Carbon fiber hardness detection device

Abstract

The utility model discloses a carbon fiber hardness detection device which is characterized in that a first carrying table, a measuring part and a second carrying table are sequentially arranged from upstream to downstream according to the motion direction of cut carbon fibers to be detected, a cutting part is arranged on the first carrying table, and a fixing part is arranged on the second carrying table; after the to-be-detected carbon fiber is cut and moves to the position where the cutting end of the to-be-detected carbon fiber coincides with the end face, close to one side of the second carrying table, of the first carrying table, the fixing part is used for fixing and pressing the to-be-detected carbon fiber located on the second carrying table, and the upper surfaces of the first carrying table and the second carrying table are located on the same horizontal line; the upper surface of the measuring part is lower than the upper surface of the first carrying table; the measuring part is used for measuring the distance between the projection of the cut end of the to-be-detected carbon fiber on the horizontal plane and the end face, close to one side of the first carrying table, of the second carrying table after the cut to-be-detected carbon fiber is suspended for a preset time. Therefore, automatic cutting of the carbon fiber is realized, manual intervention is reduced, and the accuracy of a measurement result is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of carbon fiber property detection, in particular to a carbon fiber hardness detection device. Background Art

[0002] Carbon fiber has a series of advantages such as light weight, high strength, high modulus, high temperature resistance and corrosion resistance. The composite materials prepared using it as a reinforcing material are widely used in various industries.

[0003] Fiber stiffness refers to its bending rigidity and softness. Conventional fiber stiffness measurement and sampling methods have numerous shortcomings. Traditional sampling methods often rely on manual labor, such as two people collaborating to secure the ends of a carbon fiber to a steel ruler and then using scissors or a blade to cut the sample to the desired length. This method is not only inefficient and time-consuming, but also susceptible to human factors, such as operator proficiency and visual judgment errors, which can affect the sampling results and lead to significant deviations in measurement accuracy. Utility Model Content

[0004] In order to solve the above technical problems, the utility model provides a carbon fiber hardness detection device.

[0005] The utility model provides a carbon fiber hardness detection device, which is provided with a first carrier, a measuring part and a second carrier in sequence from upstream to downstream according to the movement direction of the carbon fiber to be detected after cutting. The first carrier is provided with a cutting part, and the second carrier is provided with a fixing part.

[0006] The cutting unit is used to cut the carbon fiber to be tested located on the first carrier;

[0007] When the carbon fiber to be tested is cut and moved to a preset position, the fixing portion is used to fix and press the carbon fiber to be tested on the second carrier, wherein the preset position is that the cut end of the carbon fiber to be tested coincides with the end surface of the first carrier on the side close to the second carrier;

[0008] The upper surfaces of the first stage and the second stage are located on the same horizontal line, and the upper surface of the measuring portion is lower than the upper surface of the first stage;

[0009] The measuring unit is used to measure the distance between the projection of the cut end of the carbon fiber to be detected on the horizontal plane and the end surface of the second platform close to the first platform after the cut carbon fiber to be detected is suspended for a preset time.

[0010] In some embodiments of the present disclosure, a cutting groove is arranged on the first carrier, and extends in a direction perpendicular to the carbon fiber to be detected. A cutting knife is arranged in the cutting groove and used to cut the carbon fiber to be detected.

[0011] In some embodiments of the present disclosure, a counterweight part is arranged downstream of the fixing part along the movement direction of the carbon fiber to be detected.

[0012] The counterweight part comprises a first yarn guide roller and a counterweight block. The carbon fiber to be detected is wound around the first yarn guide roller after passing through the fixing part. The first end of the carbon fiber to be detected after winding around the first yarn guide roller is connected to the counterweight block.

[0013] The counterweight part is used to pull the carbon fiber to be detected after cutting until the counterweight part falls on the third carrier.

[0014] In some embodiments of the present disclosure, a first distance is arranged between the cutting groove and the end face of the first carrier close to the side of the fixing part.

[0015] A second distance is arranged between the counterweight block before movement and the third carrier.

[0016] The first distance is equal to the second distance.

[0017] In some embodiments of the present disclosure, the first distance is 5-15 cm.

