CN110196286A - A kind of reference block - Google Patents
A kind of reference block Download PDFInfo
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- CN110196286A CN110196286A CN201810160031.1A CN201810160031A CN110196286A CN 110196286 A CN110196286 A CN 110196286A CN 201810160031 A CN201810160031 A CN 201810160031A CN 110196286 A CN110196286 A CN 110196286A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
- G01N29/22—Details, e.g. general constructional or apparatus details
- G01N29/30—Arrangements for calibrating or comparing, e.g. with standard objects
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Abstract
The present invention relates to quality testing fields, and in particular to a kind of reference block.This reference block includes non-patch area, laying area and glue film, and laying area includes at least one laying being embedded in non-patch area, and glue film is set between laying Qu Yuwei patch area；Artificial defect is equipped in reference block.The reference block provided through the invention, before the detection for carrying out area to be detected each time, the adjustment of sensitivity is carried out by reference block, and be compared on the basis of the echo of the artificial defect in reference block so as to eliminate the adverse effect of human factor, obtain accurate testing result.
Description
Technical field
The present invention relates to detection field, especially a kind of reference block.
Background technique
The damage that in-service aircraft is subject to is usually on the outside of body, and when repairing will not generally also remove damaged component, and
It is to place under repair at the scene to damage field.The repair method generallyd use is staged digging service technique, it may be assumed that excavates damage
Region, and make surface layer excavates that area is big, the area of excavating of deep layer is gradually reduced, and glue then is arranged in the inner surface for excavating region
Film, then the filled composite materials in excavating region, make composite material curing molding.
Repairing for in-service aircraft is generallyd use due to being affected by the limitation of condition and repairing the influence of zone position
The solidification of heating blanket progress composite material.Such cured repairing area of mode is easy that there are poor surface smoothness, inner textures not
The features such as uniformly and there are dispersivity stomatas, it is therefore desirable to which damage reparation quality is detected.Area to be tested includes not repairing
Mending area, laying area and glue film, the laying area includes at least one the material prepreg laying being embedded in non-patch area,
Glue film is set between laying Qu Yuwei patch area.
It is detected in the prior art using the pulse reflection method A sweep of manual contact formula, to detect the defect of area to be tested.But
It when by this method to repairing area and detecting, is affected by human factors larger, is easy to cause testing result inaccurate.
Summary of the invention
Goal of the invention of the invention is: in view of the problems of the existing technology, a kind of reference block is provided, for reducing
Influence of the human factor to damage reparation quality evaluation accuracy.
To achieve the goals above, the technical solution adopted by the present invention are as follows:
A kind of reference block, for simulating the area to be tested after damage reparation, including non-patch area, laying area and glue
Film, laying area include at least one laying being embedded in non-patch area, and glue film is set between laying Qu Yuwei patch area；
Artificial defect is equipped in reference block.
The reference block provided through the invention passes through reference block before the detection for carrying out area to be detected each time
The adjustment of sensitivity is carried out, and is compared on the basis of the echo of the artificial defect in reference block so as to eliminate artificially
The adverse effect of factor obtains accurate testing result.
Specifically, first carrying out first time detection before treating detection zone and being detected, i.e., manually being lacked in reference block
Sunken detection according to waveform adjustment detection sensitivity, and records the time of flaw echo appearance.Then it carries out detecting for second,
Area is gone to detect to be detected under the sensitivity.Comparison detection twice obtains surveying waveform, if gone out at the same time
Now flaw echo then proves that the repairing quality in area to be detected has defect, and artificial scarce in depth of defect and first time detection
It is identical to fall into depth.
It as a preferred solution of the present invention, include at least two layings, the stepped distribution of laying in laying area；To having a competition
Block is equipped at least two artificial defects, one of them is set to a laying, another is set to another laying.
