shown in digital display module;
Step 2:The optical fiber output value that system is obtained in real time and liquid-core optical fibre intelligence structure under composite material health status Module output valve compares, and judges whether composite structure damages, if the data value that measures in real time and health status is defeated Go out value compared to reducing, and when measured value is reduced to a certain threshold value, then judge that composite material suffers from damage and failure, it is no Then not damaged;
Step 3:If it is determined that damaging, buzzer module alarm, system is cut communication light source by relay module Reparation light source is changed to, after a period of time, light source will be repaired and be switched to communication light source, the data value compared again and health Liquid-core optical fibre intelligence structure module output valve under state, judges whether to repair and completes;
Step 4:If injury repair does not complete, continue above step 3, completed if repaired, EP (end of program), buzzer Module stops.
The present invention has the advantages that:Monitoring system and side proposed by the present invention based on liquid-core optical fibre intelligence structure Method realizes the damage self-repairing of composite structure.
Brief description of the drawings:
Fig. 1 hardware system structure figures of the present invention.
Liquid-core optical fibre structure chart in Fig. 2 systems of the present invention.
Photoelectric Detection block flow diagram in Fig. 3 systems of the present invention.
Photoelectric conversion module circuit diagram in Fig. 4 systems of the present invention.
Signal amplification module figure in Fig. 5 systems of the present invention.
Difference amplifier AD626 internal structure schematic diagrams in Fig. 6 systems of the present invention.
Micro controller module block diagram in Fig. 7 systems of the present invention.
Relay module circuit diagram in Fig. 8 systems of the present invention.
Fig. 9 Fuzzy control system Software for Design flow charts of the present invention.
Figure 10 experimental provision schematic diagrams.
Symbol description in figure:
101- light source modules;102- liquid-core optical fibre intelligence structure modules;103- Photoelectric Detection modules;104- microcontroller moulds Block;105- phototriodes;106- difference amplifiers AD626;107- damage and failure devices;301- photoelectric conversion modules;302- believes Number amplification module;401-A/D modules;402- buzzer modules;403- digital display modules;404- relay module.
Embodiment:
It refer to shown in Fig. 1, the composite structure damage self-repairing system of the invention based on FUZZY ALGORITHMS FOR CONTROL, including Light source module 101, liquid-core optical fibre intelligence structure module 102, Photoelectric Detection module 103, photoelectric conversion module 301, signal amplification Module 302, micro controller module 104, analog-to-digital conversion module 401, buzzer module 402, digital display module 403, relay Device module 404, signal processing module, the switch of light source module 101 is connected with relay module 404, and light source module 101 includes Communication light source and reparation light source, select wavelength to be passed for communication light source of the light source of 632nm as system for irradiating liquid-core optical fibre Sensor, the health status information of sensing composite material structure;Wavelength is selected to be used for reparation light source of the light of 320nm as system To the irradiation of curing agent after damage, repair light source and pass through with repairing the curing consistent wavelength of liquid, communication light source and reparation light source Lens Coupling enters in liquid-core optical fibre.
Liquid-core optical fibre intelligence structure module 102, is repaired for the health status information of bearing composites structure and storage The reparation liquid of composite structure, liquid-core optical fibre intelligence structure module are as shown in Figure 2.The present invention is with fiberglass reinforced E-51 asphalt mixtures modified by epoxy resin Resin-based composite is base material, and liquid-core optical fibre is embedded in composite structure, is coupled with composite panel, forms liquid-core optical fibre Intelligence structure module, by oligomer, photoinitiator, reactive diluent and auxiliary agent, these four materials are mixed in a certain ratio its core liquid Form, one end of liquid-core optical fibre is connected by lens with communication light source and reparation light source, other end connection phototriode.
Photoelectric Detection module 103, for the reception, conversion and amplification of optical signal, it includes photoelectric conversion module 301 and letter Number amplification module 302, its block flow diagram are as shown in Figure 3.
