CN106198751B - Sensory perceptual system and operation method are merged in distributed sensing fiber sound emission - Google Patents
Sensory perceptual system and operation method are merged in distributed sensing fiber sound emission Download PDFInfo
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- CN106198751B CN106198751B CN201610481845.6A CN201610481845A CN106198751B CN 106198751 B CN106198751 B CN 106198751B CN 201610481845 A CN201610481845 A CN 201610481845A CN 106198751 B CN106198751 B CN 106198751B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
- G01N29/14—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object using acoustic emission techniques
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01H—MEASUREMENT OF MECHANICAL VIBRATIONS OR ULTRASONIC, SONIC OR INFRASONIC WAVES
- G01H9/00—Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves by using radiation-sensitive means, e.g. optical means
- G01H9/004—Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves by using radiation-sensitive means, e.g. optical means using fibre optic sensors
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
- G01N29/22—Details, e.g. general constructional or apparatus details
- G01N29/223—Supports, positioning or alignment in fixed situation
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
- G01N29/22—Details, e.g. general constructional or apparatus details
- G01N29/32—Arrangements for suppressing undesired influences, e.g. temperature or pressure variations, compensating for signal noise
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2291/00—Indexing codes associated with group G01N29/00
- G01N2291/02—Indexing codes associated with the analysed material
- G01N2291/023—Solids
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2291/00—Indexing codes associated with group G01N29/00
- G01N2291/02—Indexing codes associated with the analysed material
- G01N2291/028—Material parameters
- G01N2291/0289—Internal structure, e.g. defects, grain size, texture
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2291/00—Indexing codes associated with group G01N29/00
- G01N2291/10—Number of transducers
- G01N2291/106—Number of transducers one or more transducer arrays
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Abstract
The invention discloses a kind of distributed sensing fiber sound emission fusion sensory perceptual system and operation method, the sensory perceptual system includes the temperature sensitive compensation device of sensor fibre and sensor fibre sound emission demodulating equipment, and the sensor fibre in the temperature sensitive compensation device of sensor fibre enters into sensor fibre sound emission demodulating equipment after overcompensation.The present invention is from mechanism and practical engineering application aspect, it is superimposed with breaking through traditional simple technique pure, femtosecond laser optical frequency com technology is introduced to be merged with acoustic emission, separate Rayleigh ejection scattering and Brillouin scattering realizes that classification perceives acoustic emission wave, the emerging system of the temperature sensitive compensation device of more multimember sensor fibres of device multimode and optical fiber sound emission demodulating equipment is merged, with can space orientation, it is whole distributed, high spatial resolution, high detection accuracy, can quantitative detection the advantages that, reducing monitoring cost, improving monitoring accuracy and lifting practical application ability etc. has greater advantage.
Description
Technical field
The present invention relates to distributed sensing fiber sound emission fusion sensory perceptual system and operation method, belongs to Hydraulic Projects structure peace
Full monitoring and field of detecting.
Background technology
Due to the invention of laser and optical fiber, optical fiber technology achieves success highly visible, in the promotion of optical communication technique
Under, the research and development for the related devices such as various optical fiber, device, element, instrument and machinery are set achieve huge progress, many
Well known, light wave is a kind of electromagnetic wave, and when in medium as electromagnetic wave incident to such as optical fiber, incident electromagnetic wave will be with
The molecule or atomic interaction of the material are formed, so as to produce scattering spectra, common are Rayleigh scattering, Brillouin scattering,
By using these scattering optical informations, be developed many sensor fibre monitoring instruments, since Meng Dezi in 1989 etc. first
By since carrying out structural safety monitoring in fibre optical sensor embedded concrete structure body, scholars have further promoted the technology
Application in building, hydraulic engineering, present optical fiber sensing technology monitoring composite material curing, structure Non-Destructive Testing,
Some achievements are achieved in terms of damage monitoring, identification and assessment；
In water conservancy and civil engineering, material internal can occur not in the case where being acted on by ambient temperature, water ballast(ing), gravity etc.
With the fracture of degree, this kind fracture is sightless internal injury in many cases, if cannot detect and find in time, very may be used
It can develop into a security risk in engineering, this defect or damage as the time occurs and a kind of constantly accumulates
Irreversible procedure, it is likely to result in the unexpected loss of structure generation wholly or partially, and then causes serious engineering
Problem, material can discharge elastic energy in damage, and elasticity can be propagated in the form of elastic wave in the material, this elastic wave quilt
Referred to as acoustic emission wave.
But the monitoring device currently researched and developed, due to current performance parameters variation and the demand of high standard, optical fiber passes
The practical application of sense technology is still far lagged behind currently to the demand of the technology, wherein fusion sensor fibre technology and sound emission
Technology is the field that one of research is extremely short of, since sensor fibre technology and acoustic emission have excellent monitoring
Detection performance, great technological innovation will be produced by being merged it, and to break through, system is huge, cable is excessive, anti-electrical measurement interference
Can the piezoelectric ceramics acoustic emission detection method of force difference and the Fiber Bragg Grating FBG type acoustic emission detection system of current point type monitoring.
The content of the invention
Goal of the invention：In order to overcome the deficiencies in the prior art, the present invention provides a kind of distributed sensing fiber sound
Transmitting fusion sensory perceptual system and operation method, profit fusion femtosecond laser optical frequency com technology and acoustic emission, pass through structure
The new monitoring Detection Techniques that Rayleigh ejection scattering, the optical fiber sensing technology of Brillouin scattering are merged with acoustic emission, are realized
Can space orientation, whole distribution, high spatial resolution, the monitoring Detection Techniques of high detection accuracy, its vertical point novelty, structure
Laying is simple and convenient to operate, and has preferable practical engineering application meaning and scientific research value.
