CN106872521A - Automatic placement defect dynamic on-line monitoring device and method based on infrared imaging - Google Patents
Automatic placement defect dynamic on-line monitoring device and method based on infrared imaging Download PDFInfo
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- CN106872521A CN106872521A CN201710085411.9A CN201710085411A CN106872521A CN 106872521 A CN106872521 A CN 106872521A CN 201710085411 A CN201710085411 A CN 201710085411A CN 106872521 A CN106872521 A CN 106872521A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N25/00—Investigating or analyzing materials by the use of thermal means
- G01N25/72—Investigating presence of flaws
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Abstract
The invention discloses a kind of automatic placement defect dynamic on-line monitoring device and method based on infrared imaging, including laying device and defect detecting device, the laying device includes charging tray, feeding roller, lay pressure roller, warm-air pipe and lay mould, the defect detecting device includes infrared heat source, thermal infrared imager and image processing system, the charging tray is provided with prepreg tape, the prepreg tape successively with feeding roller, lay pressure roller and lay mould drive connection, the infrared heat source is arranged on the top of the lay mould, the thermal infrared imager is arranged on the top of the lay mould, the thermal infrared imager is connected with described image processing system；The present invention can realize quick and precisely detecting lay defect, and higher to the resolution that typical case lays defect and can realize flaw size quantitative analysis.
Description
Technical field
The invention belongs to composite automatic forming field, and in particular to a kind of automatic placement based on infrared imaging lacks
It is trapped in line device for dynamically detecting and method.
Background technology
Composite automatic placement is according to special fiber topology by the anisotropy viscoelastic prepreg with certain rigidity
It is required that, under the outer field actions such as heat, power bonding be integrated and be attached to die surface, the system so as to form composite material prefabricated component
Make process, there is efficient, high-quality, high reliability, stock utilization high, low cost, be particularly suitable for large scale and
The manufacture of complex component, reduces the number of assembled part, has saved manufacture and assembly cost, and significantly reduce component
Percent defective and manufacturing man-hours.
But, for large complicated composite material prefabricated component, heat, couple of force are subject to fibre resin in heat-affected zone is laid
Cooperation is used, and causes to lay the visco-plasticity behavior that interlayer occurs complexity, produces unpredictalbe fold to distort between easily causing laying
Etc. defect, so as to cause the reduction of spreading.In order to meet the forming requirements of large complicated load-carrying member, except integrally curing
Outside Non-Destructive Testing after shaping, there is a need to the dynamic on-line monitoring for realizing laying defect.
The lay defect of common influence composite property include hole, be mingled with, overlap, gap and interlaminar delamination and
Fiber is built bridge.Wherein, the gap in laid course is mainly combined image recognition come real with overlap joint by way of machine vision
Now monitor on-line.And hole, layering and fiber this kind of defect of bridge formation to be mainly the interlaminar bonding caused by lay insufficient pressure strong
The relatively low and excessive fiber tension of degree causes, and be mingled with mainly due to the impurity particle introduced in laid course and
The backing paper that is not completely exfoliated, film are caused.Because this kind of defect is present in inside prepreg tape laying, it is impossible to effectively by vision
Mode recognize and analyze, it is therefore necessary to be identified by the way of Non-Destructive Testing and detect.
It is suitable for the lossless detection method of composite material defect mainly including Ultrasonic C-Scan and X-ray detection etc. at present, its
Middle Ultrasonic C-Scan must use medium, such as water, can pollute composite plys, and the Ultrasonic C-Scan technology pair of air dielectric
Signal processing technology requirement is higher, improves the signal to noise ratio of Air Coupling ultrasonic signal；X-ray detection is then primarily adapted for use in discovery material
The defects such as the change of material thickness or density 1%-2%, but it is insensitive to lamination defect, and security requirement is higher, therefore at present
Being badly in need of one kind can quick and precisely recognize defect and detect automatic placement defect to the less demanding method of signal processing technology.
The content of the invention
The technical problems to be solved by the invention are directed to above-mentioned the deficiencies in the prior art and provide a kind of based on infrared imaging
Automatic placement defect dynamic on-line monitoring device and method, this based on infrared imaging automatic placement defect dynamic on-line monitoring
Device and method can realize quick and precisely detecting lay defect, and higher to the resolution that typical case lays defect and can realize lacking
Fall into size quantitative analysis.