Photoelectric conversion module 301, for converting optical signals into current signal, using highly sensitive phototriode 105, the size of connecting is 50 ohm of resistance, and circuit diagram is as shown in figure 4, under applied voltage VCC, when light irradiates photoelectricity three Just there is photoelectric current generation during pole pipe 105.Signal amplification module 302, the micro current signal for photoelectric conversion module to be exported are put Greatly, for circuit diagram as shown in figure 5, signal amplification module 302 uses difference amplifier AD626, its circuit has preamplifier and ring Formed around amplifier.Wherein difference amplifier AD626, internal circuit diagram is as shown in fig. 6, input signal is applied first to and double has In the attenuator R1~R4 of source, the purpose is to reduce the maximum common mode voltage of input preamplifier.The preamplifier is by low Operational amplifier A 1 of drifting about forms feedback stage.So allow for the Differential Input electricity accurately amplified in the case of big common-mode voltage The permission input voltage that pressure ratio actually enters A1 is 6 times big.By carrying out precise laser finishing to R3 and R4, make common-mode error most It is small.So that difference amplifier AD626 common-mode rejection ratios minimum 10000:1(80dB).In order to reduce due to being input to A1's The influence for the additional RF signals that rectified action is produced in input terminal, so using small filter capacitor C1 and C2.Difference amplifier The source impedance of AD626 is set lower than 1k Ω, to reduce gain error.We are by setting the feedback net around amplifier A2 at the same time Network sets gain, and the working gain of output buffer A2 is 2, the preposition calibration-gains of difference amplifier AD626 are 10.
Micro controller module 104, for controlling collection and processing to the electric signal after opto-electronic conversion, including control modulus Collection of the modular converter 401 to signal, micro controller module 104 of the present invention is using the general processor in 8051 series AT89S51, user can have 256 bytes with RAM.The P1.0 mouth connection buzzer modules of wherein processor AT89S51, P2 mouthfuls of connections Digital display module, controls the display of digital display module, P1.1 mouthfuls of connection relay module, when composite material damages When hindering, P1.1 mouthfuls of output high level, the work of trigger relay module, the output pin connection P2 of analog-to-digital conversion module 401 are set Mouthful, the block diagram of micro controller module 104 is as shown in Figure 7;
Analog-to-digital conversion module 401, analog-to-digital conversion module 401 use A/D conversion chip ADC0809, and signal amplification module is defeated The IN0 pins of the voltage connection ADC0809 chips gone out, reference voltage is 5 volts, its input pin connection processing device AT89S51's P2 mouthfuls, for analog signal (V) to be converted into the digital signal (U) that computer can identify, if liquid-core optical fibre output through light Value after the processing of electro-detection module 103 is V, can be calculated after the conversion of analog-to-digital conversion module 401 according to following formula Numerical value U:
Wherein, Vc=5V represents the reference voltage of A/D modules access;N=10 is the digit of A/D modules.
Buzzer module 402, for sending alarm while composite structure damages.Connection processing device The P1.0 mouths of AT89S51, when composite structure damages, it is high level to set P1.0 mouthfuls, so as to be damaged in material Alarm is sent while wound.
Digital display module 403, using three seven segment digital tubes as display, is shown based on common anode connection and static state Show, be connected with the P2 mouths of processor AT89S51, shown for the data in experimentation.
Relay module 404, for controlling communication light source and repairing the switching between light source, its circuit diagram is as shown in Figure 8. When composite material damages, 404 coil of relay module is electrically energized, and the iron core in coil produces powerful electromagnetic force, Moving armature band movable contact spring is inhaled, disconnects contact 2,5,2,4 connect, so as to connect reparation light source, realize from communication light source to reparation The switching of light source so that damage can repair in time;Go out to cure when repairing liquid stream, after injury repair, coil blackout, spring makes spring Piece resets, and disconnects contact 2,4, and 2,5 connect, that is, completes from the switching for repairing light source to communication light source.