The depth of defect is different, it will keeps the time of occurrence of defect and wave amplitude different.Therefore, have extremely in laying area
Few two layings, the defects of area to be detected is likely located in any depth in laying area.And for the defect of different depth,
The time that its flaw echo occurs is variant.In order to measure depth of defect, it is arranged at least two in reference block and manually lacks
It falls into, artificial defect is located in different layings, and by this design, the depth regardless of defect in area to be detected is being compared
In test block, it can find artificial defect and be corresponding to it.
Specifically, the quantity of artificial defect is determined according to the laying amount in laying area in reference block, it may be assumed that in laying area
In each laying, it is provided at least one artificial defect.When detecting, an artificial defect is first directed in reference block
It is detected, and debugs detection sensitivity, then detected in detecting domains corresponding with the artificial defect, to offset defect
Adverse effect of the depth difference to testing result sensitivity.
As a preferred solution of the present invention, artificial defect, artificial defect and glue in non-patch area are equipped in non-patch area
Film is adjacent.
It is influenced since glue film has the echo position of defect and wave amplitude, it may be assumed that for the defect in same depth, if wherein
One is located in laying area, another is located in non-patch area, since laying area and non-patch area are separated by glue film, time of the two
Wave wave amplitude and echo time can differences.In order to eliminate this factor to the adverse effect of testing result, for reference block
Same laying, artificial defect is respectively provided in laying area and non-patch area, to eliminate glue film to the unfavorable shadow of testing result
It rings.
As a preferred solution of the present invention, artificial defect and laying in the circumferential direction in laying area, in non-patch area
Artificial defect in area is staggered.
It is arranged in a manner mentioned above, can be avoided survey and two artificial defects in one test, to guarantee to detect
As a result accuracy.
As a preferred solution of the present invention, artificial defect is sized to, acceptable minimum scarce in design standard
Sunken size.
The design of artificial defect size is carried out in the manner described above, in the detection, it is only necessary to compare echo in measured waveform
The size of echo wave amplitude in wave amplitude and reference waveform enables the result of detection more intuitive.
Specifically, if the wave amplitude of the defects of measured waveform echo is greater than or equal to the wave of the defects of reference waveform echo
Width, and in measured waveform flaw echo occur time and reference waveform in flaw echo occur time consistency, then it is to be detected
There are unacceptable defects for the corresponding depth of Qu Zhongyu artificial defect.
As a preferred solution of the present invention, artificial defect is made of high ultrasonic attenuation materials.
The defect type generated in area to be tested is usually the stratiform air (being layered) in material.Highly attenuating material with
Between composite material because between the reflectivity and the sound intensity, with air and composite material of ultrasonic wave caused by acoustic impedance difference because of acoustic resistance
The reflectivity and the sound intensity of ultrasonic wave caused by robust is different, the reflectivity and the sound intensity of the two are relatively, it is possible to highly attenuating
Material proximate is regarded as air, to go simulation the defects of area to be tested by artificial defect, and to reference block and to
The waveform of detection zone compares, and realizes defects detection.
It is and compound it will be understood by those skilled in the art that above-mentioned high ultrasonic attenuation materials refer to according to above-mentioned principle
Between material because between the reflectivity and the sound intensity, with air and composite material of ultrasonic wave caused by acoustic impedance difference because of acoustic impedance difference
The reflectivity and the sound intensity of ultrasonic wave caused by different, the material of the reflectivity and the sound intensity of the two relatively.
As a preferred solution of the present invention, the material of artificial defect includes polytetrafluoroethylene (PTFE) or lead.
As a preferred solution of the present invention, artificial defect by being embedded in reference block in advance, the gold with release agent coating
Belong to and generating.
In order to simulate the stratiform air in area to be tested material, artificial defect can also be arranged in this way: compare in processing
When test block, the metal with release agent coating is placed in the composite, and composite material is carried out in heat cure forming process, by
Different from Thermal expansion coefficient of composites in metal, metal surface release agent promotes to be detached between metal and composite material, thus
Stratiform air (being layered) is formed, in reference block to generate artificial defect.