To realize above-mentioned technical purpose, the technical scheme that the present invention takes is：
A kind of automatic placement defect dynamic on-line monitoring device based on infrared imaging, including laying device and defects detection dress
Put, the laying device includes charging tray, feeding roller, lays pressure roller, warm-air pipe and lay mould, and the defect detecting device includes
Infrared heat source, thermal infrared imager and image processing system, the charging tray are provided with prepreg tape, the prepreg tape successively with feeding
Roller, lay pressure roller and lay mould drive connection, the infrared heat source are arranged on the top of the lay mould, the infrared heat
The top of the lay mould is arranged on as instrument, the thermal infrared imager is connected with described image processing system.
Used as further improved technical scheme of the present invention, the infrared heat source is array infrared heat source.
Used as further improved technical scheme of the present invention, the prepreg tape is T800 carbon fibers or X850 resin prepregs
Material.
To realize above-mentioned technical purpose, another technical scheme that the present invention takes is：
A kind of automatic placement defect dynamic on-line monitoring method based on infrared imaging, including laying device and defects detection dress
Put, the laying device includes charging tray, feeding roller, lays pressure roller, warm-air pipe and lay mould, and the defect detecting device includes
Infrared heat source, thermal infrared imager and image processing system, the charging tray are provided with prepreg tape, specifically include following steps：
Step 1：Feeding roller pulls out prepreg tape from charging tray, and warm-air pipe is heated to prepreg tape, lays pressure roller along lay
Die surface track set in advance carries out pressurization lay to the prepreg tape after heating, and the prepreg tape of lay is fitted with mould is laid
Together so as to form prepreg tape laying；
Step 2：Infrared heat source is uniformly heated to prepreg tape laying, and thermal infrared imager is to the prepreg tape laying surface after heating
Temperature and Temperature Distribution carry out dynamic acquisition so as to obtain Infrared Thermogram, Infrared Thermogram is sent to figure by thermal infrared imager
As processing system, image processing system is identified and detects to Infrared Thermogram, so as to detect whether prepreg tape laying has
There is lay defect；
Step 3：The number of plies that is laid according to required for prepreg tape is simultaneously continuous successively by the prepreg tape on charging tray according to the method for step 1
Lay so as to form multilayer prepreg tape laying in prepreg tape laying, during successively laying, infrared heat source is according to step 2
Method the every layer of prepreg tape laying for having laid all uniformly is heated, thermal infrared imager to after heating every layer of prepreg tape spread
The temperature and Temperature Distribution of layer surface carry out dynamic acquisition so as to obtain multiple Infrared Thermograms, and thermal infrared imager is infrared by multiple
Thermography is sent to image processing system, and image processing system is identified and detects so as to detect to multiple Infrared Thermograms
Whether the every layer of prepreg tape laying for laying has lays defect.
Used as further improved technical scheme of the present invention, the infrared heat source is array infrared heat source.
Used as further improved technical scheme of the present invention, the prepreg tape is T800 carbon fibers or X850 resin prepregs
Material.
Used as further improved technical scheme of the present invention, the infrared heat source is 100mm, institute with the distance for laying mould
It is 100mm that red heat imager is stated with the distance of infrared heat source.
Used as further improved technical scheme of the present invention, the depositing speeds of the laying device are 10m/min；
Used as further improved technical scheme of the present invention, the lay defect includes porosity defects, lamination defect, inclusion defect
With fiber bridge formation defect.
The present invention uses the infrared thermal imaging detection technique based on thermo parameters method principle, using detected prepreg tape laying
Influence of the discontinuity defect to heat-conductive characteristic, and then be reflected in the difference of prepreg tape laying surface temperature, the present invention
Realize laying the dynamic on-line monitoring of defect using active infra-red thermal imaging mode, infrared heat source is realized by the way of array
The uniform quick heating of prepreg, after the temperature change on the surface of thermal infrared imager monitoring prepreg tape laying and distribution, knot
Image processing system is closed to realize processing image so as to recognize the positions and dimensions of defect, it is final to realize that typical lay lacks
The dynamic on-line monitoring during automatic placement molding is trapped in, to improve the laying forming quality of large complicated composite element
Efficient detection method is provided.
