CN107037128A - The method and apparatus that adhesive structure degree of injury is assessed based on zero group velocity mode - Google Patents
The method and apparatus that adhesive structure degree of injury is assessed based on zero group velocity mode Download PDFInfo
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- CN107037128A CN107037128A CN201710282851.3A CN201710282851A CN107037128A CN 107037128 A CN107037128 A CN 107037128A CN 201710282851 A CN201710282851 A CN 201710282851A CN 107037128 A CN107037128 A CN 107037128A
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- adhesive structure
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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
- G01N29/04—Analysing solids
- G01N29/043—Analysing solids in the interior, e.g. by shear waves
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B17/00—Measuring arrangements characterised by the use of infrasonic, sonic or ultrasonic vibrations
- G01B17/02—Measuring arrangements characterised by the use of infrasonic, sonic or ultrasonic vibrations for measuring thickness
-
- 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
- G01N29/34—Generating the ultrasonic, sonic or infrasonic waves, e.g. electronic circuits specially adapted therefor
- G01N29/346—Generating the ultrasonic, sonic or infrasonic waves, e.g. electronic circuits specially adapted therefor with amplitude characteristics, e.g. modulated signal
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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
- G01N29/34—Generating the ultrasonic, sonic or infrasonic waves, e.g. electronic circuits specially adapted therefor
- G01N29/348—Generating the ultrasonic, sonic or infrasonic waves, e.g. electronic circuits specially adapted therefor with frequency characteristics, e.g. single frequency signals, chirp signals
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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
- G01N2291/0231—Composite or layered materials
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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
- G01N2291/02854—Length, thickness
-
- 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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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Acoustics & Sound (AREA)
- Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
Abstract
The present invention relates to the method and apparatus that adhesive structure degree of injury is assessed based on zero group velocity mode, this method comprises the following steps：S1, using the corresponding zero group velocity mode of computer aided calculation adhesive structure to be assessed, obtain the phase velocity and frequency of zero group velocity mode；S2, driving frequency and excitation angle according to needed for being determined the obtained phase velocities of calculation procedure S1 and frequency；S3, excitation transducer and receive transducer be arranged in an operation instrument with preset space length, and make excitation transducer and excitation angle determined by adhesive structure forming step S2 and receive transducer is vertical with adhesive structure；S4, using Signal generator output drive signal come excitation transducer, and receive the signal from receive transducer using signal receiver；S5, will excitation transducer and receive transducer is coupled to adhesive structure and carries out scanning detection；S6, during scanning, the signal that signal receiver is obtained is analyzed and processed, and assess the extent of damage of adhesive structure.
Description
Technical field
The invention belongs to structural material testing field, in particular it relates to which a kind of assessed based on zero group velocity mode bonds knot
The method and apparatus of structure degree of injury.
Background technology
In recent years, bonded structure was due to itself stable connection and portable construction, and it more may be used compared to other connected modes
Lean on and connected piece will not be deformed, be widely used in fields such as aviations.But adhesive structure easily occurs in manufacture and use
Come unglued and produce damage, cause structure static strength to reduce, fatigue life reduction.And similar to coming unglued, stomata, interior laminate layer etc.
Damage, most directly performance is structural thickness change for it.It is very not fast currently for the detection of adhesive structure internal injury
Fast reliable nondestructive method, therefore it is most important to find a kind of method of simple and quick detection adhesive structure thickness
's.
The heterogeneous microstructure and mechanical property of material directly affect the characteristic that sound is propagated in the material.Ultrasonic evaluation
Change with sign materials microstructure and mechanical property is a kind of method being widely used.Current supersonic guide-wave is normal
For the check and evaluation of material, according to ultrasonic linear physical parameter (amplitude, attenuation coefficient, velocity of wave) and nonlinear physical parameter
(second order, high-order harmonic wave etc.) characterizes materials microstructure and mechanical property.But, the mode of the current supersonic guide-wave that we commonly use
No matter (S0, A0, S1 and A1 etc.), change according to the change of its linear dimensions or nonlinear parameter, all to small on material thickness
Change is insensitive, therefore is difficult that even can not detect the damage of adhesive structure, the initial stage particularly damaged.
