CN221631275U - Device for detecting defects of fiber material prepreg - Google Patents
Device for detecting defects of fiber material prepreg Download PDFInfo
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- CN221631275U CN221631275U CN202322593566.7U CN202322593566U CN221631275U CN 221631275 U CN221631275 U CN 221631275U CN 202322593566 U CN202322593566 U CN 202322593566U CN 221631275 U CN221631275 U CN 221631275U
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- tool main
- intensity sensor
- light intensity
- light source
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- 230000007547 defect Effects 0.000 title claims abstract description 32
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- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
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Landscapes
- Investigating Materials By The Use Of Optical Means Adapted For Particular Applications (AREA)
- Treatment Of Fiber Materials (AREA)
Abstract
The utility model provides a fiber material prepreg defect detection device which comprises a tool main body, a point light source and a photosensitive light intensity sensor, wherein the tool main body is provided with a light source; the inner walls of the tool main body are black; the photosensitive light intensity sensor is arranged at the bottom end of the inside of the tool main body, the point light source is positioned in the tool main body, and the fiber material prepreg to be measured is arranged between the photosensitive light intensity sensor and the point light source. The point light source is used for emitting light, and the photosensitive light intensity sensor is used for receiving the light. The utility model uses the photosensitive light intensity sensor to replace manual work, has unified standard, and avoids the phenomenon of judgment error caused by long working time when manual judgment is performed. Besides, the utility model utilizes the design of the tool main body with the point light sources arranged on the inner wall in black, so that the influence of external light and reflected light in the tool main body on the photosensitive light intensity sensor is greatly reduced, and the accuracy of the photosensitive light intensity sensor is improved.
Description
Technical Field
The utility model relates to the field of advanced composite material detection, in particular to a fiber material prepreg defect detection device.
Background
The fiber reinforced thermoplastic/thermosetting polymer matrix composite material has the advantages of light weight, high specific strength, high specific modulus, corrosion resistance, fatigue resistance, impact resistance, strong designability and the like, so that the fiber reinforced thermoplastic/thermosetting polymer matrix composite material is widely focused in the fields of aviation, high-speed rail, light-weight fuel-saving automobiles, new energy automobiles and other emerging high-end traffic equipment. The use level of thermoplastic/thermosetting composite materials is gradually increased along with the development of the times; it is counted that 70% of the cost of the aviation composite components is derived from manufacturing, and reducing the manufacturing cost is a key to breaking through the development bottleneck of the composite.
Typical unidirectional thermoplastic/thermoset composite prepregs are formed into unidirectional fabrics by drawing unidirectional tapes of yarns into a spreader device and then expanding the unidirectional tapes of yarns into unidirectional fabrics. And then uniformly entering a gum dipping tank by the unidirectional cloth, uniformly dipping the resin particles in the suspension liquid or melted resin particles into the unidirectional cloth, and finally enabling the resin particles to adsorb and load on the surface of the fiber unidirectional cloth. The unidirectional fiber cloth then passes through a pultrusion die, and thermoplastic/thermosetting resin particles in a molten state are infiltrated into the fibers under the action of external force through a certain temperature and pressure in the pultrusion die. And then the thermoplastic/thermosetting prepreg is subjected to an electric heating press roller to enable the prepreg in the original shape to be flat, so that the prepreg is convenient to roll in the next rolling process. And finally, the traction device and the winding machine finish winding the prepreg, so that the convenience of transportation and storage of the product is realized. And cleaning the gum dipping tank by using acetone after completion. Thermoplastic/thermoset fabric prepregs are manufactured by spreading out a fabric form impregnation similar to unidirectional thermoplastic/thermoset composite prepregs.
Because unidirectional thermoplastic/thermoset composite prepregs and thermoplastic/thermoset fabric prepreg manufacturing processes are subject to multiple steps of drafting and lack of an efficient bundling and gathering process, thermoplastic/thermoset composite prepregs are often prone to yarn spreading defects, typically manifested as gaps between finished prepreg yarn bundles, and macroscopic transparency.
The current main defect identification mode is qualitative judgment for human eyes, and quantitative characterization cannot be realized. However, the judgment by the naked eyes is completely dependent on the manual experience, the standards of each person are difficult to unify, and the phenomenon that the judgment errors are caused by eye fatigue due to long working time exists.