Signal processing module, for the place by the data message comprising composite structure health to optical fiber output Reason, controls the folding of relay module, and then controls communication light source and repair the conversion between light source, reaches to composite material knot The purpose of the selfreparing of structure damage.In the invention system, the light come from liquid-core optical fibre output passes through 301 turns of photoelectric conversion module Voltage after changing is 0.22~0.25V, and after amplifying 10 times by signal amplification module 302, magnitude of voltage is changed into 2.2~2.5V, this When voltage be analog signal, it is necessary to the identifiable digital signal of system is converted into through A/D modules, in micro controller module A/D modules are 10, and the reference voltage of use is 5V, obtain the theoretical value of optical fiber output light intensity between 409~512.So We are further processed data using fuzzy algorithmic approach afterwards, can be timely after composite structure damages Repair, its Fuzzy control system Software for Design flow chart is as shown in Figure 9.
Composite structure damage self-repairing method of the invention based on FUZZY ALGORITHMS FOR CONTROL, comprises the following steps:
The first step:Structure Optic Fiber Smart Composite making step, liquid-core optical fibre is embedded in composite material, forms wick-containing Optical fiber intelligent structure module;
Second step:Experimental system test platform step is built, system test platform is intelligently tied by light source module, liquid-core optical fibre Structure module, Photoelectric Detection module and micro controller module are formed, and wherein light source module includes communication light source and repairs light source, photoelectricity Detection module includes photoelectric conversion module and signal amplification module, signal amplification module connection micro controller module, microcontroller Module includes analog-to-digital conversion module, buzzer module, digital display module and relay module;
3rd step:Composite material health status signal acquisition step in liquid-core optical fibre intelligence structure module, selection wavelength are The light source of 632nm selects the reparation light source of light that wavelength is 320nm as system as communication light source, for after damage to consolidating The irradiation of agent, repairs light source with repairing the curing consistent wavelength of liquid, while selects a lens to be emitted light source as medium Light converges, for irradiating one end of liquid-core optical fibre intelligence structure module, the health status information of sensing composite material structure;In liquid The other end of core fibre intelligence structure module, connection phototriode be used as photo-sensitive cell, to emergent light progress opto-electronic conversion, and Photo-signal is obtained, the present invention is using phototriode as photoelectric conversion module;
4th step:The amplification procedure of signal, signal amplification module pass through photoelectric current using difference amplifier AD626 Photo-signal is amplified and converted to voltage signal by signal pre-amplifying module;
5th step:Amplified signal processing step, the present invention use the general purpose microprocessor in 8051 series AT89S51, is converted into the digital signal that computer can identify, using three seven sections by analog-to-digital conversion module by analog signal Charactron is shown, the light intensity exported in real time according to liquid-core optical fibre intelligence structure module as data display equipment module for data It is worth and the light intensity value of optical fiber output carries out fuzzy operation, output control signal, by this under composite structure health status Control signal controls the folding of relay, and then controls communication light source and repair the conversion between light source, reaches to composite material The purpose of the selfreparing of structural damage.
Fuzzy operation in wherein the 5th step, specifically includes following steps:
Step 1:Communication light source is opened, the output valve of optical fiber is shown in digital display module;
Step 2:The optical fiber output value that system is obtained in real time and liquid-core optical fibre intelligence structure under composite material health status Module output valve compares, and judges whether composite structure damages, if the data value that measures in real time and health status is defeated Go out value compared to being substantially reduced, and when measured value is reduced to a certain threshold value, then it is broken to judge that composite material suffers from damage It is bad, otherwise not damaged;
Step 3:If it is determined that damaging, buzzer module alarm, system is cut communication light source by relay module Reparation light source is changed to, after a period of time, light source will be repaired and be switched to communication light source, the data value compared again and health Liquid-core optical fibre intelligence structure module output valve under state, judges whether to repair and completes;
Step 4:If injury repair does not complete, continue above step 3, completed if repaired, EP (end of program), buzzer Module stops alarm.