The content of the invention
The present invention is intended to provide a kind of method that adhesive structure degree of injury is assessed based on zero group velocity mode, with can be fast
Speed, the internal injury degree for simply and effectively assessing adhesive structure.Therefore, the concrete technical scheme that the present invention is used is as follows：
The method that adhesive structure degree of injury is assessed based on zero group velocity mode, it is characterised in that comprise the following steps：
S1, the physical property according to tested adhesive structure and thickness utilize the corresponding zero group velocity mould of computer aided calculation
State, obtains the frequency under the phase velocity and the thickness of the zero group velocity mode；
S2, the phase velocity according to zero obtained group velocity mode of calculation procedure S1 and frequency determine needed for driving frequency with
And excitation angle；
S3, will excitation transducer and receive transducer with preset space length be arranged on an operation instrument on, and make it is described swash
Encourage transducer and excitation angle determined by the adhesive structure forming step S2 and the receive transducer and the bonding knot
Structure is vertical；
S4, using Signal generator export with driving frequency determined by step S2 pumping signal come encourage it is described swash
Transducer is encouraged, and the signal from the receive transducer is received using signal receiver；
S5, by the excitation transducer and receive transducer coupled to the adhesive structure and the mobile operation instrument pair
The adhesive structure carries out scanning detection；
S6, during scanning, the signal that the signal receiver is obtained is analyzed and processed, obtain it is described bonding knot
The thickness change of structure, and then assess the extent of damage of the adhesive structure.
Further, in the step S4, in addition to by pumping signal by wave filter and attenuator to improve noise
Compare the step of.
Further, in the step S4, in addition to by the signal from the receive transducer by amplifier with
The step of improving signal intensity.
Further, in the step S5, the excitation transducer and receive transducer and the coupling of the adhesive structure
Close and use Air Coupling mode.
Further, in the step S5, excitation signal strength is adjusted according to actually detected situation, to ensure detection knot
Fruit is more accurately and reliably.
Further, it is additionally included in testing result export after the step S6 further to be divided in a computer
The step of analysis.
The invention also provides the device that adhesive structure degree of injury is assessed based on zero group velocity, it may include center processing
Device, Signal generator, signal receiver, display device, excitation transducer and receive transducer, the central processing unit and institute
Signal generator, signal receiver, the display device signal stated are connected, and the Signal generator is electrically connected with the excitation transducer
Connect, the signal receiver is electrically connected with the receive transducer, the excitation transducer and receive transducer are with preset space length
In an operation instrument, and the excitation transducer forms required excitation angle, the reception with the adhesive structure
Transducer is vertical with the adhesive structure, and the central processing unit is used to control the excitation frequency needed for the Signal generator output
The pumping signal of rate encourages the excitation transducer, with the excitation supersonic guide-wave of zero group velocity mode of frequency needed for producing,
And the non-zero group velocity mode received to the signal receiver by the receive transducer from the adhesive structure is super
Guided Waves are handled, and result is shown on said display means.
Further, the Signal generator may include signal generating module and frequency adjustment module, the frequency regulation
Module is connected with the signal generating module signal, and the signal frequency that the signal generating module is produced is adjusted to required
Frequency.
Further, the Signal generator may also include signal intensity adjustment module, and the signal intensity adjusts mould
Block is connected with the signal generating module signal, the signal intensity that the signal generating module is produced be adjusted to needed for it is strong
Degree.
Further, described device is gone here and there again after may also include attenuator and wave filter, attenuator and the wave filter concatenation
It is connected between the Signal generator and the excitation transducer.
The present invention uses above-mentioned technical proposal, has an advantageous effect in that：The present invention quickly, can be commented simply and effectively
Estimate the internal injury degree of adhesive structure, the initial stage particularly damaged, and then judge under corresponding degree of injury, the bonding
Whether structure, which can continue to, uses.
Brief description of the drawings
Fig. 1 is propagation dispersion curve figure of the supersonic guide-wave in flat board adhesive structure, wherein, dashed region is S1 mode institute
Zero group velocity (ZGV) modal regions that can be encouraged；
Fig. 2 is the curve map of frequency change and change in depth relation；
Fig. 3 is showing for the device according to embodiments of the present invention that adhesive structure degree of injury is assessed based on zero group velocity mode
It is intended to.