The present invention realizes laying defect by infrared heat source and thermal infrared imager using active infrared thermal imaging mode
The advantage of dynamic on-line monitoring be characterized in particular in：（1）Automatic placement defect dynamic on-line monitoring mode based on infrared imaging has
Have noncontact, can large-area scanning, quick response the features such as, be capable of achieving to lay the quick measurement of defect and accurate detection, and right
Signal processing technology is less demanding；（2）By the way of the array of infrared heat source, realize that tested the uniform of prepreg tape that lay adds
Heat, is favorably improved the resolution of defect and the accuracy of quantitative analysis of flaw size；（3）By integrated with laying device,
The on-line checking of the defect being capable of achieving during large complicated load composite element automatic placement molding, is favorably improved paving
The raising of component quality is put, so as to save the time of doing over again and improve the performance for laying component.
Brief description of the drawings
Fig. 1 is structural representation of the invention.
Fig. 2 is flow chart of the invention.
Specific embodiment
Specific embodiment of the invention is further illustrated below according to Fig. 1 and Fig. 2：
Referring to Fig. 1, a kind of automatic placement defect dynamic on-line monitoring device based on infrared imaging, including laying device and defect
Detection means, the laying device includes charging tray 1, feeding roller 3, lays pressure roller 5, warm-air pipe 4 and lays mould 10, the defect
Detection means includes infrared heat source 7, thermal infrared imager 8 and image processing system 9, and the charging tray 1 is provided with prepreg tape 2, described
Prepreg tape 2 is connected with feeding roller 3, lay pressure roller 5 and lay mould 10 successively, and the infrared heat source 7 is arranged on the paving
The top of mould 10 is put, the thermal infrared imager 8 is arranged on the top of the lay mould 10, the thermal infrared imager 8 and institute
Image processing system 9 is stated to connect.
In embodiment, the infrared heat source 7 is array infrared heat source 7.
In embodiment, the prepreg tape 2 is T800 carbon fibers or X850 resin prepreg materials.
The present embodiment is continuously laid along the surface of mould 10 is placed by laying pressure roller 5 according to default track,
The position for laying the certain distance of pressure roller 5 at interval is provided with the infrared heat source 7 of array, for being detected the equal of prepreg tape 2
Even heating, so that using the difference of the hot property between defect and matrix material, temperature point is formed on the surface of prepreg tape laying 6
The power and distribution of the distance between cloth, wherein infrared heat source 7 and tested prepreg tape laying 6 depending on infrared heat source 7.In reality
Show on the basis of the uniform dynamic heat to prepreg tape laying 6, setting thermal infrared imager 8 carries out surface temperature to it and its divide
The dynamic acquisition of cloth, frequency acquisition and temperature accuracy are depending on the parameter of itself of thermal infrared imager 8；The Infrared Thermogram knot of collection
Close image processing system 9, the Temperature Distribution that image processing system 9 shows according to Infrared Thermogram realizes typical defect, such as hole,
The quick identification of defect such as it is layered, is mingled with, while carrying out quantitative analysis to the size of defect, finally realizes complex large-scale component
The online dynamic quick detection of defect during automatic placement molding.
