Carbon fiber sizing method, system, equipment and medium

Abstract

The invention discloses a carbon fiber sizing method, system and equipment and a medium, and relates to the technical field of carbon fiber sizing treatment.The method comprises the steps that a slurry concentration set in a sizing tank is obtained in real time; searching a detection area corresponding to the sizing agent concentration smaller than the preset concentration in the size concentration set to obtain a to-be-supplemented size set; calculating a concentration difference value between the sizing agent concentration of each to-be-supplemented liquid area and a preset concentration; a liquid supplementing database is called, the difference value range of the concentration difference value is searched in the liquid supplementing database, and the corresponding adjusting opening degree is obtained; and the actual opening degrees of all the slurry supplementing valves in the to-be-supplemented liquid area are adjusted according to the adjusting opening degree. The sizing agent concentrations of different detection areas obtained in real time and the liquid supplementing database are used for judging the adjusting opening degrees corresponding to all the detection areas, the difference of the sizing agent concentrations of all the detection areas in the sizing tank is rapidly shortened, the consistency and stability of the sizing agent concentrations are improved, and the fluctuation degree of the sizing amount of a finally obtained carbon fiber product is reduced.

Description

Technical Field

[0001] The present application generally relates to the technical field of carbon fiber sizing treatment, and specifically relates to a carbon fiber sizing method, system, equipment and medium. Background Art

[0002] Carbon fiber is a new type of carbon material with the advantages of high strength, low density, high temperature resistance, corrosion resistance, good electrical and thermal conductivity, etc. It is widely used in the preparation of various components and functional composite materials. In the production process of carbon fiber, a layer of sizing agent is impregnated on the surface of the carbon fiber to form a protective film on the surface of the carbon fiber material, and the functional groups in the sizing agent can improve the affinity between the carbon fiber and the resin. The use of a uniform sizing tank concentration can ensure a stable and uniform amount of fiber sizing.

[0003] In the prior art, sizing agents are mostly added directly into the sizing tank, and there is no circulation system for the liquid in the sizing tank, which results in differences in the concentration of sizing agents in different positions in the sizing tank, resulting in large fluctuations in the sizing amount of the final carbon fiber product. Therefore, we propose a carbon fiber sizing method, system, equipment and medium to solve the above problems. Summary of the invention

[0004] In view of the above-mentioned defects or deficiencies in the prior art, it is desired to provide a carbon fiber sizing method, system, equipment and medium that improve the consistency and stability of sizing agent concentration and enhance the sizing quality of carbon fiber.

[0005] In a first aspect, the present application provides a carbon fiber sizing method, which is applied to a carbon fiber sizing device, wherein the carbon fiber sizing device at least comprises: a material guide unit, a sizing tank and a slurry circulation unit used in conjunction with each other; the material guide unit is arranged across the sizing tank, and is used to transport carbon fibers into and out of the sizing tank; the slurry circulation unit has a plurality of slurry branches connected to the sizing tank, and a slurry valve is installed on each of the slurry branches; the method comprises the following steps: Acquire a set of slurry concentrations inside the sizing tank in real time; the set of slurry concentrations includes sizing agent concentrations of all detection areas in the sizing tank at the same time; Searching for the detection area corresponding to the sizing agent concentration less than the preset concentration in the slurry concentration set to obtain the slurry set to be replenished; the slurry set to be replenished includes at least one area to be replenished and the corresponding sizing agent concentration; Calculating the concentration difference between the sizing agent concentration of each of the areas to be replenished and the preset concentration; Calling a liquid replenishment database, and searching the liquid replenishment database for the difference range in which the concentration difference value is located, and obtaining the corresponding adjustment opening; the liquid replenishment database at least includes: a plurality of difference ranges and the adjustment opening corresponding to each of the difference ranges; The actual openings of all the slurry replenishing valves in the area to be replenished are adjusted according to the adjustment openings.

[0006] According to the technical solution provided in the present application, the slurry concentration set inside the sizing tank is obtained in real time, which specifically includes the following steps: Dividing the sizing tank into a plurality of detection areas along the sizing movement direction of the carbon fiber; The sizing agent concentrations of all detection areas are collected synchronously to obtain the sizing agent concentration set inside the sizing tank.

[0007] According to the technical solution provided in the present application, the sizing tank is divided into a plurality of detection areas along the sizing movement direction of the carbon fiber, specifically comprising the following steps: Obtain a historical concentration set of the sizing tank; the historical concentration set at least includes: multiple sets of concentration data at consecutive historical moments; each set of concentration data includes the concentration of each initial detection point of the sizing tank corresponding to the sizing of the carbon fiber of a preset length; generating a concentration change curve according to the historical concentration set, and determining a division node based on the concentration change curve; According to the division nodes, the sizing tank is divided into a plurality of detection areas along the sizing moving direction of the carbon fiber.