Technical solution：In order to solve the above technical problems, a kind of distributed sensing fiber sound emission fusion of the present invention perceives
System, including the temperature sensitive compensation device of sensor fibre and sensor fibre sound emission demodulating equipment, sensor fibre are sent out from sensor fibre sound
Penetrate demodulating equipment to set out, by the temperature sensitive compensation device of sensor fibre, finally return again to sensor fibre sound emission demodulating equipment, sense
The head and the tail of sensor fibre in the temperature sensitive compensation device of optical fiber need to connect with sensor fibre sound emission demodulating equipment；
The temperature sensitive compensation device of sensor fibre includes load fibre and leads gang mould block and temperature sensitive compensating module, and the load fibre leads gang mould
Pass through the first sensor fibre, the second sensor fibre and the 3rd sensor fibre in block, carry fibre and lead gang mould block and be equipped with and fix the first biography
Photosensitive fine and the 3rd sensor fibre built-in solid fiber module, the first sensor fibre and the 3rd sensor fibre pass through built-in solid fiber module
It is arranged in parallel after fixation with the second sensor fibre；First sensor fibre and the 3rd sensor fibre are located at the upper of arc-shaped housing
Surface, the second sensor fibre pass through temperature compensation means after be fixed on another carry fibre lead on gang mould block, the first sensor fibre and
3rd sensor fibre is fixed on load fibre by solid fiber module built in another pair and leads on gang mould block；
The sensor fibre sound emission demodulating equipment include driving power, mode-locked laser, femtosecond laser optical frequency com,
Pulse-modulator, wavelength division multiplexer, light path coupler, amplifier, receiver, detector, controller, concrete body safety
Behaviour assessment system, Rayleigh optical receiver, Brillouin light receiver, Light splitter toy, output terminal and the locked mode of the driving power swash
The input terminal connection of light device, the input terminal of driving power and the output terminal of controller connect, and the mode-locked laser is successively with flying
Second laser optics frequency comb, pulse-modulator are connected with wavelength division multiplexer, the output terminal of wavelength division multiplexer respectively with Light splitter toy
Input terminal is connected with the input terminal of light path coupler, the output terminal of the Light splitter toy input terminal and cloth with Rayleigh optical receiver respectively
In deep optical receiver input terminal connection, the output terminal of Rayleigh optical receiver and the output terminal and controller of Brillouin light receiver
Input terminal connection, the output terminal of light path coupler and the input terminal of the input terminal of amplifier and receiver connect, receiver
Output terminal is connected with the input terminal of detector, and the output terminal of detector is connected with the input terminal of controller, amplifier it is defeated
Outlet is connected with optical fiber voice sending sensor device, and controller output end is connected with concrete body safety characteristics evaluation system
Connect.
Preferably, the optical fiber voice sending sensor device includes bottom plate and the first side plate being fixedly connected with bottom plate both sides
With the second side plate, the top of the first side plate and the second side plate carries track road by arc and connects, bottom plate, the first side plate, the second side plate and
Arc carries track road and forms main chamber hole altogether；The top of first side plate and the second side plate is hinged with the first arc lid and the second arc respectively
Lid, the first arc lid lower face are fixedly connected with the first arc voltage body, and the second arc lid lower face is fixedly connected with the second arc voltage body, and first
The 4th sensor fibre carried positioned at arc in track road is equipped with below arc voltage body, the 5th sensor fibre is equipped with below the second arc voltage body, the
One arc lid and the second arc lid are connected by locking device；The first arc lid and the second arc lid are rotated, passes through the first arc voltage body and second
Arc voltage body compresses the 4th sensor fibre and the 5th sensor fibre, after pass through locking device and lock the first arc lid and the second arc lid.
Preferably, several first through hole are equipped with along the 4th sensor fibre axis direction on first side plate, it is described
On second side plate several second through holes are equipped with along the 5th sensor fibre axis direction.
Preferably, the first through hole is that chamber circular hole, common chamber circular hole section are circular hole altogether, the second through hole is common chamber hexagonal
Hole, chamber hexagon ring section is hexagon ring altogether, and first through hole and the second through hole are odd number.
Preferably, the load fibre leads gang mould block and includes optical fiber and holds microscope carrier, upper hold fine groove, middle hold fine groove, lower hold fine groove, mistake
Cross microscope carrier section, upper wedge-shaped microscope carrier section, lower wedge-shaped microscope carrier section, wherein, it is upper hold fine groove, it is middle hold fine groove, it is lower hold fine groove from top to bottom according to
The secondary optical fiber that is laid in holds in microscope carrier, and it is fine that the first sensor fibre, the second sensor fibre and the 3rd sensor fibre are sequentially fixed at appearance
In groove, the fine groove of middle appearance, the fine groove of lower appearance, optical fiber holds microscope carrier and passes through transition microscope carrier section and upper wedge-shaped microscope carrier section, lower wedge shape microscope carrier Duan Lian
Connect.
Preferably, the built-in solid fiber module include the fine threaded post of upper arc end fastener, lower arc end fastener, lock, on
Horizontal thread control column, lower horizontal thread control column, boss and a pair of of sliding block, the different built-in boss difference consolidated in fiber module
Positioned at upper wedge-shaped microscope carrier section and lower wedge-shaped microscope carrier section, boss is flexibly connected with upper horizontal thread control column and lower horizontal thread control column,
The upper horizontal thread control column and lower horizontal thread control column are threadedly coupled with a pair of of sliding block respectively, the fine threaded post of lock with wherein
One sliding block is threadedly coupled, and the lower arc end fastener is fixedly connected with another sliding block.
Preferably, the arc-shaped housing includes three layers, one layer of outermost is special type composite material layer, and intermediate layer is gold
Belong to separate slot layer, innermost layer is inner layer composite material layer.
Preferably, the temperature compensation module includes the spheroid that a pair of of arc composite bodies are formed, two spheroids
Positioned at the both ends of arc-shaped housing, the first logical fine pipe for passing through equipped with the second sensor fibre in spheroid, two spheroids it
Between be equipped with the cucurbit body of calabash shaped made of composite material, the second logical fine pipe is equipped with cucurbit body, the second sensor fibre is worn successively
The first logical fine pipe, the second logical fine pipe and another first logical fine pipe are crossed, spheroid and cucurbit body are supported on by inner support column
In arc-shaped housing.