In conclusion by adopting the above-described technical solution, the beneficial effects of the present invention are:
1. between the defects detection for carrying out area to be detected each time, by carrying out sensitivity to the detection of reference block
Adjusting, human factor can be effectively reduced to the adverse effect of testing result；
2. the artificial defect provided with multiple and different positions of reference block, adjustable range can correspond to area to be detected
Any position in domain be accurately detected the defect of any position in area to be detected can；
3. the glue film two sides in reference block are provided with artificial defect, glue film is eliminated to the unfavorable shadow of testing result
It rings.
Detailed description of the invention
Fig. 1 is the Longitudinal cross section schematic of reference block provided by the invention.
Fig. 2 is the top view of reference block provided by the invention.
Fig. 3 is the Longitudinal cross section schematic of area to be tested of the invention.
Fig. 4 a) it is the schematic diagram for being located at laying area and artificial defect corresponding with center laying in reference block；
Fig. 4 b) be Qu Shangyu Fig. 4 a to be detected) in the corresponding detecting domains of artificial defect schematic diagram.
Fig. 5 a) it is the schematic diagram for being located at laying area and artificial defect corresponding with the first laying in reference block；
Fig. 5 b) be Qu Shangyu Fig. 5 a to be detected) in the corresponding detecting domains of artificial defect schematic diagram.
Fig. 6 a) it is the schematic diagram for being located at laying area and artificial defect corresponding with the second laying in reference block；
Fig. 6 b) be Qu Shangyu Fig. 6 a to be detected) in the corresponding detecting domains of artificial defect schematic diagram.
Fig. 7 a) it is the schematic diagram for being located at laying area and artificial defect corresponding with third laying in reference block；
Fig. 7 b) be Qu Shangyu Fig. 7 a to be detected) in the corresponding detecting domains of artificial defect schematic diagram.
Fig. 8 a) it is the schematic diagram for being located at laying area and artificial defect corresponding with the 4th laying in reference block；
Fig. 8 b) be Qu Shangyu Fig. 8 a to be detected) in the corresponding detecting domains of artificial defect schematic diagram.
Fig. 9 a) it is the schematic diagram for being located at non-patch area and artificial defect corresponding with center laying in reference block；
Fig. 9 b) be Qu Shangyu Fig. 9 a to be detected) in the corresponding detecting domains of artificial defect schematic diagram.
Figure 10 a) it is the schematic diagram for being located at non-patch area and artificial defect corresponding with the first staggered floor area in reference block；
Figure 10 b) be Qu Shangyu Figure 10 a to be detected) in the corresponding detecting domains of artificial defect schematic diagram.
Figure 11 a) it is the schematic diagram for being located at non-patch area and artificial defect corresponding with the second staggered floor area in reference block；
Figure 11 b) be Qu Shangyu Figure 11 a to be detected) in the corresponding detecting domains of artificial defect schematic diagram.
Figure 12 a) it is the schematic diagram for being located at non-patch area and artificial defect corresponding with third staggered floor area in reference block；
Figure 12 b) be Qu Shangyu Figure 12 a to be detected) in the corresponding detecting domains of artificial defect schematic diagram.
Figure 13 a) it is the schematic diagram for being located at non-patch area and artificial defect corresponding with the 4th staggered floor area in reference block；
Figure 13 b) be Qu Shangyu Figure 13 a to be detected) in the corresponding detecting domains of artificial defect schematic diagram.
Icon: 1- reference block；The non-patch area of 11-；12- glue film；13- laying area；15- artificial defect；131- first is spread
Layer；The second laying of 132-；133- third laying；The 4th laying of 134-；The center 138- laying；The area to be detected 2-；21- detecting domains.
Specific embodiment
With reference to the accompanying drawing, the present invention is described in detail.
In order to make the objectives, technical solutions, and advantages of the present invention clearer, with reference to the accompanying drawings and embodiments, right
The present invention is further elaborated.It should be appreciated that described herein, specific examples are only used to explain the present invention, not
For limiting the present invention.
