CN106767567A  A kind of largesized composite material component pastes mould degree noncontact detection method  Google Patents
A kind of largesized composite material component pastes mould degree noncontact detection method Download PDFInfo
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 CN106767567A CN106767567A CN201611076720.1A CN201611076720A CN106767567A CN 106767567 A CN106767567 A CN 106767567A CN 201611076720 A CN201611076720 A CN 201611076720A CN 106767567 A CN106767567 A CN 106767567A
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 239000002131 composite materials Substances 0.000 title claims abstract description 67
 238000001514 detection method Methods 0.000 title claims abstract description 14
 239000006072 pastes Substances 0.000 title abstract description 3
 238000007493 shaping process Methods 0.000 claims abstract description 16
 239000011159 matrix materials Substances 0.000 claims abstract description 13
 239000000463 materials Substances 0.000 claims abstract description 11
 238000000465 moulding Methods 0.000 claims abstract description 10
 238000006243 chemical reactions Methods 0.000 claims abstract description 7
 238000004364 calculation methods Methods 0.000 claims abstract description 4
 238000000034 method Methods 0.000 claims description 13
 230000011218 segmentation Effects 0.000 claims description 12
 230000001131 transforming Effects 0.000 claims description 5
 230000000875 corresponding Effects 0.000 claims description 4
 229950008597 drug INN Drugs 0.000 claims description 2
 238000005259 measurement Methods 0.000 claims 21
 238000004441 surface measurement Methods 0.000 description 6
 238000005516 engineering processes Methods 0.000 description 4
 238000004458 analytical methods Methods 0.000 description 3
 229910001374 Invar Inorganic materials 0.000 description 2
 238000010586 diagrams Methods 0.000 description 2
 238000004519 manufacturing process Methods 0.000 description 2
 238000002679 ablation Methods 0.000 description 1
 238000003556 assay method Methods 0.000 description 1
 230000015572 biosynthetic process Effects 0.000 description 1
 238000009530 blood pressure measurement Methods 0.000 description 1
 239000008264 clouds Substances 0.000 description 1
 150000001875 compounds Chemical class 0.000 description 1
 230000005494 condensation Effects 0.000 description 1
 238000009833 condensation Methods 0.000 description 1
 239000004744 fabrics Substances 0.000 description 1
 238000005755 formation reactions Methods 0.000 description 1
 239000010903 husk Substances 0.000 description 1
 238000007689 inspection Methods 0.000 description 1
 238000010030 laminating Methods 0.000 description 1
 238000003754 machining Methods 0.000 description 1
 238000009659 nondestructive testing Methods 0.000 description 1
 230000003068 static Effects 0.000 description 1
 238000004450 types of analysis Methods 0.000 description 1
Classifications

 G—PHYSICS
 G01—MEASURING; TESTING
 G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
 G01B11/00—Measuring arrangements characterised by the use of optical means
 G01B11/30—Measuring arrangements characterised by the use of optical means for measuring roughness or irregularity of surfaces
Abstract
A kind of largesized composite material component pastes mould degree noncontact detection method, and step is as follows：1) benchmaring point is arranged in composite material shaping mould surrounding；2) using camera measurement benchmaring point coordinates is measured, the coordinate value under measurement coordinate system is obtained, obtains the transition matrix between measurement coordinate system and mould theoretical coordinate system；3) coordinate conversion matrix set up according to previous step, data point is transformed under theoretical coordinate system from measurement coordinate system；4) shaped component, Measurement die molded surface data dot values are removed, and is converted it under theoretical coordinate system；5) molding thickness of composite material structural member is measured using calibrator；6) with reference to step 4) the molding surface data dot values surveyed calculate the patch mould degree of composite shaped component；By above step, it is capable of the patch mould degree of the quick multiple material shaped component of survey calculation, it is to avoid because of the error that the weak rigidity of composite is produced, certainty of measurement is higher.
Description
Technical field
The present invention provides a kind of largesized composite material component patch mould degree noncontact detection method, and it is using a kind of compound
The noncontact detection method of material surface pad pasting degree, belongs to aircraft largesized composite material geometric features and manufactures and designs field.