[0018] In some embodiments of the present disclosure, a yarn returning part is arranged upstream of the cutting part along the movement direction of the carbon fiber to be detected, and is used to fix the second end of the carbon fiber to be detected before cutting.

[0019] In some embodiments of the present disclosure, a second yarn guide roller is arranged between the yarn returning part and the cutting part, and is arranged in parallel with the extension direction of the cutting groove.

[0020] In some embodiments of the present disclosure, the first yarn guide roller and the second yarn guide roller are arranged in parallel, and the upper surfaces of the first yarn guide roller and the second yarn guide roller are located on the same horizontal plane as the upper surface of the first carrier.

[0021] In some embodiments of the present disclosure, the fixing part comprises a fixing block.

[0022] After the carbon fiber to be detected moves to the preset position, the lower surface of the fixing block is attached to the upper surface of the second carrier to fix the carbon fiber to be detected.

[0023] The end face of the fixing block close to the side of the first carrier is located in the same plane as the end face of the second carrier close to the side of the first carrier.

[0024] In some embodiments of the present disclosure, the measuring portion includes a measuring plate and a lifting platform;

[0025] The lifting platform can be extended and retracted along the height direction of the first platform. The measuring plate is arranged at the upper end of the lifting platform. Along the width direction of the lifting platform, both ends of the lifting platform are respectively in contact with the first platform and the second platform.

[0026] The carbon fiber hardness detection device provided by the utility model has at least the following advantages:

[0027] The carbon fiber hardness detection device provided by the utility model realizes automatic cutting of carbon fiber by arranging a cutting part on the first carrier, reduces the steps of manual operation, and improves production efficiency. The cut carbon fiber can automatically move from upstream to downstream until it reaches a preset position, reduces manual intervention, and improves overall operation efficiency. The fixing part on the second carrier can fix and press the carbon fiber after it reaches the preset position, which helps to maintain the stability and position accuracy of the carbon fiber during the measurement process of the measuring part and prevent measurement errors caused by movement or vibration. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0029] Figure 1 A schematic structural diagram of a carbon fiber hardness testing device provided by an exemplary embodiment of the present invention before cutting the carbon fiber to be tested;

[0030] Figure 2 A schematic diagram of the partial structure of the carbon fiber hardness detection device provided by an exemplary embodiment of the present invention after the carbon fiber to be detected is cut.

[0031] The following are marked in the accompanying drawings:

[0032] 1. First carrier; 110. Cutting section; 111. Cutting groove; 112. Cutting knife;

[0033] 2. Second carrier; 210. Fixing portion;

[0034] 3. Measuring unit; 310. Measuring plate; 320. Lifting platform;

[0035] 4. First guide roller; 5. Counterweight; 6. Third carrier; 7. Wire withdrawal section; 8. Second guide roller; 9. Carbon fiber to be tested. DETAILED DESCRIPTION

[0036] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without inventive efforts shall fall within the scope of protection of the present invention.

[0037] References to "embodiments" herein mean that a particular feature, structure, or characteristic described in connection with the embodiments may be included in at least one embodiment of the present invention. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0038] Carbon fiber boasts a host of advantages, including light weight, high strength, high modulus, and high-temperature and corrosion resistance. Composite materials made using it as a reinforcing material are widely used across various industries. Fiber stiffness refers to its flexural rigidity and softness. Generally, if fiber stiffness is too low, it can easily adhere to the rubber wheel during winding, causing breakage and fuzzing, resulting in poor fiber processability. If fiber stiffness is too high, the fiber becomes brittle and prone to breakage and fuzzing during winding, implying poor fiber processability. Therefore, there exists an optimal stiffness value that optimizes fiber processability.

[0039] Conventional fiber stiffness measurement and sampling methods have numerous shortcomings. Most traditional sampling methods rely on manual labor, such as two people collaborating to secure the ends of the carbon fiber to a steel ruler and then using scissors or a blade to cut the sample to the desired length. This method is not only inefficient and time-consuming, but also susceptible to human factors, such as operator proficiency and visual errors, which can affect the sampling results and lead to significant deviations in measurement accuracy.

[0040] The following combination Figure 1-Figure 2 The embodiments of the present invention are further described.