[0008] According to the technical solution provided by the present application, before obtaining the slurry concentration set inside the sizing tank in real time, the following steps are also included: Acquire an infrared image set of the sizing agent in the sizing tank; the infrared image set includes a plurality of infrared image information; Based on the infrared image set, construct a temperature distribution map corresponding to each infrared image information; Traversing all the temperature distribution graphs, marking abnormal image information of temperature abnormal points; The bubble position is determined according to the abnormal image information, and a first warning message is generated; the first warning message is used to prompt the staff to prohibit starting the sizing operation.

[0009] According to the technical solution provided by the present application, after marking the abnormal image information with abnormal temperature points and before generating the first warning information, the following steps are also included: The rotation speed of the stirring part is adjusted according to the straight-line distance between the center point of the bubble position and the stirring part at the bottom of the sizing tank.

[0010] According to the technical solution provided by this application, the following steps are also included: Acquire multiple image data of the interior of the sizing tank, and identify whether there is hair impurities in each of the image data; When the image data contains the hair impurities, the position of the sizing tank corresponding to the hair impurities is determined according to the image data and cleaned.

[0011] In a second aspect, the present application provides a carbon fiber sizing system, which can implement the above-mentioned carbon fiber sizing method, and the system includes: A data acquisition module, wherein the data acquisition module is configured to obtain a set of slurry concentrations inside the sizing tank in real time; the set of slurry concentrations includes sizing agent concentrations of all detection areas in the sizing tank at the same time; A data processing module, wherein the data processing module is configured to search for the detection area corresponding to the sizing agent concentration less than the preset concentration in the slurry concentration set to obtain the slurry set to be replenished; the slurry set to be replenished includes at least one area to be replenished and the corresponding sizing agent concentration; calculate the concentration difference between the sizing agent concentration of each area to be replenished and the preset concentration; call the replenishment database, and search the difference range of the concentration difference in the replenishment database, and obtain the corresponding adjustment opening; the replenishment database includes at least: multiple difference ranges and the adjustment opening corresponding to each difference range; adjust the actual opening of all the slurry replenishment valves in the area to be replenished according to the adjustment opening.

[0012] In a third aspect, the present application provides an electronic device, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor implements the steps of a carbon fiber sizing method as described above when executing the computer program.

[0013] In a fourth aspect, the present application provides a computer-readable storage medium, wherein the computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the steps of a carbon fiber sizing method as described above are implemented.

[0014] It can be seen from the above technical solution that the present application has at least the following beneficial effects: The present application discloses a carbon fiber sizing method, which comprises: acquiring a slurry concentration set inside a sizing tank in real time, the slurry concentration set comprising sizing agent concentrations of all detection areas in the sizing tank at the same time; searching for detection areas corresponding to sizing agent concentrations less than a preset concentration in the slurry concentration set, and obtaining a slurry set to be replenished, the slurry set to be replenished comprising at least one area to be replenished and a corresponding sizing agent concentration; calculating a concentration difference between the sizing agent concentration of each area to be replenished and a preset concentration; then, calling a replenishment database, searching for a difference range in which the concentration difference lies in the replenishment database, and obtaining a corresponding adjustment opening, wherein the replenishment database comprises at least a plurality of difference ranges and an adjustment opening corresponding to each difference range; finally, adjusting the actual openings of all replenishment valves in the area to be replenished according to the adjustment opening.

[0015] The method utilizes the real-time acquired sizing agent concentrations of different detection areas and a replenishment database to determine the adjustment opening corresponding to each detection area, and adjusts the actual opening of the replenishment valve corresponding to the detection area in turn, thereby quickly shortening the difference in sizing agent concentrations of various detection areas in the sizing tank, improving the consistency and stability of the sizing agent concentration, reducing the fluctuation of the sizing amount of the final carbon fiber product, and achieving the purpose of improving the sizing quality of the carbon fiber. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Other features, objects and advantages of the present application will become more apparent from the detailed description of non-limiting embodiments made with reference to the following drawings.

[0017] Figure 1 It is a structural schematic diagram of the carbon fiber sizing device.

[0018] Figure 2 This is a schematic diagram of the structure of the grouting branch.

[0019] Figure 3 It is a schematic diagram of the structure of the stirring section.

[0020] Figure 4 Schematic diagram of the process of carbon fiber sizing method.

[0021] Figure 5 Schematic diagram of the process for identifying bubbles in sizing agents.

[0022] Figure 6 Schematic diagram of the structure of the carbon fiber sizing system.

[0023] Figure 7 A schematic diagram of the structure of an electronic device.