Background technology
Aircraft of new generation proposes requirements at the higher level to stability, economy, security, multiple compared with traditional aeronautical material
Condensation material has many advantages, such as high specific strength, high specific stiffness, resistance to ablation.Additionally, composite element does not need secondary operation,
Structural integrity is strong, high in machining efficiency, therefore composite is usually used in the overall processing manufacture of largesized structural parts.Composite system
Making process and selfcharacteristic causes multiple material component inside defect easily occur, and current composite digitalization test is mainly concentrated
In the NonDestructive Testing of multiple material component inside defect.But with the manufacture application of global formation composite element, component
Geometric properties are received more and more attention to performance impact.Particularly largesized composite material component, appearance and size is big, rigidity
Weak, complex structure, matching requirements are high, and quality is not easy to ensure.In addition, largesized composite material component be used for airframe or
Wing cover, surface geometrical features (such as percent ripple, pad pasting degree) directly affect aircraft product quality.Document " aircraft RVSM systems
System analysis and test " (all grain husk aircraft RVSM network analyses and test [J] tech enterprises in China, 2010 (13):910.)
In analyze the surface characteristics of aircraft surfaces some special areas and can produce larger shadow to the aerodynamic characteristic of aircraft and flying quality
Ring, such as：Pitot and near zone surface condition can influence sensor pressure measurement, and then influence aircraft to test the speed；Static pressure
Mouth and near zone surface condition directly affect civil aircraft and reduce the Airworthiness Certification that minimum vertical is spaced (RVSM) service ability.
3D photography e measurement technology is to shoot a number of digitized map in diverse location and direction by special camera
Piece, these pictures cover all measurement points on region to be measured, are entered by processing after correlation technologies such as computer picture matchings
Row splicing and amendment, finally give the cloud data of all measurement points.Document " the aircraft surfaces ripple based on threedimensional measurement technology
(Jin Ding, Wu Jian are based on the aircraft surfaces percent ripple digital assay method of threedimensional measurement technology to degree digitlization analysis method "
[J] aeronautical engineerings are in progress, and 2013 (1):8589.) describe laser scanning method and structure is obtained on airframe material covering
Surface geometrical property, and percent ripple is analyzed.However, being obtained to surface geometrical property to 3dimensional digital Photographic technique in document
Method do not describe in detail.Especially for the 3dimensional digital Photographic technique of composite pad pasting degree, needed in measurement process
Consider the thickness characteristics of composite element and mould.It is domestic current still few to the acquisition of pad pasting degree and analysis, to top
The surface characteristics result that method is obtained is not the desired result for analyzing pad pasting degree.
The content of the invention
The invention aims to overcome the shortcomings of current largesized composite material structural member geometric shape detection technique,
The detection method of mould degree is pasted there is provided a kind of largesized composite material component based on photogrammetry technique.
A kind of largesized composite material component patch mould degree noncontact detection method of the present invention, comprises the following steps：
Step 1) some benchmaring points are arranged in composite material shaping mould surrounding, and can be when being imaged each time
Measured camera calibration is arrived；
Step 2) using camera measurement benchmaring point coordinates is measured, the coordinate value under measurement coordinate system is obtained, using most
A young waiter in a wineshop or an inn multiplies relation, solves the transition matrix between measurement coordinate system and mould theoretical coordinate system；
Step 3) etc. composite material structural member shaping terminate, using measure camera, cultellation device measurement shaping after composite
The data dot values of inner surface of component, according to the coordinate conversion matrix that previous step is set up, data point are transformed into from measurement coordinate system
Under theoretical coordinate system；
Step 4) remove shaped component, and step 3) identical, Measurement die molded surface data dot values, it is fitted mould molding
Face, and convert it under theoretical coordinate system；
Step 5) using the molding thickness of calibrator measurement composite material structural member；
Step 6) according to step 3) the inner surface of component data dot values surveyed and component thickness, using segmentation sphere approximatioss
Calculate the offset distance point of inner surface.Finally combining step 4) the molding surface data dot values surveyed calculate composite shaping structure
The patch mould degree of part.
Wherein, in step 1) described in " arranging some benchmaring points in composite material shaping mould surrounding ", i.e. " cloth
Put benchmaring hole ", refer to, in mold design, hole to be added in the surrounding of mould, specifically mould surrounding with " hole "
Add arrangement some benchmaring points, it is desirable to can measured camera measurement to and do not influence mould molding component；This some holes with
Mould is manufactured together, and with certain precision.