The present embodiment also proposes a kind of automatic placement defect dynamic on-line monitoring method based on infrared imaging, including lays
Device and defect detecting device, the laying device include charging tray 1, feeding roller 3, lay pressure roller 5, warm-air pipe 4 and lay mould
10, the defect detecting device includes infrared heat source 7, thermal infrared imager 8 and image processing system 9, and the charging tray 1 is provided with pre-
Leaching band 2, referring to Fig. 2, specifically includes following steps：
（1）Feeding roller 3 pulls out prepreg tape 2 from charging tray 1, and the prepreg tape 2 that warm-air pipe 4 pairs is pulled out is heated, and lays pressure
Roller 5 carries out pressurization lay along the surface of mould 10 track set in advance is laid to the prepreg tape 2 after heating, in warm-air pipe 4 pairs
Prepreg tape 2 is fitted in mould 10 is laid in the presence of pressurization of the heating and lay pressure roller 5 of prepreg tape 2 to prepreg tape 2 lays
Together so as to form the prepreg tape laying 6 of ground floor；
（2）Infrared heat source 7 is uniformly heated to the prepreg tape laying 6 of ground floor, the ground floor after 8 pairs of heating of thermal infrared imager
The surface of prepreg tape laying 6 temperature and Temperature Distribution carry out dynamic acquisition so as to obtain Infrared Thermogram, thermal infrared imager 8 will
Infrared Thermogram is sent to image processing system 9, and image processing system 9 is identified and detects to Infrared Thermogram, so as to examine
Whether the prepreg tape laying 6 for measuring ground floor has lay defect；
（3）Feeding roller 3 pulls out prepreg tape 2 from charging tray 1, and the prepreg tape 2 that warm-air pipe 4 pairs is pulled out is heated, and lays pressure
Roller 5 along lay the surface of mould 10 track set in advance above the prepreg tape laying 6 of ground floor to heating after preimpregnation
Band 2 carries out pressurization lay, the effect that the pressurization in warm-air pipe 4 to the heating of prepreg tape 2 and lay pressure roller 5 to prepreg tape 2 lays
Lower prepreg tape 2 fits together so as to form the prepreg tape laying 6 of the second layer with the prepreg tape laying 6 of ground floor；
（4）Infrared heat source 7 is uniformly heated to the prepreg tape laying 6 of the second layer, the second layer after 8 pairs of heating of thermal infrared imager
The surface of prepreg tape laying 6 temperature and Temperature Distribution carry out dynamic acquisition so as to obtain Infrared Thermogram, thermal infrared imager 8 will
Infrared Thermogram is sent to image processing system 9, and image processing system 9 is identified and detects to Infrared Thermogram, so as to examine
Whether the prepreg tape laying 6 for measuring the second layer has lay defect；
（5）The number of plies laid required for the finished product member that the present embodiment is formed after laying is N, similarly step（3）And step（4）,
According to required for prepreg tape 2 lay number of plies N and according to step（3）Method the prepreg tape 2 on charging tray 1 is continuously successively laid
So as to form N-2 layers of prepreg tape laying 6 on to the prepreg tape laying 6 of the second layer, during successively laying, infrared heat source 7
According to step（4）The method every layer of prepreg tape laying 6 for having laid each to laying device uniformly heated successively, infrared heat
As the temperature and Temperature Distribution on every layer of surface of prepreg tape laying 6 after the heating of 8 pairs, instrument, to carry out dynamic acquisition red so as to obtain N-2
N-2 Infrared Thermogram is sent to image processing system 9 by outer thermography, thermal infrared imager 8, and image processing system 9 is to N-2
Infrared Thermogram is identified and detects to lay defect so as to detect whether every layer of prepreg tape laying 6 of lay has；
（6）Similarly according to step（3）And step（4）Method, image processing system 9 to the present embodiment lay after formed finished product
All N layers of prepreg tape laying 6 included in component carry out lay defects detection successively, terminate after the completion of detection.
In embodiment, the infrared heat source 7 is array infrared heat source.
In embodiment, the prepreg tape 2 is T800 carbon fibers or X850 resin prepreg materials.
In embodiment, the infrared heat source 7 with lay mould 10 distance be 100mm, the red heat imager with it is infrared
The distance of thermal source 7 is 100mm, and the heating power supply power of infrared heat source 7 is 1000W.
In embodiment, the depositing speeds of the laying device are 10m/min；
In embodiment, the lay defect includes porosity defects, lamination defect, inclusion defect and fiber bridge formation defect.
The present invention is realized laying and lacked by infrared heat source 7 and thermal infrared imager 8 using active infrared thermal imaging mode
The advantage of sunken dynamic on-line monitoring is characterized in particular in：Automatic placement defect dynamic on-line monitoring mode based on infrared imaging has
Noncontact, can large-area scanning, quick response the features such as, be capable of achieving to lay the quick measurement of defect and accurate detection, and to letter
Number treatment technology is less demanding；By the way of the array of infrared heat source 7, the tested uniform heating for laying prepreg tape 2 is realized, had
Help improve the resolution of defect and the accuracy of quantitative analysis of flaw size；By integrated with laying device, it is capable of achieving big
The on-line checking of the defect during type complexity load composite element automatic placement molding, is favorably improved lay component matter
The raising of amount, so as to save the time of doing over again and improve the performance for laying component.