[0041] In order to solve the above technical problems, the utility model provides a carbon fiber hardness detection device. By arranging a cutting part on the first carrier, automatic cutting of the carbon fiber is realized, the steps of manual operation are reduced, and production efficiency is improved. The cut carbon fiber can automatically move from upstream to downstream until it reaches the preset position, reducing manual intervention and improving overall operation efficiency. The fixing part on the second carrier can fix and press the carbon fiber after it reaches the preset position, which helps to maintain the stability and position accuracy of the carbon fiber during the measurement process of the measuring part, and prevent measurement errors caused by movement or vibration.

[0042] An exemplary embodiment of the present disclosure provides a carbon fiber hardness detection device, such as Figure 1 and Figure 2 As shown, a first carrier 1, a measuring portion 3 and a second carrier 2 are provided in sequence from upstream to downstream according to the direction of movement of the carbon fiber 9 to be tested after cutting. The first carrier 1 is provided with a cutting portion 110, and the second carrier 2 is provided with a fixing portion 210. The cutting portion 110 is used to cut the carbon fiber 9 to be tested located on the first carrier 1. The upper surfaces of the first carrier 1 and the second carrier 2 are located on the same horizontal line, and the upper surface of the measuring portion 3 is lower than the upper surface of the first carrier 1. The distance between the first carrier 1 and the second carrier 2 is 30 to 50 cm. In this embodiment, the distance between the first carrier 1 and the second carrier 2 is 30 cm.

[0043] When the carbon fiber 9 to be tested is cut and moved to the preset position, the fixing part 210 is used to fix and press the carbon fiber 9 to be tested on the second carrier 2, wherein the preset position is that the cut end of the carbon fiber 9 to be tested coincides with the end face of the first carrier 1 close to the second carrier 2, and the measuring part 3 is used to measure the distance between the projection of the cut end of the carbon fiber 9 to be tested on the horizontal plane and the end face of the second carrier 2 close to the first carrier 1 after the cut carbon fiber 9 is suspended for a preset time. For example, referring to Figure 1 and Figure 2 After the cutting part 110 on the first carrier 1 cuts the right side of the carbon fiber 9 to be tested, a counterweight 5 can be set at the left end of the carbon fiber 9 to be tested. The counterweight 5 will drive the cut carbon fiber 9 to be tested to move to the left. When the cut end of the carbon fiber 9 to be tested moves to the same vertical level as the left side wall of the first carrier 1, the fixing part 210 on the second carrier 2 fixes the cut carbon fiber 9 to be tested. After the cut carbon fiber 9 to be tested is suspended for 60 minutes, refer to Figure 2The cut end of the carbon fiber 9 to be tested will naturally bend to a static state under the action of its own hardness and gravity, and then the horizontal distance between the projection of the cut end of the carbon fiber 9 to be tested on the horizontal plane and the end face of the second platform 2 close to the first platform 1 is measured by the measuring part 3 between the first platform 1 and the second platform 2, which is the hardness result of the carbon fiber.

[0044] In this way, a cutting part 110 is set on the first carrier 1 to realize automatic cutting of carbon fiber, reduce the steps of manual operation, and improve production efficiency. By setting a fixed cutting part 110 and a fixing part 210, it can be ensured that the conditions of each measurement are consistent, thereby improving the accuracy and repeatability of the measurement. The automated cutting, fixing and measuring process reduces the errors caused by human operation and improves the measurement accuracy. The fixing part 210 on the second carrier 2 can fix and press the carbon fiber after it reaches the preset position, which helps to maintain the stability and position accuracy of the carbon fiber during the measurement process of the measuring part 3 and prevent measurement errors caused by movement or vibration.

[0045] In some embodiments of the present invention, referring to Figure 1 and Figure 2 The first carrier 1 is provided with a cutting groove 111, which extends in a direction perpendicular to the carbon fiber 9 to be tested. A cutting knife 112 is slidably provided in the cutting groove 111, and the cutting knife 112 is used to cut the carbon fiber 9 to be tested. In this way, the cutting groove 111 provides a fixed motion trajectory for the cutting knife 112, ensuring that the cutting knife 112 can cut in a direction perpendicular to the carbon fiber 9 to be tested, thereby improving the cutting accuracy, further ensuring the cutting quality, and improving the measurement accuracy. At the same time, the sliding design of the cutting knife 112 in the cutting groove 111 can reduce the direct contact between the operator and the cutting knife 112, thereby reducing the safety risks during operation.