Wherein, in step 2) described in " solve the conversion square between measurement coordinate system and mould theoretical coordinate system
Battle array ", the process that it is solved is as follows：
If the design coordinate in benchmaring hole is P_{i}[x_{Pi} y_{Pi} z_{Pi}], it is J using the coordinate for measuring camera measurement_{i}[x_{Ji}
y_{Ji} z_{Ji}].Assuming that measurement coordinate system is rotating around X, Y, Z axis rotation alpha, β, γ angle, along X, Y, Z axis difference translation Δ x, Δ y, Δ
Overlapped with mould theoretical coordinate system after z, then coordinate of the benchmaring point under theoretical coordinate system and measurement coordinate system is present such as
Under coordinate transformation relation：
P_{i} ^{T}=RJ_{i} ^{T}+ T (i=1,2 ..., 6) (1)
Wherein R is 3 × 3 coordinate spin matrix, can be written as form：
T is motion vector [Δ x Δ y Δs z]^{T}。
The object function set up using least square method：
(2) X=[α β γ Δ x Δ y Δs z] in formula.The coordinate value of datum mark is substituted into (2) formula, (2) formula is write a Chinese character in simplified form
For：
In formula (3)Implication it is as follows：
Using Newton iteration method, the minimum value of object function F (X), iterative formula is asked to be：
Finally try to achieve the transition matrix R and T between theoretical coordinate system and measurement coordinate system.
Wherein, in step 3) described in " measurement shaping after composite element inner surface data dot values ", refer to profit
Composite material structural member inner surface point is gathered with measurement camera, process is as follows：
1. luminous point is projected on composite element inner surface using cultellation device, as measurement identification point；
2. reasonable Arrangement encoded point and gauge in measurement range；
3. using measurement camera, composite element is shot from various angles；
4. photo is transferred to computer, composite element inner surface data point is extracted by interpretation software and is sat
Mark.
Wherein, in step 3) described in " data point is transformed under theoretical coordinate system from measurement coordinate system ", refer to profit
With step 2) required by transformation matrix R and T, composite element inner surface data point coordinates is transformed into mould from measurement coordinate system
Under tool theoretical coordinate system, formula is as follows：
D′_{i} ^{T}=RD_{i} ^{T}+ T (i=1,2 ...) (5)
(5) in formula, D_{i}It is ith data point of composite element inner surface, D '_{i}Be be transformed under theoretical coordinate system it is relative
The point coordinates answered.
Wherein, in step 6) described in " the offset distance point of inner surface is calculated using segmentation sphere approximatioss ", its calculating side
Method is as follows：
1. composite material structural member inner surface (wellknown theory model), to N deciles are carried out, is obtained into (N+ along u to v respectively
1) the individual mesh point p of × (N+1)Segmentation times are initially designated as s=1.Often split a patch afterwards, then split
Number of times s adds 1；
2. measuring point P is calculated to all mesh point distances, obtains the mesh point closest with P pointsPoint u and v directions
Parameter value isThen measuring point P must fall within the upper intersection point of curved surfaceFour pieces of patch around point are constituted
PatchOn, the corresponding node thresholding of the patch is changed into
3. continue to patchAlong u to, to N deciles, segmentation times add 1 with v.Then measuring point is calculated to newlygenerated
Each mesh pointDistance, obtain away from measuring point P beelinesPoint and withWith u to former and later two
Mesh pointWithChoosePoint left side or right side same v to mesh pointUsing this four node fitting balls
FaceThe radius of the sphere isThe centre of sphere isObtain measuring point P to the centre of sphereApart from h, then measuring point P is to bent
The distance in face isIfThen stop segmentation, the offset distance point of measuring point P to curved surface isThis step is otherwise repeated, continues to split.
By above step, it is capable of the patch mould degree of the quick multiple material shaped component of survey calculation, it is to avoid because composite is weak
The error that rigidity is produced, certainty of measurement is higher.
The present invention has the advantage that compared with prior art：
1) advanced contactless Digital Measuring Technique is employed, there is provided a kind of new patch mould degree survey calculation side
Method；
2) the weak rigidity characteris of largesized composite material structural member are overcome, can accurately measure multiple material mould surface and
The geometry of composite element, has good directive function to mould and multiple material structure member design.
Brief description of the drawings
Fig. 1 the method for the invention flow charts.
Schematic diagram is arranged in Fig. 2 mould benchmark monitoring point.
Fig. 3 mould surfaces measuring point and fitting schematic diagram.
Sequence number, symbol, code name are described as follows in figure：
P in Fig. 2_{1}To P_{6}Represent benchmaring point position.