Fuzzy operation has two inputs in the present invention, is respectively designated as E and EC, and E represents this measurement optical fiber output light intensity Difference under value and health status between fibre optical sensor output light intensity values, EC represent light intensity value and the last time measurement of this measurement Light intensity value between difference.The domain of E is [- 512,0], since the light intensity that optical fiber reparation exports afterwards can reduce, EC Domain be [0,310].The fuzzy subset of E has { NL, NM, NS, ZO }, and the fuzzy subset of EC has { ZO, PS, PM, PL }, wherein, B, M, S represent that large, medium and small, N, B represent positive and negative respectively.For example the fuzzy subset NL of E represents larger light intensity difference, i.e., this is surveyed The difference measured under optical fiber output light intensity value and health status between fibre optical sensor output light intensity values is larger, the fuzzy subset PM of EC Represent medium light intensity difference, i.e., between this measurement optical fiber output light intensity value and the fibre optical sensor output light intensity values of last time measurement Difference it is medium.The fuzzy subset ZO of E represents that the light intensity value under measurement light intensity value and health status is equal, the fuzzy subset ZO of EC Represent that the light intensity value of this light intensity value measured and last time measurement is equal.The fuzzy quantity input conversion of E and EC is respectively such as table 1 and table Shown in 2, method is all included into using maximum membership degree.As can be seen from the table, for E, light intensity difference belongs to ZO in [- 50,0], poor Value belongs to NS in [- 300, -50], and difference belongs to NM in [- 300, -512], and light intensity difference belongs to NL at [- ∞, -512];With this Analogize, for EC, difference in [0,50], belongs to ZO in light intensity difference, and difference belongs to PS in [50,125], difference [125, 300] PM is belonged to, light intensity difference belongs to PL at [300 ,+∞].
The fuzzy conversion table of 1 input quantity E of table.
The fuzzy conversion table of 2 input quantity EC of table.
The output of fuzzy operation is U, represents the time length of folding and the folding of relay, the duty of size PWM ripples Than representing, the fuzzy subset of U includes { OL, OM, OS, ZO, CS, CM, CL }, for example OL represents to open relay, that is, open-minded Light source is repaired, and keeps prolonged open-minded, OM represents the open-minded of long period, and OS represents the open-minded of short time, and CL is represented Closing relay, that is, open communication light source, and keeps prolonged open-minded, and the CM expression long periods open reparation light source, CS Represent the short time opens communication light source.ZO represents to keep original state.Fuzzy decision table is as shown in table 3.
3 fuzzy decision table of table.
Illustrate that composite structure of the present invention based on FUZZY ALGORITHMS FOR CONTROL damages below by a specific embodiment Hinder self-repairing system and method.
, will be certainly exemplified by monitoring the common fiberglass reinforced E-51 epoxy resin-base composite material structural health conditions of aircraft In the liquid-core optical fiber sensor embedment E-51 composite materials of system, liquid-core optical fibre intelligence structure module 102 is formed, Experimental equipment is such as Shown in Figure 10, it includes light source module 101, Photoelectric Detection module 103, micro controller module 104 and damage and failure device 107, its Middle light source module 101 includes communication light source and repairs light source, and Photoelectric Detection module 103 includes photoelectric conversion module 301 and signal Amplification module 302, micro controller module 104 include analog-to-digital conversion module 401, buzzer module 402, digital display module 403 and relay module 404, device is connected, composite panel is loaded, the experiment such as damage and failure.
It is as follows to test detailed process:Do not do any loading or damage and failure processing to composite panel first, obtain compound The data value of material optical fiber output under health status, after stablizing, records the data shown on charactron, then respectively to compound The region that liquid-core optical fibre is embedded with material carries out loading failure test, while records data.Repetition test 3 times, data such as table 4 It is shown.