[0024] Numbers in the figure: 1, slurry tank; 2, heat exchanger; 3, online concentration meter; 4, slurry circulation pump; 5, flap type liquid level gauge; 6, slurry circulation tank; 7, first filter screen; 8, second filter screen; 9, first overflow filter screen; 10, first inlet roller; 11, second inlet roller; 12, slurry injector; 13, orifice plate; 14, first outlet roller; 15, second outlet roller; 16, adjustable overflow port; 17, second overflow filter screen; 18, third overflow filter screen; 19, slurry feeding branch; 20, slurry feeding port; 21, stirring part; 01. Data acquisition module; 02. Data processing module; 500, electronic device; 501, CPU; 502, ROM; 503, RAM; 504, bus; 505, I / O interface; 506, input part; 507, output part; 508, storage part; 509, communication part; 510, drive; 511, removable media DETAILED DESCRIPTION The present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the relevant invention, rather than to limit the invention. It is also necessary to explain that, for ease of description, only the parts related to the invention are shown in the accompanying drawings.

[0025] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0026] In order to make the technical solution of the present application clearer and easier to understand, the carbon fiber sizing device involved in the present application is first specifically introduced below. Figure 1 As shown, the figure is a schematic diagram of the structure of the carbon fiber sizing device, which at least includes: a material guide unit, a sizing tank 1 and a slurry circulation unit used in conjunction with each other; the material guide unit is arranged across the sizing tank 1, and is used to transport carbon fibers into and out of the sizing tank 1; the slurry circulation unit has a plurality of sizing branches 19 connected to the sizing tank 1, and each sizing branch 19 is equipped with a sizing valve; Specifically, the sizing tank 1 is used to carry the sizing agent, and a perforated plate 13 is arranged inside the sizing tank 1 in parallel with the cross section of the notch, and the perforated plate 13 can separate the carbon fiber to be sized from the sizing component of the slurry circulation unit, thereby reducing the impact of the sizing operation on the sizing quality of the carbon fiber, and a plurality of evenly distributed through holes are opened on the perforated plate 13, which can allow the sizing agent to flow out to ensure that the sizing agent can fully contact with the carbon fiber to achieve the sizing purpose. In addition, if Figure 3 As shown, a stirring portion 21 is provided at the bottom of the sizing tank 1 to assist in discharging bubbles in the sizing agent.

[0027] The material guiding unit comprises: a first entrance roller 10, a second entrance roller 11, a first exit roller 14 and a second exit roller 15 which are arranged with parallel central axes, wherein the first entrance roller 10 and the second entrance roller 11 are located on the same side of the sizing tank 1, and the first exit roller 14 and the second exit roller 15 are located on the other side of the sizing tank 1, the first entrance roller 10 and the second entrance roller 11 are used to introduce the carbon fiber to be sized into the sizing tank 1 for sizing, and the first exit roller 14 and the second exit roller 15 are used to export the carbon fiber that has been sized; and the above-mentioned first entrance roller 10 and the second exit roller 15 can be rotatably arranged on a support frame, and the support frame is straddled at the edge of the sizing tank 1, and the ends of the second entrance roller 11 and the first exit roller 14 are respectively rotatably connected to the inside of the sizing tank 1.

[0028] The slurry circulation unit includes: a slurry circulation tank 6, the slurry circulation tank 6 is connected to a first liquid replenishment pipeline and a second liquid replenishment pipeline, and control valves are respectively installed on the two liquid replenishment pipelines, for example, Figure 1 A in the figure represents the first liquid replenishment pipeline, which is used to replenish deionized water; Figure 1 B in the figure represents a second liquid replenishment pipeline, which is used to replenish the sizing agent raw material; a flap-type liquid level gauge is provided on the slurry circulation tank 6, which is used to detect the liquid level in the slurry circulation tank 6; the slurry circulation tank 6 is connected to the sizing tank 1 through a slurry replenishment pipe group, wherein the slurry replenishment pipe group includes a main pipeline and multiple slurry replenishment branches 19, one end of the main pipeline is connected to the slurry circulation tank 6, and the other end thereof is connected to multiple slurry replenishment branches 19, the other end of the slurry replenishment branch 19 extends from the bottom of the sizing tank 1 into the interior of the sizing tank 1, and a slurry replenishment valve is installed on the slurry replenishment branch 19 to control the slurry replenishment amount of the corresponding slurry replenishment branch 19; the end of the slurry replenishment branch 19 away from the main pipeline is connected to a slurry replenishment channel evenly distributed at the bottom of the sizing tank 1, and a plurality of slurry replenishment ports 20 connected to the slurry tank 1 are opened on the slurry replenishment channel; a slurry injector 12 can also be installed at each slurry replenishment port 20 to spray the slurry, which is more conducive to rapid mixing of the slurry in the slurry tank 1. A first filter screen 8 is provided at one end of the main line in the slurry circulation tank 6, and a second filter screen 8 is provided in the slurry circulation tank 6 to filter out impurities, etc. In addition, an independent stirring rod can be used to stir the liquid in the slurry circulation tank 6 to facilitate rapid mixing of deionized water and sizing agent raw materials.

