CN106198750B - Hydro-concrete Structures military service condition optical fiber sound emission sensing device and method - Google Patents
Hydro-concrete Structures military service condition optical fiber sound emission sensing device and method Download PDFInfo
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- CN106198750B CN106198750B CN201610481035.0A CN201610481035A CN106198750B CN 106198750 B CN106198750 B CN 106198750B CN 201610481035 A CN201610481035 A CN 201610481035A CN 106198750 B CN106198750 B CN 106198750B
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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
- 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
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Abstract
The invention discloses Hydro-concrete Structures military service condition optical fiber sound emission sensing device and methods, the device includes sensor fibre sound emission installation aiding device and acoustic emission source, installation aiding device includes bottom plate, the first side plate and the second side plate, the top of first side plate and the second side plate carries track road by arc and connects, and the first side plate and the second side plate form 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 lid respectively, first arc lid lower face is fixedly connected with the first arc voltage body, second arc lid lower face is fixedly connected with the second arc voltage body, the first sensing light is equipped with below first arc voltage body, the second sensor fibre is equipped with below the second arc voltage body.The present invention generates crack in structure, acoustic emission wave is to common chamber circular hole, chamber hexagon ring and the Time And Frequency of the main sympathetic response that chamber hole generates altogether are all different altogether, therefore these information can have the characteristics that high-precision, high spatial resolution, distribution, synchronism by from physically secondary amplification and delay.
Description
Technical field
The present invention relates to Hydro-concrete Structures military service condition optical fiber sound emission sensing device and methods, belong to concrete knot
Structure safety monitoring and field of detecting.
Background technology
Since Corning Incorporated produces first low loss fiber, optical fiber communication technology is grown rapidly,
Various novel optical devices, photoelectric device are also constantly developed, at this point, optical fiber sensing technology starts rudiment, 1977
Research institute of USN (NRL) starts to perform plans (fibre optical sensor system by the Foss that Charles doctors M.Davis preside over
System), it comes out since this fibre optical sensor, the technologies such as subsequent OTDR, BOTDA, FBG are constantly proposed, Fibre Optical Sensor skill
Art is increasingly taken seriously and utilizes, but due to its spatial discrimination is too low, big transmission range when the factors such as light loss is excessively high, it is serious to hinder
Optical fiber sensing technology is hindered towards miniaturization, long-range, distribution, high-precision development；
When stress, temperature, burn into load are when extraneous factors interfere concrete body, material internal can produce
Situations such as raw fracture or deformation, at this time structure can release it is elastic can and with regard to sound emission, acoustic emission is substantially
It says, exactly perceives and acquire these acoustic emission signals using some acoustic emission sensors, these sound are sent out with discrimination by storage
Penetrate signal infer in structure it is that may be present damage and destroy, finally the military service condition of concrete body is provided and is sentenced
Disconnected, acoustic emission has many advantages, such as dynamic, sensibility, globality, but there are still more defects, such as signal transmission
It is serious to hamper its development apart from the shortcomings of short, monitoring content is few, anti-electromagnetic interference capability is poor；
Therefore, how sensor fibre technology with acoustic emission to be merged, learnt from other's strong points to offset one's weaknesses, to a greater degree raising pair
The monitoring of concrete body and detectivity currently have some Jie merged about sensor fibre technology with acoustic emission
It continues, but there is great number of issues, substantially FBG is merged with acoustic emission, and FBG is merged with acoustic emission can not achieve point
Cloth monitors and detection, it is impossible to respective advantage is given full play to, about merging for distributed sensing fiber technology and acoustic emission
It is even more rare and helpless for structural damage invisible or small in concrete structure body,
Therefore, it is necessary to research and develop a kind of high-precision, high spatial resolution, remote monitoring novel distributed sensing fiber
The new technology that technology is merged with acoustic emission.