A kind of operation method of above-mentioned distributed sensing fiber sound emission fusion sensory perceptual system, comprises the following steps：
The first step, be equipped with three it is to be monitored by the use of sensor fibre be used as the first sensor fibre, the second sensor fibre and the 3rd
Sensor fibre, makes arc-shaped housing, is equipped with special type composite material and spheroid, and requires special type composite material layer and pass through this
Corresponding first sensor fibre and the 3rd sensor fibre of a little materials, by the first sensor fibre, the second sensor fibre and the 3rd sensing
Optical fiber passes through the upper appearance fibre groove at the temperature sensitive compensation device initial end of sensor fibre on optical fiber appearance microscope carrier, the fine groove of middle appearance, lower appearance respectively
In fine groove, and glue is injected separately into the fine groove of upper appearance, the fine groove of middle appearance, lower appearance fibre groove, the temperature sensitive compensation of sensor fibre will be penetrated
Be fixed at the initial end of three sensor fibres of device, after by the first sensor fibre and the 3rd sensor fibre with certain arc
Degree is transitioned into transition microscope carrier section, and the second sensor fibre level is stretched into the first logical fine pipe and the second logical fine pipe, and to the
One logical fine pipe and the second logical fine pipe are packaged；
Second step, the first sensor fibre is transitioned into using angle with horizontal plane as 60 ° of angle by the first sensor fibre convex
In platform, and inject glue in boss and fixed the first sensor fibre again, be distributed in the lock fibre threaded post at head and the tail both ends
The movement of arc end fastener in drive, the elongation that the first sensor fibre is carried out to pre-tensile stress are fixed, and in arc-shaped housing
First sensor fibre is deployed in the special type composite material layer being in contact with it by middle injection glue, the 3rd sensor fibre is carried out same
The laying of sample, the second sensor fibre is led in the first logical fine pipe and the second logical fine pipe, and logical to the first logical fine pipe and second
Fine pipe is packaged, and the first sensor fibre, the second sensor fibre and the 3rd sensor fibre is passed through the temperature sensitive compensation of sensor fibre
The end optical fiber of device hold upper appearance fibre groove on microscope carrier, it is middle hold fine groove, it is lower hold fine groove, and hold upwards fine groove, it is middle hold fine groove, under
Hold fine groove injection glue, and then complete the operation of sensor fibre temperature-insensitiveization, and the device is buried, complete final
Sensing device is laid；
3rd step, all parts of sensor fibre sound emission demodulating equipment are opened, by controlling controller to start driving
Power supply, so as to encourage mode-locked laser to produce femtosecond laser optical frequency com, passes through pulse-modulator, wavelength division multiplexer, light point
Device realizes the modulation to femtosecond laser optical frequency com；
4th step, in order to more accurately remove the interference of temperature, will pass through processed first sensing of special type composite material
Optical fiber and the 3rd sensor fibre strain value are averaged, the accurate sensor fibre strain value obtained as first time,
The average of the first sensor fibre and the 3rd sensor fibre strain value is corrected with the strain value of the second sensor fibre afterwards, as most
The strain value of the whole sensor fibre monitoring for going temperature to influence；
5th step, when structure somewhere to be measured is damaged, can produce acoustic emission signal, the acoustic emission signal meeting passed through
It is transmitted to according to different Time And Frequencies in common chamber circular hole, altogether chamber hexagon ring and main chamber hole altogether, the Rayleigh in sensor fibre dissipates
Penetrating optical information and Brillouin scattering optical information can have an impact, can by Rayleigh optical receiver, Brillouin light receiver, receiver
The femtosecond laser optical frequency com of Rayleigh scattering optical information and Brillouin scattering optical information to change is received and detected, after
It is pooled to by controller in concrete body safety characteristics evaluation system and is analyzed and studied, to the position of structure bulk damage
Put, degree information is assessed and is analyzed.
Beneficial effect：The distributed sensing fiber sound emission fusion sensory perceptual system of the present invention, should from mechanism and Practical Project
With aspect, it is superimposed with breaking through traditional simple technique pure, introduces femtosecond laser optical frequency com technology and sent out with sound
The technology of penetrating is merged, and separation Rayleigh ejection scattering and Brillouin scattering realize that classification perceives acoustic emission wave, have merged more devices
The temperature sensitive compensation device of the multimember sensor fibre of multimode, optical fiber voice sending sensor device and optical fiber sound emission demodulating equipment melt
Syzygy unite, have the advantages that can space orientation, whole process distribution, high spatial resolution, high detection accuracy, can quantitative detection, its
Structural integrity, the novel, structure of vertical point are laid and are simple and convenient to operate, it is possible to achieve procedure, automation application, monitor reducing
Cost, raising monitoring accuracy and lifting practical application ability etc. have greater advantage.
Brief description of the drawings
Fig. 1 is the structure chart of the present invention；
Fig. 2 is the structure diagram of the temperature sensitive compensation device of sensor fibre in Fig. 1；
Fig. 3 is the structure diagram in 1-1 sections in Fig. 2；
Fig. 4 is the structure diagram in 2-2 sections in Fig. 2；
Fig. 5 is the structure diagram in 3-3 sections in Fig. 2；
Fig. 6 is the detail structure chart of upper arc end fastener in Fig. 2；
Fig. 7 is the structure diagram of optical fiber voice sending sensor device in Fig. 1；
Fig. 8 is the structure diagram of sensor fibre sound emission demodulating equipment in Fig. 1.
Embodiment
As shown in Figures 1 to 8, a kind of distributed sensing fiber sound emission of the invention fusion sensory perceptual system, including sensing
The temperature sensitive compensation device of optical fiber and sensor fibre sound emission demodulating equipment, the sensor fibre in the temperature sensitive compensation device of sensor fibre pass through
Entered after compensation in sensor fibre sound emission demodulating equipment.