Embodiment
To further illustrate each embodiment, the present invention is provided with accompanying drawing.These accompanying drawings are the invention discloses the one of content
Point, it is mainly to illustrate embodiment, and can coordinate the associated description of specification to explain the operation principles of embodiment.Coordinate ginseng
These contents are examined, those of ordinary skill in the art will be understood that other possible embodiments and advantages of the present invention.
In conjunction with the drawings and specific embodiments, the present invention is further described.
First the principle that the supersonic guide-wave using zero group velocity mode assesses bonded structure degree of injury is briefly described.
The phase velocity of supersonic guide-wave is cp=ω/k=2 π f/k, group velocity cg=d ω/dk=2 π df/dk, the frequency dispersion according to Fig. 1
In curve, domain of the existence on the dispersion curve of S1 mode, its 2 π f/k ≠ 0, but 2 π df/dk=0, i.e. its phase velocity are not zero
But group velocity is zero, the mode now encouraged is not propagated, and its energy concentrates on excitation area.It is determined that driving frequency,
Under angle and material thickness, specific mode can be motivated, such as zero group velocity mode.When material thickness occurs because of damage
During change, minor variations occur for the thick product of frequency and dissipation of energy, can receive supersonic guide-wave in excitation area contiguous zone.Due to
Thickness change is minimum, it is believed that the thick product of frequency is constant, i.e.,
Δ C=Δs fd0+Δd·f0=0, (1)
So as to
Wherein d0Not damage specimen thickness, f0For zero group velocity modal frequency of excitation, Δ f is that to receive frequency relative
The change of driving frequency.The change of zero group velocity supersonic guide-wave frequency and fundamental frequency and original thickness are received according to contiguous zone is determined
Relation (such as Fig. 2), can be with qualitative evaluation material internal thickness change, so that the degree of injury of assessment material.
After being damaged inside bonded structure, it is possible that the defect such as bubbling, layering, causes structural thickness to change and (becomes
It is big or diminish).When these damage fields are passed through in zero group velocity mode scanning, the energy that its script is not propagated is because thickness change
It is changed into propagable state.By receiving zero group velocity Mode variation in excitation area contiguous zone, according to received signal
Frequency changes assessment material thickness change, so that judgement material degree of injury.
The present invention proposes the method that adhesive structure degree of injury is assessed based on zero group velocity mode, and this method includes following
Step：
S1, the physical property according to tested adhesive structure and thickness utilize the corresponding zero group velocity mould of computer aided calculation
State, obtains the frequency under the phase velocity and the thickness of the zero group velocity mode；
S2, the phase velocity according to zero obtained group velocity mode of calculation procedure S1 and frequency determine needed for driving frequency with
And excitation angle；
S3, will excitation transducer and receive transducer with preset space length be arranged on an operation instrument on, and make it is described swash
Encourage transducer and excitation angle determined by the adhesive structure forming step S2 and the receive transducer and the bonding knot
Structure is vertical；
S4, using Signal generator export with driving frequency determined by step S2 pumping signal come encourage it is described swash
Transducer is encouraged, and the signal from the receive transducer is received using signal receiver；Preferably, pumping signal is passed through into filter
Ripple device is with attenuator to improve signal to noise ratio and/or the signal from the receive transducer is strong to improve signal by amplifier
Degree；
S5, by the excitation transducer and receive transducer coupled to the adhesive structure and the mobile operation instrument pair
The adhesive structure carries out scanning detection；Preferably, the excitation transducer and receive transducer and the coupling of the adhesive structure
Close and use Air Coupling mode；In addition, excitation signal strength can be adjusted according to actually detected situation, to ensure testing result more
Accurately and reliably；
S6, during scanning, the signal that the signal receiver is obtained is analyzed and processed, obtain it is described bonding knot
The thickness change of structure, and then assess the extent of damage of the adhesive structure.
In addition, method is additionally included in testing result export after the step S6 further to be divided in a computer
The step of analysis.
