A carbon fiber tension detection assembly and a carbon fiber yarn feeding tensioner applying the same

Abstract

The application discloses a carbon fiber tension detection assembly and a carbon fiber yarn feeding tension device applying the same, and relates to the technical field of carbon fiber tension control. The carbon fiber tension detection assembly comprises an auxiliary conveying assembly and an electrode assembly. Carbon fiber tows are input from a conveying inlet of the auxiliary conveying assembly and output from a conveying outlet of the auxiliary conveying assembly. The carbon fiber tows form at least one conveying length at any moment when passing through the auxiliary conveying assembly. The electrode assembly is used for contacting and detecting the resistance value of the carbon fiber tows of a specified conveying length to provide a resistance signal used for finally calculating the tension data of the carbon fiber tows. The carbon fiber yarn feeding tension device applying the same utilizes the conductivity and resistance-strain effect of the carbon fiber itself. The carbon fiber simultaneously plays a dual role of a processed object and a tension sensor. The tension detection and control without an additional tension sensor can be realized without an additional tension sensor.

Description

Technical Field

[0001] This invention relates to the field of carbon fiber tension control technology, specifically to a carbon fiber tension detection component and a carbon fiber yarn feeding tensioner using the same. Background Technology

[0002] Carbon fiber composites, with their superior properties such as high specific strength, high specific modulus, high temperature resistance, and corrosion resistance, have been widely used in aerospace, new energy vehicles, wind power generation, and sporting goods. In the processes of carbon fiber prepreg preparation, winding, and weaving, tension control is a core parameter determining product quality—excessive tension can easily lead to fiber damage or even breakage, while insufficient tension results in fiber loosening and uneven arrangement, directly affecting the mechanical properties of the final product.

[0003] Current carbon fiber tension control solutions are mainly divided into active warp feeding, passive tensioners, and electronic closed-loop tensioners.

[0004] The active warp feeding scheme mainly relies on servo motor drive, and actively adjusts the yarn feeding speed based on sensor feedback.

[0005] Passive tensioners (also known as open-loop tensioners) rely primarily on mechanical structures to apply constant resistance, causing the yarn bobbin to unwind passively.

[0006] Electronic closed-loop tensioners rely primarily on sensors for real-time monitoring and controllers for dynamic adjustment of the tension control mechanism to achieve closed-loop tension control.

[0007] Compared to passive tensioners, active warp feeding schemes and electronic closed-loop tensioners offer better controllability, can automatically adjust in real time according to working conditions, and are more suitable for dealing with various emergencies.

[0008] However, both active yarn feeding systems and electronic closed-loop tensioners require independent tension sensors for tension detection. Furthermore, the tension sensors themselves require regular calibration and maintenance, increasing equipment operating costs. Optimization remains a significant challenge. Summary of the Invention

[0009] To overcome the shortcomings mentioned above, the present invention aims to provide a technical solution to address the aforementioned technical problems.

[0010] To achieve the above objectives, the present invention provides the following technical solution: a carbon fiber tension detection component, comprising... An auxiliary conveying assembly is configured to receive carbon fiber bundles at the conveying inlet and output them at the conveying outlet of the auxiliary conveying assembly, wherein the carbon fiber bundles form at least one conveying length at any time they are inserted into the auxiliary conveying assembly. Electrode assembly for contact detection of the resistance value of a carbon fiber bundle of a specified delivery length, in order to provide a resistance signal ultimately used to calculate the tension data of the carbon fiber bundle.

[0011] As a further aspect of the present invention: the auxiliary conveying component includes a conveying frame, on which a first conveying roller and a second conveying roller are provided. The carbon fiber bundle passes through the first conveying roller and the second conveying roller in sequence along the wire feeding direction and forms a conductive contact with the first conveying roller and the second conveying roller. The electrode assembly includes a first electrode electrically connected to a first conveying roller and a second electrode electrically connected to a second conveying roller; the resistance of the carbon fiber bundle, based on the electrical connection path formed by the first electrode, the carbon fiber bundle, and the second electrode, is used to detect the conveying length from the first conveying roller to the second conveying roller.