Specific embodiment
The invention provides one kind using digitized measurement largesized composite material structural member forming process patch Mo Du get Fei
Contact detecting method.By setting datum mark on mould, measurement camera is taken pictures and obtains mould surface and composite shaping
Inner surface of component threedimensional information, Coordinate Conversion is realized with mould.The thickness of composite shaped component is measured, then using segmentation
Sphere approximatioss asks for the offset distance point of shaped component inner surface measuring point, finally calculates the patch mould degree of shaped component.The method
Not only it is avoided that because of distortion inaccuracy caused by the weak rigidity of composite shaped component, and its measurement point is more, can be more complete
Reflection mould and the truth on shaped component surface, meet the patch mould degree inspection of largesized composite material shaped component in engineering
Survey.
A kind of largesized composite material component patch mould degree noncontact detection method of the present invention, shown in Fig. 1, its specific implementation step
It is rapid as follows：
1) in mold design, 4~6 benchmaring points of arrangement are added in mould surrounding, and being capable of measured camera survey
Measure；
These described benchmaring points refer to processing in mould surrounding, it is desirable to do not influence mould molding component and have
The hole of certain precision；This some holes is manufactured with mould, and with certain positional precision；
2) after composite material structural member shaping is completed, shaped component is not moved, camera is measured on 6 benchmaring points
Special measurement target ball, encoded point paster is affixed on shaped component surface, and encoded point number is 3050, is paved with whole survey
Amount type face region.Using invar rod as measurement base object staff, corresponding measurement profile surface is placed on.Using measuring camera and cultellation
Device is measured to product surface, obtains measurement of the measured value shaped component inner surface of benchmaring point under measurement coordinate system
Data point；
3) least square method is used, the transformational relation of measurement coordinate system and mould theoretical coordinate system is obtained, and structure will be molded
Part Inner surface measurement data point is transformed under mould theoretical coordinate system from measurement coordinate system；
4) shaped component is removed, 1) step and 2) step, the data point of Measurement die forming surface is repeated；
5) shaped component thickness is measured using calibrator, shaped component Inner surface measurement is asked for using sphere approximatioss is split
The offset distance point of point, the i.e. actual value of its outer surface；
6) compare the measured value and shaped component outer surface actual value of mould surface, draw whole shaped component outer surface
Laminating degree and mould surface between.
It is below embodiment：
By taking the shaping patch mould degree detection of composite airplane wings wing box as an example, embodiments of the present invention are briefly explained.
1) 6 benchmaring point P1~P6 are machined with the design of mould surrounding, 6 benchmaring points are wrapped as far as possible
Network die surface, its aperture is Φ 6.35mm, as shown in Figure 2.
2) after the completion of wing boxes of wings shaping, measurement camera target ball is placed on datum mark, sticks encoded point paster, encoded point
Paster is paved with this measured zone.
3) 1100mm invar rod is used as measurement base object staff, is placed on shaped component side.Using measuring camera and cultellation
Device is measured to product surface, obtains the measured value J of benchmaring point_{i}(x, y, z) (being shown in Table 1) and shaped component inner surface
Measurement data points under measurement coordinate system.
4) transformational relation between measurement coordinate system and mould theoretical coordinate system, conversion parameter are obtained using least square method
Solving result is T={ 0.3495 °, 3.5914 °, 1.4282 °, 9295.5623, 2677.9613,10771.4523 }, and will
Shaped component Inner surface measurement data point is transformed under mould theoretical coordinate system, and transformation result is shown in Table 2.
The basis points of table 1 are in theoretical coordinate system and the coordinate value (unit mm) of measurement coordinate system
The inner surface of component measurement point of table 2 is in theoretical coordinate system and the coordinate value (unit mm) of measurement coordinate system
5) remove shaped component, repeat 2)~4), the measurement data of 6 benchmaring points of measurement and mould surface, and
Mould theoretical coordinate system is converted it to, measurement data is shown in Table 3 and table 4, and fitting result is shown in Fig. 3.
The basis points of table 3 are in theoretical coordinate system and the coordinate value (unit mm) of measurement coordinate system
The mould surface measurement point of table 4 is in theoretical coordinate system and the coordinate value (unit mm) of measurement coordinate system
6) shaped component thickness is measured, and component thickness is divided, asked in component using sphere approximatioss is split
The offset distance point of surface measurement point, i.e. external surface of structural member point.Die face with fitting is calculated, that is, obtain the patch of the shaped component
Mould degree.
