CN106596725B - A kind of composite structure Zone R defect ultrasound method of discrimination - Google Patents
A kind of composite structure Zone R defect ultrasound method of discrimination Download PDFInfo
- Publication number
- CN106596725B CN106596725B CN201611032342.7A CN201611032342A CN106596725B CN 106596725 B CN106596725 B CN 106596725B CN 201611032342 A CN201611032342 A CN 201611032342A CN 106596725 B CN106596725 B CN 106596725B
- Authority
- CN
- China
- Prior art keywords
- composite structure
- detected
- structure zone
- covering
- zone
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Classifications
-
- 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
- G01N29/07—Analysing solids by measuring propagation velocity or propagation time of acoustic waves
- G01N29/075—Analysing solids by measuring propagation velocity or propagation time of acoustic waves by measuring or comparing phase angle
-
- 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
Abstract
The invention belongs to technical field of nondestructive testing, are related to a kind of composite structure Zone R defect ultrasound method of discrimination.The method of the present invention is based on wideband-short pulse ultrasonic reflections signal and its feature from detected composite structure Zone R different directions and position, utilize its Time Domain Amplitude, phase, inside the variation of the parameters such as propagation time and detected composite structure Zone R covering, Zone R covering-Zone R fill area interface, the signal contact of Zone R fill area and its defect, construct composite structure Zone R defect ultrasound method of discrimination, the depth location of detection defect determines method, coupling or water spray coupling are contacted using mantle, manually or automatically scanning mode, realize composite structure Zone R ultrasound RF and image checking, it is 0.5~20mm that Zone R, which detects thickness range,.Actually detected effect shows to significantly improve the accuracy and reliability of composite structure Zone R defects in ultrasonic testing differentiation and the defect detection ability to Zone R and the property examined.
Description
Technical field
The invention belongs to technical field of nondestructive testing, are related to a kind of composite structure Zone R defect ultrasound method of discrimination.
Background technique
Composite structure is obtaining batch application in fields such as aerospace, traffic, and Zone R is composite material knot
Important connection and geometry transition region in structure, play carrying and intermal force.Therefore, it usually requires that in composite structure
Zone R carries out 100% covering non-destructive testing.Currently, being mainly based upon the amplitude from composite structure Zone R ultrasonic reflection signal
(i.e. dB method) carries out defect estimation, and main deficiency is: since composite structure Zone R internal structure is complicated, thus will cause
Complicated sound wave reflects signal, influences the differentiation of defect and the quantitative analysis of defect, be easy to cause defect missing inspection and erroneous judgement.
Summary of the invention
The purpose of the present invention is propose a kind of compound for deficiency existing for the Zone R defect differentiated in composite structure
Material structure Zone R defect ultrasound method of discrimination.
The technical solution of the invention is as follows,
1. a kind of composite structure Zone R defect ultrasound method of discrimination described in, by ultrasonic transducer, ultrasound unit, sweeps
Unit, signal processing unit and display unit is retouched to constitute,
Fluid couplant, ultrasonic transduction are used between ultrasonic transducer and detected composite structure Zone R skin-surface
Device generates wideband-short pulse incident ultrasound wave signal under the action of ultrasound unit Pass through coupling
Mixture travels to detected composite structure Zone R covering (6A, 6B and 6C) surface,In a part tested
It surveys composite structure Zone R skin-surface formation wideband-short pulse and reflects ultrasonic wave signalAnother part sound
Wave is by after detected composite structure Zone R skin-surface reflection/refraction, in detected composite structure Zone R covering
Inside forms wideband-short pulse transmission ultrasonic wave signalWhenTravel to be detected it is compound
When the covering fill area interface-R in material structure Zone R,It is multiple being detected after secondary reflection/refraction again
Wideband-short pulse transmission ultrasonic wave signal is formed in fill area in condensation material structure Zone RBe detected
The wideband-short pulse that covering-R fill area interface in composite structure Zone R is formed reflects ultrasonic wave signal It is wide that reflection is formed around defect in the covering being detected in composite structure Zone R
Band burst pulse ultrasonic waveAt the interface covering-R fill area (6D) being detected in composite structure Zone R
Reflection wideband-short pulse ultrasonic wave is formed around defectIn detected composite wood
Expect to form reflection wideband-short pulse ultrasonic wave in the fill area in structure Zone R around defect
Here,
AI、tIRespectivelyAmplitude, phase and from issue after the propagation time,
AF、tFRespectivelyAmplitude, phase and travel in detected composite structure Zone R
The time of skin-surface,
AT1、tT1RespectivelyAmplitude, phase and travel to detected composite structure Zone R
Middle covering (the internal time,
AT2、tT2RespectivelyAmplitude, phase and travel in detected composite structure R
Fill area in time,
AB、tBRespectivelyAmplitude, phase and travel in detected composite structure Zone R
The time at covering-R fill area interface,
AD1、tD1RespectivelyAmplitude, phase and travel to detected composite structure Zone R
In covering in defect interface time,