Invention content
Goal of the invention：In order to overcome the deficiencies in the prior art, the present invention provides a kind of Hydro-concrete Structures clothes
Condition optical fiber sound emission sensing device and method are used as a servant, there is high-precision, high spatial resolution, distribution, synchronism, it can
Realize structure in micro-structure damage detected with high accuracy and monitoring, lay flexibly, conveniently moving, reduce monitoring into
Originally, improving monitoring accuracy and promoting practical application ability etc. has outstanding advantage
Technical solution：In order to solve the above technical problems, the Hydro-concrete Structures military service condition optical fiber sound emission of the present invention
Sensing device, including several sensor fibre sound emission installation aiding devices and acoustic emission source, dress is laid in the sensor fibre sound emission
It puts comprising bottom plate and the first side plate and the second side plate that are fixedly connected with bottom plate both sides, the top of the first side plate and the second side plate leads to
It crosses arc and carries track road connection, bottom plate, the first side plate, the second side plate and arc carry track road and form main chamber hole altogether；First side plate and
The top of two side plates is hinged with the first arc lid and the second arc lid respectively, and the first arc lid lower face is fixedly connected with the first arc voltage body,
Second arc lid lower face is fixedly connected with the second arc voltage body, and the first sensing being located in arc load track road is equipped with below the first arc voltage body
Optical fiber, the second arc voltage body lower section are equipped with the second sensor fibre, and the first arc lid and the second arc lid are connected by locking device；Rotation the
One arc lid and the second arc lid compress the first sensor fibre and the second sensor fibre by the first arc voltage body and the second arc voltage body, after
First arc lid and the second arc lid are locked by locking device；The acoustic emission source is in the first sensor fibre and the second sensor fibre
One end connects, and the other end of the first sensor fibre and the second sensor fibre is connect with receiver, receiver successively with optical detector,
Second amplifier, signal processor, memory are connected with concrete body monitoring and evaluation information system.
Preferably, further include laser light source, laser light source passes sequentially through mode-locked laser, polarization beam apparatus, non-linear
Amplifier, spectrometer, Michelson's interferometer, femtosecond pulse, boundary filter, the first amplifier are connected with Light splitter toy, light point
Device is connect with the first sensor fibre and the second sensor fibre.
Preferably, the first sensor fibre of the first side plate upper edge axis direction is equipped with several first through hole.
Preferably, the second sensor fibre of the second side plate upper edge axis direction is equipped with several second through-holes.
Preferably, the first through hole is that chamber circular hole, common chamber circular hole section are circular hole altogether, the second through-hole is chamber hexagonal altogether
Hole, chamber hexagon ring section is hexagon ring altogether, and first through hole and the second through-hole are odd number.
Preferably, the first arc lid and the second arc cover and are equipped with salient angle.
Preferably, the outer surface of the bottom plate, the first side plate and the second side plate is equipped with outer access slot.
Preferably, it is separated between first sensor fibre and the second sensor fibre by carrying diaphragm.Carry road diaphragm
Most important effect is to separate the first sensor fibre and the second sensor fibre, and is used as the first sensor fibre and the second sense light
Fine support end.It is preferably rigid plastic body to carry road diaphragm material.
A kind of method of Hydro-concrete Structures military service condition optical fiber sound emission sensing device, includes the following steps：
The first step, the sound emission of structure sensor fibre lay various components in module, are equipped with the sensor fibre of certain length, turn
Dynamic first side plate and the second side plate, the form that composition angle with horizontal plane is 60 °, and then form main chamber hole altogether；
Second step rotates the movement that the first arc lid and the second arc cover strip move the first arc voltage body and the second arc voltage body, by the
First sensor fibre and the second sensor fibre are pressed into arc and carried by the position of one arc voltage body and the second arc voltage body intermediate projections respectively
In track road, four sensor fibre sound emission installation aiding devices are deployed in concrete body to be measured by outer access slot；
Third walks, and all parts are opened, each component is debugged, and four to being laid in concrete body
The first sensor fibre and the second sensor fibre in sensor fibre sound emission installation aiding device are calibrated and are demarcated, and pass through laser light
Source carries out the first sensor fibre and the second sensor fibre the modulation of femtosecond pulse；
4th step, when concrete body generates acoustic emission source under extraneous load action, the sound hair in acoustic emission source
The femtosecond arteries and veins of the first sensor fibre and the second sensor fibre that ejected wave will be influenced in four sensor fibre sound emission installation aiding devices
Wash information off, and the acoustic emission wave Time And Frequency of sympathetic response that chamber circular hole, altogether chamber hexagon ring and main common chamber hole generate together is not
Together, these information can be transmitted by from physically secondary amplification and delay by secondary amplification with the acoustic emission information postponed
To the first sensor fibre and the second sensor fibre；
5th step is received and is detected to the femtosecond pulse optical information of variation by receiver, optical detector, after by
The femtosecond pulse optical information of variation is carried out denoising and data storage, and then converge to coagulation by signal processor and memory
In soil structured body monitoring and evaluation information system；
6th step draws the variation time-histories of the femtosecond pulse optical information in concrete body monitoring and evaluation information system
Curve reflects the variation of acoustic emission wave caused by acoustic emission source, and then realizes and concrete body is dynamically monitored and examined
It surveys.