A kind of temperature sensitive compensation device of sensor fibre of the present invention, including carry fibre and lead gang mould block, built-in solid fiber module, temperature sensitive benefit
Repay module.Carry fibre and lead upper appearance of the gang mould block including long 20cm, wide 10cm, the optical fiber appearance microscope carrier 100 of high 5cm, groove depth for 2cm
Lower appearance fibre groove 106 that middle appearance fibre groove 105, the groove depth that fine groove 104, groove depth are 2cm are 2cm, long 10cm, width 5cm, height
The transition microscope carrier section 107 of 3cm, the upper wedge-shaped microscope carrier section 108 for being 60 ° with horizontal direction angle and lower wedge-shaped microscope carrier section 109, its
In, upper fine groove 104, the fine groove 105 of middle appearance, the fine groove 106 of lower appearance of holding is laid in optical fiber and holds in microscope carrier 100 successively from top to bottom, optical fiber
Hold microscope carrier 100 to be connected with upper wedge-shaped microscope carrier section 108, lower wedge-shaped microscope carrier section 109 by transition microscope carrier section 107, hold fine groove upwards
104th, it is middle hold fine groove 105 and it is lower hold irrigated in fine groove 106 518 instant glues by the first sensor fibre 101 of G.652D model,
G.652D the second sensor fibre 102 of model and G.652D the 3rd sensor fibre 103 of model be fixed on optical fiber hold microscope carrier 100
In, upper wedge-shaped microscope carrier section 108 that the first sensor fibre 101 and the 3rd sensor fibre 103 are respectively 60 ° by angle with horizontal plane
With lower wedge-shaped microscope carrier section 109.
Built-in solid fiber module includes the lower arc end fastener 118, straight of the upper arc end fastener 112 of thickness 2cm, thickness 2cm
Footpath 1cm, the fine threaded post 113 of the lock of length 4cm, length 5cm, upper horizontal thread control column 114, length 5cm, the diameter of diameter 1cm
Lower horizontal thread control column 115, boss 110 and a pair of of the sliding block 111 of 1cm, the boss 110 is positioned at upper wedge-shaped 108 He of microscope carrier section
In lower wedge shape microscope carrier section 109, boss 110 is flexibly connected with upper horizontal thread control column 114 and lower horizontal thread control column 115, upper horizontal stroke
Immovable, the upper horizontal thread control can only be rotated on boss 110 to screw thread control column 114 and lower horizontal thread control column 115
Column 114 and lower horizontal thread control column 115 are threadedly coupled with a pair of of sliding block 111 respectively, described to lock fine threaded post 113 and one of them
Sliding block 111 is threadedly coupled, and the lower arc end fastener 118 is fixedly connected with another sliding block 111.By rotating upper horizontal thread
Control column 114 and lower horizontal thread control column 115 are moved left and right with movable slider 111, are turned the fine threaded post 113 of lock and are driven the fine threaded post of lock
113 move up and down, so as to drive arc end fastener 112 to be moved through locking the first sensing with lower arc end fastener 118
101 and the 3rd sensor fibre 103 of optical fiber.
It is compound that temperature sensitive compensating module includes length 40cm, height 4cm, the arc-shaped housing 116 that overall diameter is 15cm, special type
Material layer 117, inner layer composite material layer 127, metal separate slot layer 128, length 40cm, upper half arc composite bodies 129, lower half arc
Composite bodies 121, diameter 2cm, the first of length 15cm the logical fine pipe 122, left arc composite material 123, right arc composite material
130th, diameter 2cm, the second of length 25cm the logical fine pipe 124, the interior dagger 131 of length 20cm, wherein matching somebody with somebody in arc-shaped housing 116
The special type composite material layer 117 of special property polymer matrix composites is equipped with, the special type of special property polymer matrix composites is answered
Condensation material layer 117 close to the metal separate slot layer 128 of chromium material, close to special property resin base answer by the inner side of metal separate slot layer 128
The inner layer composite material layer 127 of condensation material, inner layer composite material layer 127 are compound by interior dagger 131 and special property resin base
The upper half arc composite bodies 129 of material and the lower half arc composite bodies 121 of special property polymer matrix composites connect, on
Half arc composite bodies 129 and lower half arc composite bodies 121 form spheroid, diameter 2cm, the first of length 15cm the logical fine pipe
122 middle positions in upper half arc composite bodies 129 and lower half arc composite bodies 121, special property resin base are answered
It is diameter among the right arc composite material 130 of left the arc composite material 123 and special property polymer matrix composites of condensation material
2cm, the second of length 25cm the logical fine pipe 124, left arc composite material 123 and right arc composite material 130 constitute cucurbit body, extraordinary
The special type composite material layer 117 of performance resins based composites and G.652D type corresponding with passing through special type composite material layer 117
Number the first sensor fibre 101, G.652D the difference of the thermal coefficient of expansion of the 3rd sensor fibre 103 of model section first corresponding with this senses
The strain value product of 101 and the 3rd sensor fibre 103 of optical fiber is equal to correspondence section first sensor fibre 101 and the 3rd sensor fibre
103 temperature coefficient.
Built-in solid fiber module is configured with four altogether, respectively at the temperature sensitive compensation device initial end of sensor fibre, passes through
Solid fiber module built in four can modulate fixed G.652D the first sensor fibre 101 of model, the 3rd sensing of G.652D model
The position of optical fiber 103, will apply certain pre-tensile stress, chromium to the first sensor fibre 101 of laying and the 3rd sensor fibre 103
The metal separate slot layer 128 of material is by the special type composite material layer 117 of special property polymer matrix composites and special property resin
The isolation of inner layer composite material layer 127 of based composites separates, and the part within inner layer composite material layer 127 is formed one solely
Vertical structure, the second sensor fibre 102 first by upper half arc composite bodies 129 and lower half arc composite bodies 121, after
Again by left arc composite bodies 123 and right arc composite bodies 130, upper half arc composite bodies 129 and lower half arc composite wood
Expect body 121 and left arc composite bodies 123 and right arc composite bodies 130 all in inner layer composite material layer 127 and inner support
In cavity between column 131, and upper half arc composite bodies 129 and lower half arc composite bodies 121, left arc composite bodies
Compound thermal coefficient of expansion between 123 and right arc composite bodies 130 and inner layer composite material layer 127 is with passing through the corresponding section
The product of 102 strain value of the second sensor fibre of interpolation section corresponding with this of the thermal coefficient of expansion of second sensor fibre 102 is equal to
The temperature coefficient value of second sensor fibre 102 of the correspondence section.