AD2、tD2RespectivelyAmplitude, phase and travel to detected composite structure R
The time at the covering-R fill area boundary defect interface in area,
AD3、tD3RespectivelyAmplitude, phase and travel to detected composite structure R
The time at the fill area internal flaw interface in area,
Wideband-short pulse in detected composite structure Zone R is received by ultrasonic transducer and reflects ultrasonic wave letter
Number, after signal processing unit processes, show that wideband-short pulse reflects ultrasonic wave signal by display unit, and be based on this broadband
Burst pulse reflects ultrasonic wave signal or its corresponding picture signal carries out the defects of detected composite structure Zone R and sentences,
In:
1) when the detection signal that display unit is shown meets following condition:
Differentiate to be detected in composite structure Zone R there is no defect, wherein
Here, AF=R1AI,tF=tI,
ρ1, υ1--- it is respectively the liquid between the skin-surface in ultrasonic transducer and detected composite structure Zone R
The density and the velocity of sound of couplant,
ρ2, υ2--- it is respectively detected the density and the velocity of sound of the covering in composite structure Zone R,
Sgn(R1) --- to take R1Sign function；
Work as R1When > 0, Sgn (R1)=1, R1When < 0, Sgn (R1)=- 1；
Here, AB=T1T1'R2AI, and work as ABWhen=0,It indicates at this time in detected composite wood
Covering-R fill area interface in material structure Zone R does not form wideband-short pulse and reflects ultrasonic wave signal
The thickness h for the covering being detected in composite structure Zone R is determined by following formula:
Here, tB--- it isIlliteracy is traveled to from the skin-surface in detected composite structure Zone R
The round-trip required time at skin-R fill area interface,
Work as ABWhen ≠ 0, thenIt indicates to fill out in the covering-R being detected in composite structure Zone R at this time
It fills regional boundary face and forms wideband-short pulse and reflect ultrasonic wave signalAnd
And when ultrasonic transducer is detected from the covering side in detected composite structure Zone R, h is to be detected composite structure
The thickness h of covering in Zone R1, i.e. h=h1, when ultrasonic transducer is examined from the covering side in detected composite structure Zone R
When survey, h is the thickness h for the covering being detected in composite structure Zone R2, i.e. h=h2, when ultrasonic transducer is compound from being detected
When covering side in material structure Zone R is detected, h is the thickness h for the covering being detected in composite structure Zone R3, i.e. h=
h3,
ρ3, υ3--- it is respectively detected the density and the velocity of sound of the R fill area in composite structure Zone R,
α1--- for acoustic attenuation system of the wideband-short pulse ultrasonic wave in the covering being detected in composite structure Zone R
Number,
Work as T1T1'R2When > 0, Sgn (T1T1'R2)=1, T1T1'R2When < 0, Sgn (T1T1'R2)=- 1；
2) when the detection signal of display unit (5) display meets following condition:
And it will appear's
Secondary wideband-short pulse ultrasonic signal
It is defective in covering in the detected composite structure Zone R of differentiation,
Wherein,
AB=0 or AB→ 0, it is related with the property of defect and size,
Here, AD1=T1T1'RD1AI,
ρD1, υD1--- it is respectively detected the density and the velocity of sound of the defects of covering in composite structure Zone R,
Work as T1T1'RD1When > 0, Sgn (T1T1'RD1)=1, T1T1'RD1When < 0, Sgn (T1T1'RD1)=- 1,
The depth h of defectD1Are as follows:
3) when the detection signal of display unit (5) display meets following condition:
And
OccurSecondary wideband-short pulse ultrasonic signal
Differentiate that the covering-R fill area interface being detected in composite structure Zone R is defective,
Wherein,
Here,
ρD2, υD2--- respectively it is detected the covering-R fill area boundary defect in composite structure Zone R
Density and the velocity of sound,
Work as T1T1'RD2When > 0, Sgn (T1T1'RD2)=1, T1T1'RD2When < 0, Sgn (T1T1'RD2)=- 1,
The depth h of defectD2Equal to the thickness of covering, and: when ultrasonic transducer is detected from covering side, hD2=h1, when
When ultrasonic transducer is detected from covering side, hD2=h2, when ultrasonic transducer is detected from covering side, hD2=h3；
4) when the detection signal that display unit is shown meets following condition:
And it will appearSecondary wideband-short pulse ultrasonic signal
Differentiate existing defects inside the R fill area being detected in composite structure Zone R,
Wherein,
Reflection wideband-short pulse ultrasonic wave is formed around R fill area internal flaw
Here, AD3=T1T1'T2T2'RD3AI,
ρD3, υD3--- it is respectively detected the density and the velocity of sound of the R fill area internal flaw in composite structure Zone R,
Work as T1T1'T2T2'RD3When > 0, Sgn (T1T1'T2T2'RD3)=1, T1T1'T2T2'RD3When < 0, Sgn (T1T1'T2T2'
RD3)=- 1,
hD3--- it is the depth of defect, is determined by following formula,
The wideband-short pulse ultrasound for being detected composite structure Zone R (6) is come from using ultrasonic RF mode recording and displaying
Wave signal,
It is detected by mobile ultrasonic transducer from the covering different directions in detected composite structure Zone R, it is real
Ultrasound covering detection now is carried out to detected composite structure Zone R different parts and different types of Zone R.
Coupling or spray are contacted using mantle between ultrasonic transducer and the skin-surface in detected composite structure Zone R
Water coincidence.
The 1-1.5 weeks pulse period of ultrasonic transducer selected between frequency 2-10MHz, passed through the scanning of manual or multiaxis
Mechanism realizes ultrasonic transducer to the Scanning Detction of detected composite structure Zone R.
The adjustable gain of ultrasound unit, damping is adjustable, and bandwidth is not less than 40MHz.