[0029] Furthermore, the main line is also connected to a slurry circulation pump 4 for pumping the sizing agent in the slurry circulation tank 6 into the sizing tank 1; a heat exchanger 2 is also installed on the main line to ensure the temperature stability of the sizing agent; and an online concentration meter 3 is also installed on the main line to monitor the concentration of the sizing agent in the main line.

[0030] The carbon fiber sizing device also includes: an adjustable overflow port 16 provided at the side wall position of the sizing tank 1 near the second outlet roller 15, and an overflow plate that can move up and down is provided at the adjustable overflow port 16. By inserting overflow plates of different heights into the adjustable overflow port 16, the depth of the carbon fiber immersed in the sizing tank 1 is adjusted, generally 10-50 mm. In addition, the adjustable overflow port 16 is connected to the slurry circulation tank 6 through a guide pipe, and a first overflow filter screen 9 is provided at the connection position of the guide pipe and the slurry circulation tank 6, and a second overflow filter screen 17 and a third overflow filter screen 18 are provided at the connection position of the adjustable overflow port 6 and the guide pipe, and the cleanliness of the slurry recovered to the slurry circulation tank 6 is ensured through multi-stage filtration.

[0031] In order to make the carbon fiber sizing method provided in the embodiment of the present application clearer and easier to understand, the method is introduced below with reference to the accompanying drawings.

[0032] The generation of bubbles in the sizing tank is affected by many factors. For example, the gas (such as air, carbon dioxide, etc.) dissolved in the slurry in the sizing tank will gradually release under certain conditions (such as temperature increase or pressure decrease) to form bubbles; when the slurry is stirred, the gas will be stirred into the slurry to form bubbles; changes in temperature, pressure, pH value, etc. will also affect the generation of bubbles in the slurry, etc. In order to ensure the quality of carbon fiber sizing, this application designs the following steps.

[0033] like Figure 5 As shown in the figure, this figure is a schematic diagram of the process of identifying bubbles in the sizing agent, which includes the following steps: S001. Obtain an infrared image set of a sizing agent in a sizing tank; the infrared image set includes a plurality of infrared image information.

[0034] The plurality of infrared image information can be acquired by using an infrared thermal imager, for example, using an infrared thermal imager to detect different side wall positions of the sizing tank.

[0035] S002. Based on the infrared image set, construct a temperature distribution map corresponding to each infrared image information.

[0036] Among them, the temperature distribution diagram can show the temperature distribution of the sizing agent in the sizing tank.

[0037] S003. Traverse all temperature distribution graphs and mark abnormal image information of temperature abnormal points.

[0038] It should be noted that based on each temperature distribution diagram, the temperature distribution at different side wall positions of the sizing tank is obtained. If there are bubbles in the sizing agent, the heat conduction in the area where the bubbles are located is poor, and its temperature conditions will be different from other areas. The center point of this temperature abnormality area can be defined as the temperature abnormality point.

[0039] S004. Determine the bubble position according to the abnormal image information and generate a first warning message; the first warning message is used to prompt the staff to prohibit starting the sizing operation.

[0040] It should be noted that when using an infrared thermal imager to detect at different side wall positions of the sizing tank, the current side wall position has been recorded in the infrared image information; by obtaining the side wall position in the abnormal image information, it can be known which side wall of the sizing tank the bubble position is closer to, and the first warning information is generated using the aforementioned information to remind the staff that there are bubbles in the current sizing tank. If the sizing operation is forcibly started, it will affect the compatibility between the carbon fiber and the sizing agent as well as the strength and stiffness of the carbon fiber after sizing.

[0041] Furthermore, after marking the abnormal image information with abnormal temperature points and before generating the first warning information, the following steps are also included: Adjust the speed of the stirring part according to the straight-line distance between the center point of the bubble position and the stirring part at the bottom of the sizing tank.

[0042] It should be noted that a three-dimensional coordinate system can be constructed with any vertex of the sizing tank as the origin, an extension line passing through the origin and coinciding with the length direction of the sizing tank as the X-axis, an extension line passing through the origin and coinciding with the width direction of the sizing tank as the Y-axis, and an extension line passing through the origin and coinciding with the height direction of the sizing tank as the Z-axis; the coordinates of the center point of the bubble position and the coordinates of the top of the stirring part are obtained in the three-dimensional coordinate system, and the straight-line distance between the center point of the bubble position and the stirring part at the bottom of the sizing tank is calculated based on the above two coordinates.

[0043] Then, according to the above linear distance, the rotation speed of the stirring part is adjusted so that the vortex area generated when the stirring part stirs the sizing agent in the sizing tank covers the temperature abnormal point, thereby discharging the bubbles. For example, the relationship between the rotation speed of the stirring part and the radius of the vortex area formed by it is shown in Table 1.