[0012] As a further aspect of the present invention: the auxiliary conveying assembly further includes a third conveying roller disposed on the conveying frame, wherein the carbon fiber bundle passes sequentially through the first conveying roller, the second conveying roller, and the third conveying roller along the wire feeding direction and forms conductive contact with the first conveying roller, the second conveying roller, and the third conveying roller; The electrode assembly also includes a third electrode electrically connected to the third conveyor roller; It also uses the electrical connection path formed by the second electrode, the carbon fiber bundle, and the third electrode to detect the resistance of the carbon fiber bundle during the conveying length from the second conveyor roller to the third conveyor roller.

[0013] As a further aspect of the present invention: the second electrode constitutes the positive detection electrode, and the first electrode and the third electrode constitute the negative detection electrode.

[0014] Compared with the prior art, the beneficial effects of this technical solution are: by using the above-mentioned carbon fiber tension detection component, the carbon fiber itself has the electrical conductivity and resistance-strain effect, and the carbon fiber simultaneously plays the dual role of the workpiece and the tension sensor, so that tension detection can be achieved without the need to install an additional tension sensor.

[0015] This invention also provides the following technical solution: a carbon fiber yarn feeding tensioner, comprising the aforementioned carbon fiber tension detection component, and further comprising... The control unit is electrically connected to the electrode assembly. The control unit obtains the resistance value information of the carbon fiber bundle through the electrode assembly. The control unit includes a microprocessor and a storage module. The microprocessor has a built-in carbon fiber resistance-strain calibration model, which is used to convert the real-time acquired resistance value into a tension value. Tension adjustment mechanism, used to adjust the tension on the carbon fiber bundle; in, The microprocessor compares the calculated real-time tension value with the preset target tension value, and controls the tension adjustment mechanism to adjust the tension of the carbon fiber bundle accordingly based on the comparison result.

[0016] As a further aspect of the present invention: the microprocessor compares the calculated real-time tension value with the preset target tension value, generates a control signal through an adaptive PID control algorithm, and outputs it to the tension adjustment mechanism.

[0017] As a further aspect of the present invention: the control unit uses a constant current source measurement method or a differential measurement method to acquire the resistance value of the carbon fiber bundle through the electrode assembly.

[0018] As a further aspect of the present invention: the tension adjustment mechanism includes an adjustment frame, on which an infeed guide roller, a tension adjustment roller assembly and an outfeed guide roller are sequentially installed along the fiber bundle feeding direction; The carbon fiber bundle is introduced from the infeed guide roller, passes through the tension adjustment roller assembly in sequence, and is then led out from the outlet guide roller.

[0019] As a further aspect of the present invention: the tension adjusting roller assembly includes an electrically controlled lifting drive assembly and a liftable movable roller. The movable roller is driven to rise and fall by the electrically controlled lifting drive assembly. When the movable roller rises and falls, it constitutes tension adjustment of the carbon fiber bundle.

[0020] As a further aspect of the present invention: the electrically controlled lifting drive assembly is driven by a servo motor or a stepper motor through a lead screw, nut, guide rail, and slider assembly for lifting; Based on the comparison results, the control unit outputs voltage, current, or PWM duty cycle signals to control the lifting and lowering of the movable roller.

[0021] Compared with the prior art, the beneficial effects of this technical solution are: by using the above-mentioned carbon fiber tension detection component and corresponding tension control, the carbon fiber itself has the electrical conductivity and resistance-strain effect, and the carbon fiber simultaneously plays the dual role of the workpiece and tension sensor. Tension detection and control can be achieved without the need for additional tension sensors.

[0022] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. 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 effort.

[0024] Figure 1This is a schematic diagram of the structure of the present invention, showing the electrical connections between the control unit and the first electrode, the second electrode, the third electrode and the servo motor in the form of dashed lines; Figure 2 This is another structural schematic diagram of the present invention, showing the feeding of carbon fiber bundles, with the feeding direction from left to right; Figure 3 This is a circuit block diagram of the present invention.