The present invention will detect the sensor fibre technology essence of acoustic emission wave using fusion femtosecond pulse technology and acoustic emission
Degree is promoted to mm grades, and is initiated and constructed a kind of sensor fibre sound hair for merging main chamber hole altogether, altogether chamber hexagon ring and common chamber circular hole
Laying device is penetrated, the monitoring of multi-layer high-precision identification is created with detecting the new technique merged, water conservancy and building is led
The health monitoring of the concrete structure in domain provides important guarantee with detection, has great practical engineering application value.
Advantageous effect：The Hydro-concrete Structures military service condition optical fiber sound emission sensing device of the present invention is produced in structure
During the structural damage of raw crack or other forms, acoustic emission wave is to common chamber circular hole, chamber hexagon ring and main chamber hole altogether generate altogether
The Time And Frequency of sympathetic response is all different, therefore on the other hand these information, can be adopted by from physically secondary amplification and delay
Spatial resolution can be increased to mm grades with mm grades of femtosecond pulse technologies, different acoustic emission informations can pass to the first sensing
Optical fiber and the second sensor fibre, and then pass through high spatial resolution the first sensor fibre of low detection and the second sensor fibre optical information
Variation realize that the internal injury of structure and the detection of microlesion and monitoring there is high-precision, high spatial resolution, divide
The features such as cloth, synchronism.
Description of the drawings
Fig. 1 is the structure chart of the present invention；
Fig. 2 is the structure diagram of mobile device in Fig. 1；
Wherein：The right outer salient angle of the first arcs of 300- lid, the second arcs of 301- lid, the left outside salient angles of 302-, 303-, the first sides of 304-
Plate, the second side plates of 305-, 306- are total to chamber circular hole, 307- is total to chamber hexagon ring, the first arc voltages of 308- body, the second arc voltages of 309- body,
The first arcs of 310- carry track road, the second arcs of 311- carry track road, the first sensor fibres of 312-, the second sensor fibres of 313-, 314- carry road
Diaphragm, 315- master are total to chamber hole, the first outer access slots of 316-, the second outer access slots of 317-, access slot, 319 laser light sources, 320- outside 318- bottoms
Mode-locked laser, 321- polarization beam apparatus, 322- nonlinear amplifiers, 323- spectrometers, 324- Michelson's interferometers, 325-
Femtosecond pulse, 326- boundary filters, the first amplifiers of 327-, 328- Light splitter toy, 329- concrete body monitoring and evaluations
Information system, 330- memories, 331- signal processors, the second amplifiers of 332-, 333- optical detectors, 334- receivers,
335- sensor fibre sound emissions installation aiding device, 336- acoustic emission sources, 337- concrete bodies, 338- external worlds load.
Specific embodiment
As shown in Figure 1 to Figure 2, in order to which preferably the concrete application of the present invention is described, special certain height of fixed China is mixed
The situation in crack is likely to occur inside at solidifying earth dam dam heel, will be taken based on the Hydro-concrete Structures of sensor fibre acoustic emission
It uses as a servant at the embedding Mr. Yu's High Concrete Dam dam heel of condition optical fiber sound emission sensing device, it is existing special by the specific Practical Project of the present apparatus
Using the careful description of progress.
A kind of Hydro-concrete Structures military service condition optical fiber sound emission sensing device lays mould including sensor fibre sound emission
Block, sensor fibre module harmony transmitting module, sensor fibre module are monitored by concrete body with commenting with sound emission module
Estimate information system to be connected, sensor fibre sound emission lays module and includes four sensor fibre sound emission installation aiding devices, each
Fixed first sensor fibre 312 of GJJV models and GJJV models fixed second are laid in sensor fibre sound emission installation aiding device
Sensor fibre 313 can generate different degrees of crack under water ballast(ing) effect inside the heel of High Concrete Dam dam, but from it is apparent simultaneously
It cannot find, it is therefore desirable to which detection is likely to occur internal microcosmic crack, and acoustic emission source 336 is by sound emission in sound emission module
Wave passes to sensor fibre sound emission and lays fixed first sensor fibre 312 of GJJV models and GJJV models fixed second in module
Sensor fibre 313, fixed first sensor fibre 312 of GJJV models and fixed second sensor fibre 313 of GJJV models and sound emission
The input terminal of receiver 334 is connected in module, after successively by optical detector 333, the second amplifier 332, signal processor
331 and memory 330, finally it is connected with concrete body monitoring and evaluation information system 329.