The input terminal of driving power 417 in the sensor fibre sound emission demodulating equipment and the output terminal of controller 426
Connection, the output terminal of driving power 417 are connected with the input terminal of mode-locked laser 418,418 optical information output terminal of mode-locked laser
It is connected with femtosecond laser optical frequency com 419, the output terminal of femtosecond laser optical frequency com 419 is defeated with pulse-modulator 420
Enter end connection, the output terminal of pulse-modulator 420 is connected with the input terminal of wavelength division multiplexer 421, the output of wavelength division multiplexer 421
End is connected with the input terminal of Light splitter toy 432 and the input terminal of light path coupler 422 respectively, the output terminal difference of Light splitter toy 432
Be connected with the input terminal of Rayleigh optical receiver 430 and the input terminal of Brillouin light receiver 431, Rayleigh optical receiver 430 it is defeated
The output terminal of outlet and Brillouin light receiver 431 is connected with the input terminal of controller 426, the output terminal of light path coupler 422
It is connected with the input terminal of amplifier 423 and the input terminal of receiver 424, the output terminal of receiver 424 and the input of detector 425
End is connected, and the output terminal of detector 425 is connected with the input terminal of controller 426, output terminal and the optical fiber sound of amplifier 423
The fixed sensor fibre of GJJV models in transmitting sensing device is connected, 426 output terminal of controller and concrete body safety
Behaviour assessment system 427 is connected.
Optical fiber voice sending sensor device includes bottom plate and the first side plate 304 being fixedly connected with bottom plate both sides and the second side plate
305, the first side plate 304 carries track road by arc with the top of the second side plate 305 and connects, and arc carries track road and includes the first of pi/2 radian
Arc carries track road 310 and the second arc of pi/2 radian carries track road 311, and bottom plate, the first side plate 304, the second side plate 305 and arc carry track road
Form main chamber hole 315 altogether；The top of first side plate, 304 and second side plate 305 is hinged with the first arc lid 300 and second respectively
Arc lid 301,300 lower face of the first arc lid are fixedly connected with the first arc voltage body 308, and 301 lower face of the second arc lid is fixedly connected with
Second arc voltage body 309, the lower section of the first arc voltage body 308 are equipped with the first sensor fibre 312 carried positioned at arc in track road, the second arc voltage body
309 lower sections are equipped with the second sensor fibre 313, and the first arc lid 300 is connected with the second arc lid 301 by locking device；Rotate first
300 and second arc lid 301 of arc lid, the first sensor fibre 312 and the are compressed by the first arc voltage body 308 and the second arc voltage body 309
Two sensor fibres 313, after the first arc lid 300 and the second arc lid 301 locked by locking device, locking device can be screw,
The connectors such as bolt, or hasp.First arc voltage body 308 and the boss that the second arc voltage body 309 is strip, boss are cut
Face is arc-shaped.Close to the second side plate on the right side of second arc lid, in order to produce symmetry sound emission effect, in the upper end of the second side plate
Lay odd number and be total to chamber hexagon ring, and the number of chamber hexagon ring is 11 altogether, in order to exist with the common chamber circular hole on the first side plate
Create a difference when propagating acoustic emission wave, the common chamber hexagon ring on the second side plate is regular hexagon, in order to be realized with more preferable angle
The sympathetic response that sound emission is propagated, can better profit from passing information when acoustic emission source empathizes to common chamber circular hole and main common chamber hole
Pass sensor fibre.
The bottom of the left outside salient angle 302 of the positive triangular pyramid of three length of side 2cm equilateral triangles and length 5cm, width 1cm
The top end face of the first arc lid 300 be connected, left outside salient angle 302 mainly the present apparatus by it is embedded when increase and knot to be monitored
Friction between structure body, to strengthen the cooperative transformation ability between the present apparatus and structure to be measured, rotating the first arc lid 300 can be with
The first arc voltage body 308 is driven to move, top end face and length 5cm, the first arc of width 1cm of the first arc voltage body 308 of radian π/3
The bottom face of lid 300 is connected, and radian pi/2, radius carry track road 310, the load road of length 5cm for the first arc of 5cm arc forms
Membrane 314 and the first arc voltage body 308 of radian π/3 constitute three-legged structure, and the first arc voltage body 308 and the first arc carry track road 310
It is connected, which can effectively be fixed fixed first sensor fibre 312 of GJJV models, in this example altogether
Be configured with 11 a diameter of 3cm, section be circular configuration common chamber circular hole 306, this 11 common chamber circular holes 306 are at interval of distance
1cm formal distributions are 60 ° with horizontal sextant angle in length 20cm, the first side plate 304 of width 5cm, the first side plate 304, the first side
Plate 304 carries track road 310 with the first arc and is connected, and the high 2cm of perforate, the first of wide 4cm are offered in the middle and lower part of the first side plate 304
Outer access slot 316, the first outer access slot 316 are I-shaped opening, it is possible to reduce the interference in the embedded present apparatus.
In the present invention, 301 length 5cm of the second arc lid, width 1cm, right outer salient angle 303 is three length of side 2cm equilateral three
Angular triangular pyramid, the second side plate 305 is length 20cm, width 5cm, and 307 section of chamber hexagon ring is equilateral hexagon altogether,
Second outer 317 length of side of access slot be 1cm, the high 2cm of perforate, width 4cm, 309 radian π/3 of the second arc voltage body, the second arc load track road 311
It is 5cm arc forms for radian pi/2, radius, fixed second sensor fibre 313 of GJJV models.Fixed second sensing of GJJV models
Optical fiber 313 is laid in radian pi/2, radius is carried in track road 311 for the second arc of 5cm arc forms, the second arc voltage of radian π/3
The apical margin of body 309 connects with the bottom of length 5cm, the second arc lid 301 of width 1cm, length 5cm, the second arc lid of width 1cm
301 top end face is connected with the bottom face of the outer salient angle 303 in the right side of three length of side 2cm equilateral triangles, length 5cm, width 1cm
301 right side edge of the second arc lid be connected with the second side plate 305 of length 20cm, width 5cm, length 5cm, width 1cm
Second arc lid 301 is the supporting body as right outer salient angle 303, and the second arc voltage body 309 of radian π/3 also is pressed into the second arc carries
In track road 311, fixed second sensor fibre 313 of GJJV models is pressed into close to load using raised set of the second arc voltage body 309
At the position of road membrane, the section that length 20cm, the second side plate 305 of width 5cm are laid with equidimension successively from top to bottom is
11 common chamber hexagon rings 307 have been laid in equilateral hexagon, the common chamber hexagon ring 307 that the length of side is 1cm, the upper end of the second side plate 305,
Second side plate 305 is 60 ° with horizontal sextant angle, the second outer access slot 317 and the high 1cm of perforate, wide 5cm bottom outside access slot 318 be I-shaped
Shape opening, can reduce interference during embedded device.