[0046] In some embodiments of the present invention, referring to Figure 1 and Figure 2 , along the moving direction of the carbon fiber 9 to be detected, a counterweight portion is further provided downstream of the fixing portion 210. It can be understood that the moving direction of the carbon fiber 9 to be detected is Figure 1The direction from right to left in the middle. The counterweight part includes a first wire guide roller 4 and a counterweight 5. The carbon fiber 9 to be detected is wound on the first wire guide roller 4 after passing through the fixed part 210. The first end of the carbon fiber 9 to be detected after passing around the first wire guide roller 4 is connected to the counterweight 5; the counterweight part is used to pull the cut carbon fiber 9 to be detected until the counterweight falls on the third platform 6. Among them, the counterweight 5 can include a weight, and the weight of the counterweight 5 is 50-150g. The first wire guide roller 4 is a fixed pulley. The material of the first wire guide roller 4 can be a single metal, stainless steel, polytetrafluoroethylene or ceramic material. The roller body is polished, the contact surface is smooth, and the surface friction coefficient is 0.01 to 0.15. The friction force can be ignored to ensure that the gravity of the counterweight 5 is equal to the tension exerted on the carbon fiber 9 to be detected. The length direction of the first wire guide roller 4 is parallel to the length direction of the second platform 2, and the height of the first wire guide roller 4 is the same as the height of the second platform 2. In this way, the counterweight portion can ensure that the carbon fiber 9 to be tested is in a natural hanging state before measurement, avoiding measurement errors caused by manual stretching or improper placement, reducing the steps of manual operation, and improving the efficiency and convenience of the overall detection process. At the same time, the first wire guide roller 4 is provided to provide a stable transmission path for the carbon fiber 9 to be tested. When the carbon fiber 9 to be tested passes through the fixed portion 210 and is pulled toward the counterweight portion, the first wire guide roller 4 can guide the carbon fiber to move smoothly in a predetermined direction, avoiding the offset or jamming of the carbon fiber during the transmission process.

[0047] In some embodiments of the present invention, referring to Figure 1 and Figure 2 , a first distance is set between the cutting groove 111 and the end face of the first carrier 1 close to the fixed part 210; a second distance is set between the counterweight 5 and the third carrier 6 before movement, and the first distance is equal to the second distance. Setting the distance between the counterweight 5 and the third carrier 6 before movement to be equal to the distance between the cutting groove 111 and the end face of the first carrier 1 close to the fixed part 210 makes the calibration process of the fiber to be tested simpler and more intuitive, and the operator can more easily determine the position of the fiber to be tested to ensure the accuracy and stability of the measurement results. That is, when the counterweight 5 falls on the third carrier 6, the cut end of the fiber to be tested can coincide with the end face of the first carrier 1 close to the fixed part 210. At this time, the fixed part 210 fixes the fiber to be tested, and the operator does not need to manually adjust the position of the carbon fiber 9 to be tested to align it with the specified end face after cutting, thereby saving operation time and labor costs, improving the accuracy of measurement, and ensuring the reliability and consistency of measurement results.

[0048] In some embodiments of the present invention, referring to Figure 1 and Figure 2The first distance is 5-15 cm. In this embodiment, the first distance is 10 cm, so the hanging height of the counterweight 5 is also 10 cm. Setting the first distance ensures that after the cutting blade 112 cuts the carbon fibers 9 to be tested, the carbon fibers 9 to be tested have sufficient space to move, thus avoiding movement difficulties or inaccurate positioning due to insufficient space, which in turn affects the measurement structure.