Embodiment
Please refer to Fig. 1-Figure 13.The embodiment of the invention provides a kind of reference blocks 1.This reference block 1 is for repairing
Quality evaluating method.The repairing quality evaluation method can be used in detecting the repairing matter of composite material staged digging repair area
Amount.
In the present embodiment, reference block 1 makes referring to the structure snd size in area 2 to be detected, for simulating area to be detected
2。
Specifically, area 2 to be detected includes non-patch area 11, laying area 13 and glue film 12, the laying area 13 includes being embedded
At least one laying in non-patch area 11, glue film 12 are set between laying area 13 and non-patch area 11.
Reference block 1 includes non-patch area 11, laying area 13 and glue film 12.In reference block 1, laying area 13 is embedded at not
In patch area 11, glue film 12 is set between laying area 13 and non-patch area 11.Laying area 13 and area to be detected in reference block 1
The structure in the laying area 13 in 2 is identical.Glue film 12 in reference block 1 is identical as the structure of glue film 12 in area 2 to be detected.
Further, center laying 138, the first laying 131, the second laying 132, third laying are equipped in laying area 13
133 and the 4th laying 134.Center laying 138, the first laying 131, the second laying 132, third laying 133 and the 4th laying 134
Stepped distribution.
Wherein, the area of center laying 138 is less than the first laying 131, and the area of the first laying 131 is less than the second laying
132, the area of the second laying 132 is less than third laying 133, and the area of third laying 133 is less than the 4th laying 134.
The region Chong Die with center laying 138 is not the first staggered floor area in first laying 131, in the second laying 132 not with
The region that center laying 138 is overlapped is the second staggered floor area, and region Chong Die with center laying 138 is not the in third laying 133
Three staggered floor areas, the region Chong Die with center laying 138 is not the 4th staggered floor area in the 4th laying 134.
Using the structure, the structure in laying area 13 and the region excavated in repairing with it is identical.Glue film 12 and the first mistake
Floor area, the second staggered floor area, third staggered floor area, the 4th staggered floor area and center laying 138 contact.
Artificial defect 15 is equipped in reference block 1.In the present embodiment, artificial defect 15 is made of high ultrasonic attenuation materials.
Specifically, the material of artificial defect 15 is polytetrafluoroethylene (PTFE) or lead.
In the other embodiments of the present embodiment, artificial defect 15 can also be had by being embedded in reference block 1 in advance
The metal of release agent coating generates.
Artificial defect 15 is sized to the size of acceptable minimum defect in design standard.
The position of artificial defect 15 is arranged in the following manner:
For laying area 13: laying 138, the first staggered floor area, the second staggered floor area, third staggered floor area and the 4th staggered floor at center
Artificial defect 15 is arranged in area；
Please refer to Fig. 1 and Fig. 2, for non-patch area 11: with center laying 138, the first staggered floor area, the second staggered floor area,
Artificial defect 15 is arranged in the corresponding position in third staggered floor area and the 4th staggered floor area.Correspondence herein refers to, on non-patch area 11 with
The position of each laying deep equality.
In the other embodiments of invention, the position of the artificial defect 15 in laying area 13 can also be close to each laying
The position at center is not limited solely in staggered floor area.
Referring to Fig. 2, further, in the circumferential direction in laying area 13, the artificial defect 15 in laying area 13 with do not repair
The artificial defect 15 for mending area 11 is mutually staggered, and probe is avoided to measure two artificial defects 15 in one test.
This repairing quality evaluation method the following steps are included:
S1: ultrasound detection is carried out to the artificial defect 15 in reference block 1, detection sensitivity is adjusted, obtains reference waveform；
S2: under the sensitivity, treat detection zone 2 carry out ultrasound detection, obtain measured waveform, and compare measured waveform and
In reference waveform, time and wave amplitude that flaw echo occurs.