A kind of a kind of operation method of distributed sensing fiber sound emission fusion sensory perceptual system described above, including following step
Suddenly：
(1) determine area to be measured, be equipped with component, load module
This example is special select northwest concrete dam exemplified by, a certain region to be measured of the concrete dam is certain upstream face 150m
The region of × 100m, its week a length of 500m, considers the purposes of possible bending and lead, it is 600m's to determine final three root longs degree
G.652D model sensor fibre, as the first sensor fibre 101, the second sensor fibre 102, the 3rd sensor fibre 103, according to from
The order of the temperature sensitive compensation device of sensor fibre, sensor fibre sound emission demodulating equipment, distributed sensing fiber sound emission is merged
Sensory perceptual system carries out the module that configuration is equipped with component, each device of assembling；
Since present invention demodulation basic principle is to use Brillouin scattering technology, Brillouin scattering technology needs a closure
Circuit, i.e. sensor fibre must be from sensor fibre sound emission demodulating equipment, by the temperature sensitive compensation device of sensor fibre, most
After return again to sensor fibre sound emission demodulating equipment, the head and the tail of the sensor fibre in the temperature sensitive compensation device of sensor fibre are needed with passing
Photosensitive fibre sound emission demodulating equipment connection
(2) closing device is debugged with first operation
Will G.652D the first sensor fibre of model 101 respectively by it is upper hold fine groove 104, transition microscope carrier section 107, boss 110,
Lower arc end fastener 118, arc-shaped housing 116, and by holding fine groove 104 and boss 110 progress injecting glue to upper, carry out initial end
It is fixed, after by adjusting lower horizontal thread control column 115 and upper horizontal thread control column 114 by upper arc end fastener 112 and lower arc end
Fastener 118 is moved adjacent at boss 110, and rotation lock fibre threaded post 113 carries out pre-tensile stress to upper arc end fastener 112
Set, the 3rd sensor fibre 103 be deployed to transition microscope carrier section 107, at lower wedge-shaped microscope carrier section 109 with same operating method,
For the second sensor fibre 102, mainly led in the first logical fine logical fine pipe 124 of pipe 122 and second, and it is logical to first
The logical fine pipe 124 of fine pipe 122 and second is packaged, and first operation debugging, is come by using the strain value of the second sensor fibre 102
The average value of the first sensor fibre 101 and 103 strain value of the 3rd sensor fibre is corrected, and then establishes most reliable no temperature interference
Sensor fibre monitoring strain numerical value；
(3) embedded device is completed to lay
By rotating length 5cm, the first arc lid 300 of width 1cm and length 5cm, the second arc lid 301 of width 1cm can
To drive the movement of the second arc voltage body 309 of the first arc voltage body 308 of radian π/3 and radian π/3, the first arc voltage of radian π/3
The load road membrane 314 that body 308 carries track road 310 and length 5cm with radian pi/2, radius for the first arc of 5cm arc forms forms three
Form is laid at angle, and the second arc voltage body 309 of radian π/3 carries track road 311 with radian pi/2, radius for the second arc of 5cm arc forms
Triangle, which is formed, with the load road membrane 314 of length 5cm lays form, and the of the first arc voltage body 308 of radian π/3 and radian π/3
Two arc voltage bodies 309 are intermediate projections structure, can be by the first sensor fibre 101 of G.652D model and the 3rd sensor fibre 103
Be fixed in a manner of nonrigid, by the high 2cm of perforate, the first outer access slot 316 of wide 4cm, the high 2cm of perforate, wide 4cm second
Outer access slot 317 and the high 1cm of perforate, wide 5cm bottom outside access slot 318 be each passed through reinforcement component in structure to be measured, complete base
This laying process, the first sensor fibre 101 and the 3rd sensor fibre 103 are from sensor fibre sound emission demodulating equipment, warp
The temperature sensitive compensation device of sensor fibre is crossed, finally returns again to sensor fibre sound emission demodulating equipment, the temperature sensitive compensation device of sensor fibre
In sensor fibre head and the tail need with sensor fibre sound emission demodulating equipment connect；
(4) switch, initial value monitoring are opened
By controlling controller 426 to start driving power 417, so as to encourage mode-locked laser 418 to produce femtosecond laser light
Frequency comb 419 is learned, by pulse-modulator 420, wavelength division multiplexer 421, Light splitter toy 432 into realization to femtosecond laser optical frequency
Comb 419 modulation, by detector 425, Rayleigh optical receiver 430, Brillouin light receiver 431, receiver 424 can to change
Rayleigh scattering optical information and the femtosecond laser optical frequency com 419 of Brillouin scattering optical information received and detected, it will
The optical information reference point initial as this region to be measured；
(5) dynamic monitoring and analysis
There is damage in somewhere in the concrete dam structure, can produce acoustic emission signal, passes through five jiaos of common chamber mesh, three
Angle be total to chamber mesh, circle altogether chamber mesh and four sides be total to acoustic emission signal that chamber mesh is propagated can be according to different Time And Frequencies
It is transmitted to and carries in the fine G.652D model sensor fibre for laying module, G.652D the Rayleigh scattering optical information in model sensor fibre
Change can be produced with Brillouin scattering optical information, by controller 426, by the Rayleigh scattering optical information of change and Brillouin scattering
Optical information is pooled in concrete body safety characteristics evaluation system 427, and is compared and analyzed with the result of (4) step,
The degree of evaluation structure bulk damage and position, realize dynamic monitoring and analysis.