Display unit is shown using ultrasound RF and image display pattern.
The present invention has the advantage that and beneficial effect,
The method of the present invention is based on the wideband-short pulse ultrasound from detected composite structure Zone R different directions and position
Wave reflection signal and its feature, variation and detected composite material knot using parameters such as its Time Domain Amplitude, phase, propagation times
Inside structure Zone R covering, Zone R covering-Zone R fill area interface, Zone R fill area and its defect signal contact, construct composite wood
Material structure Zone R defect ultrasound method of discrimination, the depth location for detecting defect determine method, contact coupling or water spray coupling using mantle
It closes, manually or automatically scanning mode, realization composite structure Zone R ultrasound RF and image checking, Zone R detection thickness range are
0.5~20mm.Actually detected effect shows to significantly improve the accuracy of composite structure Zone R defects in ultrasonic testing differentiation
With reliability and the defect detection ability to Zone R and the property examined.
The present invention using wideband pulse ultrasonic wave composite structure Zone R reflex behavior, it is anti-by establishing ultrasonic wave
Signal time domain more characteristic parameters are penetrated, composite structure Zone R defect estimation function is constructed, realize composite structure Zone R defect
Differentiation and defect location significantly improve inspection of the ultrasound to the issuable defect of different parts in Zone R in composite structure
Output capacity.
The present invention is based on wideband pulse ultrasonic wave composite structure Zone R reflex behavior, utilize established it is compound
The defect estimation function and Zone R defect estimation method of material structure Zone R ultrasonic reflections signal time domain more characteristic parameters, are answered
The differentiation and positioning of condensation material structure R defect, significantly improve single dependence ultrasonic reflection signal amplitude (i.e. dB method) carry out it is scarce
Fall into the deficiency differentiated, hence it is evident that improve the reliability of composite structure Zone R different parts ultrasound detection and the standard of defect estimation
True property.
Utilize the reflex behavior proposed in the present invention based on wideband pulse ultrasonic wave in composite structure Zone R different parts
With constructed composite structure Zone R defect estimation method and detection method, carry out composite structure R ultrasound detection and
The differentiation and positioning of Zone R defect, hence it is evident that improve the composite structure Zone R ultrasound property examined, composite material knot can be significantly reduced
The defects of structure Zone R ultrasound detection False Rate and omission factor.
Detailed description of the invention
Fig. 1 is composite structure Zone R defect ultrasound method of discrimination schematic illustration of the invention；
Fig. 2 is the composite structure Zone R defect estimation method legend in the present invention of the invention.
Specific embodiment
1. a kind of composite structure Zone R defect ultrasound method of discrimination, single by ultrasonic transducer 1, ultrasound unit 2, scanning
Member 3, signal processing unit 4 and display unit 5 are constituted, as shown in Figure 1,
Fluid coupling is used between 6 surface covering 6A, 6B and 6C of ultrasonic transducer 1 and detected composite structure Zone R
Agent, ultrasonic transducer 1 generate wideband-short pulse incident ultrasound wave signal under the action of ultrasound unit 2Such as figure
Shown in 1,Detected 6 surface covering 6A, 6B and 6C of composite structure Zone R is traveled to by couplant,In a part detected 6 surface covering 6A, 6B and 6C of composite structure Zone R formed wideband-short pulse it is anti-
Penetrate ultrasonic signalAnother part sound wave pass through in detected composite structure Zone R 6 covering 6A, 6B and
After 6C surface reflection/refraction, wideband-short pulse transmission is formed inside detected composite structure Zone R 6 covering 6A, 6B and 6C
Ultrasonic signalWhenTravel to the covering in detected composite structure Zone R 6
When the fill area interface 6D 6A, 6B and 6C-R,After secondary reflection/refraction again, in detected composite material knot
Wideband-short pulse transmission ultrasonic wave signal is formed in fill area 6D in structure Zone R 6Be detected it is compound
The wideband-short pulse that covering 6A, 6B and 6C-R fill area interface in material structure Zone R 6 is formed reflects ultrasonic wave signalReflection is formed around defect in the covering being detected in composite structure Zone R 6
Wideband-short pulse ultrasonic waveIt is filled out in covering 6A, 6B and the 6C-R being detected in composite structure Zone R 6
It fills around area's 6D boundary defect and forms reflection wideband-short pulse ultrasonic waveIn quilt
It detects and forms reflection wideband-short pulse ultrasonic wave in the fill area 6D in composite structure Zone R 6 around defectAs shown in Figure 1,
Here,
AI、tIRespectivelyAmplitude, phase and from issue after the propagation time,
AF、tFRespectivelyAmplitude, phase and travel in detected composite structure Zone R 6
The surface covering 6A, 6B and 6C time,
AT1、tT1RespectivelyAmplitude, phase and travel to detected composite structure Zone R 6
Time inside middle covering 6A, 6B and 6C,
AT2、tT2RespectivelyAmplitude, phase and travel to detected composite structure R6
In fill area 6D in time,
AB、tBRespectivelyAmplitude, phase and travel in detected composite structure Zone R 6
The interface covering 6A, 6B and 6C-R fill area 6D time,
AD1、tD1RespectivelyAmplitude, phase and travel to detected composite structure R