As shown in figure 3, may include central processing unit based on the device that zero group velocity mode assesses adhesive structure degree of injury
10th, Signal generator 20, signal receiver 30, display device 40, excitation transducer 50 and receive transducer 60, the center
Processor 10 is connected with described Signal generator 20, signal receiver 30, the signal of display device 40, the Signal generator 20
Electrically connected with the excitation transducer 50, the signal receiver 30 is electrically connected with the receive transducer 60.Central processing unit
10 are used for the voltage signal for controlling the Signal generator 20 to produce required frequency to the excitation transducer 50, to produce
Need the excitation supersonic guide-wave of zero group velocity mode of frequency；And to letter that the signal receiver 30 is received from adhesive structure 70
Number (supersonic guide-wave of non-zero group velocity mode) is handled, and obtains the thickness change of adhesive structure 70, and then assess described viscous
The degree of injury of junction structure 70, and assessment result is shown in the display device 40.Central processing unit 10 is to compile
Journey logic controller or microcontroller etc..
The Signal generator 20 may include signal generating module 21 and frequency adjustment module 22, the frequency adjustment module
22 are connected with the signal of signal generating module 21, needed for the signal frequency that the signal generating module 21 is produced is adjusted to
Frequency.The concrete structure and connection of signal generating module 21 and frequency adjustment module 22 are well known to those skilled in the art
, no longer it is further described herein.The Signal generator 20 may also include signal intensity adjustment module 23, and the signal is strong
Degree adjustment module 23 is connected with the signal of signal generating module 21, the signal intensity that the signal generating module 21 is produced
It is adjusted to required intensity.Equally, the concrete structure of signal generating module 21 and frequency adjustment module 22 and connection are also ability
Known to field technique personnel, no longer it is further described herein.
The excitation transducer 50 and receive transducer 60 are arranged in an operation instrument 80 with preset space length L, by moving
Dynamic operation instrument 80, the excitation transducer 50 and the receive transducer 60 can keep preset space length L synchronous in the bonding
Moved in structure 70.Preset space length L can be adjusted according to actually detected situation.The excitation transducer 50 and the bonding
Excitation angle a needed for structure 70 is formed, and the receive transducer 60 is vertical with the adhesive structure 70.
Preferably, the excitation transducer 50 is Air Coupling ultrasonic probe, and the receive transducer 60 is Air Coupling
Transducer, but they can also use other coupled modes.
In addition, described device may also include after attenuator 90 and wave filter 100, attenuator 80 and wave filter 90 concatenation
It is serially connected with again between the Signal generator 20 and the excitation transducer 50.The signal that Signal generator 20 is produced is through overdamping
After device 90 and wave filter 100, signal to noise ratio is improved, so that the arousal effect of excitation transducer 50 is more preferable.
Although specifically showing and describing the present invention with reference to preferred embodiment, those skilled in the art should be bright
In vain, do not departing from the spirit and scope of the present invention that appended claims are limited, in the form and details can be right
The present invention makes a variety of changes, and is protection scope of the present invention.
Claims (10)
1. the method for adhesive structure degree of injury is assessed based on zero group velocity mode, it is characterised in that comprise the following steps：
S1, the physical property according to tested adhesive structure and thickness utilize the corresponding zero group velocity mode of computer aided calculation,
Obtain the frequency under the phase velocity and the thickness of the zero group velocity mode；
S2, the phase velocity according to zero obtained group velocity mode of calculation procedure S1 and frequency determine needed for driving frequency and swash
Encourage angle；
S3, will excitation transducer and receive transducer with preset space length be arranged on an operation instrument on, and make it is described excitation change
Energy device and excitation angle determined by the adhesive structure forming step S2 and the receive transducer and the adhesive structure are vertical
Directly；
S4, using Signal generator export with driving frequency determined by step S2 pumping signal come encourage it is described excitation change
Energy device, and receive the signal from the receive transducer using signal receiver；
S5, by the excitation transducer and receive transducer coupled to the adhesive structure and the mobile operation instrument to described
Adhesive structure carries out scanning detection；
S6, during scanning, the signal that the signal receiver is obtained is analyzed and processed, the adhesive structure is obtained
Thickness change, and then assess the extent of damage of the adhesive structure.
2. the method as claimed in claim 1 that adhesive structure degree of injury is assessed based on zero group velocity mode, it is characterised in that
In the step S4, in addition to by pumping signal by wave filter and attenuator to improve signal to noise ratio the step of.
3. the method as claimed in claim 1 that adhesive structure degree of injury is assessed based on zero group velocity mode, it is characterised in that
In the step S4, in addition to by the signal from the receive transducer by amplifier to improve the step of signal intensity
Suddenly.