In the present embodiment, laser light source 319 can send out laser pulse, and the output terminal of laser light source 319 swashs with locked mode
The input terminal of light device 320 is connected, and can generate ultrashort laser pulse using mode-locking technique, the width of laser pulse is shortened to
Femtosecond magnitude generates high pulse width and performance number, the output terminal of mode-locked laser 320 and the input of polarization beam apparatus 321
End is connected, and the output terminal of polarization beam apparatus 321 is connected with the input terminal of nonlinear amplifier 322, nonlinear amplifier 322
Output terminal connect with the input terminal of spectrometer 323, using spectrometer 323, pass through the optical detectors such as photomultiplier and measure spectrum
The device of line different wave length position intensity, the output terminal of spectrometer 323 are connect with the input terminal of Michelson's interferometer 324, are stepped
The femtosecond pulse that Ke Erxun interferometers 324 export is after the input terminal of boundary filter 326 into the defeated of the first amplifier 327
Enter end, the output terminal of the first amplifier 327 is connect with the input terminal of Light splitter toy 328, the output terminal of Light splitter toy 328 and four sensings
The first sensor fibre 312 in optical fiber sound emission installation aiding device 335 is connected with the input terminal of the second sensor fibre 313.
In the present embodiment, each sensor fibre sound emission installation aiding device includes with lower component：Three length of side 2cm equilateral three
Angular left outside salient angle 302, the first arc voltage body 308 of radian π/3, radian pi/2, radius are carried for the first arc of 5cm arc forms
Track road 310, fixed first sensor fibre 312 of GJJV models, a diameter of 3cm, section are the common chamber circular holes 306 of circular configuration, long
Spend the first side plate 304 of 20cm, width 5cm, length 5cm, width 1cm the first arc lid 300, the high 2cm of trepanning, wide 4cm the
One outer access slot 316, length 5cm, width 1cm the second arc lid 301, the outer salient angle 303 in the right side of three length of side 2cm equilateral triangles,
The second side plate 305 of length 20cm, width 5cm, the common chamber hexagon ring 307 that section is equilateral hexagon, the length of side is 1cm, trepanning
The second outer access slot 317 of high 2cm, wide 4cm, the second arc voltage body 309 of radian π/3, radian pi/2, radius are 5cm arc forms
Second arc carry track road 311, fixed second sensor fibre 313 of GJJV models, the high 1cm of trepanning, wide 5cm bottom outside access slot 318.
First arc lid 300 is connected with the second arc lid 301 by locking device, and locking device can be that screw, bolt etc. connect
Fitting, or hasp.Fixed first sensor fibre 312 of GJJV models and fixed second sensor fibre 313 of GJJV models are put
Track road 310 is carried to the first arc that radian pi/2, radius are 5cm arc forms and radian pi/2, radius are 5cm arc forms second
Arc is carried in track road 311, and the first arc voltage body 308 of radian π/3 and the second arc voltage body 309 of radian π/3 carry fibre with the first arc respectively
Road 310 carries track road 311 with the second arc and is connected, and 305 are laid with common chamber circle 306 respectively on the first side plate 304 and the second side plate
With common chamber hexagon ring 307, the first side plate 304 and the second side plate 305 carry 310 and second arc of track road with the first arc respectively and carry track road
311 are connected, and radian pi/2, radius are the second arc load track road 311 of 5cm arc forms and radian pi/2, radius are 5cm arc-shaped
First arc of formula is to carry road diaphragm, length 20cm, the first side plate 304 of width 5cm and length 20cm, width between carrying track road 310
Spend between the second side plate 305 of 5cm and form main chamber hole 315 altogether, by the high 2cm of trepanning, wide 4cm the first outer access slot 316, open
The high 2cm in hole, the second outer access slot 317 of wide 4cm, the high 1cm of trepanning, wide 5cm bottom outside access slot 318 sensor fibre sound emission is laid
Device is installed in structure to be measured.