The time of defect interface in covering 6A, 6B and 6C in area 6,
AD2、tD2RespectivelyAmplitude, phase and travel to detected composite structure R
The time at covering 6A, 6B and 6C-R fill area 6D boundary defect interface in area 6,
AD3、tD3RespectivelyAmplitude, phase and travel to detected composite structure R
The time at the fill area 6D internal flaw interface in area 6,
Wideband-short pulse in detected composite structure Zone R 6 is received by ultrasonic transducer 1 and reflects ultrasonic wave letter
Number, after the processing of signal processing unit 4, show that wideband-short pulse reflects ultrasonic wave signal by display unit 5, and wide based on this
Band burst pulse reflects ultrasonic wave signal or its corresponding picture signal carries out the defects of detected composite structure Zone R 6 and sentences,
Wherein:
1 as shown in Figure 2 a, when the detection signal that display unit 5 is shown meets following condition:
Differentiate to be detected in composite structure Zone R 6 there is no defect, wherein
Here, AF=R1AI,tF=tI,
ρ1, υ1--- it is respectively covering 6A, 6B and 6C table in ultrasonic transducer 1 and detected composite structure Zone R 6
The density and the velocity of sound of fluid couplant between face,
ρ2, υ2--- it is respectively detected the density and the velocity of sound of covering 6A, 6B and 6C in composite structure Zone R 6,
Sgn(R1) --- to take R1Sign function；
Work as R1When > 0, Sgn (R1)=1, R1When < 0, Sgn (R1)=- 1；
Here, AB=T1T1'R2AI, and work as ABWhen=0,It indicates at this time in detected composite wood
The interface covering 6A, 6B and 6C-R fill area 6D in material structure Zone R 6 does not form wideband-short pulse and reflects ultrasonic wave signal
The thickness h of covering 6A, 6B and 6C for being detected in composite structure Zone R 6 are determined by following formula:
Here, tB--- it isFrom the surface covering 6A, 6B and 6C in detected composite structure Zone R 6
The round-trip required time at the interface covering 6A, 6B and 6C-R fill area 6D is traveled to,
Work as ABWhen ≠ 0, thenIt indicates at this time in the covering being detected in composite structure Zone R 6
The interface 6A, 6B and 6C-R fill area 6D forms wideband-short pulse and reflects ultrasonic wave signalAndAnd work as ultrasonic transducer 1 from the covering 6B in detected composite structure Zone R 6
When side is detected, h is the thickness h for the covering 6B being detected in composite structure Zone R 61, i.e. h=h1, when ultrasonic transducer 1 from
When the side the covering 6A detection being detected in composite structure Zone R 6, h is the covering being detected in composite structure Zone R 6
The thickness h of 6A2, i.e. h=h2, when ultrasonic transducer 1 is detected from the side covering 6C in detected composite structure Zone R 6, h
Thickness h for the covering 6C being detected in composite structure Zone R 63, i.e. h=h3,
ρ3, υ3--- it is respectively detected the density and the velocity of sound of the R fill area 6D in composite structure Zone R 6,
α1--- it is wideband-short pulse ultrasonic wave in covering 6A, 6B and the 6C being detected in composite structure Zone R 6
Acoustic attenuation coefficient,
Work as T1T1'R2When > 0, Sgn (T1T1'R2)=1, T1T1'R2When < 0, Sgn (T1T1'R2)=- 1；
2 as shown in Figure 2 b, when the detection signal that display unit 5 is shown meets following condition:
And it will appear's
Secondary wideband-short pulse ultrasonic signal
It is defective in covering 6A, 6B, 6C in the detected composite structure Zone R 6 of differentiation,
Wherein,
AB=0 or AB→ 0, it is related with the property of defect and size,
Here, AD1=T1T1'RD1AI,
ρD1, υD1--- respectively it is detected the density of the defects of covering 6A, 6B, 6C in composite structure Zone R 6
And the velocity of sound,
Work as T1T1'RD1When > 0, Sgn (T1T1'RD1)=1, T1T1'RD1When < 0, Sgn (T1T1'RD1)=- 1,
The depth h of defectD1Are as follows:
3 as shown in Figure 2 c, when the detection signal that display unit 5 is shown meets following condition:
And
OccurSecondary wideband-short pulse ultrasonic signal
Differentiate that the interface covering 6A, 6B, 6C-R fill area 6D being detected in composite structure Zone R 6 is defective,
Wherein,
Here,
ρD2, υD2--- respectively it is detected covering 6A, 6B, 6C-R filling in composite structure Zone R 6
The density and the velocity of sound of area's 6D boundary defect,
Work as T1T1'RD2When > 0, Sgn (T1T1'RD2)=1, T1T1'RD2When < 0, Sgn (T1T1'RD2)=- 1,
The depth h of defectD2Equal to the thickness of covering 6A, 6B, 6C, and: when ultrasonic transducer 1 is detected from the side covering 6B
When, hD2=h1, when ultrasonic transducer 1 is detected from the side covering 6A, hD2=h2, when ultrasonic transducer 1 is examined from the side covering 6D
When survey, hD2=h3；
4 as shown in Figure 2 d, when the detection signal that display unit 5 is shown meets following condition:
And it will appearSecondary wideband-short pulse ultrasonic signal
Differentiate existing defects inside the R fill area 6D being detected in composite structure Zone R 6,
Wherein,
Reflection wideband-short pulse ultrasonic wave is formed around R fill area 6D internal flaw
Here,
ρD3, υD3--- respectively it is detected the density harmony of the R fill area 6D internal flaw in composite structure Zone R 6
Speed,
Work as T1T1'T2T2'RD3When > 0, Sgn (T1T1'T2T2'RD3)=1, T1T1'T2T2'RD3When < 0, Sgn (T1T1'T2T2'
RD3)=- 1,
hD3--- it is the depth of defect, is determined by following formula,
2. as shown in Fig. 2, using broadband of the ultrasound RF mode recording and displaying from detected composite structure Zone R 6
Burst pulse ultrasonic signal,
3. passing through mobile ultrasonic transducer 1 from covering 6A, 6B, 6C different directions in detected composite structure Zone R 6
It is detected, realizes and ultrasound covering detection is carried out to detected 6 different parts of composite structure Zone R and different types of Zone R,
As shown in Figure 1.