[0044] Table 1 Speed-radius database

[0045] Among them, z in Table 1 represents different rotation speeds, and b represents different radii; Table 1 is based on empirical data obtained during actual use and is for reference only. For example, if the straight-line distance obtained is m, and b3≤m≤b2, the rotation speed of the stirring part is adjusted to z3, so that the vortex area can cover the temperature anomaly point and achieve the purpose of discharging bubbles. Here, due to the different specifications of the stirring part actually used or the length of the stirring blade it carries, the relationship between the rotation speed of the stirring part and the radius of the vortex area can be adjusted up and down again based on the data in Table 1 in actual adjustment to ensure that the radius of the vortex area is always greater than the straight-line distance to ensure the bubble discharge effect.

[0046] In addition, during the process of cleaning bubbles in the above-mentioned manner or after the above-mentioned bubble removal method is completed, ultrasonic detection technology is used to detect whether there are still bubbles in the sizing tank. An ultrasonic transmitter and an ultrasonic receiver can be respectively arranged on both sides of the two symmetrically arranged side walls of the sizing tank. The ultrasonic transmitter emits a detection ultrasonic wave, and the ultrasonic receiver receives the detection ultrasonic wave. If the acoustic impedances obtained after passing through the sizing agent at various locations in the sizing tank are the same, it indicates that there are no bubbles in the current sizing tank. If there is at least one different acoustic impedance, there are bubbles in the area where the acoustic impedance passes, and it still needs to be cleared by the above-mentioned bubble cleaning method. Detect again until the acoustic impedances at all locations are exactly the same, and then execute subsequent steps.

[0047] When there are no bubbles in the sizing tank, perform the following steps.

[0048] like Figure 4 As shown, the figure is a schematic diagram of the process of the carbon fiber sizing method provided in the embodiment of the present application, and the method comprises the following steps: S100, obtaining a set of sizing agent concentrations inside the sizing tank in real time; the set of sizing agent concentrations includes sizing agent concentrations of all detection areas in the sizing tank at the same time.

[0049] The process of obtaining the slurry concentration set inside the sizing tank in real time specifically includes the following steps: The sizing tank is divided into a plurality of detection areas along the sizing movement direction of the carbon fiber; The sizing agent concentrations of all detection areas are collected synchronously to obtain the sizing agent concentration set inside the sizing tank.

[0050] It should be noted that the sizing movement direction of the carbon fiber is, for example, Figure 1 The detection area can be divided into a rectangular division method, a U-shaped division method, etc.; for example, the sizing tank is divided into a plurality of continuous rectangular detection areas according to the length and width of the sizing tank. Here, a concentration detector can be used to collect the sizing agent concentration in the detection area.

[0051] Furthermore, the present application also designs a specific method for dividing the detection area. Specifically, the sizing tank is divided into multiple detection areas along the sizing movement direction of the carbon fiber, including the following steps: Obtain a historical concentration set of the sizing tank; the historical concentration set includes at least: multiple sets of concentration data at consecutive historical moments; each set of concentration data includes the concentration of each initial detection point of the sizing tank corresponding to the sizing of a preset length of carbon fiber; Generate a concentration change curve according to the historical concentration set, and determine the division node based on the concentration change curve; According to the division nodes, the sizing tank is divided into multiple detection areas along the sizing movement direction of the carbon fiber.

[0052] It should be noted that the initial detection point can be any position point in the sizing tank. The preset length is, for example, 3000 mm, which can be set according to actual needs. Here, the carbon fiber of the preset length is used as the test carbon fiber for dividing the detection area in the present application. The test carbon fiber is immersed in the sizing tank and moved according to the guiding direction of the material guide unit, and the concentration data of continuous historical moments are collected within the time range of the test carbon fiber being immersed in the sizing tank. Each set of concentration data refers to the concentration data collected at continuous historical moments of each initial detection point, which can be defined as a subset. The historical concentration set includes subsets corresponding to all initial detection points; the concentration change curve formed based on the historical concentration set includes curves corresponding to multiple different initial detection points. The concentration mutation position corresponding to each initial detection point can be known from the concentration change curve. The sizing tank is divided into multiple detection areas with the concentration mutation position as the center and the middle position of the straight-line distance between two adjacent concentration mutation positions along the carbon fiber sizing movement direction as the boundary.

[0053] S101, searching for detection areas corresponding to sizing agent concentrations less than a preset concentration in a slurry concentration set to obtain a slurry set to be replenished; the slurry set to be replenished includes at least one area to be replenished and a corresponding sizing agent concentration.

[0054] Among them, the preset concentration is set according to the sizing requirements of different carbon fibers.

[0055] If the sizing agent concentration in the slurry concentration concentration is greater than or equal to the preset concentration, then the concentration in the corresponding detection area meets the sizing requirement, and there is no need to adjust the opening of the corresponding slurry replenishment valve.