Protection scope of the present invention includes but is not limited to embodiment of above, and protection scope of the present invention is with claims
Be defined, any replacement being readily apparent that to those skilled in the art that this technology is made, deformation, improvement each fall within it is of the invention
Protection domain.
Claims (9)
1. a kind of automatic placement defect dynamic on-line monitoring device based on infrared imaging, it is characterised in that：Including laying device
And defect detecting device, the laying device is including charging tray, feeding roller, lay pressure roller, warm-air pipe and lays mould, the defect
Detection means includes infrared heat source, thermal infrared imager and image processing system, and the charging tray is provided with prepreg tape, the prepreg tape
Successively with feeding roller, lay pressure roller and lay mould drive connection, the infrared heat source is arranged on the top of the lay mould,
The thermal infrared imager is arranged on the top of the lay mould, and the thermal infrared imager is connected with described image processing system.
2. the automatic placement defect dynamic on-line monitoring device based on infrared imaging according to claim 1, its feature exists
In：The infrared heat source is array infrared heat source.
3. the automatic placement defect dynamic on-line monitoring device based on infrared imaging according to claim 2, its feature exists
In：The prepreg tape is T800 carbon fibers or X850 resin prepreg materials.
4. a kind of automatic placement defect dynamic on-line monitoring method based on infrared imaging, it is characterised in that：Including laying device
And defect detecting device, the laying device is including charging tray, feeding roller, lay pressure roller, warm-air pipe and lays mould, the defect
Detection means includes infrared heat source, thermal infrared imager and image processing system, and the charging tray is provided with prepreg tape, specifically include with
Lower step：
Step 1：Feeding roller pulls out prepreg tape from charging tray, and warm-air pipe is heated to prepreg tape, lays pressure roller along lay
Die surface track set in advance carries out pressurization lay to the prepreg tape after heating, and the prepreg tape of lay is fitted with mould is laid
Together so as to form prepreg tape laying；
Step 2：Infrared heat source is uniformly heated to prepreg tape laying, and thermal infrared imager is to the prepreg tape laying surface after heating
Temperature and Temperature Distribution carry out dynamic acquisition so as to obtain Infrared Thermogram, Infrared Thermogram is sent to figure by thermal infrared imager
As processing system, image processing system is identified and detects to Infrared Thermogram, so as to detect whether prepreg tape laying has
There is lay defect；
Step 3：The number of plies that is laid according to required for prepreg tape is simultaneously continuous successively by the prepreg tape on charging tray according to the method for step 1
Lay so as to form multilayer prepreg tape laying in prepreg tape laying, during successively laying, infrared heat source is according to step 2
Method the every layer of prepreg tape laying for having laid all uniformly is heated, thermal infrared imager to after heating every layer of prepreg tape spread
The temperature and Temperature Distribution of layer surface carry out dynamic acquisition so as to obtain multiple Infrared Thermograms, and thermal infrared imager is infrared by multiple
Thermography is sent to image processing system, and image processing system is identified and detects so as to detect to multiple Infrared Thermograms
Whether the every layer of prepreg tape laying for laying has lays defect.
5. the automatic placement defect dynamic on-line monitoring method based on infrared imaging according to claim 4, its feature exists
In：The infrared heat source is array infrared heat source.
6. the automatic placement defect dynamic on-line monitoring method based on infrared imaging according to claim 5, its feature exists
In：The prepreg tape is T800 carbon fibers or X850 resin prepreg materials.
7. the automatic placement defect dynamic on-line monitoring method based on infrared imaging according to claim 6, its feature exists
In：The infrared heat source is 100mm with the distance for laying mould, and the red heat imager is 100mm with the distance of infrared heat source.
8. the automatic placement defect dynamic on-line monitoring method based on infrared imaging according to claim 7, its feature exists
In：The depositing speeds of the laying device are 10m/min.