Disclosure of utility model
In view of the defects in the prior art, the utility model aims to provide a fiber material prepreg defect detection device.
The utility model provides a fiber material prepreg defect detection device, which comprises a tool main body, a point light source and a photosensitive light intensity sensor, wherein the tool main body is provided with a light source;
The inner walls of the tool main body are black;
The photosensitive light intensity sensor is arranged at the bottom end of the inside of the tool main body, the point light source is positioned in the tool main body, and the fiber material prepreg to be measured is arranged between the photosensitive light intensity sensor and the point light source.
The point light source is used for emitting light, and the photosensitive light intensity sensor is used for receiving the light.
Preferably, the system further comprises a signal wire and a host; the host is electrically connected with the photosensitive light intensity sensor through a signal wire.
Preferably, the tool main body is of a hexahedral structure; hooks are arranged on the front, back, left and right sides of the hexahedron; the hook is positioned between the point light source and the photosensitive light intensity sensor, and the fiber material prepreg to be tested is installed in the tool main body through the hook.
Preferably, a light-transmitting support frame is arranged in the tool main body, and the light-transmitting support frame is positioned between the point light source and the photosensitive light intensity sensor and is arranged in parallel with the bottom surface of the tool main body; the fiber material prepreg is arranged in the tool main body through the light-transmitting support frame.
Preferably, caulking pieces are arranged between the periphery of the fiber material prepreg to be tested and the front, back, left and right walls of the tool main body so as to prevent light rays emitted by the point light sources from directly entering the photosensitive light intensity sensor through gaps between the fiber material prepreg to be tested and the tool main body.
Preferably, the caulking member is a black tape.
Preferably, the point light source includes an LED lamp, a focal point, an optical fiber, or a single-mode laser diode.
Compared with the prior art, the utility model has the following beneficial effects:
The utility model uses the photosensitive light intensity sensor to replace manual work, has unified standard, and avoids the phenomenon of judgment error caused by long working time when manual judgment is performed. Besides, the utility model utilizes the design of the tool main body with the point light sources arranged on the inner wall in black, so that the influence of external light and reflected light in the tool main body on the photosensitive light intensity sensor is greatly reduced, and the accuracy of the photosensitive light intensity sensor is improved.
Drawings
Other features, objects and advantages of the present utility model will become more apparent upon reading of the detailed description of non-limiting embodiments, given with reference to the accompanying drawings in which:
FIG. 1 is a schematic diagram of the structure of the present utility model;
The figure shows:
Detailed Description
The present utility model will be described in detail with reference to specific examples. The following examples will assist those skilled in the art in further understanding the present utility model, but are not intended to limit the utility model in any way. It should be noted that variations and modifications could be made by those skilled in the art without departing from the inventive concept. These are all within the scope of the present utility model.
Example 1: example 1 as base example:
The utility model provides a fiber material prepreg defect detection device which comprises a tool main body 1, a point light source 3 and a photosensitive light intensity sensor 4, wherein the tool main body is provided with a light source; the inner walls of the tool main body 1 are black, and in a preferred example, the tool main body 1 has a hexahedral structure; in another preferred embodiment, the tool main body 1 is a cassette; the tool main body cassette is welded by aluminum profiles and steel materials and forms a sealing structure, the black background of the cassette in the main body is a space cold-black environment, and a black coating is obtained by spraying after compounding and is used for absorbing the radiation of the point light source to the periphery, so that the directional radiation of the point light source to the thermoplastic/thermosetting prepreg is realized; the total leakage rate of the cassette is less than 1 multiplied by 10 < -5 > Pa.m 3/s; the absorbance of the coating is greater than 90%.
The point light source 3 comprises a typical point light source such as an LED lamp, a focal point, an optical fiber or a single-mode laser diode, and the like, and mainly provides a light source irradiation basis for the interior of the cassette. Preferably, the point light source 3 is a single mode laser diode point light source.
The photosensitive light intensity sensor 4 is arranged at the bottom end inside the tool main body 1, the point light source 3 is positioned in the tool main body 1, and the fiber material prepreg to be measured is arranged between the photosensitive light intensity sensor 4 and the point light source 3. The point light source 3 is used for emitting light, and the photosensitive light intensity sensor 4 is used for receiving the light.