[0056] S102, calculating the concentration difference between the sizing agent concentration of each area to be replenished and the preset concentration.

[0057] Among them, the sizing agent concentration in each area to be replenished is different or not exactly the same. In order to accurately adjust the opening of the slurry valve in each area to be replenished, it is necessary to calculate the concentration difference and make corresponding adjustments based on the concentration difference. This can increase the concentration adjustment rate of each detection area in the sizing tank, avoid long-term shutdown, and affect work efficiency.

[0058] S103, calling a liquid infusion database, searching the liquid infusion database for a difference range in which the concentration difference is located, and obtaining a corresponding adjustment opening; the liquid infusion database at least includes: a plurality of difference ranges and an adjustment opening corresponding to each difference range.

[0059] The liquid replenishment database is shown in Table 2. Adjusting the opening refers to the opening that needs to be increased based on the current opening of the slurry replenishment valve. In Table 2, M represents the concentration difference.

[0060] Table 2 Fluid rehydration database

[0061] S104. Adjust the actual opening degrees of all slurry replenishing valves in the area to be replenished according to the adjusted opening degree.

[0062] For example, if the concentration difference range in a certain area to be replenished is 5 < M ≤ 10, then all the slurry replenishing valves in this area to be replenished should be adjusted by 6° to quickly replenish the slurry concentration.

[0063] Among them, the opening degrees to be adjusted for the slurry replenishing valves in the same area to be replenished are the same to quickly increase the concentration in this area and ensure the sizing quality of carbon fiber.

[0064] This method uses the sizing agent concentrations of different detection areas obtained in real time and the replenishment database to determine the adjusted opening degrees corresponding to each detection area, and then adjusts the actual opening degrees of the slurry replenishing valves corresponding to the detection areas in sequence, so as to quickly shorten the gap of the sizing agent concentrations in each detection area in the sizing tank, improve the consistency and stability of the sizing agent concentration, reduce the fluctuation degree of the sizing amount of the finally obtained carbon fiber product, and achieve the purpose of improving the sizing quality of carbon fiber.

[0065] Furthermore, this method further includes the following steps: Obtain multiple image data inside the sizing tank and identify whether there are filament impurities in each image data; When there are filament impurities in the image data, determine the position of the sizing tank corresponding to the filament impurities according to this image data and clean it.

[0066] It should be noted that a camera can be used to take pictures at different positions of the sizing tank to obtain multiple image data, and each image is analyzed through image processing software to identify whether there are filament impurities. If there are filament impurities in a certain image data, the position range of the filament impurities can be found according to the position of the sizing tank corresponding to this image data when it is taken, and then the specific position of the filament impurities can be obtained and cleaned by using the human eye or a magnifying glass, etc. Specifically, a stirring device with a low rotation speed is used to stir around the sizing agent with filament impurities to make the filament impurities float gently. When the filament impurities float to the surface of the sizing agent, they are fished out by using a sieve or sucked out by using a magnet or electrostatic method to avoid the existence of filament impurities before and during sizing, which affects the final sizing quality of carbon fiber. And, the sizing agent after cleaning needs to be inspected to ensure that its performance meets the requirements of subsequent processing.

[0067] Here, the camera is, for example, an optical fiber camera or an automatic optical inspection system.

[0068] Furthermore, the carbon fiber after sizing needs to be dried; the dried carbon fiber products are locally inspected, and images of random local positions of the carbon fiber products are taken to identify whether there are cracks in the images. If cracks exist, it indicates that the drying rate is too fast and needs to be slowed down. If there are no cracks in all images, there is no need to adjust the drying rate; by regularly inspecting the carbon fiber products for cracks, the drying rate is controlled to ensure the qualified rate of the finished products.

[0069] Combination of the above Figure 4 and Figure 5 The carbon fiber sizing method provided in the embodiment of the present application is introduced in detail. The device and equipment provided in the embodiment of the present application will be introduced in conjunction with the accompanying drawings.

[0070] like Figure 6 As shown, the present application provides a carbon fiber sizing system, which can implement the above-mentioned carbon fiber sizing method, and the system includes: The data acquisition module 01 is configured to obtain a set of sizing agent concentrations inside the sizing tank in real time; the set of sizing agent concentrations includes the sizing agent concentrations of all detection areas in the sizing tank at the same time; Data processing module 02, data processing module 02 is configured to search for the detection area corresponding to the sizing agent concentration less than the preset concentration in the slurry concentration set, and obtain the slurry set to be replenished; the slurry set to be replenished includes at least one area to be replenished and the corresponding sizing agent concentration; calculate the concentration difference between the sizing agent concentration and the preset concentration in each area to be replenished; call the replenishment database, and search the difference range of the concentration difference in the replenishment database, and obtain the corresponding adjustment opening; the replenishment database includes at least: multiple difference ranges and the adjustment opening corresponding to each difference range; adjust the actual opening of all slurry replenishment valves in the area to be replenished according to the adjustment opening.