4. using mantle between the surface covering 6A, 6B, 6C in ultrasonic transducer 1 and detected composite structure Zone R 6
Contact coupling or water spray coupling, the posture by changing or reconciling ultrasonic transducer 1 are realized circumferential to composite structure Zone R 6
Scanning Detction is realized by moving axially ultrasonic transducer 1 along detected composite structure Zone R 6 to composite structure R
The detection of 6 axial scan of area.
5. the 1-1.5 weeks pulse period of ultrasonic transducer 1, selects between frequency 2-10MHz, swept by manual or multiaxis
Retouching mechanism is scanned ultrasonic transducer 1 from the side covering 6A, 6B, 6C in detected composite structure Zone R 6 respectively,
It is shown in Figure 1 to realize the covering Scanning Detction to detected composite structure Zone R 6.
6. the adjustable gain of ultrasound unit 2, damping is adjustable, bandwidth is not less than 40MHz, has obtained optimal ultrasound detection letter
Number and detection effect.
7. display unit 5 is shown using ultrasound RF and image display pattern, display, record and the detection of testing result are realized
The quantization assessment of defect.
Embodiment
Using the present invention, select the MUT-1 of AirChina Composite Materials Co., Ltd.'s production and FCC-D-1, FCC-B-1 super
Sound detection instrument, CUS-21J ultrasonic testing system and FJ-1 high-resolution ultrasound energy converter are coupled using moisture film to different-thickness
Carbon fiber composite structure Zone R has carried out the actually detected application of series, wherein the length of composite structure Zone R exists
100mm -2000 is differed, and Zone R thickness distribution is in 0.5-20mm etc., using RF display mode and image mode, by sweeping manually
Retouch with automatically scanning detection mode, carried out series detection application, it is actually detected the result shows that: 1 when ultrasound detection be detected
When there is no defect inside composite structure R, in the detection signal that display unit 5 is shown onlyWithAndIt is 0；2 when ultrasound inspection
When having lamination defect inside the covering being detected in composite structure R out, have in the detection signal that display unit 5 is shownAndIt disappears, occursSecondary reflection signal3 when the covering-R fill area interface that ultrasound detection is detected in composite structure R is defective, display
Have in the detection signal that unit 5 is shownAnd occurTwo
Secondary reflection signalAndIt disappears；4 are detected in composite structure R when ultrasound detects
When R fill area is defective, have in the detection signal that display unit 5 is shownAnd occurSecondary reflection signalAndIt disappears.It can be very clearly right using the present invention
Composite structure Zone R detection defect is accurately differentiated, the lamination defect of Ф 3mm in composite structure Zone R can be detected,
Depth of defect positioning accuracy is within the scope of 1 composite plys, and Surface testing blind area is up to 0.13mm, that is, single compound
Material overlay thickness achieves good actually detected effect and application effect.
Claims (7)
1. a kind of composite structure Zone R defect ultrasound method of discrimination, realizes the detection system of this method by ultrasonic transducer
(1), ultrasound unit (2), scanning element (3), signal processing unit (4) and display unit (5) are constituted, characterized in that
Fluid coupling is used between ultrasonic transducer (1) and the surface detected composite structure Zone R (6) covering (6A, 6B, 6C)
Agent, ultrasonic transducer (1) generate wideband-short pulse incident ultrasound wave signal under the action of ultrasound unit (2)Detected composite structure Zone R (6) covering (6A, 6B, 6C) is traveled to by couplant
Surface,In a part form width on detected composite structure Zone R (6) covering (6A, 6B, 6C) surface
Band burst pulse reflects ultrasonic wave signalAnother part sound wave passes through in detected composite structure Zone R (6)
After covering (6A, 6B, 6C) surface reflection/refraction, in the internal shape of detected composite structure Zone R (6) covering (6A, 6B, 6C)
At wideband-short pulse transmission ultrasonic wave signalWhenTravel to detected composite material knot
When interface covering (6A, 6B, 6C)-R fill area (6D) in structure Zone R (6),By secondary reflection/refraction again
Afterwards, respectively in the fill area (6D) being detected in composite structure Zone R (6) and in detected composite structure Zone R (6)
Covering (6A, 6B, 6C)-R fill area interface, formed wideband-short pulse transmission ultrasonic wave signalThe broadband and
Burst pulse reflects ultrasonic wave signal In detected composite structure Zone R (6)
Reflection wideband-short pulse ultrasonic wave is formed in covering around defectIn detected composite structure Zone R
(6) reflection wideband-short pulse ultrasonic wave is formed around covering (6A, 6B, 6C)-R fill area (6D) boundary defect inIn fill area (6D) the interior defect being detected in composite structure Zone R (6)