[0025] The corresponding labels in the attached diagram are explained as follows: Carbon fiber tension detection assembly-1, auxiliary conveying assembly-11, conveying inlet-11a, conveying outlet-11b, conveying frame-111, first conveying roller-112, second conveying roller-113, third conveying roller-114, electrode assembly-12, first electrode-121, second electrode-122, third electrode-123. Carbon fiber tow - 2, conveying lengths - 2a, 2b Control unit-3, microprocessor-31, storage module-32, signal conditioning module-33, AD conversion module-34. Tension adjustment mechanism-4, adjustment frame-41, infeed guide roller-42, tension adjustment roller assembly-43, movable roller-431, servo motor-432, lead screw nut guide rail slider assembly-433, outfeed guide roller-44. Input Unit-5. Detailed Implementation

[0026] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0027] Please see Figure 1-3 In this embodiment, a carbon fiber tension detection component 1 includes an auxiliary conveying component 11 and an electrode component 12.

[0028] The carbon fiber bundle 2 is configured to be input from the conveying inlet 11a of the auxiliary conveying assembly 11 and output from the conveying outlet 11b of the auxiliary conveying assembly. The carbon fiber bundle 2 forms at least one conveying length at any time it is inserted into the auxiliary conveying assembly.

[0029] Electrode assembly 12 is used to contact and detect the resistance value of a carbon fiber bundle of a specified delivery length to provide a resistance signal for the final calculation of the tension data of the carbon fiber bundle.

[0030] In some embodiments, the auxiliary conveying assembly 11 includes a conveying frame 111, on which a first conveying roller 112 and a second conveying roller 113 are provided. The carbon fiber bundle 2 passes through the first conveying roller 112 and the second conveying roller 113 in sequence along the wire feeding direction and forms conductive contact with the first conveying roller 112 and the second conveying roller 113.

[0031] The electrode assembly 12 includes a first electrode 121 electrically connected to the first conveying roller and a second electrode 122 electrically connected to the second conveying roller; based on the electrical connection path formed by the first electrode 121, the carbon fiber bundle 2 and the second electrode 122, it is used to detect the resistance of the carbon fiber bundle along the conveying length 2a from the first conveying roller 112 to the second conveying roller 113.

[0032] In some embodiments, the auxiliary conveying assembly 11 further includes a third conveying roller 114 disposed on the conveying frame 111. The carbon fiber bundle 2 passes sequentially through the first conveying roller 112, the second conveying roller 113, and the third conveying roller 114 along the wire feeding direction and forms conductive contact with the first conveying roller 112, the second conveying roller 113, and the third conveying roller 114.

[0033] The electrode assembly 12 also includes a third electrode 123 electrically connected to the third conveying roller; and is used to detect the resistance of the carbon fiber bundle along a conveying length 2b from the second conveying roller 113 to the third conveying roller 114 based on the electrical connection path formed by the second electrode 122, the carbon fiber bundle 2 and the third electrode 123.

[0034] In some embodiments, the second electrode 122 constitutes the positive detection electrode, and the first electrode 121 and the third electrode 123 constitute the negative detection electrode.

[0035] In this embodiment, a carbon fiber yarn feeding tensioner is also disclosed, including the carbon fiber tension detection component 1 disclosed in any of the above embodiments. The carbon fiber yarn feeding tensioner also includes a control unit 3 and a tension adjustment mechanism 4.

[0036] The control unit 3 is electrically connected to the electrode assembly 12, and the control unit 3 acquires the resistance value information of the carbon fiber bundle through the electrode assembly 12. The control unit 3 includes a microprocessor 31 and a storage module 32. The microprocessor 31 has a built-in carbon fiber resistance-strain calibration model, which is used to convert the real-time acquired resistance value into a tension value.

[0037] Tension adjustment mechanism 4 is used to adjust the tension on the carbon fiber bundle.

[0038] The microprocessor 31 compares the calculated real-time tension value with the preset target tension value, and controls the tension adjustment mechanism 4 to make corresponding tension adjustments to the carbon fiber bundle based on the comparison result.

[0039] In some embodiments, the carbon fiber resistance-strain calibration model converts the real-time collected resistance values ​​into corresponding tension values ​​based on the specifications of the carbon fiber bundles (including the number of bundles, elastic modulus, cross-sectional area, initial resistivity, etc.).