Further, there are multiple detecting domains 21, a detecting domains 21 and an artificial defect 15 are right in area 2 to be detected
It answers.If desired step S2 is carried out in different detecting domains 21, then it will be before change detection domain 21, to one in reference block 1
A artificial defect 15 carries out step S1, and the artificial defect 15 is corresponding with the detecting domains 21 after switching, so as to adjust to applicable
In the detection sensitivity of the detecting domains 21.
In detection, used detection frequency is 1.0MHz-20MHz.
It is specific:
Fig. 4 and Fig. 9 is please referred to, for the artificial defect 15 of 138 depth of center laying, corresponding detecting domains 21 are
Region corresponding with center laying 138 on 2 surface of area to be detected；
Fig. 5 and Figure 10 is please referred to, for the artificial defect 15 of the first staggered floor depth, if the artificial defect 15 is located at laying
Area 13, then corresponding detecting domains 21 are region corresponding with the first laying 131 on the surface in area 2 to be detected；If this is artificial
Defect 15 is located at non-patch area 11, then corresponding detecting domains 21 are corresponding with the first staggered floor area on the surface in area 2 to be detected
Annular region；
Fig. 6 and Figure 11 is please referred to, for the artificial defect 15 of the second staggered floor depth, if the artificial defect 15 is located at laying
Area 13, then corresponding detecting domains 21 are region corresponding with the second laying 132 on the surface in area 2 to be detected；If this is artificial
Defect 15 is located at non-patch area 11, then corresponding detecting domains 21 are corresponding with the second staggered floor area on the surface in area 2 to be detected
Annular region；
Fig. 7 and Figure 12 is please referred to, for the artificial defect 15 of third staggered floor depth, if the artificial defect 15 is located at laying
Area 13, then region corresponding with third laying 133 in the corresponding area 2 to be detected of detecting domains 21；If the artificial defect 15
In non-patch area 11, then corresponding detecting domains 21 are annular region corresponding with third staggered floor area in area 2 to be detected；
Fig. 8 and Figure 13 is please referred to, for the artificial defect 15 of 134 depth of the 4th laying, if the artificial defect 15 is located at
Laying area 13, then corresponding detecting domains 21 are region corresponding with the 4th laying 134 on the surface in area 2 to be detected；If should
Artificial defect 15 is located at non-patch area 11, then corresponding detecting domains 21 are corresponding with the 4th staggered floor area in area 2 to be detected
Annular region.
The repairing quality evaluation method is further comprising the steps of:
S3. multiple test points are selected in detecting domains 21 corresponding with the artificial defect 15 in step S1, same sensitive
Under degree, repeat step S2 on each test point in same detecting domains 21.
In conclusion if the test object of step S1 is the artificial defect 15 in non-patch area 11, it is each in step S3
Test point corresponds to the staggered floor area in area 2 to be detected；
If the test object of step S1 is the artificial defect 15 in laying area 13, in step S3, each test point is corresponding
Laying in area 2 to be detected.
Detection example
It is illustrated below using the flaw evaluation of the center laying 138 in area 2 to be detected as example:
Please refer to Fig. 4 a), for the defects of laying area 13:
Ultrasound detection first is carried out in the artificial defect 15 in reference block 1 corresponding to the laying area 13 of center laying 138,
Sensitivity is adjusted, and obtains reference waveform, the flaw echo that artificial defect 15 will occur in reference waveform；
Please refer to Fig. 4 b), then corresponding to one inspection of selection in the detecting domains 21 of the artificial defect 15 in area 2 to be detected
Measuring point obtains the measured waveform of the test point；
Compare reference waveform in and measured waveform, if occur flaw echo in measured waveform, and in measured waveform lack
The wave amplitude for falling into flaw echo in the time consistency, measured waveform that flaw echo occurs in the time and reference waveform that echo occurs is big
In or equal in reference waveform flaw echo wave amplitude, then determine in laying area 13 position corresponding with the test point and with
Center laying 138 is the same as existing defects at the point of depth；
Under same sensitivity, in area 2 to be detected corresponding to the artificial defect 15 detecting domains 21 on choose it is multiple not
With the test point of position, the measured waveform of each test point is measured, and is compared respectively with reference waveform, until test point base
This covering center laying 138.