[0049] In some embodiments of the present invention, referring to Figure 1 and Figure 2 A wire withdrawal portion 7 is further provided upstream of the cutting portion 110 along the direction of movement of the carbon fiber 9 to be tested, for securing the second end of the carbon fiber 9 to be tested before cutting. The wire withdrawal portion 7 secures the second end of the carbon fiber 9 to be tested, preventing it from moving or deviating during the cutting process, thereby ensuring that the cutting blade 112 can accurately cut along the predetermined cutting line, thereby improving cutting accuracy and stability.

[0050] In some embodiments of the present invention, referring to Figure 1 and Figure 2 A second wire guide roller 8 is provided between the wire withdrawal section 7 and the cutting section 110, and the second wire guide roller 8 is arranged parallel to the extension direction of the wire cutting groove 111. Among them, the second wire guide roller 8 is a fixed pulley, and the material of the second wire guide roller 8 can be a single metal, stainless steel, polytetrafluoroethylene or ceramic material. The roller body is polished, the contact surface is smooth, and the surface friction coefficient is 0.01 to 0.15, and its friction force can be ignored. The setting of the second wire guide roller 8 can guide the carbon fiber 9 to be detected to be stably transmitted along the predetermined direction, ensuring that the carbon fiber 9 to be detected will not deviate from the predetermined path during the transmission process, thereby improving the stability and accuracy of the transmission, ensuring that the carbon fiber 9 to be detected is in the correct position and state before cutting, and helping to improve the cutting accuracy of the cutting knife 112 on the carbon fiber, so that the end face of the cut carbon fiber is smoother and the size is more accurate, thereby improving the accuracy of the measurement result.

[0051] In some embodiments of the present invention, referring to Figure 1 and Figure 2 The first godet roller 4 and the second godet roller 8 are arranged in parallel, and the upper surfaces of the first godet roller 4 and the second godet roller 8 are located on the same horizontal plane as the upper surface of the first carrier 1. In this way, the first godet roller 4 and the second godet roller 8 are arranged in parallel, which can ensure that the carbon fiber 9 to be tested maintains a stable path during movement, helping to reduce the deflection and distortion of the tow that affect the accuracy of the test results. In addition, the upper surfaces of the first godet roller 4 and the upper surface of the first carrier 1 are located on the same horizontal plane, which can ensure that the carbon fiber 9 to be tested will not generate additional tension or relaxation due to height changes during movement.

[0052] In some embodiments of the present invention, referring to Figure 1and Figure 2 , the fixing portion 210 includes a fixing block; after the carbon fiber 9 to be detected moves to the preset position, the lower surface of the fixing block is fitted with the upper surface of the second carrier 2 to fix the carbon fiber 9 to be detected; the end face of the fixing block close to the first carrier 1 and the end face of the second carrier 2 close to the first carrier 1 are located in the same plane. In other words, the fixing block is arranged directly above the second carrier 2, and the length of the fixing block is greater than or equal to the length of the second carrier 2. In this way, when the fixed block and the end face of the second carrier 2 are located in the same plane, when the fixed block and the second carrier 2 fix the carbon fiber 9 to be detected, it can ensure that the carbon fiber 9 to be detected is subjected to uniform pressure during the fixing process, thereby avoiding damage to the carbon fiber 9 to be detected due to excessive local pressure, and at the same time improving the stability and reliability of the fixation, and improving the accuracy of subsequent detection.

[0053] In some embodiments of the present invention, referring to Figure 1 and Figure 2 The measuring section 3 includes a measuring plate 310 and a lifting platform 320; the lifting platform 320 can be extended and retracted along the height direction of the first carrier 1. The measuring plate 310 is arranged at the upper end of the lifting platform 320. Along the width direction of the lifting platform 320, the two ends of the lifting platform 320 are respectively in contact with the first carrier 1 and the second carrier 2. For example, a scale line is provided on the measuring plate 310, and the lifting platform 320 can be extended and retracted along the height direction of the second carrier 2, so that the height of the measuring plate 310 can be adjusted as needed, thereby making the measuring section 3 applicable to the carbon fibers 9 to be tested of different hardnesses, improving the flexibility and adaptability of the measurement. According to the different degrees of natural bending of the carbon fibers 9 to be tested, the height of the lifting platform 320 can be adjusted to ensure that the measuring plate 310 and the carbon fibers 9 to be tested are in the appropriate measurement position, so that the measuring section 3 can work effectively in a variety of scenarios.