9. the automatic placement defect dynamic on-line monitoring method based on infrared imaging according to claim 4, its feature exists
In：The lay defect includes porosity defects, lamination defect, inclusion defect and fiber bridge formation defect.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710085411.9A CN106872521A (en) | 2017-02-17 | 2017-02-17 | Automatic placement defect dynamic on-line monitoring device and method based on infrared imaging |
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| CN201710085411.9A CN106872521A (en) | 2017-02-17 | 2017-02-17 | Automatic placement defect dynamic on-line monitoring device and method based on infrared imaging |
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| CN201710085411.9A Pending CN106872521A (en) | 2017-02-17 | 2017-02-17 | Automatic placement defect dynamic on-line monitoring device and method based on infrared imaging |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107599446A (en) * | 2017-09-30 | 2018-01-19 | 威海拓展纤维有限公司 | Carbon fiber prepreg laying device |
| CN108680292A (en) * | 2018-07-18 | 2018-10-19 | 广州大学 | The production method and device of optical-fiber intelligent carbon fiber sensing zone |
| CN109049754A (en) * | 2018-08-20 | 2018-12-21 | 江苏大学 | A kind of double light source temperature auxiliary carbon fiber prepreg laying device and methods of laser |
| CN109571932A (en) * | 2018-11-14 | 2019-04-05 | 中国科学院福建物质结构研究所 | A kind of device preparing continuous fiber reinforced composites component |
| CN111579591A (en) * | 2020-03-31 | 2020-08-25 | 天津智惠未来科技有限责任公司 | Infrared nondestructive testing method and system for wind power blade |
| CN111649040A (en) * | 2019-03-04 | 2020-09-11 | 波音公司 | Thermal imagery inspection of tape layup machine |
| CN112102310A (en) * | 2020-09-27 | 2020-12-18 | 江苏恒宝智能***技术有限公司 | Method and system for detecting laying defects of prepreg filaments of composite material |
| CN112881467A (en) * | 2021-03-15 | 2021-06-01 | 中国空气动力研究与发展中心超高速空气动力研究所 | Large-size composite material damage imaging and quantitative identification method |
| CN113670747A (en) * | 2021-08-19 | 2021-11-19 | 北京航空航天大学 | Device and method for evaluating fatigue performance of prepreg tape |
| CN115476555A (en) * | 2022-10-10 | 2022-12-16 | 北京机科国创轻量化科学研究院有限公司 | Layer-detection function integrated intelligent device of fiber metal laminate |
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107599446A (en) * | 2017-09-30 | 2018-01-19 | 威海拓展纤维有限公司 | Carbon fiber prepreg laying device |
| CN108680292A (en) * | 2018-07-18 | 2018-10-19 | 广州大学 | The production method and device of optical-fiber intelligent carbon fiber sensing zone |
| CN109049754A (en) * | 2018-08-20 | 2018-12-21 | 江苏大学 | A kind of double light source temperature auxiliary carbon fiber prepreg laying device and methods of laser |
| CN109571932A (en) * | 2018-11-14 | 2019-04-05 | 中国科学院福建物质结构研究所 | A kind of device preparing continuous fiber reinforced composites component |
| CN111649040B (en) * | 2019-03-04 | 2024-04-12 | 波音公司 | Thermal image inspection of tape lay-up machine |
| CN111649040A (en) * | 2019-03-04 | 2020-09-11 | 波音公司 | Thermal imagery inspection of tape layup machine |
| CN111579591A (en) * | 2020-03-31 | 2020-08-25 | 天津智惠未来科技有限责任公司 | Infrared nondestructive testing method and system for wind power blade |
| CN112102310A (en) * | 2020-09-27 | 2020-12-18 | 江苏恒宝智能***技术有限公司 | Method and system for detecting laying defects of prepreg filaments of composite material |
| CN112102310B (en) * | 2020-09-27 | 2023-12-12 | 江苏恒宝智能***技术有限公司 | Method and system for detecting laying defects of prepreg filaments of composite material |
| CN112881467A (en) * | 2021-03-15 | 2021-06-01 | 中国空气动力研究与发展中心超高速空气动力研究所 | Large-size composite material damage imaging and quantitative identification method |
| CN113670747A (en) * | 2021-08-19 | 2021-11-19 | 北京航空航天大学 | Device and method for evaluating fatigue performance of prepreg tape |
| CN113670747B (en) * | 2021-08-19 | 2022-05-24 | 北京航空航天大学 | Device and method for evaluating fatigue performance of prepreg tape |
| CN115476555A (en) * | 2022-10-10 | 2022-12-16 | 北京机科国创轻量化科学研究院有限公司 | Layer-detection function integrated intelligent device of fiber metal laminate |
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