In the present embodiment, when height of water level is 100m, the lower High Concrete Dam dam heel of 100m head pressures effect is internal to produce
The different crack of different degrees of length has been given birth to, at this point, the different crack of length, which can encourage, generates acoustic emission source 336, has been laid in
Fixed first sensor fibre, 312 He of GJJV models inside concrete body in four sensor fibre sound emission installation aiding devices
The optical information of fixed second sensor fibre 313 of GJJV models can generate with the acoustic emission wave that raw sound occurring source 336 generates without
Change disconnectedly, the light signal output end of the first sensor fibre 312 and the second sensor fibre 313 and the input terminal phase of receiver 334
Connection, the output terminal of receiver 334 are connect with the input terminal of optical detector 333, the output terminal of optical detector 333 and the second amplification
The input terminal connection of device 332, the output terminal of the second amplifier 332 are connected with the input terminal of signal processor 331, signal processing
The output terminal of device 331 is connected with the input terminal of memory 330, by memory 330 will constantly with acoustic emission wave change and
Optical information on the first sensor fibre 312 and the second sensor fibre 313 of variation carries out real-time storage, and be constantly output to mixed
In Xtah Crude Clay structure body monitoring and evaluation information system 329.
A kind of Hydro-concrete Structures military service condition optical fiber sound emission cognitive method as described above, includes the following steps：
(1) length of sensor fibre in optical fiber sound emission installation aiding device is determined
It is that emphasis is needed to consider for acting on 100m head pressures the heel of lower High Concrete Dam dam, needs to strengthen what is monitored
Therefore intensity and density, select 8 fixed sensor fibres of GJJV models of 500m altogether as four sensor fibre sound emission cloth
If the first sensor fibre 312 and fixed second sensor fibre 313 of GJJV models in device；
(2) optical fiber sound emission installation aiding device is configured to structure body region to be measured
To form main chamber hole 315 altogether, by length 20cm, the first side plate 304 of width 5cm and length 20cm, width 5cm
Second side plate 305 is laid in the form of angle with horizontal plane is 60 °, by the first sensor fibre 312 and the second sensor fibre
313, which are placed into the first arc, carries in 310 and second arc of track road load track road 311, rotates the first arc lid 300 of length 5cm, width 1cm
With length 5cm, the second arc lid 301 of width 1cm, by the first arc voltage body 308 of radian π/3 and the second arc voltage body of radian π/3
309 are pressed into the of the radian pi/2 for including the first sensor fibre 312 and the second sensor fibre 313, radius for 5cm arc forms
One arc carries 310 and second arc of track road and carries in track road 311；
(3) all parts in sensor fibre module harmony transmitting module are configured
Successively according to laser light source 319, mode-locked laser 320, polarization beam apparatus 321, nonlinear amplifier 322, spectrum
Instrument 323, Michelson's interferometer 324, boundary filter 326, the first amplifier 327, Light splitter toy 328 sequence by sensor fibre
Module is assembled, then according to receiver 334, optical detector 333, the second amplifier 332, signal processor 331, memory
330 sequence assembles sound emission module, after each component opened debug, check component operation conditions；
(4) each switch is opened to be monitored and detect
First under initial situation, each switch is opened, the lower four sensor fibre sound emissions of original state is obtained and lays dress
The optical information numerical value of fixed first sensor fibre 312 of middle GJJV models and fixed second sensor fibre 313 of GJJV models is put, by it
As initial value, later end value can carry out initial interference and handle, in this engineering at dam heel by subtracting the initial value
There are during the structural damage of crack or other forms, acoustic emission wave is to common chamber circular hole 306, common chamber hexagon ring 307 and main chamber altogether
The Time And Frequency that hole 315 is empathized is all different, therefore these information can be amplified and postponed from physically secondary, no
Same acoustic emission information can pass to the first sensor fibre 312 and the second sensor fibre 313, and then by detecting the first sense light
The detection and monitoring called in person to dam are realized in the variation of fibre 312 and 313 optical information of the second sensor fibre.
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. Hydro-concrete Structures military service condition optical fiber sound emission sensing device, it is characterised in that：Including several sensor fibres
Sound emission installation aiding device and acoustic emission source, the sensor fibre sound emission installation aiding device, which includes bottom plate and fixed with bottom plate both sides, to be connected
The top of the first side plate and the second side plate connect, 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 carry track road and form main chamber hole altogether；The top of first side plate and the second side plate is hinged with first respectively
Arc lid and the second arc 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
Two arc voltage bodies are equipped with below the first arc voltage body and are located at arc and carry the first sensor fibre in track road, and the is equipped with below the second arc voltage body
Two sensor fibres, the first 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 first
Arc voltage body and the second arc voltage body compress the first sensor fibre and the second sensor fibre, after by locking device lock the first arc lid and
Second arc lid；The acoustic emission source is connect with one end of the first sensor fibre and the second sensor fibre, the first sensor fibre and
The other end of two sensor fibres is connect with receiver, receiver successively with optical detector, the second amplifier, signal processor, deposit
Reservoir is connected with concrete body monitoring and evaluation information system.