[0040] Specifically, the resistance-strain relationship of carbon fiber is based on the following formula: in, R This is the real-time resistance value. R 0 represents the initial resistance value (pre-entered). k The strain sensitivity coefficient of carbon fiber (pre-entered). ε Tensile strain of carbon fiber (pre-entered).

[0041] Tension is calculated based on Hooke's Law, tension T = E·A·ε, where E is the elastic modulus of carbon fiber (pre-entered) and A is the cross-sectional area (pre-entered).

[0042] The relationship between tension and resistance is as follows: This model enables carbon fiber itself to simultaneously serve as both a "processed object" and a "sensor," realizing the application of tension control with the principle of "material as sensor."

[0043] In some embodiments, the microprocessor 31 compares the calculated real-time tension value with a preset target tension value, and controls the tension adjustment mechanism 4 to output tension adjustment based on the preset target tension value and the difference between the real-time tension value and the calculated tension value.

[0044] For example, when the calculated real-time tension value is greater than the preset target tension value, the tension adjustment mechanism is controlled to output a reduction in the corresponding tension. For example, when the calculated real-time tension value is less than the preset target tension value, the tension adjustment mechanism is controlled to increase the corresponding tension adjustment.

[0045] In some embodiments, the microprocessor 31 compares the calculated real-time tension value with the preset target tension value, generates a control signal through an adaptive PID control algorithm, and outputs it to the tension adjustment mechanism 4.

[0046] In some embodiments, in the adaptive PID control algorithm, the PID parameters (proportional gain) Kp Integral Time Ti Differential time Td Online adjustment is performed using fuzzy adaptive rules: when the tension deviation is large, the adjustment is increased. Kp With a rapid response, the deviation decreases once it enters the steady-state region. KpTo prevent overshoot and achieve adaptive matching for different operating conditions.

[0047] In some embodiments, the tension adjustment mechanism 4 includes an adjustment frame 41, on which an infeed guide roller 42, a tension adjustment roller assembly 43, and an outfeed guide roller 44 are sequentially mounted along the fiber filament feeding direction. The carbon fiber filament 2 is introduced from the infeed guide roller 42, passes around the tension adjustment roller assembly 43, and is then led out from the outfeed guide roller 44.

[0048] In some embodiments, the tension adjusting roller assembly 43 includes an electrically controlled lifting drive assembly and a liftable movable roller 431. The movable roller 431 is driven to lift by the electrically controlled lifting drive assembly, and when the movable roller 431 is lifted, it constitutes tension adjustment of the carbon fiber bundle 2.

[0049] Combination Figure 1 , 2 As shown, taking the direction of the carbon fiber bundle 2 from left to right at the tension adjustment mechanism as an example: the infeed guide roller 42 is set on the left side of the adjustment frame 41, the outfeed guide roller 44 is set on the right side of the adjustment frame 41, and the movable roller 431 is set in the middle of the adjustment frame 41.

[0050] The carbon fiber tow 2 first passes over the upper surface of the infeed guide roller 42, then over the lower surface of the movable roller 431, and then over the upper surface of the outlet guide roller 44. An electrically controlled lifting drive assembly drives the movable roller 431 to rise and fall, increasing the downward pressure on the carbon fiber tow 2 to increase tension when the movable roller 431 descends, and decreasing the downward pressure on the carbon fiber tow 2 to reduce tension when the movable roller 431 rises.

[0051] In some embodiments, the electrically controlled lifting drive assembly may be driven by a servo motor 432 or a stepper motor via a lead screw, nut, guide rail, and slider assembly 433. The movable roller 431 is correspondingly disposed on the slider of the lead screw, nut, guide rail, and slider assembly 433.

[0052] In this embodiment, by utilizing the conductivity and resistance-strain effect of the carbon fiber itself, the carbon fiber bundle simultaneously acts as both the workpiece and the tension sensor, achieving tension detection without the need for an additional tension sensor.