The above is only the preferred embodiment of the present invention, it should be pointed out that：For the ordinary skill people of the art
For member, various improvements and modifications may be made without departing from the principle of the present invention, these improvements and modifications also should
It is considered as protection scope of the present invention.
Claims (9)
1. sensory perceptual system is merged in distributed sensing fiber sound emission, it is characterised in that：Including the temperature sensitive compensation device of sensor fibre and
Sensor fibre sound emission demodulating equipment, sensor fibre are temperature sensitive by sensor fibre from sensor fibre sound emission demodulating equipment
Compensation device, finally returns again to sensor fibre sound emission demodulating equipment, the sensor fibre in the temperature sensitive compensation device of sensor fibre
Head and the tail need to connect with sensor fibre sound emission demodulating equipment；
The temperature sensitive compensation device of sensor fibre includes load fibre and leads gang mould block and temperature sensitive compensating module, and the load fibre is led in gang mould block
Through the first sensor fibre, the second sensor fibre and the 3rd sensor fibre, carry fibre and lead gang mould block and be equipped with and fix the first sense light
Fine and the 3rd sensor fibre built-in solid fiber module, the first sensor fibre and the 3rd sensor fibre are fixed by built-in solid fiber module
It is arranged in parallel afterwards with the second sensor fibre；First sensor fibre and the 3rd sensor fibre are located at the upper table of arc-shaped housing
Face, the second sensor fibre are passed through to be fixed on another after temperature compensation means and carry fibre and led on gang mould block, the first sensor fibre and the
Three sensor fibres are fixed on load fibre by solid fiber module built in another pair and lead on gang mould block；
The sensor fibre sound emission demodulating equipment includes driving power, mode-locked laser, femtosecond laser optical frequency com, pulse
Modulator, wavelength division multiplexer, light path coupler, amplifier, receiver, detector, controller, concrete body safety characteristics
Evaluation system, Rayleigh optical receiver, Brillouin light receiver, Light splitter toy, the output terminal and mode-locked laser of the driving power
Input terminal connection, the output terminal of the input terminal of driving power and controller connects, and the mode-locked laser swashs with femtosecond successively
Light optical frequency com, pulse-modulator are connected with wavelength division multiplexer, the output terminal input with Light splitter toy respectively of wavelength division multiplexer
End is connected with the input terminal of light path coupler, the output terminal of the Light splitter toy input terminal with Rayleigh optical receiver and Brillouin respectively
The input terminal connection of optical receiver, the output terminal of Rayleigh optical receiver and the output terminal of Brillouin light receiver and controller it is defeated
Enter end connection, the output terminal of light path coupler and the input terminal of the input terminal of amplifier and receiver connect, the output of receiver
End is connected with the input terminal of detector, and the output terminal of detector is connected with the input terminal of controller, the output terminal of amplifier
It is connected with optical fiber voice sending sensor device, controller output end is connected with concrete body safety characteristics evaluation system.
2. sensory perceptual system is merged in distributed sensing fiber sound emission according to claim 1, it is characterised in that：The optical fiber
Voice sending sensor device includes bottom plate and the first side plate and the second side plate that are fixedly connected with bottom plate both sides, the first side plate and second
The napex of side plate carries track road by arc and connects, and bottom plate, the first side plate, the second side plate and arc carry track road and form main chamber hole altogether；It is described
The top of first side plate and the second side plate is hinged with the first arc lid and the second arc lid respectively, and the first arc lid lower face is fixedly connected with
First arc voltage body, the second arc lid lower face are fixedly connected with the second arc voltage body, are equipped with below the first arc voltage body and carry track road positioned at arc
The 4th interior sensor fibre, the second arc voltage body lower section are equipped with the 5th sensor fibre, the first arc lid and the second arc lid and pass through locking dress
Put connection；The first arc lid and the second arc lid are rotated, the 4th sensor fibre and the are compressed by the first arc voltage body and the second arc voltage body
Five sensor fibres, after pass through locking device and lock the first arc lid and the second arc lid.
3. sensory perceptual system is merged in distributed sensing fiber sound emission according to claim 2, it is characterised in that：Described first
Several first through hole are equipped with along the 4th sensor fibre axis direction, on side plate along the 5th sensor fibre axis on second side plate
Line direction is equipped with several second through holes.
4. sensory perceptual system is merged in distributed sensing fiber sound emission according to claim 3, it is characterised in that：Described first
Through hole is that chamber circular hole, common chamber circular hole section are circular hole altogether, and the second through hole is common chamber hexagon ring, and chamber hexagon ring section is hexagonal altogether
Hole, first through hole and the second through hole are odd number.
5. sensory perceptual system is merged in distributed sensing fiber sound emission according to claim 1, it is characterised in that：It is described to carry fibre
Lead gang mould block include optical fiber hold microscope carrier, it is upper hold fine groove, it is middle hold fine groove, it is lower hold fine groove, transition microscope carrier section, upper wedge-shaped microscope carrier section, under
Wedge-shaped microscope carrier section, wherein, upper fine groove, the fine groove of middle appearance, the fine groove of lower appearance of holding is laid in optical fiber and holds in microscope carrier successively from top to bottom, and first
Sensor fibre, the second sensor fibre and the 3rd sensor fibre are sequentially fixed in the fine groove of appearance, the fine groove of middle appearance, the fine groove of lower appearance, light
Fibre holds microscope carrier and is connected by transition microscope carrier section with upper wedge-shaped microscope carrier section, lower wedge-shaped microscope carrier section.