[0071] The present application provides an electronic device, including a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, the steps of a carbon fiber sizing method as described in the above embodiment are implemented.

[0072] Among them, Figure 7 As shown, electronic device 500 includes CPU 501, which can perform various appropriate actions and processes according to the program stored in ROM 502 or the program loaded from the storage part into RAM 503. Various programs and data required for system operation are also stored in RAM 503. CPU 501, ROM 502 and RAM 503 are connected to each other through bus 504. I / O interface 505 is also connected to bus 504.

[0073] The following components are connected to the I / O interface 505: an input section 506 including a keyboard, a mouse, etc.; an output section 507 including a cathode ray tube (CRT), a liquid crystal display (LCD), etc., and a speaker, etc.; a storage section 508 including a hard disk, etc.; and a communication section 509 including a network interface card such as a LAN card, a modem, etc. The communication section 509 performs communication processing via a network such as the Internet. A drive is also connected to the I / O interface 505 as needed. A removable medium 511, such as a magnetic disk, an optical disk, a magneto-optical disk, a semiconductor memory, etc., is installed on the drive 510 as needed, so that a computer program read therefrom is installed into the storage section 508 as needed.

[0074] In particular, according to the embodiments of the present application, the above reference process Figure 4 The described process can be implemented as a computer software program. For example, the present application includes a computer program product, which includes a computer program carried on a computer readable medium, and the computer program contains program code for executing the method shown in the flow chart. In such an embodiment, the computer program can be downloaded and installed from a network through a communication part, and / or installed from a removable medium. When the computer program is executed by CPU501, the above-mentioned functions defined in the system of the present application are executed.

[0075] It should be noted that the computer-readable medium shown in the present application may be a computer-readable signal medium or a computer-readable storage medium or any combination of the above two. The computer-readable storage medium may be, for example, but not limited to, an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, device or device, or any combination of the above. More specific examples of computer-readable storage media may include, but are not limited to: an electrical connection with one or more wires, a portable computer disk, a hard disk, a RAM (random access memory), a ROM (read-only memory), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the above. In the present application, a computer-readable storage medium may be any tangible medium containing or storing a program that can be used by or in combination with an instruction execution system, device or device. In the present application, a computer-readable signal medium may include a data signal propagated in a baseband or as part of a carrier wave, which carries a computer-readable program code. This propagated data signal may take a variety of forms, including but not limited to electromagnetic signals, optical signals, or any suitable combination of the above. Computer-readable signal media may also be any computer-readable medium other than computer-readable storage media, which may send, propagate or transmit a program for use by or in conjunction with an instruction execution system, apparatus or device. The program code contained on the computer-readable medium may be transmitted using any appropriate medium, including but not limited to: wireless, wire, optical cable, RF, etc., or any suitable combination of the above.

[0076] The flow chart and block diagram in the accompanying drawings illustrate the possible architecture, function and operation of the system, method and computer program product according to various embodiments of the present application. In this regard, each box in the flow chart or block diagram can represent a module, a program segment or a part of a code, and the above-mentioned module, program segment or a part of a code contains one or more executable instructions for realizing the specified logical function. It should also be noted that in some alternative implementations, the functions marked in the box can also occur in a different order from the order marked in the accompanying drawings. For example, two boxes represented in succession can actually be executed substantially in parallel, and they can sometimes be executed in the opposite order, depending on the functions involved. It should also be noted that each box in the block diagram or flow chart, and the combination of the boxes in the block diagram or flow chart can be implemented with a dedicated hardware-based system that performs a specified function or operation, or can be implemented with a combination of dedicated hardware and computer instructions.

[0077] The units involved in the embodiments described in the present application may be implemented by software or hardware, and the units described may also be set in a processor. The names of these units do not constitute limitations on the units themselves under certain circumstances. The units or modules described may also be set in a processor.

[0078] The present application also provides a computer-readable storage medium, which may be included in the electronic device described in the above embodiment; or may exist independently without being assembled into the electronic device. The above computer-readable medium carries one or more programs, and when the above one or more programs are executed by an electronic device, the electronic device implements a carbon fiber sizing method as described in the above embodiment.

[0079] The above description is only a preferred embodiment of the present application and an explanation of the technical principles used. Those skilled in the art should understand that the scope of the invention involved in the present application is not limited to the technical solution formed by a specific combination of the above technical features, but should also cover other technical solutions formed by any combination of the above technical features or their equivalent features without departing from the inventive concept. For example, the above features are replaced with (but not limited to) technical features with similar functions disclosed in the present application.