4. the method as claimed in claim 1 that adhesive structure degree of injury is assessed based on zero group velocity mode, it is characterised in that
In the step S5, the excitation transducer and receive transducer and the coupling of the adhesive structure use Air Coupling side
Formula.
5. the method as claimed in claim 1 that adhesive structure degree of injury is assessed based on zero group velocity mode, it is characterised in that
In the step S5, excitation signal strength is adjusted according to actually detected situation, to ensure testing result more accurately and reliably.
6. the method as claimed in claim 1 that adhesive structure degree of injury is assessed based on zero group velocity mode, it is characterised in that
The step of being additionally included in testing result export after the step S6 to be further analyzed in a computer.
7. the device of adhesive structure degree of injury is assessed based on zero group velocity mode, it is characterised in that including central processing unit, letter
Number driver, signal receiver, display device, excitation transducer and receive transducer, the central processing unit with it is described
Signal generator, signal receiver, the connection of display device signal, the Signal generator are electrically connected with the excitation transducer,
The signal receiver is electrically connected with the receive transducer, and the excitation transducer and receive transducer are installed with preset space length
In an operation instrument, and the excitation transducer forms required excitation angle, the reception transducing with the adhesive structure
Device is vertical with the adhesive structure, and the central processing unit is used for the driving frequency for controlling the Signal generator output required
Pumping signal encourages the excitation transducer, with the excitation supersonic guide-wave of zero group velocity mode of frequency needed for producing, and right
The ultrasound for the non-zero group velocity mode that the signal receiver is received by the receive transducer from the adhesive structure is led
Ripple is handled, and result is shown on said display means.
8. the device as claimed in claim 7 that adhesive structure degree of injury is assessed based on zero group velocity mode, it is characterised in that
The Signal generator includes signal generating module and frequency adjustment module, and with the signal mould occurs for the frequency adjustment module
Block signal is connected, and the signal frequency that the signal generating module is produced is adjusted to required frequency.
9. the device as claimed in claim 8 that adhesive structure degree of injury is assessed based on zero group velocity mode, it is characterised in that
The Signal generator also includes signal intensity adjustment module, and the signal intensity adjustment module is believed with the signal generating module
Number connection, the signal intensity that the signal generating module is produced is adjusted to required intensity.
10. the device as claimed in claim 7 that adhesive structure degree of injury is assessed based on zero group velocity mode, its feature is existed
In, in addition to attenuator and wave filter, be serially connected with again after attenuator and the wave filter concatenation Signal generator with it is described
Between excitation transducer.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710282851.3A CN107037128B (en) | 2017-04-26 | 2017-04-26 | Method and device for evaluating damage degree of bonding structure based on zero group velocity mode |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710282851.3A CN107037128B (en) | 2017-04-26 | 2017-04-26 | Method and device for evaluating damage degree of bonding structure based on zero group velocity mode |
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| CN107037128A true CN107037128A (en) | 2017-08-11 |
| CN107037128B CN107037128B (en) | 2020-07-24 |
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Cited By (2)
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| CN108955589A (en) * | 2018-09-25 | 2018-12-07 | 浙江省特种设备检验研究院 | A kind of in-situ measuring method and device of tempered glass insert depth |
| CN110243521A (en) * | 2019-07-02 | 2019-09-17 | 广东工业大学 | A kind of sheet stress measurement method and sheet stress measuring system |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108955589A (en) * | 2018-09-25 | 2018-12-07 | 浙江省特种设备检验研究院 | A kind of in-situ measuring method and device of tempered glass insert depth |
| CN108955589B (en) * | 2018-09-25 | 2020-04-17 | 浙江省特种设备检验研究院 | In-situ measurement method and device for embedding depth of toughened glass |
| CN110243521A (en) * | 2019-07-02 | 2019-09-17 | 广东工业大学 | A kind of sheet stress measurement method and sheet stress measuring system |
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| CN107037128B (en) | 2020-07-24 |
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Effective date of registration: 20221206 Address after: Room 403, 4/F, Building 1, No. 307, Liuhe Road, Puyan Street, Binjiang District, Hangzhou, Zhejiang, 310000 Patentee after: Hangzhou Miochuang Technology Co.,Ltd. Address before: 361000 Siming South Road, Xiamen, Fujian Province, No. 422 Patentee before: XIAMEN University |
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