6. sensory perceptual system is merged in distributed sensing fiber sound emission according to claim 5, it is characterised in that：It is described built-in
Gu fiber module includes the fine threaded post of upper arc end fastener, lower arc end fastener, lock, upper horizontal thread control column, lower horizontal thread control
Column, boss and a pair of of sliding block, the different built-in boss consolidated in fiber module is respectively positioned at upper wedge-shaped microscope carrier section and lower wedge shape
Microscope carrier section, boss are flexibly connected with upper horizontal thread control column and lower horizontal thread control column, the upper horizontal thread control column and lower horizontal stroke
It is threadedly coupled respectively with a pair of of sliding block to screw thread control column, the fine threaded post of lock is threadedly coupled with one of sliding block, under described
Arc end fastener is fixedly connected with another sliding block.
7. sensory perceptual system is merged in distributed sensing fiber sound emission according to claim 6, it is characterised in that：The circular arc
Shape housing includes three layers, and one layer of outermost is special type composite material layer, and intermediate layer is metal separate slot layer, and innermost layer is compound for internal layer
Material layer.
8. sensory perceptual system is merged in distributed sensing fiber sound emission according to claim 7, it is characterised in that：The temperature
Compensating module includes the spheroid that a pair of of arc composite bodies are formed, and two spheroids are located at the both ends of arc-shaped housing, ellipsoid
The the first logical fine pipe passed through in vivo equipped with the second sensor fibre, is equipped with calabash shaped made of composite material between two spheroids
Cucurbit body, be equipped with the second logical fine pipe in cucurbit body, the second sensor fibre sequentially passes through the first logical fine pipe, the second logical fine pipe and another
One first logical fine pipe, spheroid and cucurbit body are supported in arc-shaped housing by inner support column.
9. a kind of operation method of distributed sensing fiber sound emission fusion sensory perceptual system as claimed in claim 8, its feature
It is, comprises the following steps：
The first step, be equipped with three it is to be monitored by the use of sensor fibre be used as the first sensor fibre, the second sensor fibre and the 3rd sensing
Optical fiber, makes arc-shaped housing, is equipped with special type composite material and spheroid, and require special type composite material layer with by these materials
Corresponding first sensor fibre and the 3rd sensor fibre of material, by the first sensor fibre, the second sensor fibre and the 3rd sensor fibre
Hold upper appearance fibre groove, the fine groove of middle appearance, the fine groove of lower appearance on microscope carrier by optical fiber at the temperature sensitive compensation device initial end of sensor fibre respectively
In, and glue is injected separately into the fine groove of upper appearance, the fine groove of middle appearance, lower appearance fibre groove, the temperature sensitive compensation device of sensor fibre will be penetrated
Three sensor fibres initial end at be fixed, after by the first sensor fibre and the 3rd sensor fibre with certain radian mistake
Cross to transition microscope carrier section, the second sensor fibre level is stretched into the first logical fine pipe and the second logical fine pipe, and it is logical to first
Fibre pipe and the second logical fine pipe are packaged；
Second step, the first sensor fibre is transitioned into boss by the first sensor fibre by 60 ° of angle of angle with horizontal plane,
And inject glue in boss and fixed the first sensor fibre again, the lock fibre threaded post for being distributed in head and the tail both ends drives
The movement of arc end fastener, the elongation that the first sensor fibre is carried out to pre-tensile stress is fixed, and is injected in arc-shaped housing
First sensor fibre is deployed in the special type composite material layer being in contact with it by glue, and same cloth is carried out to the 3rd sensor fibre
If the second sensor fibre is led in the first logical fine pipe and the second logical fine pipe, and to the first logical fine pipe and the second logical fine pipe into
Row encapsulation, and the first sensor fibre, the second sensor fibre and the 3rd sensor fibre is passed through the temperature sensitive compensation device of sensor fibre
Upper appearance fibre groove, the fine groove of middle appearance, the fine groove of lower appearance on the optical fiber appearance microscope carrier of end, and the fine groove of upward appearance, the fine groove of middle appearance, lower appearance fibre groove
Glue is injected, and then completes the operation of sensor fibre temperature-insensitiveization, and the device is buried, completes final sensing dress
Put laying；
3rd step, all parts of sensor fibre sound emission demodulating equipment are opened, by controlling controller to start driving power,
So as to encourage mode-locked laser to produce femtosecond laser optical frequency com, realized by pulse-modulator, wavelength division multiplexer, Light splitter toy
Modulation to femtosecond laser optical frequency com；
4th step, in order to more accurately remove the interference of temperature, will pass through processed first sensor fibre of special type composite material
It is averaged with the 3rd sensor fibre strain value, the accurate sensor fibre strain value obtained as first time is rear to use
The strain value of second sensor fibre corrects the average of the first sensor fibre and the 3rd sensor fibre strain value, as final
The strain value that the sensor fibre that going temperature influences monitors；
5th step, when structure somewhere to be measured is damaged, can produce acoustic emission signal, and the acoustic emission signal passed through can be according to
Different Time And Frequencies is transmitted in common chamber circular hole, altogether chamber hexagon ring and main chamber hole altogether, the Rayleigh scattering light in sensor fibre
Information and Brillouin scattering optical information can have an impact, by Rayleigh optical receiver, Brillouin light receiver, receiver can to become
The Rayleigh scattering optical information of change and the femtosecond laser optical frequency com of Brillouin scattering optical information are received and detected, after pass through
Controller is pooled in concrete body safety characteristics evaluation system and is analyzed and studied, position to structure bulk damage,
Degree information is assessed and analyzed.
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| CN105891337B (en) * | 2016-06-22 | 2017-05-03 | 河海大学 | Device and method for arranging concrete structure service behavior acoustic emission sensing appliances with optical fibers |
| CN107422037A (en) * | 2017-09-05 | 2017-12-01 | 北京航空航天大学 | A kind of matching Fiber Bragg Grating FBG of contrast type surveys ultrasonic signal method for sensing |
| CN111579639B (en) * | 2020-05-19 | 2021-08-31 | 福州大学 | Measuring point layout method for scanning defects of underwater pile of bridge through imaging sonar |
| CN113566753B (en) * | 2021-07-19 | 2022-08-05 | 福州大学 | Measuring point layout method based on mechanical scanning imaging sonar scanning bridge pier foundation scouring |
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