[0054] The contents described above can be implemented individually or in combination in various ways, and these variations are all within the scope of protection of the present invention.

[0055] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply the existence of any such actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article, or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or device. In the absence of further limitations, an element defined by the statement "comprising a ..." does not exclude the presence of other identical elements in the process, method, article, or device comprising the element.

[0056] Finally, it should be noted that the above examples are intended to illustrate the technical solutions of the present application, but not to limit them. Although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent substitutions for part of the technical features; and these modifications or substitutions do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A carbon fiber hardness detection device, characterized in that: According to the movement direction of the carbon fiber to be tested after cutting, a first carrier, a measuring part and a second carrier are provided in sequence from upstream to downstream, the first carrier is provided with a cutting part, and the second carrier is provided with a fixing part; The cutting unit is used to cut the carbon fiber to be tested located on the first carrier; When the carbon fiber to be tested is cut and moved to a preset position, the fixing portion is used to fix and press the carbon fiber to be tested on the second carrier, wherein the preset position is that the cut end of the carbon fiber to be tested coincides with the end surface of the first carrier on the side close to the second carrier; The upper surfaces of the first stage and the second stage are located on the same horizontal line, and the upper surface of the measuring portion is lower than the upper surface of the first stage; The measuring unit is used to measure the distance between the projection of the cut end of the carbon fiber to be detected on the horizontal plane and the end surface of the second platform close to the first platform after the cut carbon fiber to be detected is suspended for a preset time.

2. The carbon fiber hardness detection device according to claim 1, characterized in that: A cutting groove is provided on the first carrier, and the cutting groove extends in a direction perpendicular to the carbon fiber to be detected. A cutting knife is slidably provided in the cutting groove, and the cutting knife is used to cut the carbon fiber to be detected.

3. The carbon fiber hardness detection device according to claim 2, characterized in that: A counterweight portion is further provided downstream of the fixing portion along the moving direction of the carbon fiber to be detected; The counterweight portion includes a first godet roller and a counterweight block, the carbon fiber to be detected is wound around the first godet roller after passing through the fixing portion, and the first end of the carbon fiber to be detected after passing around the first godet roller is connected to the counterweight block; The counterweight portion is used to pull the cut carbon fiber to be tested until the counterweight portion falls on the third carrier.

4. The carbon fiber hardness detection device according to claim 3, characterized in that: A first distance is provided between the cutting groove and the end surface of the first platform close to the fixing portion; A second distance is set between the counterweight block and the third platform before the movement; The first distance is equal to the second distance.

5. The carbon fiber hardness detection device according to claim 4, characterized in that: The first distance is 5-15 cm.

6. The carbon fiber hardness detection device according to claim 3, characterized in that: Along the moving direction of the carbon fiber to be detected, a wire withdrawing portion is further provided upstream of the cutting portion for fixing the second end of the carbon fiber to be detected before cutting.

7. The carbon fiber hardness detection device according to claim 6, characterized in that: A second wire guide roller is provided between the wire withdrawing portion and the cutting portion, and the second wire guide roller is provided in parallel with an extending direction of the wire cutting groove.

8. The carbon fiber hardness detection device according to claim 7, characterized in that: The first godet roller and the second godet roller are arranged in parallel, and upper surfaces of the first godet roller and the second godet roller are located on the same horizontal plane as an upper surface of the first carrier.

9. The carbon fiber hardness detection device according to any one of claims 1 to 8, characterized in that: The fixing portion includes a fixing block; After the carbon fiber to be detected moves to the preset position, the lower surface of the fixing block is in contact with the upper surface of the second carrier to fix the carbon fiber to be detected; An end surface of the fixing block close to the first stage and an end surface of the second stage close to the first stage are located in the same plane.

10. The carbon fiber hardness detection device according to any one of claims 1 to 8, characterized in that: The measuring part includes a measuring plate and a lifting platform; The lifting platform can be extended and retracted along the height direction of the first platform. The measuring plate is arranged at the upper end of the lifting platform. Along the width direction of the lifting platform, both ends of the lifting platform are respectively in contact with the first platform and the second platform.

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