The device for detecting the defects of the fiber material prepreg further comprises a signal wire 2 and a host 5; the host 5 is electrically connected with the photosensitive light intensity sensor 4 through a signal line 2. The signal line 2 is an optical signal or electric signal transmission medium and is mainly used for transmitting detection signals of the photosensitive light intensity sensor.
In a preferred embodiment, hooks are arranged on the front, back, left and right sides of the cassette or hexahedron; the hook is located between the point light source 3 and the photosensitive light intensity sensor 4, the fiber material prepreg to be tested is installed in the tool main body 1 through the hook, and after being hung, the fiber material prepreg is transversely paved between the point light source 3 and the photosensitive light intensity sensor 4 in the tool main body 1. In another preferred embodiment, a light-transmitting support frame is arranged in the tool main body 1, and the light-transmitting support frame is positioned between the point light source 3 and the photosensitive light intensity sensor 4 and is arranged parallel to the bottom surface of the tool main body 1; the fiber material prepreg is placed in the tool main body 1 through the light-transmitting support frame.
And caulking pieces are arranged between the periphery of the fiber material prepreg to be tested and the front, back, left and right walls of the tooling main body 1 so as to prevent light rays emitted by the point light sources 3 from directly entering the photosensitive light intensity sensor 4 through gaps between the fiber material prepreg to be tested and the tooling main body 1. Preferably, the caulking member is a black tape.
The fiber material prepreg to be measured can be PPS thermoplastic/thermosetting composite material prepreg, and also can be thermosetting or thermoplastic prepreg prepared by carbon fiber, aramid fiber and other fibers.
In summary, the utility model replaces manual work with the photosensitive light intensity sensor, has unified standard, and avoids the phenomenon of judgment error caused by long working time when manual judgment is performed. Besides, the utility model utilizes the design of the tool main body 1 with the point light sources 3 arranged on the inner wall in black, so that the influence of external light and reflected light in the tool main body 1 on the photosensitive light intensity sensor 4 is greatly reduced, and the accuracy of the photosensitive light intensity sensor is improved.
The working principle of example 1 is as follows:
After the light source irradiates the thermoplastic/thermosetting composite material prepreg sheet with a certain thickness, the light intensity of the light source is attenuated; the light source is received by the photosensitive light intensity sensor after attenuation and reflects light intensity data to the host, and when the light intensity is higher than a threshold value set by the photosensitive light intensity sensor, an operator can judge that the gap of the prepreg yarn is too large, and the quality of the prepreg is unqualified.
Example 2: example 2 is a variation of example 1:
The host computer 5 is internally provided with a data processing system and software, and the data processing system and the software analyze the optical signals or the electrical signals extracted by the optical intensity analysis system to obtain the optical intensity of the light source after passing through the thermoplastic/thermosetting composite material prepreg so as to calculate and quantitatively represent the yarn spreading defect of the thermoplastic/thermosetting composite material prepreg.
The photosensitive light intensity sensor is an optical receiving device such as a photosensitive sensor, and is used for directly transmitting optical signals or converting the optical signals into electric signals for signal amplification and output.
Specifically, the data processing system calculates absorbance t=i (test light intensity)/I0 (original light intensity) based on beer's law, and adopts PPS thermoplastic/thermosetting composite prepreg with extremely low defects to test the material absorbance T standard as a standard, and calculates defect rate f=1- (T/T standard); then, a fitting function of the output current signal and the defect rate is established, and a Python program is written based on the function to realize quantitative calculation of the defect rate.
The working principle of this embodiment is as follows:
After the light source irradiates the thermoplastic/thermosetting composite material prepreg sheet with a certain thickness, the light intensity of the light source is attenuated; the attenuated light source transmits signals to a data processing system and software thereof after being detected by a sensor, and the defects of the thermoplastic/thermosetting composite material prepreg yarn spreading are quantitatively characterized after data analysis, so that visual qualitative analysis to quantitative detection analysis from naked eyes are realized.