4 experimental result of table
In experimentation, while generation is being damaged, buzzer module timely responds to and sends alarm.According to table 4 Experimental data can be seen that when composite structure is under health status, and the light intensity value of optical fiber output is normal, and numerical value is all Between 409-512, after damaging, numerical value drastically declines, and after damage, optical fiber loses thang-kng function, but due to The influence of surrounding environment veiling glare, the numerical value on digital display is kept to 0, afterwards under the work of whole system, light Source is switched to reparation light source, after a period of time, repairs and is cured under the irradiation in liquid repairing compound light source, damage location is cured Repair, light path is connected, the value increase on display, but since damage has occurred and that, can not return to original communication Ability, thus it is small compared to the numerical value under health status.
Result of study of the present invention shows that the control system can control effectively cutting between communication light source and reparation light source Change, realize the purpose of composite structure damage self-repairing.
The above is only the preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art For member, some improvement can also be made without departing from the principle of the present invention, these improvement also should be regarded as the present invention's Protection domain.

Claims (2)

  1. A kind of 1. composite structure damage self-repairing method based on FUZZY ALGORITHMS FOR CONTROL, it is characterised in that:Including following step Suddenly
    The first step:Structure Optic Fiber Smart Composite making step, liquid-core optical fiber sensor is embedded in composite material, forms liquid Core fibre intelligence structure module;
    Second step:Experimental system test platform step is built, system test platform is by light source module, liquid-core optical fibre intelligence structure mould Block, Photoelectric Detection module and micro controller module are formed, and wherein light source module includes communication light source and repairs light source, Photoelectric Detection Module includes photoelectric conversion module and signal amplification module, signal amplification module connection micro controller module;
    3rd step:Composite material health status signal acquisition step in liquid-core optical fibre intelligence structure module, selection wavelength are 632nm Light source as communication light source, select the reparation light source of light that wavelength is 320nm as system, while one lens conduct of selection Medium, converges light source emergent light, and for irradiating one end of liquid-core optical fibre intelligence structure module, sensing composite material structure is good for Health status information, in the other end of liquid-core optical fibre intelligence structure module, connection phototriode is as photo-sensitive cell, to emergent light Opto-electronic conversion is carried out, and obtains photo-signal;
    4th step:The amplification procedure of signal, signal amplification module pass through photo-signal using difference amplifier AD626 Photo-signal is amplified and converted to voltage signal by pre-amplifying module;
    5th step:Amplified signal processing step, micro controller module use general processor AT89S51, are turned by modulus Analog signal is converted into the digital signal that computer can identify by mold changing block, is shown using three seven segment digital tubes as data Device module, shows for data, the light intensity value that is exported in real time according to liquid-core optical fibre intelligence structure module and in composite structure The light intensity value of optical fiber output carries out fuzzy operation under health status, and after fuzzy operation, output control signal, passes through the control The folding of signal control relay module, and then control communication light source and repair the conversion between light source, to reach to composite wood Expect the selfreparing of structural damage.
  2. 2. the composite structure damage self-repairing method based on FUZZY ALGORITHMS FOR CONTROL, its feature exist as claimed in claim 1 In:Fuzzy operation in 5th step, specifically includes following steps:
    Step 1:Communication light source is opened, the output valve of optical fiber is shown in digital display module;
    Step 2:The optical fiber output value that system is obtained in real time and liquid-core optical fibre intelligence structure module under composite material health status Output valve compares, and judges whether composite structure damages, if the data value and the output valve of health status that measure in real time Compared to reducing, and when measured value is reduced to a certain threshold value, then judge that composite material suffers from damage and failure, otherwise without Damage;
    Step 3:If it is determined that damaging, communication light source is switched to by buzzer module alarm, system by relay module Light source is repaired, after a period of time, light source will be repaired and be switched to communication light source, the data value and health status compared again Lower liquid-core optical fibre intelligence structure module output valve, judges whether to repair and completes;
    Step 4:If injury repair does not complete, continue above step 3, completed if repaired, EP (end of program), buzzer module Stop.
CN201610004480.8A 2016-01-06 2016-01-06 Composite structure damage self-repairing method based on FUZZY ALGORITHMS FOR CONTROL Expired - Fee Related CN105467835B (en)

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