Surrounding forms reflection wideband-short pulse ultrasonic wave
Here,
AI、tIRespectivelyAmplitude, phase and from issue after the propagation time,
AF、tFRespectivelyAmplitude, phase and travel in detected composite structure Zone R (6)
The time on the surface covering (6A, 6B and 6C),
AT1、tT1RespectivelyAmplitude, phase and travel in detected composite structure Zone R (6)
Covering (6A, 6B, 6C) the internal time,
AT2、tT2RespectivelyAmplitude, phase and travel in detected composite structure R (6)
Fill area (6D) in time,
AB、tBRespectivelyAmplitude, phase and travel in detected composite structure Zone R (6)
The time at the interface covering (6A, 6B, 6C)-R fill area (6D),
AD1、tD1RespectivelyAmplitude, phase and travel to detected composite structure Zone R (6)
In covering (6A, 6B, 6C) interior defect interface time,
AD2、tD2RespectivelyAmplitude, phase and travel to detected composite structure Zone R (6)
In covering (6A, 6B, 6C)-R fill area (6D) boundary defect interface time,
AD3、tD3RespectivelyAmplitude, phase and travel to detected composite structure Zone R (6)
In fill area (6D) internal flaw interface time,
It is received by ultrasonic transducer (1) and reflects ultrasonic wave letter from the wideband-short pulse being detected in composite structure Zone R (6)
Number, after signal processing unit (4) processing, show that wideband-short pulse reflects ultrasonic wave signal by display unit (5), and be based on
This wideband-short pulse reflects ultrasonic wave signal or its corresponding picture signal be detected in composite structure Zone R (6)
Defect estimation, in which:
1) when the detection signal of display unit (5) display meets following condition:
Differentiate to be detected in composite structure Zone R (6) there is no defect, wherein
Here, AF=R1AI,tF=tI,
ρ1, υ1--- it is respectively the covering (6A, 6B and 6C) in ultrasonic transducer (1) and detected composite structure Zone R (6)
The density and the velocity of sound of fluid couplant between surface,
ρ2, υ2--- it is respectively detected the density and the velocity of sound of the covering (6A, 6B, 6C) in composite structure Zone R (6),
Sgn(R1) --- to take R1Sign function；
Work as R1When > 0, Sgn (R1)=1, R1When < 0, Sgn (R1)=- 1；
Here,And work as ABWhen=0,It indicates at this time in detected composite material
Interface covering (6A, 6B and 6C)-R fill area (6D) in structure Zone R (6) does not form wideband-short pulse and reflects ultrasonic wave signal
The thickness h for the covering (6A, 6B, 6C) being detected in composite structure Zone R (6) is determined by following formula:
Here, tB--- it isFrom surface covering (6A, 6B and 6C) in detected composite structure Zone R (6)
The round-trip required time at the interface covering (6A, 6B, 6C)-R fill area (6D) is traveled to,
Work as ABWhen ≠ 0, thenIt indicates at this time in the covering being detected in composite structure Zone R (6)
The interface (6A, 6B and 6C)-R fill area (6D) forms wideband-short pulse and reflects ultrasonic wave signalAndAnd work as ultrasonic transducer (1) from the illiteracy in detected composite structure Zone R (6)
When the side (6B) of skin I is detected, h is the thickness h for the covering I (6B) being detected in composite structure Zone R (6)1, i.e. h=h1, when
When ultrasonic transducer (1) is detected from the side (6A) of covering II in detected composite structure Zone R (6), h is compound to be detected
The thickness h of covering II (6A) in material structure Zone R (6)2, i.e. h=h2, when ultrasonic transducer (1) is from detected composite material knot
When the side (6C) of covering III in structure Zone R (6) is detected, h is the covering III (6C) being detected in composite structure Zone R (6)
Thickness h3, i.e. h=h3,
ρ3, υ3--- it is respectively detected the density and the velocity of sound of the R fill area (6D) in composite structure Zone R (6),
α1--- for sound of the wideband-short pulse ultrasonic wave in the covering (6A, 6B, 6C) being detected in composite structure Zone R (6)
Attenuation coefficient,
Work as T1T1'R2When > 0, Sgn (T1T1'R2)=1, T1T1'R2When < 0, Sgn (T1T1'R2)=- 1；
2) when the detection signal of display unit (5) display meets following condition:
And it will appearSecondary width
Band burst pulse ultrasonic signal
It is defective in covering (6A, 6B, 6C) in differentiation detected composite structure Zone R (6),
Wherein,
AB=0 or AB→ 0, it is related with the property of defect and size,
Here,
ρD1, υD1--- be respectively detected the defects of covering (6A, 6B, 6C) in composite structure Zone R (6) density and
The velocity of sound,
Work as T1T1'RD1When > 0, Sgn (T1T1'RD1)=1, T1T1'RD1When < 0, Sgn (T1T1'RD1)=- 1,
The depth h of defectD1Are as follows:
3) when the detection signal of display unit (5) display meets following condition:
And
OccurSecondary wideband-short pulse ultrasonic signalWith
Differentiate that the interface covering (6A, 6B, 6C)-R fill area (6D) being detected in composite structure Zone R (6) is defective,
Wherein,
Here,
ρD2, υD2--- respectively it is detected interface covering (6A, 6B, 6C)-R fill area (6D) in composite structure Zone R (6)