[0053] In this embodiment, tension detection and control without an external tension sensor can be achieved through the aforementioned carbon fiber tension detection component 1 and the corresponding tension control.

[0054] In this embodiment, when applied to applications such as the preparation of carbon fiber prepreg (which requires the delivery of multiple carbon fiber bundles, such as the common 266-head bundle), a large number of tension sensors can be saved while meeting the requirements of closed-loop control that enables tension detection and control.

[0055] In some embodiments, when applied to, for example, the preparation of carbon fiber prepreg, the auxiliary conveying assembly 11 can simultaneously constitute the auxiliary conveying structure of the carbon fiber prepreg preparation equipment. That is, during the process of unwinding the carbon fiber tow from the yarn rack to the weaving equipment, the auxiliary conveying assembly is arranged therein. Alternatively, it can be understood as using multiple conveying rollers (a first conveying roller, a second conveying roller, or possibly a third conveying roller) used to assist the carbon fiber tow as auxiliary conveying components, and electrically connecting the corresponding electrode assemblies to the corresponding conveying rollers. This further reduces the hardware configuration while satisfying tension detection and control requirements.

[0056] In some embodiments, when the carbon fiber bundle is in a tension-free state, the initial resistance value between the two electrodes can be acquired through the electrode assembly. R The value is set to 0 and stored in the storage module. This initial value serves as the baseline for subsequent tension calculations.

[0057] In some embodiments, the electrodes (first electrode 121, second electrode 122, and third electrode 123) form electrical contact with the surface of the carbon fiber bundle 2 through corresponding conveying rollers (corresponding to first conveying roller 112, second conveying roller 113, and third conveying roller 114). The electrodes are connected to the control unit 3 for collecting the resistance value of the carbon fiber bundle 2 between the two electrodes (e.g., the resistance value between the first electrode and the second electrode is achieved through the contact of the first and second conveying rollers, i.e., conveying length 2a; or the resistance value between the second electrode and the third electrode is achieved through the contact of the second and third conveying rollers, i.e., conveying length 2b).

[0058] In some embodiments, the first conveying roller 112, the second conveying roller 113, and the third conveying roller 114 are all insulated from the conveying frame 111. For example, the conveying frame and the conveying rollers are connected by insulating fasteners to avoid mutual conduction.

[0059] In some embodiments, the second electrode 122 constitutes the positive electrode, and the first electrode 121 and the third electrode 123 constitute the negative electrode. That is, one positive electrode and two negative electrodes are formed.

[0060] When used normally, this is equivalent to creating a dual detection mechanism: First, detect the change in resistance from the positive terminal to the first negative terminal; Second, detect the change in resistance from the positive terminal to the second negative terminal.

[0061] Combining these two changes facilitates timely control. Normally, the corresponding tension changes should be close in proportion with minimal error; a larger error indicates abnormal looseness, allowing for appropriate control measures. These measures can include alerts via configured alarm devices, such as on-site lighting alarms, central control panel pop-up alarms, or shutdown controls.

[0062] Furthermore, the two negative electrodes are located at the front and rear ends of the detection area, respectively, to confine the detection signal within the detection area. That is, the high-potential signal of the positive electrode is not affected by the front end (first negative electrode) of the detection area, nor by the rear end (second negative electrode) of the detection area, which is more conducive to accurate detection.

[0063] In some implementations, the position of the first conveying roller 112 can be regarded as the conveying inlet of the auxiliary conveying component, and the position of the third conveying roller 114 can be regarded as the conveying outlet of the auxiliary conveying component. The carbon fiber bundle 2 first reaches the first conveying roller 112, passes around the second conveying roller 113, and then exits from the third conveying roller 114.

[0064] For example, the carbon fiber tow 2 passes over the first conveyor roller 112, then passes under the second conveyor roller 113, and then passes over the third conveyor roller 114.

[0065] In some embodiments, the conveying roller is, for example, a conductive metal roller or a conductive rubber roller, and the corresponding electrode is connected to the corresponding conveying roller to form an electrical contact when the carbon fiber bundle comes into contact with the conveying roller.

[0066] In some embodiments, the electrode may be electrically connected to the end of the corresponding feed roller to better avoid the main friction area during the yarn feeding process.