Aiming at the defects in the prior art, the embodiment has the advantages of realizing the rapid detection of the defects of the thermoplastic/thermosetting composite material prepreg and realizing the yarn spreading defects which cannot be detected by the prior equipment; the thermoplastic/thermosetting composite prepreg raw material has the advantages of quantitative identification and detection of visual defects. The embodiment can rapidly and accurately obtain the defects of yarn spreading defects of thermoplastic/thermosetting composite material prepregs with different specifications, and the like, and overcomes inaccuracy and inaccuracy of only manual qualitative judgment in the current related technology. The embodiment can provide data support and theoretical prediction basis for the development, manufacture and use process of thermoplastic/thermosetting composite prepreg. The method and the device can quantitatively identify and detect the visual defects of the fiber material prepreg raw material. Namely, the embodiment can realize the quantitative analysis of the defects of the thermoplastic/thermosetting composite material prepreg and the low-cost digital analysis.
In summary, the technical features of the tool main body 1, the point light source 3, the photosensitive light intensity sensor 4, the data processing system and the software thereof are mutually associated and cooperate, so that the quantitative analysis effect which is not possessed by the existing method and equipment is achieved, the defects of yarn spreading defects of thermoplastic/thermosetting composite material prepregs with different specifications and the like can be rapidly and accurately obtained, and the inaccuracy and inaccuracy of only manual qualitative judgment in the current related technology are overcome; the method provides data support and theoretical prediction basis for the development, the manufacture and the use process of thermoplastic/thermosetting composite material prepregs.
In the description of the present application, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present application.
The foregoing describes specific embodiments of the present utility model. It is to be understood that the utility model is not limited to the particular embodiments described above, and that various changes or modifications may be made by those skilled in the art within the scope of the appended claims without affecting the spirit of the utility model. The embodiments of the utility model and the features of the embodiments may be combined with each other arbitrarily without conflict.
Claims (5)
1. The device for detecting the defects of the fiber material prepreg is characterized by comprising a tool main body (1), a point light source (3) and a photosensitive light intensity sensor (4);
the inner walls of the tool main body (1) are black;
The photosensitive light intensity sensor (4) is arranged at the bottom end of the inside of the tool main body (1), the point light source (3) is positioned in the tool main body (1), and the fiber material prepreg to be tested is arranged between the photosensitive light intensity sensor (4) and the point light source (3);
The point light source (3) is used for emitting light, and the photosensitive light intensity sensor (4) is used for receiving the light;
The tool main body (1) is of a hexahedral structure; hooks are arranged on the front, back, left and right sides of the hexahedron; the hook is positioned between the point light source (3) and the photosensitive light intensity sensor (4), and the fiber material prepreg to be tested is arranged in the tool main body (1) through the hook;
A light-transmitting support frame is arranged in the tool main body (1), is positioned between the point light source (3) and the photosensitive light intensity sensor (4), and is arranged in parallel with the bottom surface of the tool main body (1); the fiber material prepreg is arranged in the tool main body (1) through a light-transmitting support frame.
2. The fiber material prepreg defect detection apparatus according to claim 1, further comprising a signal line (2) and a host (5); the host (5) is electrically connected with the photosensitive light intensity sensor (4) through a signal line (2).
3. The fiber material prepreg defect detection device according to claim 1, wherein a caulking member is arranged between the periphery of the fiber material prepreg to be detected and the front, rear, left and right walls of the tooling main body (1) so as to prevent light rays emitted by the point light source (3) from directly entering the photosensitive light intensity sensor (4) through a gap between the fiber material prepreg to be detected and the tooling main body (1).
4. A fibrous material prepreg defect inspection apparatus according to claim 3 wherein the caulking member is black tape.
5. The fiber material prepreg defect detection apparatus according to claim 1, wherein the point light source (3) comprises an LED lamp, a focal point, an optical fiber, or a single-mode laser diode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322593566.7U CN221631275U (en) | 2023-09-22 | 2023-09-22 | Device for detecting defects of fiber material prepreg |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322593566.7U CN221631275U (en) | 2023-09-22 | 2023-09-22 | Device for detecting defects of fiber material prepreg |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN221631275U true CN221631275U (en) | 2024-08-30 |
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ID=92495460
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322593566.7U Active CN221631275U (en) | 2023-09-22 | 2023-09-22 | Device for detecting defects of fiber material prepreg |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN221631275U (en) |
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2023
- 2023-09-22 CN CN202322593566.7U patent/CN221631275U/en active Active
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