Nonelaborated part of the present invention belongs to techniques known.
The above, part specific embodiment only of the present invention, but protection scope of the present invention is not limited thereto, and appoints
What those skilled in the art the invention discloses technical scope in, the conversion or replacement that can be readily occurred in should all be covered
Within protection scope of the present invention.
Claims (6)
1. a kind of largesized composite material component pastes mould degree noncontact detection method, it is characterised in that：Comprise the following steps：
Step 1) composite material shaping mould surrounding arrange benchmaring point, and can each time be imaged when measured phase
Machine examination is measured；
Step 2) using camera measurement benchmaring point coordinates is measured, the coordinate value under measurement coordinate system is obtained, using a most young waiter in a wineshop or an inn
Multiply relation, solve the transition matrix between measurement coordinate system and mould theoretical coordinate system；
Step 3) etc. composite material structural member shaping terminate, using measure camera, cultellation device measurement shaping after composite element
The data dot values of inner surface, according to the coordinate conversion matrix that previous step is set up, data point is transformed into theory from measurement coordinate system
Under coordinate system；
Step 4) remove shaped component, and step 3) identical, Measurement die molded surface data dot values, mould surface is fitted,
And convert it under theoretical coordinate system；
Step 5) using the molding thickness of calibrator measurement composite material structural member；
Step 6) according to step 3) the inner surface of component data dot values surveyed and component thickness, calculated using segmentation sphere approximatioss
The offset distance point of inner surface；Finally combining step 4) the molding surface data dot values surveyed calculate composite shaped component
Patch mould degree；
By above step, it is capable of the patch mould degree of the quick multiple material shaped component of survey calculation, it is to avoid because of the weak rigidity of composite
The error of generation, certainty of measurement is high.
2. a kind of largesized composite material component according to claim 1 pastes mould degree noncontact detection method, and its feature exists
In：
In step 1) described in " in composite material shaping mould surrounding arrangement benchmaring point ", i.e. " arrangement benchmaring
Hole ", refers to, in mold design, hole to be added in the surrounding of mould, and specifically the surrounding in mould adds arrangement one with " hole "
A little benchmaring points, it is desirable to can measured camera measurement to and do not influence mould molding component；This some holes is with mould system
Make, and with predetermined precision.
3. a kind of largesized composite material component according to claim 1 pastes mould degree noncontact detection method, and its feature exists
In：
In step 2) described in " solving the transition matrix between measurement coordinate system and mould theoretical coordinate system ",
The process that it is solved is as follows：
If the design coordinate in benchmaring hole is P_{i}[x_{Pi} y_{Pi} z_{Pi}], it is J using the coordinate for measuring camera measurement_{i}[x_{Ji} y_{Ji}
z_{Ji}]；Assuming that measurement coordinate system is rotating around X, Y, Z axis rotation alpha, β, γ angle, after X, Y, Z axis difference translation Δ x, Δ y, Δ z
System overlaps with mould theoretical coordinate, then coordinate of the benchmaring point under theoretical coordinate system and measurement coordinate system exists following
Coordinate transformation relation：
P_{i} ^{T}=RJ_{i} ^{T}+ T (i=1,2 ..., 6) (1)
Wherein：R is 3 × 3 coordinate spin matrix, is written as form：
T is motion vector [Δ x Δ y Δs z]^{T}；
The object function set up using least square method：
X=[α β γ Δ x Δ y Δs z] in formula (2)；The coordinate value of datum mark is substituted into (2) formula, formula (2) is abbreviated as：
In formula (3)Implication it is as follows：
Using Newton iteration method, the minimum value of object function F (X), iterative formula is asked to be：
Finally try to achieve the transition matrix R and T between theoretical coordinate system and measurement coordinate system.
4. a kind of largesized composite material component according to claim 1 pastes mould degree noncontact detection method, and its feature exists
In：
In step 3) described in " measurement shaping after data dot values of the composite element inner surface under measurement coordinate system ", be
Refer to that process is as follows using camera collection composite material structural member inner surface point is measured：
1. luminous point is projected on composite element inner surface using cultellation device, as measurement identification point；
2. reasonable Arrangement encoded point and gauge in measurement range；
3. using measurement camera, composite element is shot from various angles；
4. photo is transferred to computer, composite element inner surface data point coordinates is extracted by interpretation software.