[0067] In some embodiments, an input unit 5 is also provided, which is used at least to input or change the target tension value. The input unit 5 is, for example, a wired input unit such as a button unit or a touch unit electrically connected to the control unit 3; the input unit 5 can also be a wireless unit that communicates wirelessly with a configured user wireless control terminal, the wireless unit being electrically connected to the control unit 4 to receive signals from the user wireless control terminal for the control unit 3 to at least input or change the target tension value.

[0068] In some embodiments, the preset target tension value can be a default tension value pre-entered by the control unit 3, such as the 3kg tension commonly used for carbon fiber tow.

[0069] When the above-mentioned input unit 5 is provided, the preset target tension value can be an adjustable target tension value that can be set by the user.

[0070] In some embodiments, the control unit 3 further includes a signal conditioning module 33 and an AD conversion module 34.

[0071] In some embodiments, the control unit 3 may acquire the resistance value of the carbon fiber bundle through the electrode assembly 12 by means of, for example, a constant current source measurement method.

[0072] For example, the signal conditioning module 33 of the control unit generates a stable DC constant current source I (such as any value in the range of 1mA-50mA, such as 10mA).

[0073] The constant current source is connected to the corresponding electrode, for example, by means of a wire connection, and the current flows through the carbon fiber bundle segment between different electrodes (i.e., the formed transport length).

[0074] In some embodiments, when three conveying rollers (first conveying roller, second conveying roller, and third conveying roller) are provided and correspondingly constitute one positive electrode and two negative electrodes, the two negative electrodes are connected to different detection terminals of the control unit, and share the same positive electrode to perform their respective detections for the corresponding conveying length according to the equal pressure diversion method.

[0075] In some embodiments, the control unit 3 may also use a differential measurement method to detect the resistance value of the carbon fiber bundle.

[0076] For example, the voltage V at both ends of the carbon fiber bundle (transport length) is introduced into the high impedance differential amplifier of the control unit 3 using the first electrode 121 and the second electrode 122.

[0077] In some embodiments, the AD conversion module 34 is used to convert the resistance signal into a digital signal.

[0078] In this embodiment, an adaptive intelligent tension control method based on carbon fiber self-sensing is also disclosed, including the following steps: First, the resistance-strain calibration model and initial PID parameters are built into and loaded into the control unit. The loaded resistance-strain calibration model contains the current specifications of the carbon fiber bundle. Then, with the carbon fiber bundle in a tension-free state, the initial resistance value of the transport length between the electrodes is collected through the electrode assembly. R The value is set to 0 and stored in the storage module; this initial value serves as the basis for subsequent tension calculations. Next, during the fiber tow's spinning process, the electrode assembly continuously collects real-time resistance values. R The microprocessor calculates the current tension value in real time according to the resistance-strain model; Next, the real-time tension value is compared with the preset target tension value to calculate the tension deviation. e ( t )= Ttarget T ( t ); T target is the target tension. T ( t (This refers to real-time tension.) The adaptive PID controller adjusts the PID parameters online based on the magnitude and rate of change of the deviation, generating control inputs. in, proportional gain Kp The proportional control coefficient determines the strength of the current deviation's impact on the control quantity; Points Time Ti This is the time coefficient for the integral term, used to eliminate static bias; Differential time Td The time coefficient of the differential term is used to predict the trend of deviation changes and suppress overshoot and oscillation; It is the deviation integral, which is the cumulative value of tension deviation from the initial time to the current time, used to eliminate long-term steady-state error; The deviation change rate is the rate at which the tension deviation changes over time, reflecting the instantaneous dynamics of the deviation.

[0079] In some embodiments, the control unit is based on the total control quantity. u ( t It outputs corresponding control signals to the tension adjustment mechanism. For example, it controls the voltage, current, or PWM duty cycle signal of the servo motor 432 to control the lifting and lowering of the movable roller 431.