2. Hydro-concrete Structures military service condition optical fiber sound emission sensing device according to claim 1, it is characterised in that：
Laser light source is further included, laser light source passes sequentially through mode-locked laser, polarization beam apparatus, nonlinear amplifier, spectrometer, mikey
Your inferior interferometer, femtosecond pulse, boundary filter, the first amplifier are connected with Light splitter toy, Light splitter toy and the first sensor fibre and
Second sensor fibre connects.
3. Hydro-concrete Structures military service condition optical fiber sound emission sensing device according to claim 1, it is characterised in that：
The first sensor fibre of first side plate upper edge axis direction is equipped with several first through hole.
4. Hydro-concrete Structures military service condition optical fiber sound emission sensing device according to claim 3, it is characterised in that：
The second sensor fibre of second side plate upper edge axis direction is equipped with several second through-holes.
5. Hydro-concrete Structures military service condition optical fiber sound emission sensing device according to claim 4, it is characterised in that：
The first through hole is that chamber circular hole, common chamber circular hole section are circular hole altogether, and the second through-hole is chamber hexagon ring altogether, altogether chamber hexagon ring section
For hexagon ring, first through hole and the second through-hole are odd number.
6. Hydro-concrete Structures military service condition optical fiber sound emission sensing device according to claim 5, it is characterised in that：
The first arc lid and the second arc cover and are equipped with salient angle.
7. Hydro-concrete Structures military service condition optical fiber sound emission sensing device according to claim 6, it is characterised in that：
The outer surface of the bottom plate, the first side plate and the second side plate is equipped with outer access slot.
8. Hydro-concrete Structures military service condition optical fiber sound emission sensing device according to claim 7, it is characterised in that：
It is separated between first sensor fibre and the second sensor fibre by carrying diaphragm.
A kind of 9. method of Hydro-concrete Structures military service condition optical fiber sound emission sensing device, which is characterized in that including following
Step：
Various components in module are laid in the first step, structure sensor fibre sound emission, are equipped with the sensor fibre of certain length, rotation the
Side plate and the second side plate, the form that composition angle with horizontal plane is 60 °, and then form main chamber hole altogether；
Second step, rotates the first arc lid and the second arc cover strip moves the movement of the first arc voltage body and the second arc voltage body, passes through the first arc
First sensor fibre and the second sensor fibre are pressed into arc and carry track road by the position of laminate and the second arc voltage body intermediate projections respectively
In, four sensor fibre sound emission installation aiding devices are deployed in concrete body to be measured by outer access slot；
Third walks, and all parts are opened, each component is debugged, and four to being laid in concrete body sensings
The first sensor fibre and the second sensor fibre in optical fiber sound emission installation aiding device are calibrated and are demarcated, and pass through laser light source pair
First sensor fibre and the second sensor fibre carry out the modulation of femtosecond pulse；
4th step, when concrete body generates acoustic emission source under extraneous load action, the acoustic emission wave in acoustic emission source
The femtosecond pulse light of the first sensor fibre and the second sensor fibre that will be influenced in four sensor fibre sound emission installation aiding devices
Information, and chamber circular hole, altogether chamber hexagon ring and the Time And Frequency of the main sympathetic response that chamber hole generates altogether are all different together for acoustic emission wave, this
A little information can pass to first by from physically secondary amplification and delay by the acoustic emission information of secondary amplification and delay
Sensor fibre and the second sensor fibre；
5th step is received and is detected to the femtosecond pulse optical information of variation by receiver, optical detector, after by signal
The femtosecond pulse optical information of variation is carried out denoising and data storage, and then converge to concrete knot by processor and memory
In structure body monitoring and evaluation information system；
6th step draws the variation time-histories song of the femtosecond pulse optical information in concrete body monitoring and evaluation information system
Line reflects the variation of acoustic emission wave caused by acoustic emission source, and then realizes and concrete body is dynamically monitored and detected.
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| CN108061759B (en) * | 2017-11-23 | 2019-09-10 | 河海大学 | A kind of Reason of Hydraulic Structural Damage recognition methods based on piezoelectric ceramics |
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