Claims

1. A carbon fiber sizing method, applied to a carbon fiber sizing device, the carbon fiber sizing device at least comprising: The material guide unit, sizing tank and slurry circulation unit are used together; The material guide unit is arranged across the sizing tank and is used to transport carbon fibers into and out of the sizing tank; the slurry circulation unit has a plurality of slurry feed branches connected to the sizing tank, and each of the slurry feed branches is equipped with a slurry feed valve; the method comprises the following steps: Acquire a set of slurry concentrations inside the sizing tank in real time; the set of slurry concentrations includes sizing agent concentrations of all detection areas in the sizing tank at the same time; Searching for the detection area corresponding to the sizing agent concentration less than the preset concentration in the slurry concentration set to obtain the slurry set to be replenished; the slurry set to be replenished includes at least one area to be replenished and the corresponding sizing agent concentration; Calculating the concentration difference between the sizing agent concentration of each of the areas to be replenished and the preset concentration; Calling a liquid replenishment database, and searching the liquid replenishment database for the difference range in which the concentration difference value is located, and obtaining the corresponding adjustment opening; the liquid replenishment database at least includes: a plurality of difference ranges and the adjustment opening corresponding to each of the difference ranges; The actual openings of all the slurry replenishing valves in the area to be replenished are adjusted according to the adjustment openings.

2. A carbon fiber sizing method according to claim 1, characterized in that: Real-time acquisition of the slurry concentration set inside the sizing tank specifically includes the following steps: Dividing the sizing tank into a plurality of detection areas along the sizing movement direction of the carbon fiber; The sizing agent concentrations of all detection areas are collected synchronously to obtain the sizing agent concentration set inside the sizing tank.

3. A carbon fiber sizing method according to claim 2, characterized in that: The sizing tank is divided into a plurality of detection areas along the sizing movement direction of the carbon fiber, specifically comprising the following steps: Obtain a historical concentration set of the sizing tank; the historical concentration set at least includes: multiple sets of concentration data at consecutive historical moments; each set of concentration data includes the concentration of each initial detection point of the sizing tank corresponding to the sizing of the carbon fiber of a preset length; generating a concentration change curve according to the historical concentration set, and determining a division node based on the concentration change curve; According to the division nodes, the sizing tank is divided into a plurality of detection areas along the sizing moving direction of the carbon fiber.

4. A carbon fiber sizing method according to claim 1, characterized in that: Before obtaining the slurry concentration set inside the sizing tank in real time, the following steps are also included: Acquire an infrared image set of the sizing agent in the sizing tank; the infrared image set includes a plurality of infrared image information; Based on the infrared image set, construct a temperature distribution map corresponding to each infrared image information; Traversing all the temperature distribution graphs, marking abnormal image information of temperature abnormal points; The bubble position is determined according to the abnormal image information, and a first warning message is generated; the first warning message is used to prompt the staff to prohibit starting the sizing operation.

5. A carbon fiber sizing method according to claim 4, characterized in that: After marking the abnormal image information with abnormal temperature points and before generating the first warning information, the following steps are also included: The rotation speed of the stirring part is adjusted according to the straight-line distance between the center point of the bubble position and the stirring part at the bottom of the sizing tank.

6. A carbon fiber sizing method according to claim 1, characterized in that: The following steps are also included: Acquire multiple image data of the interior of the sizing tank, and identify whether there is hair impurities in each of the image data; When the image data contains the hair impurities, the position of the sizing tank corresponding to the hair impurities is determined according to the image data and cleaned.

7. A carbon fiber sizing system, capable of implementing a carbon fiber sizing method according to any one of claims 1 to 6, characterized in that: The system comprises: A data acquisition module, wherein the data acquisition module is configured to obtain a set of slurry concentrations inside the sizing tank in real time; the set of slurry concentrations includes sizing agent concentrations of all detection areas in the sizing tank at the same time; A data processing module, wherein the data processing module is configured to search for the detection area corresponding to the sizing agent concentration less than the preset concentration in the slurry concentration set to obtain the slurry set to be replenished; the slurry set to be replenished includes at least one area to be replenished and the corresponding sizing agent concentration; calculate the concentration difference between the sizing agent concentration of each area to be replenished and the preset concentration; call the replenishment database, and search the difference range of the concentration difference in the replenishment database, and obtain the corresponding adjustment opening; the replenishment database includes at least: multiple difference ranges and the adjustment opening corresponding to each difference range; adjust the actual opening of all the slurry replenishment valves in the area to be replenished according to the adjustment opening.

8. An electronic device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that: When the processor executes the computer program, the steps of a carbon fiber sizing method as described in any one of claims 1 to 6 are implemented.

9. A computer-readable storage medium storing a computer program, characterized in that: When the computer program is executed by a processor, the steps of a carbon fiber sizing method as described in any one of claims 1 to 6 are implemented.

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