Please refer to Fig. 9 a), for the defects of non-patch area 11:
It is first ultrasonic corresponding to being carried out in the artificial defect 15 in the non-patch area 11 of center laying 138 in reference block 1
Detection adjusts sensitivity, and obtains reference waveform, the flaw echo that artificial defect 15 will occur in reference waveform；
Please refer to Fig. 9 b), an inspection is then chosen in detecting domains 21 corresponding with the artificial defect 15 in area 2 to be detected
Measuring point obtains the measured waveform of the test point；
Compare reference waveform in and measured waveform, if occur flaw echo in measured waveform, and in measured waveform lack
The wave amplitude for falling into flaw echo in the time consistency, measured waveform that flaw echo occurs in the time and reference waveform that echo occurs is big
In or equal in reference waveform flaw echo wave amplitude, then determine in non-patch area 11 position corresponding with the test point and
With center laying 138 with existing defects at the point of depth；
Under same sensitivity, in area 2 to be detected corresponding to the artificial defect 15 detecting domains 21 on choose it is multiple not
With the test point of position, the measured waveform of each test point is measured, and is compared respectively with reference waveform, until test point base
This covering center laying 138.
By above-mentioned mode, sensitivity is adjusted respectively in each artificial defect 15 of reference block 1, and to be detected
Each detecting domains 21 in area 2 are detected respectively, it can realize the complete detection for treating detection zone 2.
The beneficial effect of reference block 1 provided by the invention is:
1. sensitive by being carried out to the detection of reference block 1 between the defects detection for carrying out area 2 to be detected each time
The adjusting of degree can effectively reduce human factor to the adverse effect of testing result；
2. the artificial defect 15 provided with multiple and different positions of reference block 1, adjustable range can correspond to be checked
Any position for surveying area 2, be accurately detected the defect of any position in area 2 to be detected can；
3. eliminating glue film 12 to testing result in the artificial defect 15 that 12 two sides of glue film of reference block 1 are provided with
Adverse effect.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention
Made any modifications, equivalent replacements, and improvements etc., should all be included in the protection scope of the present invention within mind and principle.
Claims (8)
1. a kind of reference block, for simulating the area to be tested after damage reparation, which is characterized in that including non-patch area, paving
Floor area and glue film, the laying area include at least one laying being embedded in non-patch area, and glue film is set to laying Qu Yuwei and repairs
It mends between area；
Artificial defect is equipped in the reference block.
2. reference block according to claim 1, which is characterized in that include at least two layings, the paving in laying area
The stepped distribution of layer；
The reference block is equipped at least two artificial defects, one of them is set to a laying, another is set to another
Laying.
3. reference block according to claim 1 or 2, which is characterized in that be equipped with artificial defect, institute in the non-patch area
The artificial defect stated in non-patch area is adjacent with the glue film.
4. reference block according to claim 3, which is characterized in that in the circumferential direction in the laying area, it is described not
Artificial defect in patch area is staggered with the artificial defect in the laying area.
5. reference block according to claim 1, which is characterized in that the artificial defect is sized to, design mark
The size of acceptable minimum defect in standard.
6. according to claim 1, reference block described in any one of 2 or 5, which is characterized in that the artificial defect is by height
Ultrasonic attenuation materials are made.
7. reference block according to claim 5, which is characterized in that the material of the artificial defect includes polytetrafluoroethylene (PTFE)
Or lead.
8. according to claim 1, reference block described in any one of 2 or 5, which is characterized in that the artificial defect is by pre-
It is embedded in reference block, the metal with release agent coating generates.
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| CN201810160031.1A CN110196286A (en) | 2018-02-26 | 2018-02-26 | A kind of reference block |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112630308A (en) * | 2020-12-17 | 2021-04-09 | 中航复合材料有限责任公司 | Test block for ultrasonic detection after composite material repair |
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