[0080] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A carbon fiber tension detection component, characterized in that, include An auxiliary conveying assembly is configured to receive carbon fiber bundles at the conveying inlet and output them at the conveying outlet of the auxiliary conveying assembly, wherein the carbon fiber bundles form at least one conveying length at any time they are inserted into the auxiliary conveying assembly. Electrode assembly for contact detection of the resistance value of a carbon fiber bundle of a specified delivery length, in order to provide a resistance signal ultimately used to calculate the tension data of the carbon fiber bundle.

2. The carbon fiber tension detection component according to claim 1, characterized in that, The auxiliary conveying assembly includes a conveying frame, on which a first conveying roller and a second conveying roller are provided. The carbon fiber bundle passes through the first conveying roller and the second conveying roller in sequence along the wire feeding direction and forms a conductive contact with the first conveying roller and the second conveying roller. The electrode assembly includes a first electrode electrically connected to a first conveying roller and a second electrode electrically connected to a second conveying roller; the resistance of the carbon fiber bundle, based on the electrical connection path formed by the first electrode, the carbon fiber bundle, and the second electrode, is used to detect the conveying length from the first conveying roller to the second conveying roller.

3. The carbon fiber tension detection component according to claim 2, characterized in that, The auxiliary conveying assembly also includes a third conveying roller mounted on the conveying frame. The carbon fiber bundle passes sequentially through the first conveying roller, the second conveying roller, and the third conveying roller along the wire feeding direction and forms conductive contact with the first conveying roller, the second conveying roller, and the third conveying roller. The electrode assembly also includes a third electrode electrically connected to the third conveyor roller; It also uses the electrical connection path formed by the second electrode, the carbon fiber bundle, and the third electrode to detect the resistance of the carbon fiber bundle during the conveying length from the second conveyor roller to the third conveyor roller.

4. The carbon fiber tension detection component according to claim 3, characterized in that, The second electrode forms the positive detection electrode, while the first and third electrodes form the negative detection electrode.

5. A carbon fiber yarn feeding tensioner, characterized in that, Including the carbon fiber tension detection component according to any one of claims 1-4, further comprising: The control unit is electrically connected to the electrode assembly. The control unit obtains the resistance value information of the carbon fiber bundle through the electrode assembly. The control unit includes a microprocessor and a storage module. The microprocessor has a built-in carbon fiber resistance-strain calibration model, which is used to convert the real-time acquired resistance value into a tension value. Tension adjustment mechanism, used to adjust the tension on the carbon fiber bundle; in, The microprocessor compares the calculated real-time tension value with the preset target tension value, and controls the tension adjustment mechanism to adjust the tension of the carbon fiber bundle accordingly based on the comparison result.

6. The carbon fiber yarn feeding tensioner according to claim 5, characterized in that, The microprocessor compares the calculated real-time tension value with the preset target tension value, generates a control signal through an adaptive PID control algorithm, and outputs it to the tension adjustment mechanism.

7. The carbon fiber yarn feeding tensioner according to claim 5, characterized in that, The control unit uses a constant current source measurement method or a differential measurement method to acquire the resistance value of the carbon fiber bundle through an electrode assembly.

8. The carbon fiber yarn feeding tensioner according to claim 5, characterized in that, The tension adjustment mechanism includes an adjustment frame, on which an infeed guide roller, a tension adjustment roller assembly, and an outfeed guide roller are sequentially installed along the fiber bundle feeding direction. The carbon fiber bundle is introduced from the infeed guide roller, passes through the tension adjustment roller assembly in sequence, and is then led out from the outlet guide roller.

9. The carbon fiber yarn feeding tensioner according to claim 8, characterized in that, The tension regulating roller assembly includes an electrically controlled lifting drive assembly and a liftable movable roller. The movable roller is driven to rise and fall by the electrically controlled lifting drive assembly. When the movable roller rises and falls, it adjusts the tension of the carbon fiber bundle.

10. The carbon fiber yarn feeding tensioner according to claim 9, characterized in that, The electrically controlled lifting drive assembly uses a servo motor or stepper motor to drive the lifting via a lead screw, nut, guide rail, and slider assembly. Based on the comparison results, the control unit outputs voltage, current, or PWM duty cycle signals to control the lifting and lowering of the movable roller.

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