5. a kind of largesized composite material component according to claim 1 pastes mould degree noncontact detection method, and its feature exists
In：
In step 3) described in " data point is transformed under theoretical coordinate system from measurement coordinate system ", refer to using step 2) institute
The transformation matrix R and T for asking, mould theoretical coordinate is transformed into by composite element inner surface data point coordinates from measurement coordinate system
Under system, formula is as follows：
D′_{i} ^{T}=RD_{i} ^{T}+ T (i=1,2 ...) (5)
In formula (5), D_{i}It is ith data point of composite element inner surface, D '_{i}It is transformed into corresponding under theoretical coordinate system
Point coordinates.
6. a kind of largesized composite material component according to claim 1 pastes mould degree noncontact detection method, and its feature exists
In：
In step 6) described in " the offset distance point of inner surface is calculated using segmentation sphere approximatioss ", its computational methods is as follows：
1. composite material structural member inner surface, to N deciles are carried out, is obtained into the individual mesh points of (N+1) × (N+1) along u to v respectivelySegmentation times are initially designated as s=1；Often split a patch afterwards, then segmentation times s adds 1；
2. measuring point P is calculated to all mesh point distances, obtains the mesh point closest with P pointsPoint u and the parameter in v directions
It is worth and isThen measuring point P must fall within the upper intersection point of curved surfaceThe song that four pieces of patch around point are constituted
Dough sheetOn, the corresponding node thresholding of the patch is changed into
3. continue to patchAlong u to, to N deciles, segmentation times add 1 with v, measuring point to newlygenerated each is then calculated
Mesh pointDistance, obtain away from measuring point P beelinesPoint and withWith u to former and later two grids
PointWithChoosePoint left side or right side same v to mesh pointUsing this four node fit spheresThe radius of the sphere isThe centre of sphere isObtain measuring point P to the centre of sphereApart from h, then measuring point P is to curved surface
Distance beIfThen stop segmentation, the offset distance point of measuring point P to curved surface is
This step is otherwise repeated, continues to split.
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Cited By (6)
Publication number  Priority date  Publication date  Assignee  Title 

CN107552965A (en) *  20170928  20180109  惠州市洛玛科技有限公司  Accurate marking device and its marking method 
CN109029285A (en) *  20180706  20181218  江西洪都航空工业集团有限责任公司  Merge the hybrid measurement method of contact type measurement and noncpntact measurement 
CN109579760A (en) *  20181122  20190405  北京航天计量测试技术研究所  A kind of measurement method of shaped face heat shield molding thickness 
CN109631773A (en) *  20181122  20190416  成都飞机工业（集团）有限责任公司  A kind of pneumatic face Surface inspection method of composite material parts based on shaping mould 
CN110823801A (en) *  20191023  20200221  南京玻璃纤维研究设计院有限公司  Method for measuring mold sticking performance of prefabricated body 
WO2020228504A1 (en) *  20190513  20201119  深圳中科飞测科技有限公司  Detection method and detection system 

2016
 20161129 CN CN201611076720.1A patent/CN106767567A/en active Pending
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何改云: "基于分割球面逼近的复杂曲面轮廓度误差评定", 《计算机集成制造系统》 * 
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Cited By (7)
Publication number  Priority date  Publication date  Assignee  Title 

CN107552965A (en) *  20170928  20180109  惠州市洛玛科技有限公司  Accurate marking device and its marking method 
CN109029285A (en) *  20180706  20181218  江西洪都航空工业集团有限责任公司  Merge the hybrid measurement method of contact type measurement and noncpntact measurement 
CN109029285B (en) *  20180706  20200828  江西洪都航空工业集团有限责任公司  Hybrid measurement method integrating contact measurement and noncontact measurement 
CN109579760A (en) *  20181122  20190405  北京航天计量测试技术研究所  A kind of measurement method of shaped face heat shield molding thickness 
CN109631773A (en) *  20181122  20190416  成都飞机工业（集团）有限责任公司  A kind of pneumatic face Surface inspection method of composite material parts based on shaping mould 
WO2020228504A1 (en) *  20190513  20201119  深圳中科飞测科技有限公司  Detection method and detection system 
CN110823801A (en) *  20191023  20200221  南京玻璃纤维研究设计院有限公司  Method for measuring mold sticking performance of prefabricated body 
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