The density and the velocity of sound of defect,
Work as T1T1'RD2When > 0, Sgn (T1T1'RD2)=1, T1T1'RD2When < 0, Sgn (T1T1'RD2)=- 1,
The depth h of defectD2Equal to the thickness of covering (6A, 6B, 6C), and: when ultrasonic transducer (1) is examined from the side (6B) of covering I
When survey, hD2=h1, when ultrasonic transducer (1) is detected from the side (6A) of covering II, hD2=h2, when ultrasonic transducer (1) is from illiteracy
When the side (6C) of skin III is detected, hD2=h3；
4) when the detection signal of display unit (5) display meets following condition:
And it will appear
Secondary wideband-short pulse ultrasonic signal
Differentiate the internal existing defects of the R fill area (6D) being detected in composite structure Zone R (6),
Wherein,
Reflection wideband-short pulse ultrasonic wave is formed around R fill area (6D) internal flaw
Here,
ρD3, υD3--- respectively it is detected the density harmony of R fill area (6D) internal flaw in composite structure Zone R (6)
Speed,
Work as T1T1'T2T2'RD3When > 0, Sgn (T1T1'T2T2'RD3)=1, T1T1'T2T2'RD3When < 0, Sgn (T1T1'T2T2'RD3)=- 1,
hD3--- it is the depth of defect, is determined by following formula,
2. a kind of composite structure Zone R defect ultrasound method of discrimination according to claim 1, characterized in that using super
Sound RF mode recording and displaying comes from the wideband-short pulse ultrasonic signal for being detected composite structure Zone R (6),
3. a kind of composite structure Zone R defect ultrasound method of discrimination according to claim 1, characterized in that pass through shifting
Dynamic ultrasonic transducer (1) is detected from covering (6A, 6B, 6C) different directions in detected composite structure Zone R (6),
It realizes and ultrasound covering detection is carried out to detected composite structure Zone R (6) different parts and different types of Zone R.
4. a kind of composite structure Zone R defect ultrasound method of discrimination according to claim 1, characterized in that ultrasound
Coupling is contacted using mantle between energy converter (1) and surface covering (6A, 6B, 6C) in detected composite structure Zone R (6)
Or water spray coupling.
5. a kind of composite structure Zone R defect ultrasound method of discrimination according to claim 1, characterized in that ultrasound
The pulse period number of energy converter (1) is 1-1.5 weeks, and frequency selects between 2-10MHz, passes through manual or multiaxis sweep mechanism
Realize ultrasonic transducer (1) to the Scanning Detction of detected composite structure Zone R (6).
6. a kind of composite structure Zone R defect ultrasound method of discrimination according to claim 1, characterized in that ultrasound is single
The adjustable gain of first (2), damping is adjustable, and bandwidth is not less than 40MHz.
7. a kind of composite structure Zone R defect ultrasound method of discrimination according to claim 1, characterized in that display is single
First (5) are shown using ultrasound RF and image display pattern.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611032342.7A CN106596725B (en) | 2016-11-18 | 2016-11-18 | A kind of composite structure Zone R defect ultrasound method of discrimination |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611032342.7A CN106596725B (en) | 2016-11-18 | 2016-11-18 | A kind of composite structure Zone R defect ultrasound method of discrimination |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106596725A CN106596725A (en) | 2017-04-26 |
| CN106596725B true CN106596725B (en) | 2019-08-02 |
Family
ID=58592600
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611032342.7A Active CN106596725B (en) | 2016-11-18 | 2016-11-18 | A kind of composite structure Zone R defect ultrasound method of discrimination |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106596725B (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107550518B (en) * | 2017-09-04 | 2020-12-29 | 中国航空工业集团公司基础技术研究院 | In-vitro tooth tissue characterization method based on acoustic-elastic response |
| CN108226291B (en) * | 2017-12-07 | 2020-08-11 | 中航复合材料有限责任公司 | Method for evaluating ultrasonic detection probability of composite laminated structure defects |
| CN108872380B (en) * | 2018-06-04 | 2021-10-22 | 航天特种材料及工艺技术研究所 | Method for detecting bonding defect of multilayer bonding member |
| CN109282763A (en) * | 2018-10-12 | 2019-01-29 | 国营芜湖机械厂 | A kind of technique for aircraft composite enclosed construction repairing drilling localization method |
| CN113899816B (en) * | 2021-09-10 | 2022-06-17 | 国营芜湖机械厂 | Ultrasonic nondestructive testing device and method for T-shaped composite structure and R-region testing method and device |
| CN114062499B (en) * | 2021-11-18 | 2024-04-09 | 中国航空制造技术研究院 | Ultrasonic detection device for composite material I-beam |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010025676A (en) * | 2008-07-17 | 2010-02-04 | Toshiba Corp | Ultrasonic flaw detecting method and device |
| JP2010230315A (en) * | 2009-03-25 | 2010-10-14 | Honda Motor Co Ltd | Internal inspection method of laser clad valve seat |
| CN102706968A (en) * | 2012-06-12 | 2012-10-03 | 中国航空工业集团公司北京航空制造工程研究所 | Probe and ultrasonic scanning method for detecting inner cavity of whole structure of composite material |
| CN102721740A (en) * | 2012-05-18 | 2012-10-10 | 中国航空工业集团公司北京航空材料研究院 | Device for detecting R angle defect in composite material cavity |
| CN102768240A (en) * | 2012-07-06 | 2012-11-07 | 中国航空工业集团公司北京航空制造工程研究所 | Ultrasonic scanning device and method for detecting R region of inner cavity of composite material structure |
| CN104977356A (en) * | 2015-07-31 | 2015-10-14 | 中航复合材料有限责任公司 | Composite material foam structure ultrasonic detection method based on reflection theory |
-
2016
- 2016-11-18 CN CN201611032342.7A patent/CN106596725B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010025676A (en) * | 2008-07-17 | 2010-02-04 | Toshiba Corp | Ultrasonic flaw detecting method and device |
| JP2010230315A (en) * | 2009-03-25 | 2010-10-14 | Honda Motor Co Ltd | Internal inspection method of laser clad valve seat |
| CN102721740A (en) * | 2012-05-18 | 2012-10-10 | 中国航空工业集团公司北京航空材料研究院 | Device for detecting R angle defect in composite material cavity |
| CN102706968A (en) * | 2012-06-12 | 2012-10-03 | 中国航空工业集团公司北京航空制造工程研究所 | Probe and ultrasonic scanning method for detecting inner cavity of whole structure of composite material |
| CN102768240A (en) * | 2012-07-06 | 2012-11-07 | 中国航空工业集团公司北京航空制造工程研究所 | Ultrasonic scanning device and method for detecting R region of inner cavity of composite material structure |
| CN104977356A (en) * | 2015-07-31 | 2015-10-14 | 中航复合材料有限责任公司 | Composite material foam structure ultrasonic detection method based on reflection theory |
Non-Patent Citations (1)
| Title |
|---|
| 复合材料构件R区的超声相控阵检测实验;张冬梅等;《北京航空航天大学学报》;20130531;第39卷(第5期);688-692 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106596725A (en) | 2017-04-26 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106596725B (en) | A kind of composite structure Zone R defect ultrasound method of discrimination | |
| CN104535657B (en) | A kind of sheet workpiece phased array supersonic guided wave image-forming detecting system and its detection method | |
| RU2438123C2 (en) | Method of detecting and classifying defects in structural components using ultrasound | |
| JP4938050B2 (en) | Ultrasonic diagnostic evaluation system | |
| JP4166222B2 (en) | Ultrasonic flaw detection method and apparatus | |
| US20090114021A1 (en) | Ultrasonic inspection method and device for plastics walls | |
| CN104977356A (en) | Composite material foam structure ultrasonic detection method based on reflection theory | |
| JP4591850B2 (en) | Ultrasonic inspection method and apparatus | |
| JP4196643B2 (en) | Method and apparatus for imaging internal defect by ultrasonic wave | |
| JP3759110B2 (en) | Ultrasonic flaw detection method and apparatus | |
| KR101942792B1 (en) | Steel material quality evaluation method and quality evaluation device | |
| CN112432998A (en) | Ultrasonic nondestructive testing method for rubber plate bonding defects with acoustic cavity structure | |
| JP2009058238A (en) | Method and device for defect inspection | |
| CN106770670B (en) | Composite material defect discrimination method based on pulse ultrasonic holography | |
| JPH04323553A (en) | Method and device for ultrasonic resonance flaw detection | |
| Birring | Sizing Discontinuities by Ultrasonics | |
| JP5910641B2 (en) | Ultrasonic imaging method and ultrasonic imaging apparatus | |
| JP2008261889A (en) | Imaging method of internal defect by ultrasonic wave, and its device | |
| Gori et al. | EMAT transducers and thickness characterization on aged boiler tubes | |
| KR101767422B1 (en) | Seperable Ultrasonic Transducer with Enhanced Space Resolution | |
| JP4419598B2 (en) | Ultrasonic flaw detection | |
| Hesse et al. | A single probe spatial averaging technique for guided waves and its application to surface wave rail inspection | |
| Žukauskas et al. | Application of air–coupled ultrasonic technique for sizing of delamination type defect in multilayered materials | |
| Drinkwater et al. | An ultrasonic wheel probe alternative to liquid coupling | |
| US6393917B1 (en) | System and method for ultrasonic image reconstruction using mode-converted Rayleigh wave |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20221122 Address after: 100024 Beijing city Chaoyang District eight Bridge North East Junzhuang No. 1 Patentee after: AVIC BEIJING AERONAUTICAL MANUFACTURING TECHNOLOGY Research Institute Patentee after: AVIC COMPOSITE Corp.,Ltd. Address before: 101,300 AVIC Industry and Trade Building 507, Shuanghe Street, Shunyi District, Beijing Patentee before: AVIC COMPOSITE Corp.,Ltd. |
|
| CP03 | Change of name, title or address | ||
| CP03 | Change of name, title or address |
Address after: 101300 Zhonghang Fucai No.1 scientific research building, aviation industrial park, Shunyi District, Beijing Patentee after: AVIC COMPOSITE Corp.,Ltd. Patentee after: AVIC BEIJING AERONAUTICAL MANUFACTURING TECHNOLOGY Research Institute Address before: 100024 Beijing city Chaoyang District eight Bridge North East Junzhuang No. 1 Patentee before: AVIC BEIJING AERONAUTICAL MANUFACTURING TECHNOLOGY Research Institute Patentee before: AVIC COMPOSITE Corp.,Ltd. |